current code from svn, revision 62608

39 files changed, 7666 insertions, 0 deletions

diff --git a/lib/elearning/ConnectedCMS.class.php b/lib/elearning/ConnectedCMS.class.php
new file mode 100644
index 0000000..7245761
--- /dev/null
+++ b/lib/elearning/ConnectedCMS.class.php
@@ -0,0 +1,458 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/**
+* main-class for connected systems
+*
+* This class contains the main methods of the elearning-interface to connect content-management-systems.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ConnectedCMS
+* @package  ELearning-Interface
+*/
+class ConnectedCMS
+{
+    var $title;
+
+    var $is_active;
+    var $cms_type;
+    var $name;
+    var $ABSOLUTE_PATH_ELEARNINGMODULES;
+    var $ABSOLUTE_PATH_SOAP;
+    var $RELATIVE_PATH_DB_CLASSES;
+    var $CLASS_PREFIX;
+    var $auth_necessary;
+    var $USER_AUTO_CREATE;
+    var $USER_PREFIX;
+    var $target_file;
+    var $logo_file;
+    var $DB_ELEARNINGMODULES_HOST;
+    var $DB_ELEARNINGMODULES_USER;
+    var $DB_ELEARNINGMODULES_PASSWORD;
+    var $DB_ELEARNINGMODULES_DATABASE;
+    var $db_classes;
+    var $soap_data;
+    var $soap_client;
+    var $types;
+    var $roles;
+
+    var $db;
+    var $db_class;
+    var $link;
+    var $user;
+    var $permissions;
+    var $content_module;
+    /**
+    * constructor
+    *
+    * init class. don't call directly but by extending class ("new Ilias3ConnectedCMS($cms)" for example), except for basic administration
+    * @access
+    * @param string $cms system-type
+    */
+    public function __construct($cms = "")
+    {
+        $this->cms_type = $cms;
+        if (Config::get()->getValue("ELEARNING_INTERFACE_{$this->cms}_ACTIVE")) {
+            $this->is_active = true;
+        }
+        else {
+            $this->is_active = false;
+        }
+        $this->init($cms);
+    }
+
+    /**
+    * init settings
+    *
+    * gets settings from config-array and initializes db
+    * @access private
+    * @param string $cms system-type
+    */
+    public function init($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+        $this->name = $ELEARNING_INTERFACE_MODULES[$cms]["name"];
+        $this->ABSOLUTE_PATH_ELEARNINGMODULES = $ELEARNING_INTERFACE_MODULES[$cms]["ABSOLUTE_PATH_ELEARNINGMODULES"];
+        $this->ABSOLUTE_PATH_SOAP = $ELEARNING_INTERFACE_MODULES[$cms]["ABSOLUTE_PATH_SOAP"];
+        if (isset($ELEARNING_INTERFACE_MODULES[$cms]["RELATIVE_PATH_DB_CLASSES"]))
+        {
+            $this->RELATIVE_PATH_DB_CLASSES = $ELEARNING_INTERFACE_MODULES[$cms]["RELATIVE_PATH_DB_CLASSES"];
+            $this->db_classes = $ELEARNING_INTERFACE_MODULES[$cms]["db_classes"];
+        }
+        else {
+            $this->RELATIVE_PATH_DB_CLASSES = false;
+        }
+        $this->CLASS_PREFIX = $ELEARNING_INTERFACE_MODULES[$cms]["CLASS_PREFIX"];
+        $this->auth_necessary = $ELEARNING_INTERFACE_MODULES[$cms]["auth_necessary"];
+        $this->USER_AUTO_CREATE = $ELEARNING_INTERFACE_MODULES[$cms]["USER_AUTO_CREATE"];
+        $this->USER_PREFIX = $ELEARNING_INTERFACE_MODULES[$cms]["USER_PREFIX"];
+        $this->target_file = $ELEARNING_INTERFACE_MODULES[$cms]["target_file"];
+        $this->logo_file = $ELEARNING_INTERFACE_MODULES[$cms]["logo_file"];
+        $this->DB_ELEARNINGMODULES_HOST = $ELEARNING_INTERFACE_MODULES[$cms]["DB_ELEARNINGMODULES_HOST"];
+        $this->DB_ELEARNINGMODULES_USER = $ELEARNING_INTERFACE_MODULES[$cms]["DB_ELEARNINGMODULES_USER"];
+        $this->DB_ELEARNINGMODULES_PASSWORD = $ELEARNING_INTERFACE_MODULES[$cms]["DB_ELEARNINGMODULES_PASSWORD"];
+        $this->DB_ELEARNINGMODULES_DATABASE = $ELEARNING_INTERFACE_MODULES[$cms]["DB_ELEARNINGMODULES_DATABASE"];
+        if ($this->DB_ELEARNINGMODULES_HOST != "") {
+            $this->db = new DB_ELearning($this->cms_type);
+        }
+        $this->soap_data = $ELEARNING_INTERFACE_MODULES[$cms]["soap_data"];
+        $this->types = $ELEARNING_INTERFACE_MODULES[$cms]["types"];
+        $this->roles = $ELEARNING_INTERFACE_MODULES[$cms]["roles"];
+    }
+
+    /**
+    * init subclasses
+    *
+    * loads classes for user-functions
+    * @access public
+    */
+    public function initSubclasses()
+    {
+        if ($this->auth_necessary)
+        {
+            require_once($this->CLASS_PREFIX . "ConnectedUser.class.php");
+            $classname = $this->CLASS_PREFIX . "ConnectedUser";
+            $this->user = new $classname($this->cms_type);
+            require_once($this->CLASS_PREFIX  . "ConnectedPermissions.class.php");
+            $classname = $this->CLASS_PREFIX  . "ConnectedPermissions";
+            $this->permissions = new $classname($this->cms_type);
+        }
+        require_once($this->CLASS_PREFIX . "ConnectedLink.class.php");
+        $classname = $this->CLASS_PREFIX . "ConnectedLink";
+        $this->link = new $classname($this->cms_type);
+    }
+
+    /**
+    * get connection status
+    *
+    * checks settings
+    * @access public
+    * @param string $cms system-type
+    * @return array messages
+    */
+    public function getConnectionStatus($cms = "")
+    {
+        if ($this->cms_type == "")
+        {
+            $this->init($cms);
+        }
+        // check connection to CMS
+
+        if (!$this->auth_necessary) {
+            $msg["auth"]["info"] = sprintf(_("Eine Authentifizierung ist für dieses System nicht vorgesehen."));
+        }
+
+        // check for SOAP-Interface
+        if (in_array($this->CLASS_PREFIX, ['Ilias3','Ilias4','Ilias5']))
+        {
+            $check = @get_headers($this->ABSOLUTE_PATH_ELEARNINGMODULES . 'login.php');
+            if (strpos($check[0], '200') === false) {
+                $msg["path"]["error"] = sprintf(_("Die Verbindung zum System \"%s\" konnte nicht hergestellt werden. Der Pfad \"$this->ABSOLUTE_PATH_ELEARNINGMODULES\" ist ungültig."), $this->name);
+
+            } else {
+                $msg["path"]["info"] = sprintf(_("Die %s-Installation wurde gefunden."), $this->name);
+            }
+
+            if (!Config::get()->SOAP_ENABLE) {
+                $msg["soap"]["error"] = sprintf(_("Das Stud.IP-Modul für die SOAP-Schnittstelle ist nicht aktiviert. Ändern Sie den entsprechenden Eintrag in der Konfigurationsdatei \"local.inc\"."));
+            }
+            elseif (! is_array($this->soap_data)) {
+                $msg["soap"]["error"] = sprintf(_("Die SOAP-Verbindungsdaten sind für dieses System nicht gesetzt. Ergänzen Sie die Einstellungen für dieses Systems um den Eintrag \"soap_data\" in der Konfigurationsdatei \"local.inc\"."));
+            }
+            else
+            {
+                $this->soap_client = new StudipSoapClient($this->ABSOLUTE_PATH_SOAP);
+                $msg["soap"]["info"] = sprintf(_("Das SOAP-Modul ist aktiv."));
+            }
+        } else {
+            $file = fopen($this->ABSOLUTE_PATH_ELEARNINGMODULES."", "r");
+            if ($file == false)
+            {
+                $msg["path"]["error"] = sprintf(_("Die Verbindung zum System \"%s\" konnte nicht hergestellt werden. Der Pfad \"$this->ABSOLUTE_PATH_ELEARNINGMODULES\" ist ungültig."), $this->name);
+            }
+            else
+            {
+                fclose($file);
+                $msg["path"]["info"] = sprintf(_("Die %s-Installation wurde gefunden."), $this->name);
+
+                // check if target-file exists
+                $file = fopen($this->ABSOLUTE_PATH_ELEARNINGMODULES.$this->target_file, "r");
+                if ($file == false)
+                {
+                    $msg["auth"]["error"] = sprintf(_("Die Zieldatei \"%s\" liegt nicht im Hauptverzeichnis der %s-Installation."), $this->target_file, $this->name);
+                }
+                else
+                {
+                    fclose($file);
+                    $msg["auth"]["info"] = sprintf(_("Die Zieldatei ist vorhanden."));
+                }
+            }
+        }
+
+        $el_path = $GLOBALS['STUDIP_BASE_PATH'] . '/lib/elearning';
+        // check if needed classes exist
+        if (!file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedUser.class.php") && ($this->auth_necessary)) {
+            $msg["class_user"]["error"] .= sprintf(_("Die Datei \"%s\" existiert nicht."), $el_path."/" . $this->CLASS_PREFIX . "ConnectedUser.class.php");
+        }
+        if (!file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedPermissions.class.php") && ($this->auth_necessary)) {
+            $msg["class_perm"]["error"] .= sprintf(_("Die Datei \"%s\" existiert nicht."), $el_path."/" . $this->CLASS_PREFIX . "ConnectedPermissions.class.php");
+        }
+        if (!file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedLink.class.php")) {
+            $msg["class_link"]["error"] .= sprintf(_("Die Datei \"%s\" existiert nicht."), $el_path."/" . $this->CLASS_PREFIX . "ConnectedLink.class.php");
+        }
+        if (!file_exists($el_path."/" . $this->CLASS_PREFIX . "ContentModule.class.php")) {
+            $msg["class_content"]["error"] .= sprintf(_("Die Datei \"%s\" existiert nicht."), $el_path."/" . $this->CLASS_PREFIX . "ContentModule.class.php");
+        }
+        if (!file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedCMS.class.php")) {
+            $msg["class_cms"]["error"] .= sprintf(_("Die Datei \"%s\" existiert nicht."), $el_path."/" . $this->CLASS_PREFIX . "ConnectedCMS.class.php");
+        }
+        if (file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedCMS.class.php") &&
+            (file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedUser.class.php") || (!$this->auth_necessary)) &&
+            (file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedPermissions.class.php") || (!$this->auth_necessary)) &&
+            file_exists($el_path."/" . $this->CLASS_PREFIX . "ConnectedLink.class.php") &&
+            file_exists($el_path."/" . $this->CLASS_PREFIX . "ContentModule.class.php"))
+        {
+            require_once ($el_path."/" . $this->CLASS_PREFIX . "ConnectedCMS.class.php");
+            $msg["classes"]["info"] .= sprintf(_("Die Klassen der Schnittstelle zum System \"%s\" wurden geladen."), $this->name);
+        }
+        else
+        {
+            $msg["classes"]["error"] .= sprintf(_("Die Klassen der Schnittstelle zum System \"%s\" wurden nicht geladen."), $this->name);
+        }
+
+        return $msg;
+    }
+
+    /**
+    * get preferences
+    *
+    * shows additional settings. can be overwritten by subclass.
+    * @access public
+    */
+    public function getPreferences()
+    {
+        if ($this->types != "")
+        {
+            echo "<b>" . _("Angebundene Lernmodul-Typen: ") . "</b>";
+            echo "<br>\n";
+            foreach($this->types as $key => $type)
+                echo Icon::create($type["icon"], Icon::ROLE_INACTIVE)->asImg() . $type["name"] . " ($key)<br>\n";
+            echo "<br>\n";
+        }
+
+        if ($this->db_classes != "")
+        {
+            echo "<b>" . _("Verwendete DB-Zugriffs-Klassen: ") . "</b>";
+            echo "<br>\n";
+            foreach($this->db_classes as $key => $type) {
+                echo $type["file"] . " ($key)<br>\n";
+            }
+            echo "<br>\n";
+        }
+    }
+
+    /**
+    * create new instance of subclass content-module with given values
+    *
+    * creates new instance of subclass content-module with given values
+    * @access public
+    * @param array $data module-data
+    * @param boolean $is_connected is module connected to seminar?
+    */
+    public function setContentModule($data, $is_connected = false)
+    {
+        global $current_module;
+        $current_module = $data["ref_id"];
+
+        require_once($this->CLASS_PREFIX . "ContentModule.class.php");
+        $classname = $this->CLASS_PREFIX  . "ContentModule";
+
+        $this->content_module[$current_module] = new  $classname("", $data["type"], $this->cms_type);
+        $this->content_module[$current_module]->setId($data["ref_id"]);
+        $this->content_module[$current_module]->setTitle($data["title"]);
+        $this->content_module[$current_module]->setDescription($data["description"]);
+        $this->content_module[$current_module]->setConnectionType($is_connected);
+    }
+
+    /**
+    * create new instance of subclass content-module
+    *
+    * creates new instance of subclass content-module
+    * @access public
+    * @param string $module_id module-id
+    * @param string $module_type module-type
+    * @param boolean $is_connected is module connected to seminar?
+    */
+    public function newContentModule($module_id, $module_type, $is_connected = false)
+    {
+        global $current_module;
+        $current_module = $module_id;
+
+        require_once($this->CLASS_PREFIX . "ContentModule.class.php");
+        $classname = $this->CLASS_PREFIX  . "ContentModule";
+
+        if ($is_connected == false)
+        {
+            $this->content_module[$module_id] = new  $classname("", $module_type, $this->cms_type);
+            $this->content_module[$module_id]->setId($module_id);
+        }
+        else
+        {
+            $this->content_module[$module_id] = new  $classname($module_id, $module_type, $this->cms_type);
+        }
+
+        $this->content_module[$module_id]->setConnectionType($is_connected);
+    }
+
+    /**
+    * get name of cms
+    *
+    * returns name of cms
+    * @access public
+    * @return string name
+    */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+    * get type of cms
+    *
+    * returns type of cms
+    * @access public
+    * @return string type
+    */
+    public function getCMSType()
+    {
+        return $this->cms_type;
+    }
+
+    /**
+    * get path of cms
+    *
+    * returns path of cms
+    * @access public
+    * @return string path
+    */
+    public function getAbsolutePath()
+    {
+        return $this->ABSOLUTE_PATH_ELEARNINGMODULES;
+    }
+
+    /**
+    * get target file of cms
+    *
+    * returns target file of cms
+    * @access public
+    * @return string target file
+    */
+    public function getTargetFile()
+    {
+        return $this->target_file;
+    }
+
+    /**
+    * get class prefix
+    *
+    * returns class prefix
+    * @access public
+    * @return string class prefix
+    */
+    public function getClassPrefix()
+    {
+        return $this->CLASS_PREFIX;
+    }
+
+    /**
+    * get authentification-setting
+    *
+    * returns true, if authentification is necessary
+    * @access public
+    * @return boolean authentification-setting
+    */
+    public function isAuthNecessary()
+    {
+        return $this->auth_necessary;
+    }
+
+    /**
+    * get active-setting
+    *
+    * returns true, if cms is active
+    * @access public
+    * @return boolean active-setting
+    function isActive($cms = "")
+    {
+        return $this->is_active;
+    }
+    */
+
+    /**
+    * get user prefix
+    *
+    * returns user prefix
+    * @access public
+    * @return string user prefix
+    */
+    public function getUserPrefix()
+    {
+        return $this->USER_PREFIX;
+    }
+
+    /**
+    * get logo-image
+    *
+    * returns logo-image
+    * @access public
+    * @return string logo-image
+    */
+    public function getLogo()
+    {
+        return "<img src=\"" . $this->logo_file . "\">";
+    }
+
+    /**
+    * get user modules
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    public function getUserContentModules()
+    {
+        return false;
+    }
+
+    /**
+    * search modules
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    public function searchContentModules($key)
+    {
+        return false;
+    }
+
+    /**
+    * terminate
+    *
+    * dummy-method. returns false. can be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    public function terminate()
+    {
+        return false;
+    }
+
+    public function deleteConnectedModules($object_id){
+        return ObjectConnections::DeleteAllConnections($object_id, $this->cms_type);
+    }
+}
\ No newline at end of file
diff --git a/lib/elearning/ConnectedLink.class.php b/lib/elearning/ConnectedLink.class.php
new file mode 100644
index 0000000..2be5a12
--- /dev/null
+++ b/lib/elearning/ConnectedLink.class.php
@@ -0,0 +1,129 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/**
+* class to generate links to connected systems
+*
+* This class contains methods to generate links to connected content-management-systems.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ConnectedLink
+* @package  ELearning-Interface
+*/
+
+use Studip\Button, Studip\LinkButton;
+
+class ConnectedLink
+{
+    var $cms_type;
+    var $cms_link;
+    /**
+    * constructor
+    *
+    * init class. don't call directly, class is loaded by ConnectedCMS.
+    * @access public
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+
+        $this->cms_type = $cms;
+        $this->cms_link = $ELEARNING_INTERFACE_MODULES[$cms]["ABSOLUTE_PATH_ELEARNINGMODULES"] . $ELEARNING_INTERFACE_MODULES[$cms]["target_file"];
+    }
+
+    /**
+    * get link to create new account
+    *
+    * returns link to create new user-account
+    * @access public
+    * @return string html-code
+    */
+    function getNewAccountLink()
+    {
+        global $connected_cms, $cms_select, $current_module;
+
+        $output .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">\n";
+        $output .= CSRFProtection::tokenTag();
+        $output .= "<input type=\"HIDDEN\" name=\"view\" value=\"" . Request::option('view') . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"ref_id\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getId()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_type\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"search_key\" value=\"" . htmlReady(Request::get('search_key')) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"cms_select\" value=\"" . htmlReady($cms_select) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"new_account_cms\" value=\"" . htmlReady($this->cms_type) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"new_account_step\" value=\"0\">\n";
+        $output .= Button::createAccept(_('Starten'), 'start');
+        $output .= "</form>";
+        return $output;
+    }
+
+    /**
+    * get module-links for user
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function getUserModuleLinks()
+    {
+        return false;
+    }
+
+    /**
+    * get module-links for admin
+    *
+    * returns links to remove or add module to object
+    * @access public
+    * @return string html-code
+    */
+    function getAdminModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        $output .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">\n";
+        $output .= CSRFProtection::tokenTag();
+        $output .= "<input type=\"HIDDEN\" name=\"view\" value=\"" . htmlReady($view) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"search_key\" value=\"" . htmlReady($search_key) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"cms_select\" value=\"" . htmlReady($cms_select) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_type\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_id\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getId()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_system_type\" value=\"" . htmlReady($this->cms_type) . "\">\n";
+
+        if ($connected_cms[$this->cms_type]->content_module[$current_module]->isConnected())
+            $output .= "&nbsp;" . Button::create(_('Entfernen'), 'remove');
+        else
+            $output .= "&nbsp;" . Button::create(_('Hinzufügen'), 'add');
+        $output .= "</form>";
+
+        return $output;
+    }
+
+    /**
+    * get new module link
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function getNewModuleLink()
+    {
+        return false;
+    }
+
+    /**
+    * get start page link
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function getStartpageLink()
+    {
+        return false;
+    }
+}
+?>
diff --git a/lib/elearning/ConnectedPermissions.class.php b/lib/elearning/ConnectedPermissions.class.php
new file mode 100644
index 0000000..a2216b7
--- /dev/null
+++ b/lib/elearning/ConnectedPermissions.class.php
@@ -0,0 +1,57 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/**
+* class to handle access controls
+*
+* This class contains methods to handle permissions on connected objects.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ConnectedPermission
+* @package  ELearning-Interface
+*/
+class ConnectedPermissions
+{
+    var $cms_type;
+
+    var $db_class;
+    /**
+    * constructor
+    *
+    * init class. don't call directly, class is loaded by ConnectedCMS.
+    * @access public
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $connected_cms, $ELEARNING_INTERFACE_MODULES;
+
+        $this->cms_type = $cms;
+        if ($ELEARNING_INTERFACE_MODULES[$this->cms_type]["RELATIVE_PATH_DB_CLASSES"] != false)
+        {
+            require_once('lib/elearning/' . $ELEARNING_INTERFACE_MODULES[$this->cms_type]["RELATIVE_PATH_DB_CLASSES"]
+                . "/" . $ELEARNING_INTERFACE_MODULES[$this->cms_type]["db_classes"]["permissions"]["file"] );
+            $classname = $ELEARNING_INTERFACE_MODULES[$this->cms_type]["db_classes"]["permissions"]["classname"];
+            $this->db_class = new $classname();
+        }
+
+    }
+
+    /**
+    * get module-permissions
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @param string $module_id module-id
+    * @return boolean returns false
+    */
+    function getContentModulePerms($module_id)
+    {
+        return false;
+    }
+}
+?>
\ No newline at end of file
diff --git a/lib/elearning/ConnectedUser.class.php b/lib/elearning/ConnectedUser.class.php
new file mode 100644
index 0000000..9351955
--- /dev/null
+++ b/lib/elearning/ConnectedUser.class.php
@@ -0,0 +1,514 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+DEFINE ("USER_TYPE_ORIGINAL" , "1");
+DEFINE ("USER_TYPE_CREATED", "0");
+
+/**
+* class to handle user-accounts
+*
+* This class contains methods to handle connected user-accounts.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ConnectedUser
+* @package  ELearning-Interface
+*/
+class ConnectedUser
+{
+    var $cms_type;
+    var $id;
+    var $studip_id;
+    var $studip_login;
+    var $studip_password;
+    var $login;
+    var $external_password;
+    var $category;
+    var $gender;
+    var $title_front;
+    var $title_rear;
+    var $title;
+    var $firstname;
+    var $lastname;
+    var $institution;
+    var $department;
+    var $street;
+    var $city;
+    var $zipcode;
+    var $country;
+    var $phone_home;
+    var $fax;
+    var $matriculation;
+    var $email;
+    var $type;
+    var $is_connected;
+
+    var $db_class;
+    /**
+    * constructor
+    *
+    * init class. don't call directly, class is loaded by ConnectedCMS.
+    * @access public
+    * @param string $cms system-type
+    */
+    function __construct($cms, $user_id = false)
+    {
+        global $auth, $ELEARNING_INTERFACE_MODULES;
+
+        $this->studip_id = $user_id ? $user_id : $auth->auth["uid"];
+        $this->cms_type = $cms;
+
+        if ($ELEARNING_INTERFACE_MODULES[$this->cms_type]["RELATIVE_PATH_DB_CLASSES"] != false)
+        {
+            require_once("lib/elearning/" . $ELEARNING_INTERFACE_MODULES[$this->cms_type]["RELATIVE_PATH_DB_CLASSES"] . "/" . $ELEARNING_INTERFACE_MODULES[$this->cms_type]["db_classes"]["user"]["file"] );
+            $classname = $ELEARNING_INTERFACE_MODULES[$this->cms_type]["db_classes"]["user"]["classname"];
+            $this->db_class = new $classname();
+        }
+        $this->readData();
+        $this->getStudipUserData();
+    }
+
+    /**
+    * get data
+    *
+    * gets data from database
+    * @access public
+    * @return boolean returns false, if no data was found
+    */
+    function readData()
+    {
+        $query = "SELECT external_user_id, external_user_name, external_user_password, external_user_category, external_user_type
+                  FROM auth_extern
+                  WHERE studip_user_id = ? AND external_user_system_type = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$this->studip_id, $this->cms_type]);
+        $data = $statement->fetch(PDO::FETCH_ASSOC);
+
+        if (!$data) {
+            $this->id = '';
+            $this->is_connected = false;
+            return false;
+        }
+
+        $this->id                = $data['external_user_id'];
+        $this->login             = $data['external_user_name'];
+        $this->external_password = $data['external_user_password'];
+        $this->category          = $data['external_user_category'];
+        $this->type              = $data['external_user_type'];
+        $this->is_connected      = true;
+    }
+
+    /**
+    * get stud.ip-user-data
+    *
+    * gets stud.ip-user-data from database
+    * @access public
+    * @return boolean returns false, if no data was found
+    */
+    function getStudipUserData()
+    {
+        global $connected_cms;
+
+        $query = "SELECT username, password, title_front, title_rear, Vorname, 
+                         Nachname, Email, privatnr, privadr, geschlecht
+                  FROM auth_user_md5
+                  LEFT JOIN  user_info USING (user_id)
+                  WHERE user_id = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$this->studip_id]);
+        $data = $statement->fetch(PDO::FETCH_ASSOC);
+
+        if (!$data) {
+            return false;
+        }
+
+        $this->studip_login = $data['username'];
+        if ($this->is_connected == false) {
+            $this->login = $connected_cms[$this->cms_type]->getUserPrefix() . $this->studip_login;
+        }
+
+        $this->studip_password = $data['password'];
+        $this->title_front     = $data['title_front'];
+        $this->title_rear      = $data['title_rear'];
+        $this->firstname       = $data['Vorname'];
+        $this->lastname        = $data['Nachname'];
+        $this->email           = $data['Email'];
+        $this->phone_home      = $data['privatnr'];
+        $this->street          = $data['privadr'];
+        $this->gender          = ($data['geschlecht'] == 2 ? 'f' : 'm');
+
+        if ($this->title_front != '') {
+            $this->title = $this->title_front;
+        }
+        if ($this->title_front != '' && $this->title_rear != '') {
+            $this->title .= ' ';
+        }
+        if ($this->title_rear != '') {
+            $this->title .= $this->title_rear;
+        }
+        return true;
+    }
+
+    /**
+    * create new user-account
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function newUser()
+    {
+        return false;
+    }
+
+    /**
+    * update user-account
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function updateUser()
+    {
+        return false;
+    }
+
+    /**
+    * delete user-account
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function deleteUser()
+    {
+        return false;
+    }
+
+    /**
+    * get login-data of user-account
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function getLoginData($username)
+    {
+        return false;
+    }
+
+    /**
+    * get id
+    *
+    * returns id
+    * @access public
+    * @return string id
+    */
+    function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+    * get stud.ip user-id
+    *
+    * returns id
+    * @access public
+    * @return string stud.ip user-id
+    */
+    function getStudipId()
+    {
+        return $this->studip_id;
+    }
+
+    /**
+    * get username
+    *
+    * returns username
+    * @access public
+    * @return string username
+    */
+    function getUsername()
+    {
+        return $this->login;
+    }
+
+    /**
+    * set username
+    *
+    * sets username
+    * @access public
+    * @param string $user_login username
+    */
+    function setUsername($user_login)
+    {
+        $this->login = $user_login;
+    }
+
+    /**
+    * get password
+    *
+    * returns password
+    * @access public
+    * @return string password
+    */
+    function getPassword()
+    {
+        return $this->external_password;
+    }
+
+    /**
+    * set password
+    *
+    * sets password
+    * @access public
+    * @param string $user_password password
+    */
+    function setPassword($user_password)
+    {
+        $this->external_password = $user_password;
+    }
+
+    /**
+    * get user category
+    *
+    * returns id
+    * @access public
+    * @return string id
+    */
+    function getCategory()
+    {
+        return $this->category;
+    }
+
+    /**
+    * set user category
+    *
+    * sets user category
+    * @access public
+    * @param string $user_category category
+    */
+    function setCategory($user_category)
+    {
+        $this->category = $user_category;
+    }
+
+    /**
+    * get crypted password
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @return boolean returns false
+    */
+    function getCryptedPassword($password)
+    {
+        return false;
+    }
+
+    /**
+    * verify login data
+    *
+    * returns true, if login-data is valid
+    * @access public
+    * @param string $username username
+    * @param string $password password
+    * @return boolean login-validation
+    */
+    function verifyLogin($username, $password)
+    {
+        $this->getLoginData($username);
+        if (($username == "") OR ($password == ""))
+            return false;
+        if ( ($this->login == $username) AND  ($this->external_password == $this->getCryptedPassword($password) ) )
+            return true;
+        return false;
+    }
+
+    /**
+    * get gender
+    *
+    * returns gender-setting
+    * @access public
+    * @return string gender-setting
+    */
+    function getGender()
+    {
+        return $this->gender;
+    }
+
+    /**
+    * set gender
+    *
+    * sets gender
+    * @access public
+    * @param string $user_gender gender-setting
+    */
+    function setGender($user_gender)
+    {
+        $this->gender = $user_gender;
+    }
+
+    /**
+    * get full name
+    *
+    * returns full name
+    * @access public
+    * @return string name
+    */
+    function getName()
+    {
+        if ($this->title != "")
+            return $this->title . ' ' . $this->firstname . ' ' . $this->lastname;
+        else
+            return $this->firstname . ' ' . $this->lastname;
+    }
+
+    /**
+    * get firstname
+    *
+    * returns firstname
+    * @access public
+    * @return string firstname
+    */
+    function getFirstname()
+    {
+        return $this->firstname;
+    }
+
+    /**
+    * set firstname
+    *
+    * sets firstname
+    * @access public
+    * @param string $user_firstname firstname
+    */
+    function setFirstname($user_firstname)
+    {
+        $this->firstname = $user_firstname;
+    }
+
+    /**
+    * get lastname
+    *
+    * returns lastname
+    * @access public
+    * @return string lastname
+    */
+    function getLastname()
+    {
+        return $this->lastname;
+    }
+
+    /**
+    * set lastname
+    *
+    * sets lastname
+    * @access public
+    * @param string $user_lastname lastname
+    */
+    function setLastname($user_lastname)
+    {
+        $this->lastname = $user_lastname;
+    }
+
+    /**
+    * get email-adress
+    *
+    * returns email-adress
+    * @access public
+    * @return string email-adress
+    */
+    function getEmail()
+    {
+        return $this->email;
+    }
+
+    /**
+    * set email-adress
+    *
+    * sets email-adress
+    * @access public
+    * @param string $user_email email-adress
+    */
+    function setEmail($user_email)
+    {
+        $this->email = $user_email;
+    }
+
+    /**
+    * get user-type
+    *
+    * returns user-type
+    * @access public
+    * @return string user-type
+    */
+    function getUserType()
+    {
+        return $this->type;
+    }
+
+    /**
+    * set user-type
+    *
+    * sets user-type
+    * @access public
+    * @param string $user_type user-type
+    */
+    function setUserType($user_type)
+    {
+        $this->type = $user_type;
+    }
+
+    /**
+    * save connection for user-account
+    *
+    * saves user-connection to database and sets type for actual user
+    * @access public
+    * @param string $user_type user-type
+    */
+    function setConnection($user_type)
+    {
+        $this->setUserType($user_type);
+
+        $query = "INSERT INTO auth_extern (studip_user_id, external_user_id, external_user_name, 
+                                           external_user_password, external_user_category,
+                                           external_user_system_type, external_user_type)
+                  VALUES (?, ?, ?, ?, ?, ?, ?)
+                  ON DUPLICATE KEY
+                    UPDATE external_user_name = VALUES(external_user_name),
+                           external_user_password = VALUES(external_user_password),
+                           external_user_category = VALUES(external_user_category),
+                           external_user_id = VALUES(external_user_id),
+                           external_user_type = VALUES(external_user_type)";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([
+            (string)$this->studip_id,
+            (string)$this->id,
+            (string)$this->login,
+            (string)$this->external_password,
+            (string)$this->category,
+            (string)$this->cms_type,
+            (int)$this->type,
+        ]);
+
+        $this->is_connected = true;
+        $this->readData();
+    }
+
+    /**
+    * get connection-status
+    *
+    * returns true, if there is a connected user
+    * @access public
+    * @return boolean connection-status
+    */
+    function isConnected()
+    {
+        return $this->is_connected;
+    }
+}
+?>
diff --git a/lib/elearning/ContentModule.class.php b/lib/elearning/ContentModule.class.php
new file mode 100644
index 0000000..64ce29b
--- /dev/null
+++ b/lib/elearning/ContentModule.class.php
@@ -0,0 +1,383 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+* class to handle content module data
+*
+* This class contains methods to handle connected content module data.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ContentModule
+* @package  ELearning-Interface
+*/
+class ContentModule
+{
+    var $id;
+    var $title;
+    var $module_type;
+    var $module_type_name;
+    var $icon_file;
+    var $cms_type;
+    var $cms_name;
+    var $description;
+    var $authors;
+    var $is_connected;
+    var $is_dummy;
+    var $allowed_operations;
+
+    var $db_class;
+    var $view;
+    /**
+    * constructor
+    *
+    * init class. don't call directly, class is loaded by ConnectedCMS.
+    * @access public
+    * @param string $module_id module-id
+    * @param string $module_type module-type
+    * @param string $cms_type system-type
+    */
+    function __construct($module_id = "", $module_type, $cms_type)
+    {
+        global $connected_cms;
+
+        $this->is_dummy = false;
+        $this->setCMSType($cms_type);
+        $this->setModuleType($module_type);
+        if ($module_id != "")
+        {
+            $this->setId($module_id);
+
+            $this->readData();
+        }
+        $this->view = new ContentModuleView($this->cms_type);
+
+/**/    }
+
+/*  // Dummy-method. Must be overwritten by subclass.
+    function readData()
+    {
+        return false;
+    }
+*/
+
+    /**
+    * set id
+    *
+    * sets id
+    * @access public
+    * @param string $module_id id
+    */
+    function setId($module_id)
+    {
+        $this->id = $module_id;
+    }
+
+    /**
+    * get id
+    *
+    * returns id
+    * @access public
+    * @return string id
+    */
+    function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+    * set cms-type
+    *
+    * sets cms-type
+    * @access public
+    * @param string $module_cms_type cms-type
+    */
+    function setCMSType($module_cms_type)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+        $this->cms_type = $module_cms_type;
+        $this->cms_name = $ELEARNING_INTERFACE_MODULES[$module_cms_type]["name"];
+    }
+
+    /**
+    * get cms-type
+    *
+    * returns cms-type
+    * @access public
+    * @return string cms-type
+    */
+    function getCMSType()
+    {
+        return $this->cms_type;
+    }
+
+    /**
+    * get cms name
+    *
+    * returns cms name
+    * @access public
+    * @return string cms name
+    */
+    function getCMSName()
+    {
+        return $this->cms_name;
+    }
+
+    /**
+    * set module-type
+    *
+    * sets module-type
+    * @access public
+    * @param string $module_type module-type
+    */
+    function setModuleType($module_type)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+        $this->module_type = $module_type;
+        $this->module_type_name = $ELEARNING_INTERFACE_MODULES[$this->cms_type]["types"][$module_type]["name"];
+        $this->icon_file = $ELEARNING_INTERFACE_MODULES[$this->cms_type]["types"][$module_type]["icon"];
+    }
+
+    /**
+    * get module-type
+    *
+    * returns module-type
+    * @access public
+    * @return string module-type
+    */
+    function getModuleType()
+    {
+        return $this->module_type;
+    }
+
+    /**
+    * get module-type name
+    *
+    * returns module-type name
+    * @access public
+    * @return string module-type name
+    */
+    function getModuleTypeName()
+    {
+        return $this->module_type_name;
+    }
+
+    /**
+    * set title
+    *
+    * sets title
+    * @access public
+    * @param string $module_title title
+    */
+    function setTitle($module_title)
+    {
+        $this->title = $module_title;
+    }
+
+    /**
+    * get title
+    *
+    * returns title
+    * @access public
+    * @return string title
+    */
+    function getTitle()
+    {
+        return $this->title;
+    }
+
+    /**
+    * set description
+    *
+    * sets description
+    * @access public
+    * @param string $module_description description
+    */
+    function setDescription($module_description)
+    {
+        $this->description = $module_description;
+    }
+
+    /**
+    * get description
+    *
+    * returns description
+    * @access public
+    * @return string description
+    */
+    function getDescription()
+    {
+        return $this->description;
+    }
+
+    /**
+    * set authors
+    *
+    * sets authors
+    * @access public
+    * @param array $module_authors authors
+    */
+    function setAuthors($module_authors)
+    {
+        $this->authors = $module_authors;
+    }
+
+    /**
+    * get authors
+    *
+    * returns authors
+    * @access public
+    * @return array authors
+    */
+    function getAuthors()
+    {
+        return $this->authors;
+    }
+
+    /**
+    * set connection
+    *
+    * sets connection with seminar
+    * @access public
+    * @param string $seminar_id seminar-id
+    * @return boolean successful
+    */
+    function setConnection($seminar_id)
+    {
+        $this->is_connected = true;
+//      echo "$this->id, $this->module_type, $this->cms_type";
+        return ObjectConnections::setConnection($seminar_id, $this->id, $this->module_type, $this->cms_type);
+    }
+
+    /**
+    * unset connection
+    *
+    * unsets connection with seminar
+    * @access public
+    * @param string $seminar_id seminar-id
+    * @return boolean successful
+    */
+    function unsetConnection($seminar_id)
+    {
+        $this->is_connected = false;
+        return ObjectConnections::unsetConnection($seminar_id, $this->id, $this->module_type, $this->cms_type);
+    }
+
+    /**
+    * set connection-status
+    *
+    * sets connection-status
+    * @access public
+    * @param boolean $is_connected connection-status
+    */
+    function setConnectionType($is_connected)
+    {
+        $this->is_connected = $is_connected;
+    }
+
+    /**
+    * get connection-status
+    *
+    * returns true, if module is connected to seminar
+    * @access public
+    * @return boolean connection-status
+    */
+    function isConnected()
+    {
+        return $this->is_connected;
+    }
+
+    /**
+    * get reference string
+    *
+    * returns reference string for content-module
+    * @access public
+    * @return string reference string
+    */
+    function getReferenceString()
+    {
+        return $this->cms_type."_".$this->module_type."_".$this->id;
+    }
+
+    /**
+    * get icon-image
+    *
+    * returns icon-image
+    * @access public
+    * @return string icon-image
+    */
+    function getIcon()
+    {
+        if (!$this->icon_file) {
+            $this->icon_file = 'learnmodule';
+        }
+        if (mb_strpos('http', $this->icon_file) === 0) {
+            return "<img src=\"" . $this->icon_file . "\">";
+        } else {
+            return Icon::create($this->icon_file, 'inactive')->asImg();
+        }
+    }
+
+    /**
+    * get module-status
+    *
+    * returns true, if module is a dummy
+    * @access public
+    * @return boolean module-status
+    */
+    function isDummy()
+    {
+        return $this->is_dummy;
+    }
+
+    /**
+    * create module-dummy
+    *
+    * sets title and description of module to display error-message
+    * @access public
+    * @param string $error error-type
+    */
+    function createDummyForErrormessage($error = "unknown")
+    {
+        global $connected_cms;
+
+        switch($error)
+        {
+            case "no permission":
+                $this->setTitle(_("--- Keine Lese-Berechtigung! ---"));
+                $this->setDescription(sprintf(_("Sie haben im System \"%s\" keine Lese-Berechtigung für das Lernmodul, das dieser Veranstaltung / Einrichtung an dieser Stelle zugeordnet ist."), $this->getCMSName()));
+                break;
+            case "not found":
+                $this->setTitle(_("--- Dieses Content-Modul existiert nicht mehr im angebundenen System! ---"));
+                $this->setDescription(sprintf(_("Das Lernmodul, das dieser Veranstaltung / Einrichtung an dieser Stelle zugeordnet war, existiert nicht mehr. Dieser Fehler tritt auf, wenn das angebundene LCMS \"%s\" nicht erreichbar ist oder wenn das Lernmodul innerhalb des angebundenen Systems gelöscht wurde."), $this->getCMSName()));
+                break;
+            case "deleted":
+                $this->setTitle(_("--- Dieses Content-Modul wurde im angebundenen System gelöscht! ---"));
+                $this->setDescription(sprintf(_("Das Lernmodul, das dieser Veranstaltung / Einrichtung an dieser Stelle zugeordnet war, wurde gelöscht."), $this->getCMSName()));
+                break;
+            default:
+                $this->setTitle(_("--- Es ist ein unbekannter Fehler aufgetreten! ---"));
+                $this->setDescription(sprintf(_("Unbekannter Fehler beim Lernmodul mit der Referenz-ID \"%s\" im LCMS \"%s\""), $this->getId(), $this->getCMSName()));
+        }
+
+        $this->is_dummy = true;
+    }
+
+    /**
+    * ask for permission for given operation
+    *
+    * dummy-method. returns false. must be overwritten by subclass.
+    * @access public
+    * @param string $operation operation
+    * @return boolean returns false
+    */
+    function isAllowed($operation)
+    {
+        return false;
+    }
+}
+?>
diff --git a/lib/elearning/ContentModuleView.class.php b/lib/elearning/ContentModuleView.class.php
new file mode 100644
index 0000000..c351c1c
--- /dev/null
+++ b/lib/elearning/ContentModuleView.class.php
@@ -0,0 +1,189 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/**
+* class to show content-module data
+*
+* This class contains methods for output of connected module data.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ContentModuleView
+* @package  ELearning-Interface
+*/
+class ContentModuleView
+{
+    var $view_mode;
+    var $change_date;
+    var $module_new;
+    var $cms_type;
+    /**
+    * constructor
+    *
+    * init class. don't call directly, class is loaded by ContentModule.
+    * @access public
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $connected_cms;
+
+        $this->change_date = 0;
+        $this->module_new = false;
+        $this->cms_type = $cms;
+        $this->setViewMode("closed");
+    }
+
+    /**
+    * show module-data
+    *
+    * show module-data in printhead/printcontent-style. user-mode
+    * @access public
+    */
+    function show($mode = "")
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module, $anker_target;
+
+        $content_module = $connected_cms[$this->cms_type]->content_module[$current_module];
+
+        if ( (! $content_module->isDummy()) AND ($connected_cms[$this->cms_type]->isAuthNecessary() == true) AND ($connected_cms[$this->cms_type]->user->isConnected() == true)) {
+            if (! $content_module->isAllowed(OPERATION_VISIBLE)) {
+                return false;
+            }
+        }
+
+        if ($_SESSION['elearning_open_close'][$content_module->getReferenceString()] == true)
+            $this->setViewMode("open");
+        $module_title = $content_module->getTitle();
+/*/
+        if ($mode == "searchresult") {
+            $module_title = $module_title . " (ID " . $content_module->getId() . ", ";
+            if ($content_module->isAllowed(OPERATION_WRITE))
+                $module_title = $module_title . " " . _("Schreibzugriff") . ")";
+            else
+                $module_title = $module_title . " " . _("Lesezugriff") . ")";
+        }/**/
+        if ($this->isOpen() == true)
+            $module_link = URLHelper::getLink('?do_close='. $content_module->getReferenceString() . '&view='.$view.'&search_key='.$search_key.'&cms_select='.$cms_select.'#anker');
+        else
+            $module_link = URLHelper::getLink('?do_open='. $content_module->getReferenceString() . '&view='.$view.'&search_key='.$search_key.'&cms_select='.$cms_select.'#anker');
+        if (! $content_module->isDummy())
+            $module_buttons = $connected_cms[$this->cms_type]->link->getUserModuleLinks();
+        $template = $GLOBALS['template_factory']->open('elearning/_content_module.php');
+        $template->set_attribute('module_anker_target', ($anker_target == $content_module->getReferenceString()));
+        $template->set_attribute('module_link', $module_link);
+        $template->set_attribute('module_buttons', $module_buttons);
+        $template->set_attribute('module_authors', $content_module->getAuthors());
+        $template->set_attribute('module_title', $module_title);
+        $template->set_attribute('module_description', $content_module->getDescription());
+        $template->set_attribute('module_is_new', $this->module_new);
+        $template->set_attribute('module_chdate', $this->change_date);
+        $template->set_attribute('module_reference', $content_module->getReferenceString());
+        $template->set_attribute('module_source', $content_module->getCMSName() . " / " . $content_module->getModuleTypeName());
+        $template->set_attribute('module_icon', $content_module->getIcon());
+        $template->set_attribute('module_is_open', $this->isOpen());
+        return $template->render();
+    }
+
+    /**
+    * show module-data to admin
+    *
+    * show module-data in printhead/printcontent-style. admin-mode
+    * @access public
+    */
+    function showAdmin($mode = "")
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module, $anker_target;
+
+        $content_module = $connected_cms[$this->cms_type]->content_module[$current_module];
+
+        if ( (! $content_module->isDummy()) AND ($connected_cms[$this->cms_type]->isAuthNecessary() == true) AND ($connected_cms[$this->cms_type]->user->isConnected() == true)) {
+            if (! $content_module->isAllowed(OPERATION_VISIBLE)) {
+                return false;
+            }
+        }
+
+        if ($_SESSION['elearning_open_close'][$content_module->getReferenceString()] == true)
+            $this->setViewMode("open");
+
+        $module_title = $content_module->getTitle();
+        $module_title = $module_title . " (ID " . $content_module->getId();
+        if ($content_module->isAllowed(OPERATION_WRITE))
+            $module_title = $module_title . ", " . _("Schreibzugriff");
+        elseif ($content_module->isAllowed(OPERATION_READ))
+            $module_title = $module_title . ", " . _("Lesezugriff");
+        else
+            $module_title = $module_title . ", " . _("kein Lesezugriff");
+        $module_title = $module_title . ")";
+
+        if ($this->isOpen() == true)
+            $module_link = URLHelper::getLink('?do_close='. $content_module->getReferenceString() . '&view='.$view.'&search_key='.$search_key.'&cms_select='.$cms_select.'#anker');
+        else
+            $module_link = URLHelper::getLink('?do_open='. $content_module->getReferenceString() . '&view='.$view.'&search_key='.$search_key.'&cms_select='.$cms_select.'#anker');
+
+        $template = $GLOBALS['template_factory']->open('elearning/_content_module.php');
+        $template->set_attribute('module_anker_target', ($anker_target == $content_module->getReferenceString()));
+        $template->set_attribute('module_link', $module_link);
+        if ($content_module->isAllowed(OPERATION_READ))
+            $module_buttons = $connected_cms[$this->cms_type]->link->getAdminModuleLinks();
+        $template->set_attribute('module_buttons', $module_buttons);
+        $template->set_attribute('module_authors', $content_module->getAuthors());
+        $template->set_attribute('module_title', $module_title);
+        $template->set_attribute('module_description', $content_module->getDescription());
+        $template->set_attribute('module_is_new', $this->module_new);
+        $template->set_attribute('module_chdate', $this->change_date);
+        $template->set_attribute('module_reference', $content_module->getReferenceString());
+        $template->set_attribute('module_source', $content_module->getCMSName() . " / " . $content_module->getModuleTypeName());
+        $template->set_attribute('module_icon', $content_module->getIcon());
+        $template->set_attribute('module_is_open', $this->isOpen());
+        return $template->render();
+    }
+
+    /**
+    * get open-status
+    *
+    * returns true, if module is opened
+    * @access public
+    * @return boolean open-status
+    */
+    function isOpen()
+    {
+        if ($this->view_mode == "open")
+            return true;
+        else
+            return false;
+    }
+
+    /**
+    * set view-mode
+    *
+    * sets view-mode
+    * @access public
+    * @param boolean $module_mode view-mode
+    */
+    function setViewMode($module_mode)
+    {
+        $this->view_mode = $module_mode;
+    }
+
+    /**
+    * set changedate
+    *
+    * sets changedate for view
+    * @access public
+    * @param string $module_chdate changedate
+    */
+    function setChangeDate($module_chdate)
+    {
+        $this->change_date = $module_chdate;
+
+        if (object_get_visit(Context::getId(), "elearning_interface") < $this->change_date)
+            $this->module_new = true;
+        else
+            $this->module_new = false;
+    }
+}
+?>
diff --git a/lib/elearning/ELearningUtils.class.php b/lib/elearning/ELearningUtils.class.php
new file mode 100644
index 0000000..86dd037
--- /dev/null
+++ b/lib/elearning/ELearningUtils.class.php
@@ -0,0 +1,614 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/**
+* class with several forms and tools for the elearning interface
+*
+* This class contains Utilities for the elearning-interface.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @package  ELearning-Interface
+*/
+
+use Studip\Button, Studip\LinkButton;
+
+class ELearningUtils
+{
+    /**
+     * loads class ConnectedCMS for given system-type and creates an instance
+     *
+     * @param string $cms system-type
+     */
+    public static function loadClass($cms)
+    {
+        global $connected_cms, $ELEARNING_INTERFACE_MODULES;
+
+        if (!is_object($connected_cms[$cms])) {
+            require_once "lib/elearning/{$ELEARNING_INTERFACE_MODULES[$cms]['CLASS_PREFIX']}ConnectedCMS.class.php";
+            $classname = "{$ELEARNING_INTERFACE_MODULES[$cms]['CLASS_PREFIX']}ConnectedCMS";
+            $connected_cms[$cms] = new $classname($cms);
+            $connected_cms[$cms]->initSubclasses();
+        }
+    }
+
+    public static function initElearningInterfaces()
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        if (is_array($ELEARNING_INTERFACE_MODULES)) {
+            foreach (array_keys($ELEARNING_INTERFACE_MODULES) as $cms) {
+                if (self::isCMSActive($cms)) {
+                    self::loadClass($cms);
+                }
+            }
+        }
+        return is_array($connected_cms) ? count($connected_cms) : false;
+    }
+
+    /**
+     * gets config-value with given name from globals
+     *
+     * @param string $name entry-name
+     * @param string $cms system-type
+     * @return boolean returns false if no cms is given
+     */
+    public static function getConfigValue($name, $cms)
+    {
+        if (!$cms) {
+            return false;
+        }
+        return Config::get()->getValue("ELEARNING_INTERFACE_{$cms}_{$name}");
+    }
+
+    /**
+     * set config-value
+     *
+     * writes config-value with given name and value to database
+     *
+     * @param string $name entry-name
+     * @param string $value value
+     * @param string $cms system-type
+     */
+    public static function setConfigValue($name, $value, $cms)
+    {
+        if (!$cms) {
+            return;
+        }
+
+        try {
+            Config::get()->store("ELEARNING_INTERFACE_{$cms}_{$name}", $value);
+        } catch (InvalidArgumentException $e) {
+            Config::get()->create("ELEARNING_INTERFACE_{$cms}_{$name}", [
+                'value' => $value,
+                'type'  => 'string',
+            ]);
+        }
+    }
+
+    /**
+     * check cms-status
+     *
+     * checks if connected content-management-system is activated
+     *
+     * @param string $cms system-type
+     */
+    public static function isCMSActive($cms)
+    {
+        return self::getConfigValue('ACTIVE', $cms);
+    }
+
+    /**
+     * get cms-selectbox
+     *
+     * returns a form to select a cms
+     *
+     * @param string $message description-text
+     * @param boolean $check_active show only activated systems
+     * @return string returns html-code
+     */
+    public static function getCMSSelectbox($message, $check_active = true)
+    {
+        global $ELEARNING_INTERFACE_MODULES, $cms_select, $search_key, $view;
+        if (!is_array($ELEARNING_INTERFACE_MODULES)) {
+            $msg = sprintf(_("Die ELearning-Schnittstelle ist nicht korrekt konfiguriert. Die Variable \"%s\" "
+                            ."muss in der Konfigurationsdatei von Stud.IP erst mit den Verbindungsdaten angebundener "
+                            ."Learning-Content-Management-Systeme aufgefüllt werden. Solange dies nicht geschehen "
+                            ."ist, setzen Sie die Variable \"%s\" auf FALSE!"), "\$ELEARNING_INTERFACE_MODULES", "\$ELEARNING_INTERFACE_ENABLE");
+            PageLayout::postError($msg);
+            return false;
+        }
+        $options = [];
+        foreach ($ELEARNING_INTERFACE_MODULES as $cms => $cms_preferences) {
+            if (!$check_active || self::isCMSActive($cms)) {
+                $options[$cms] = $cms_preferences['name'];
+            }
+        }
+        $template = $GLOBALS['template_factory']->open('elearning/_cms_selectbox.php');
+        $template->cms_select = $cms_select;
+        $template->options    = $options;
+        $template->search_key = $search_key;
+        $template->view       = $view;
+        $template->message    = $message;
+        return $template->render();
+    }
+
+     /**
+     * get moduletype-selectbox
+     *
+     * returns a form to select type for new contentmodule
+     *
+     * @param string $cms system-type
+     * @return string returns html-code
+     */
+    public static function getTypeSelectbox($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+        $options = [];
+        foreach ($ELEARNING_INTERFACE_MODULES[$cms]['types'] as $type => $info) {
+            $options[$type] = $info['name'];
+            if (Request::get("module_type_{$cms}") === $type) {
+                $selected = $type;
+            }
+        }
+        $template = $GLOBALS['template_factory']->open('elearning/_type_selectbox.php');
+        $template->options  = $options;
+        $template->selected = $selected;
+        $template->cms      = $cms;
+        return $template->render();
+    }
+
+    /**
+    * get searchfield
+    *
+    * returns a form to search for modules
+    *
+    * @param string $message description-text
+    * @return string returns html-code
+    */
+    public static function getSearchfield($message)
+    {
+        global $cms_select, $search_key, $view;
+        $template = $GLOBALS['template_factory']->open('elearning/_searchfield.php');
+        $template->cms_select = $cms_select;
+        $template->search_key = $search_key;
+        $template->view       = $view;
+        $template->message    = $message;
+        return $template->render();
+    }
+
+    /**
+    * get form for new content-module
+    *
+    * returns a form to choose module-type and to create a new content-module
+    *
+    * @param string $cms system-type
+    * @return string returns html-code
+    */
+    public static function getNewModuleForm($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        if (sizeof($ELEARNING_INTERFACE_MODULES[$cms]["types"]) == 1)
+            foreach($ELEARNING_INTERFACE_MODULES[$cms]["types"] as $type => $info)
+                Request::set("module_type_" . $cms, $type);
+        $link = $connected_cms[$cms]->link->getNewModuleLink();
+
+        if ($link == false)
+            return false;
+        $types = [];
+        $cms_types = [];
+        foreach ($ELEARNING_INTERFACE_MODULES as $cms_type => $cms_data)
+            $cms_types["module_type_" . $cms_type] = Request::option("module_type_" . $cms_type);
+        $template = $GLOBALS['template_factory']->open('elearning/_new_module_form.php');
+        $template->set_attribute('link', $link);
+        $template->set_attribute('cms', $cms);
+        $template->set_attribute('cms_types', $cms_types);
+        $template->set_attribute('types', $ELEARNING_INTERFACE_MODULES[$cms]["types"]);
+        return $template->render();
+    }
+
+    /**
+    * get form for external user-account
+    *
+    * returns a form for administration of external user-account
+    *
+    * @param string message message-string
+    * @param string my_account_cms cms-type
+    * @return string returns html-code
+    */
+    public static function getMyAccountForm($message, $my_account_cms)
+    {
+        global $connected_cms;
+        $template = $GLOBALS['template_factory']->open('elearning/_my_account_form.php');
+        if ($connected_cms[$my_account_cms]->user->isConnected()) {
+            $template->set_attribute('login', $connected_cms[$my_account_cms]->user->getUsername());
+            $template->set_attribute('is_connected', 1);
+        }
+        $template->set_attribute('my_account_cms', $my_account_cms);
+        $template->set_attribute('search_key', $search_key);
+        $template->set_attribute('view', $view);
+        $template->set_attribute('message', $message);
+        return $template->render();
+    }
+
+    /**
+    * get form for new user
+    *
+    * returns a form to add a user-account to connected cms
+    *
+    * @param string $new_account_cms system-type
+    * @return string returns html-code
+    */
+    public static function getNewAccountForm(&$new_account_cms)
+    {
+        global $connected_cms, $cms_select, $view, $current_module, $messages,
+             $ELEARNING_INTERFACE_MODULES;
+
+        $new_account_step = Request::int('new_account_step');
+        $ext_password = Request::get('ext_password');
+        $ext_password_2 = Request::get('ext_password_2');
+        $ext_username = Request::get('ext_username');
+        $ref_id = Request::get('ref_id');
+        $module_type = Request::get('module_type');
+
+        self::loadClass($new_account_cms);
+
+        //Password was sent, but is to short
+        if (isset($ext_password_2) && !Request::submitted('go_back') && Request::submitted('next') && mb_strlen($ext_password_2) < 6) {
+            PageLayout::postError(_('Das Passwort muss mindestens 6 Zeichen lang sein!'));
+            $new_account_step--;
+        } elseif (isset($ext_password_2) && ! Request::submitted('go_back') && Request::submitted('next') && $ext_password != $ext_password_2) {
+            //Passwords doesn't match password repeat
+            PageLayout::postError(_('Das Passwort entspricht nicht der Passwort-Wiederholung!'));
+            $new_account_step--;
+        }
+
+        // Benutzername was sent
+        if ($ext_username && !Request::submitted('go_back') && Request::submitted('assign')) {
+            $caching_status = $connected_cms[$new_account_cms]->soap_client->getCachingStatus();
+            $connected_cms[$new_account_cms]->soap_client->setCachingStatus(false);
+            if ($connected_cms[$new_account_cms]->user->verifyLogin($ext_username, $ext_password)) {
+                $is_verified = true;
+                PageLayout::postInfo(_('Der Account wurde zugeordnet.'));
+                $connected_cms[$new_account_cms]->user->setCategory("");
+                $connected_cms[$new_account_cms]->user->setUsername($ext_username);
+                $connected_cms[$new_account_cms]->user->setPassword($ext_password);
+                $connected_cms[$new_account_cms]->user->setConnection(USER_TYPE_ORIGINAL);
+                if ($ref_id) {
+                    $connected_cms[$new_account_cms]->newContentModule($ref_id, $module_type, true);
+                    $module_title = $connected_cms[$new_account_cms]->content_module[$current_module]->getTitle();
+                    $module_links = $connected_cms[$new_account_cms]->link->getUserModuleLinks();
+                }
+            } else {
+                $new_account_step = 1;
+                PageLayout::postError(_('Die eingegebenen Login-Daten sind nicht korrekt.'));
+            }
+            $connected_cms[$new_account_cms]->soap_client->setCachingStatus($caching_status);
+        }
+
+        if (Request::submitted('start')) {
+            $new_account_step = 1;
+        }
+        if (Request::submitted('go_back')) {
+            $new_account_step--;
+            if ($new_account_step < 1) {
+                $new_account_cms = '';
+                return false;
+            }
+        } elseif (Request::submitted('next') || Request::submitted('assign')) {
+            $new_account_step++;
+        }
+
+        if ($new_account_step == 2 && Request::submitted('assign')) {
+            // Assign existing Account
+            $step = 'assign';
+        } elseif ($new_account_step == 2 && Request::submitted('next')) {
+            // Create new Account: ask for new password
+            $step = 'new_account';
+        } elseif ($new_account_step == 3 && Request::submitted('next')) {
+            // Create new Account
+            $connected_cms[$new_account_cms]->user->setPassword($ext_password);
+            if ($connected_cms[$new_account_cms]->user->newUser()) {
+                $is_verified = true;
+                PageLayout::postInfo(sprintf(_("Der Account wurde erzeugt und zugeordnet. Ihr Loginname ist %s."), "<b>" . htmlReady($connected_cms[$new_account_cms]->user->getUsername()) . "</b>"));
+                if ($ref_id) {
+                    $connected_cms[$new_account_cms]->newContentModule($ref_id, $module_type, true);
+                    $module_title = $connected_cms[$new_account_cms]->content_module[$current_module]->getTitle();
+                    $module_links = $connected_cms[$new_account_cms]->link->getUserModuleLinks();
+                }
+            }
+        } elseif (!$is_verified) {
+            $output .= '<font size="-1">';
+            if (Request::submitted('start')) {
+                $messages["info"] = sprintf(_("Sie versuchen zum erstem Mal ein Lernmodul des angebundenen Systems %s zu starten. Bevor Sie das Modul nutzen können, muss Ihrem Stud.IP-Benutzeraccount ein Account im angebundenen System zugeordnet werden."), htmlReady($connected_cms[$new_account_cms]->getName())) . "<br><br>\n\n";
+            }
+        }
+        $template = $GLOBALS['template_factory']->open('elearning/_new_account_form.php');
+        $template->cms_title        = htmlReady($connected_cms[$new_account_cms]->getName());
+        $template->cms_select       = $cms_select;
+        $template->module_title     = $module_title;
+        $template->module_links     = $module_links;
+        $template->module_type      = $module_type;
+        $template->ref_id           = $ref_id;
+        $template->ext_username     = $ext_username;
+        $template->new_account_cms  = $new_account_cms;
+        $template->new_account_step = $new_account_step;
+        $template->is_connected     = $connected_cms[$new_account_cms]->user->isConnected();
+        $template->is_verified      = $is_verified;
+        $template->step             = $step;
+
+        // TODO: Should this really be below the assignment?
+        if ($is_verified) {
+            $new_account_cms = "";
+        }
+
+        return $template->render();
+    }
+
+    /**
+     * get table-header for connected cms
+     *
+     * returns a table-header for connected cms
+     *
+     * @param string $title table-title
+     * @return string returns html-code
+     */
+    public static function getCMSHeader($title)
+    {
+        $template = $GLOBALS['template_factory']->open('elearning/_cms_header.php');
+        $template->title = $title;
+        return $template->render();
+    }
+
+    /**
+     * get table-footer for connected cms
+     *
+     * returns a table-footer for connected cms
+     *
+     * @param string $logo system-logo
+     * @return string returns html-code
+     */
+    public static function getCMSFooter($logo)
+    {
+        $template = $GLOBALS['template_factory']->open('elearning/_cms_footer.php');
+        $template->logo = $logo;
+        return $template->render();
+    }
+
+    /**
+     * get headline for modules
+     *
+     * returns a table with a headline
+     *
+     * @param string $title headline
+     * @return string returns html-code
+     */
+    public static function getModuleHeader($title)
+    {
+        global $view, $cms_select, $search_key;
+        $template = $GLOBALS['template_factory']->open('elearning/_module_header.php');
+        $template->title      = $title;
+        $template->view       = $view;
+        $template->cms_select = $cms_select;
+        $template->search_key = $search_key;
+        $template->all_open   = $_SESSION['elearning_open_close']['all open'];
+        return $template->render();
+    }
+
+    /**
+    * get Headline
+    *
+    * returns a table with a headline
+    *
+    * @param string $title headline
+    * @return string returns html-code
+    */
+    public static function getHeader($title)
+    {
+        $template = $GLOBALS['template_factory']->open('elearning/_header.php');
+        $template->title = $title;
+        return $template->render();
+    }
+
+    /**
+     * save timestamp
+     *
+     * saves a timestamp for debugging and performance-check
+     *
+     * @param string $stri description
+     */
+    public static function bench($stri)
+    {
+        $GLOBALS['timearray'][] = [
+            'zeit' => microtime(true),
+            'name' => $stri,
+        ];
+    }
+
+    /**
+     * show benchmark
+     *
+     * shows saved timestamps with descriptions
+     *
+     * @param string $stri description
+     */
+    public static function showbench()
+    {
+        global $timearray;
+        echo "<table><tr><td>Zeit (".$timearray[0]["name"].")</td><td align=\"right\"></td></tr>";
+        for ($i = 0; $i < count($timearray); $i++) {
+            echo "<tr><td>".$timearray[$i]["name"].": </td><td align=\"right\">" . number_format(($timearray[$i]["zeit"]-$timearray[$i-1]["zeit"])*1000,2) . " msek</td></tr>";
+        }
+        echo "<tr><td>Gesamtzeit: </td><td align=\"right\">" . number_format(($timearray[$i-1]["zeit"]-$timearray[0]["zeit"])*1000,2)." msek</td></tr></table>";
+    }
+
+    /**
+     * delete cms-data
+     *
+     * deletes all data belonging to the specified cms from stud.ip database
+     *
+     * @return boolean successful
+     */
+    public static function deleteCMSData($cms_type)
+    {
+        $db = DBManager::get();
+        $db->execute("DELETE FROM auth_extern WHERE external_user_system_type = ?", [$cms_type]);
+        $db->execute("DELETE FROM object_contentmodules WHERE system_type = ?", [$cms_type]);
+
+        $config = Config::get();
+        foreach ($config->getFields('global' ,null , "ELEARNING_INTERFACE_{$cms_type}") as $key) {
+            $config->delete($key);
+        }
+    }
+
+    /**
+     * get ilias courses
+     *
+     * creates output of ilias courses linked to the chosen seminar. also updates object-connections.
+     *
+     * @return boolean successful
+     */
+    public static function getIliasCourses($sem_id)
+    {
+        global  $connected_cms, $messages, $view, $cms_select;
+        $db = DBManager::get();
+
+        $rs = $db->query("SELECT DISTINCT system_type, module_id
+                          FROM object_contentmodules
+                          WHERE module_type = 'crs' AND object_id = " . $db->quote($sem_id))
+                        ->fetchAll(PDO::FETCH_ASSOC);
+        foreach ($rs as $row) $courses[$row['system_type']] = $row['module_id'];
+        if (is_array($courses))
+            foreach($courses as $system_type => $crs_id)
+                if (self::isCMSActive($system_type)) {
+                    self::loadClass($system_type);
+                    $connected_courses['courses'][$system_type] = [
+                        'url' => UrlHelper::getLink($connected_cms[$system_type]->link->cms_link . '?client_id=' . $connected_cms[$system_type]->getClientId() . '&cms_select=' . $system_type . '&ref_id=' . $crs_id . '&type=crs&target=start'),
+                        'cms_name' => $connected_cms[$system_type]->getName()];
+                    $course_output[] = "<a href=\"" . UrlHelper::getLink($connected_cms[$system_type]->link->cms_link . "?" . "client_id=" . $connected_cms[$system_type]->getClientId() . "&cms_select=" . $system_type . "&ref_id=" . $crs_id . "&type=crs&target=start") . "\" target=\"_blank\" rel=\"noopener noreferrer\">".sprintf(_("Kurs in %s"), htmlReady($connected_cms[$system_type]->getName()))."</a>";
+                    // gegebenenfalls zugeordnete Module aktualisieren
+                    if (Request::option('update')) {
+                        if ((method_exists($connected_cms[$system_type], "updateConnections"))) {
+                            $connected_cms[$system_type]->updateConnections( $crs_id );
+                        }
+                    }
+                    if (method_exists($connected_cms[$system_type]->permissions, 'CheckUserPermissions')) {
+                        $connected_cms[$system_type]->permissions->CheckUserPermissions($crs_id);
+                    }
+                }
+
+        if ($connected_courses['courses']) {
+            if (count($connected_courses['courses']) > 1)
+                $connected_courses['text'] = _("Diese Veranstaltung ist mit folgenden Ilias-Kursen verknüpft. Hier gelangen Sie direkt in den jeweiligen Kurs: ");
+            else
+                $connected_courses['text'] = _("Diese Veranstaltung ist mit einem Ilias-Kurs verknüpft. Hier gelangen Sie direkt in den Kurs: ");
+            $output["update"] .= _("Hier können Sie die Zuordnungen zu den verknüpften Kursen aktualisieren."). "<br>";
+            $output["update"] .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "#anker\">\n";
+            $output["update"] .= CSRFProtection::tokenTag();
+            $output["update"] .= "<input type=\"HIDDEN\" name=\"view\" value=\"" . htmlReady($view) . "\">\n";
+            $output["update"] .= "<input type=\"HIDDEN\" name=\"cms_select\" value=\"" . htmlReady($cms_select) . "\">\n";
+            $output["update"] .= Button::create(_('Aktualisieren'), 'update');
+            $output["update"] .= "</form>";
+        }
+
+        return $connected_courses;
+    }
+
+    /**
+    * check db-integrity
+    *
+    * checks if there are broken links in the database
+    *
+    * @return boolean successful
+    */
+    public static function checkIntegrity()
+    {
+        global $ELEARNING_INTERFACE_MODULES, $messages;
+        $db = DBManager::get();
+
+        foreach ($ELEARNING_INTERFACE_MODULES as $cms_type =>$data) $cmsystems[$cms_type] = [];
+
+        $config = Config::get();
+        foreach ($config->getFields('global' ,null , 'ELEARNING_INTERFACE_') as $key) {
+            $parts = explode("_", $key);
+            $cmsystems[$parts[2]]["config"]++;
+        }
+
+        $rs = $db->query("SELECT external_user_system_type, COUNT(*) as c FROM auth_extern GROUP BY external_user_system_type");
+        while ($row = $rs->fetch())
+            $cmsystems[$row["external_user_system_type"]]["accounts"] = $row['c'];
+        $rs = $db->query("SELECT system_type, COUNT(*) FROM object_contentmodules GROUP BY system_type");
+        while ($row = $rs->fetch())
+            $cmsystems[$row["system_type"]]["modules"] = $row['c'];
+
+        if (Request::submitted('delete')) {
+            $messages["info"] .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">";
+            $messages["info"] .= CSRFProtection::tokenTag();
+            $messages["info"] .= "<table>";
+            $messages["info"] .= "<tr><td>&nbsp;</td></tr>";
+            $messages["info"] .= "<tr><td>" . sprintf(_("Durch das Löschen der Daten zum System mit dem Index \"%s\" werden %s Konfigurationseinträge und Verknüpfungen von Stud.IP-Veranstaltungen und -User-Accounts unwiederbringlich aus der Stud.IP-Datenbank entfernt. Wollen Sie diese Daten jetzt löschen?"), Request::quoted('delete_cms'), $cmsystems[Request::quoted('delete_cms')]["accounts"]+$cmsystems[Request::quoted('delete_cms')]["modules"]+$cmsystems[Request::quoted('delete_cms')]["config"] ) . "</td></tr>";
+            $messages["info"] .= "<tr><td align=\"center\"><input type=\"hidden\" name=\"delete_cms\" value=\"".Request::quoted('delete_cms')."\">";
+            $messages["info"] .= '<div class="button-group">' . Button::create(_('Alle löschen'), 'confirm_delete') . Button::createCancel(_('Abbrechen'), 'abbruch') . '<div></td></tr>';
+            $messages["info"] .= "<tr><td align=\"center\"></td></tr>";
+            $messages["info"] .= "</table>";
+            $messages["info"] .= "</form>";
+        }
+
+        if (Request::submitted('confirm_delete')) {
+            unset($cmsystems[Request::quoted('delete_cms')]);
+//          deleteCMSData(Request::quoted('delete_cms'));
+            $messages["info"] .= _("Daten wurden gelöscht.");
+        }
+
+        foreach ($cmsystems as $cms_type =>$data) {
+            if ($ELEARNING_INTERFACE_MODULES[$cms_type]) {
+                $output .= self::getCMSHeader($ELEARNING_INTERFACE_MODULES[$cms_type]["name"]);
+                $output .= "<table>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                if (self::isCMSActive($cms_type)) {
+                    $output .= "<tr><td>" .  Icon::create('checkbox-checked', 'clickable')->asImg(['class' => 'text-top']) . "</td><td><b>". sprintf(_("Die Schnittstelle zum System %s ist aktiv."), $ELEARNING_INTERFACE_MODULES[$cms_type]["name"]) . "</b></td></tr>";
+                    $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                }
+                elseif ($data["config"] < 1)
+                    $output .= "<tr><td>" .  Icon::create('checkbox-unchecked', 'clickable')->asImg(['class' => 'text-top']) . "</td><td><i>". sprintf(_("Die Schnittstelle für das System %s wurde noch nicht eingerichtet."), $ELEARNING_INTERFACE_MODULES[$cms_type]["name"]) . "</i></td></tr>";
+                elseif ($data["config"] < 1)
+                    $output .= "<tr><td>" .  Icon::create('checkbox-unchecked', 'clickable')->asImg(['class' => 'text-top']) . "</td><td><i>". sprintf(_("Die Schnittstelle wurde noch nicht aktiviert."), $ELEARNING_INTERFACE_MODULES[$cms_type]["name"]) . "</i></td></tr>";
+
+                if ($data["accounts"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Stud.IP-User-Accounts sind mit Accounts im System %s verknüpft."), $data["accounts"], $ELEARNING_INTERFACE_MODULES[$cms_type]["name"]) . "</td></tr>";
+                if ($data["modules"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Objekte sind Stud.IP-Veranstaltungen oder -Einrichtungen zugeordnet."), $data["modules"]) . "</td></tr>";
+                if ($data["config"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Einträge in der config-Tabelle der Stud.IP-Datenbank."), $data["config"]) . "</td></tr>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                $output .= "</table>";
+                $output .= self::getCMSFooter(($ELEARNING_INTERFACE_MODULES[$cms_type]["logo_file"] ? "<img src=\"".$ELEARNING_INTERFACE_MODULES[$cms_type]["logo_file"]."\" border=\"0\">" : $cms_type));
+            }
+            else {
+                $output .= self::getCMSHeader("<font color=FF0000> Unbekanntes System: " . $cms_type . "</font>");
+                $output .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">";
+                $output .= CSRFProtection::tokenTag();
+                $output .= "<table>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                $output .= "<tr><td>" . Icon::create('decline', 'attention')->asImg(['class' => 'text-top']) . "</td><td><i>".sprintf(_("Für das System mit dem Index \"%s\" existieren keine Voreinstellungen in den Konfigurationsdateien mehr."), $cms_type) . "</i></td></tr>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                $output .= "<tr><td colspan=\"2\"><b>". _("In der Stud.IP-Datenbank sind noch folgende Informationen zu diesem System gespeichert:") . "</b></td></tr>";
+                if ($data["accounts"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Stud.IP-User-Accounts sind mit externen Accounts mit dem Index \"%s\" verknüpft."), $data["accounts"], $cms_type) . "</td></tr>";
+                if ($data["modules"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Objekte sind Stud.IP-Veranstaltungen oder -Einrichtungen zugeordnet."), $data["modules"]) . "</td></tr>";
+                if ($data["config"])
+                    $output .= "<tr><td colspan=\"2\">". sprintf(_("%s Einträge in der config-Tabelle der Stud.IP-Datenbank."), $data["config"]) . "</td></tr>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                $output .= "<tr><td align=\"center\" colspan=\"2\"><input type=\"hidden\" name=\"delete_cms\" value=\"".$cms_type."\">" . Button::create(_('Löschen'), 'delete') . "</td></tr>";
+                $output .= "<tr><td colspan=\"2\">&nbsp;</td></tr>";
+                $output .= "</table>";
+                $output .= "</form>";
+                $output .= self::getCMSFooter('');
+            }
+            $output .= "<br>";
+        }
+
+        return $output;
+    }
+}
diff --git a/lib/elearning/Ilias3ConnectedCMS.class.php b/lib/elearning/Ilias3ConnectedCMS.class.php
new file mode 100644
index 0000000..83e6921
--- /dev/null
+++ b/lib/elearning/Ilias3ConnectedCMS.class.php
@@ -0,0 +1,362 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+use Studip\Button, Studip\LinkButton;
+
+/**
+* main-class for connection to ILIAS 3
+*
+* This class contains the main methods of the elearning-interface to connect to ILIAS 3. Extends ConnectedCMS.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3ConnectedCMS
+* @package  ELearning-Interface
+*/
+class Ilias3ConnectedCMS extends ConnectedCMS
+{
+    var $client_id;
+//  var $root_user_id;
+    var $root_user_sid;
+    var $main_category_node_id;
+    var $user_role_template_id;
+    var $user_skin;
+    var $user_style;
+    var $crs_roles;
+    var $global_roles;
+
+    var $db_class_object;
+    var $db_class_tree;
+    var $db_class_course;
+
+    var $soap_client;
+    /**
+    * constructor
+    *
+    * init class.
+    * @access public
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+
+        parent::__construct($cms);
+
+        require_once($this->CLASS_PREFIX . "Soap.class.php");
+        $classname = $this->CLASS_PREFIX . "Soap";
+        $this->soap_client = new $classname($this->cms_type);
+        $this->soap_client->setCachingStatus(true);
+
+        $this->main_category_node_id = ELearningUtils::getConfigValue("category_id", $cms);
+
+        if ((ELearningUtils::getConfigValue("user_role_template_id", $cms) == "") AND ($GLOBALS["role_template_name"] == ""))
+            $GLOBALS["role_template_name"] = "Author";
+        $this->user_role_template_id = ELearningUtils::getConfigValue("user_role_template_id", $cms);
+        $this->user_skin = ELearningUtils::getConfigValue("user_skin", $cms);
+        $this->user_style = ELearningUtils::getConfigValue("user_style", $cms);
+        $this->encrypt_passwords = ELearningUtils::getConfigValue("encrypt_passwords", $cms);
+
+        $this->crs_roles = $ELEARNING_INTERFACE_MODULES[$cms]["crs_roles"];
+        $this->client_id = $ELEARNING_INTERFACE_MODULES[$cms]["soap_data"]["client"];
+        $this->global_roles = $ELEARNING_INTERFACE_MODULES[$cms]["global_roles"];
+//      $this->root_user_sid = $this->soap_client->login();
+        $this->is_first_call = true;
+    }
+
+    /**
+    * get preferences
+    *
+    * shows additional settings.
+    * @access public
+    */
+    function getPreferences()
+    {
+        global $connected_cms;
+
+        $role_template_name = Request::get('role_template_name');
+        $cat_name = Request::get('cat_name');
+        $style_setting = Request::option('style_setting');
+        $encrypt_passwords = Request::option('encrypt_passwords');
+
+        $this->soap_client->setCachingStatus(false);
+
+        if ($cat_name != "")
+        {
+            $cat = $this->soap_client->getReferenceByTitle( trim( $cat_name ), "cat");
+            if ($cat == false)
+                $messages["error"] .= sprintf(_("Das Objekt mit dem Namen \"%s\" wurde im System %s nicht gefunden."), htmlReady($cat_name), htmlReady($this->getName())) . "<br>\n";
+            if ($cat != "")
+            {
+                ELearningUtils::setConfigValue("category_id", $cat, $this->cms_type);
+                $this->main_category_node_id = $cat;
+            }
+        }
+
+        if ($role_template_name != "")
+        {
+            $role_template = $this->soap_client->getObjectByTitle( trim( $role_template_name ), "rolt" );
+            if ($role_template == false)
+                $messages["error"] .= sprintf(_("Das Rollen-Template mit dem Namen \"%s\" wurde im System %s nicht gefunden."), htmlReady($role_template_name), htmlReady($this->getName())) . "<br>\n";
+            if (is_array($role_template))
+            {
+                ELearningUtils::setConfigValue("user_role_template_id", $role_template["obj_id"], $this->cms_type);
+                ELearningUtils::setConfigValue("user_role_template_name", $role_template["title"], $this->cms_type);
+                $this->user_role_template_id = $role_template["obj_id"];
+            }
+        }
+
+        if (Request::submitted('submit'))
+        {
+            ELearningUtils::setConfigValue("user_style", $style_setting, $this->cms_type);
+            ELearningUtils::setConfigValue("user_skin", $style_setting, $this->cms_type);
+            ELearningUtils::setConfigValue("encrypt_passwords", $encrypt_passwords, $this->cms_type);
+        }
+        else
+        {
+            if (ELearningUtils::getConfigValue("user_style", $this->cms_type) != "")
+                $style_setting = ELearningUtils::getConfigValue("user_style", $this->cms_type);
+            if (ELearningUtils::getConfigValue("encrypt_passwords", $this->cms_type) != "")
+                $encrypt_passwords = ELearningUtils::getConfigValue("encrypt_passwords", $this->cms_type);
+        }
+
+
+        if ($messages["error"] != "")
+            echo "<b>" . Icon::create('decline', 'attention')->asImg(['class' => 'text-top', 'title' => _('Fehler')]) . " " . $messages["error"] . "</b><br><br>";
+
+        echo "<table>";
+        echo "<tr valign=\"top\"><td width=30% align=\"left\"><font size=\"-1\">";
+        echo "<b>" . _("SOAP-Verbindung: ") . "</b>";
+        echo "</td><td><font size=\"-1\">";
+        $error = $this->soap_client->getError();
+        if ($error != false)
+            echo sprintf(_("Beim Herstellen der SOAP-Verbindung trat folgender Fehler auf:")) . "<br><br>" . $error;
+        else
+            echo sprintf(_("Die SOAP-Verbindung zum Klienten \"%s\" wurde hergestellt, der Name des Administrator-Accounts ist \"%s\"."), htmlReady($this->soap_data["client"]), htmlReady($this->soap_data["username"]));
+        echo "<br>\n";
+        echo "<br>\n";
+        echo "</td></tr><tr><td  width=30% align=\"left\"><font size=\"-1\">";
+
+        $cat = $this->soap_client->getObjectByReference( $this->main_category_node_id );
+        echo '<b>' . _('Kategorie') . ':</b>';
+        echo "</td><td>";
+        echo "<input type=\"text\" size=\"20\" border=0 value=\"" . $cat["title"] . "\" name=\"cat_name\">&nbsp;";
+        echo Icon::create('info-circle', 'inactive', ['title' => _('Geben Sie hier den Namen einer bestehenden ILIAS 3 - Kategorie ein, in der die Lernmodule und User-Kategorien abgelegt werden sollen.')])->asImg();
+        echo "</td></tr><tr><td></td><td><font size=\"-1\">";
+        echo " (ID " . $this->main_category_node_id;
+        if ($cat["description"] != "")
+            echo ", " . _("Beschreibung: ") . htmlReady($cat["description"]);
+        echo ")";
+        echo "<br>\n";
+        echo "<br>\n";
+        echo "</td></tr><tr><td  width=30% align=\"left\"><font size=\"-1\">";
+
+
+        echo "<b>" . _("Rollen-Template für die persönliche Kategorie: ") . "</b>";
+        echo "</td><td>";
+        echo "<input type=\"text\" size=\"20\" border=0 value=\"" . ELearningUtils::getConfigValue("user_role_template_name", $this->cms_type) . "\" name=\"role_template_name\">&nbsp;";
+        echo Icon::create('info-circle', 'inactive', ['title' => _('Geben Sie den Namen des Rollen-Templates ein, das für die persönliche Kategorie von Lehrenden verwendet werden soll (z.B. \"Author\").')])->asImg();
+        echo "</td></tr><tr><td></td><td><font size=\"-1\">";
+        echo " (ID " . $this->user_role_template_id;
+        echo ")";
+        echo "<br>\n";
+        echo "<br>\n";
+        echo "</td></tr><tr><td  width=30% align=\"left\"><font size=\"-1\">";
+
+        echo "<b>" . _("Passwörter: ") . "</b>";
+        echo "</td><td><font size=\"-1\">";
+        echo "<input type=\"checkbox\" border=0 value=\"md5\" name=\"encrypt_passwords\"";
+        if ($encrypt_passwords == "md5")
+            echo " checked";
+        echo ">&nbsp;" . _("ILIAS-Passwörter verschlüsselt speichern.");
+        echo Icon::create('info-circle', 'inactive', ['title' => _('Wählen Sie diese Option, wenn die ILIAS-Passwörter der zugeordneten Accounts verschlüsselt in der Stud.IP-Datenbank abgelegt werden sollen.')])->asImg();
+        echo "</td></tr><tr><td></td><td><font size=\"-1\">";
+        echo "<br>\n";
+        echo "<br>\n";
+        echo "</td></tr><tr><td  width=30% align=\"left\"><font size=\"-1\">";
+
+        echo "<b>" . _("Style / Skin: ") . "</b>";
+        echo "</td><td><font size=\"-1\">";
+        echo "<input type=\"checkbox\" border=0 value=\"studip\" name=\"style_setting\"";
+        if ($style_setting == "studip")
+            echo " checked";
+        echo ">&nbsp;" . _("Stud.IP-Style für neue Nutzer-Accounts voreinstellen.");
+        echo Icon::create('info-circle', 'inactive', ['title' => _('Wählen Sie diese Option, wenn für alle von Stud.IP angelegten ILIAS-Accounts das Stud.IP-Layout als System-Style eingetragen werden soll. ILIAS-seitig angelegte Accounts erhalten weiterhin den Standard-Style.')])->asImg();
+        echo "</td></tr><tr><td></td><td><font size=\"-1\">";
+        echo "<br>\n";
+        echo "<br>\n";
+
+
+
+
+        echo "</td></tr>";
+        echo "</table>";
+        echo "<center>" . Button::create(_('übernehmen'), 'submit') . "</center><br>";
+        echo "<br>\n";
+
+        parent::getPreferences();
+
+        echo "<br>\n";
+    }
+
+    function setContentModule($data, $is_connected = false)
+    {
+        parent::setContentModule($data, $is_connected);
+
+        if ($data["owner"] != "")
+        {
+            $user_data = $this->soap_client->getUser($data["owner"]);
+            $user_name = trim($user_data["title"] . " " . $user_data["firstname"] . " " . $user_data["lastname"]);
+            $this->content_module[$data["ref_id"]]->setAuthors($user_name);
+        }
+        $this->content_module[$data["ref_id"]]->setPermissions($data["accessInfo"], $data["operations"]);
+    }
+
+    /**
+    * create new instance of subclass content-module
+    *
+    * creates new instance of subclass content-module and gets permissions
+    * @access public
+    * @param string $module_id module-id
+    * @param string $module_type module-type
+    * @param string $is_connected is module connected to seminar?
+    */
+    function newContentModule($module_id, $module_type, $is_connected = false)
+    {
+        global $seminar_id, $current_module, $caching_active;
+
+        $current_module = $module_id;
+//      echo "call module $module_id";
+
+        if ($this->is_first_call  AND ($seminar_id != "") AND ($is_connected == true))
+        {
+            $id = ObjectConnections::getConnectionModuleId( $seminar_id, "crs", $this->cms_type );
+            if ($id != false)
+            {
+                if ($this->user->isConnected())
+                    $this->permissions->checkUserPermissions($id);
+                $this->is_first_call = false;
+            }
+//          echo "first call, ref_id $id";
+        }
+
+        parent::newContentModule($module_id, $module_type, $is_connected);
+    }
+
+    /**
+    * get user modules
+    *
+    * returns user content modules
+    * @access public
+    * @return array list of content modules
+    */
+    function getUserContentModules()
+    {
+        global $connected_cms;
+
+        $types = [];
+        foreach ($this->types as $type => $name)
+        {
+            $types[] = $type;
+        }
+        if ($this->user->getCategory() == false)
+            return false;
+        $result = $this->soap_client->getTreeChilds($this->user->getCategory(), $types, $connected_cms[$this->cms_type]->user->getId());
+        $obj_ids = [];
+        if (is_array($result))
+            foreach($result as $key => $object_data){
+                if (is_array($object_data["operations"])){
+                    if ((!in_array($object_data["obj_id"], $obj_ids) && in_array(OPERATION_READ, $object_data["operations"]))
+                    || in_array(OPERATION_WRITE, $object_data["operations"]))
+                    {
+                        if (is_array($user_modules[$object_data["obj_id"]]["operations"])){
+                            if (in_array(OPERATION_WRITE, $user_modules[$object_data["obj_id"]]["operations"])){
+                                continue;
+                            }
+                        }
+                        $user_modules[$object_data["obj_id"]] = $object_data;
+                        $obj_ids[] = $result[$key]["obj_id"];
+                    }
+                }
+            }
+        return $user_modules;
+    }
+
+    /**
+    * search for content modules
+    *
+    * returns found content modules
+    * @access public
+    * @param string $key keyword
+    * @return array list of content modules
+    */
+    function searchContentModules($key)
+    {
+        global $connected_cms;
+
+        $types = [];
+        foreach ($this->types as $type => $name)
+        {
+            $types[] = $type;
+        }
+
+        $result = $this->soap_client->searchObjects($types, $key,"and", $connected_cms[$this->cms_type]->user->getId());
+        return $result;
+    }
+
+
+    /**
+    * get client-id
+    *
+    * returns client-id
+    * @access public
+    * @return string client-id
+    */
+    function getClientId()
+    {
+        return $this->client_id;
+    }
+
+    /**
+    * get session-id
+    *
+    * returns soap-session-id
+    * @access public
+    * @return string session-id
+    */
+    function getSID()
+    {
+        return $this->root_user_sid;
+    }
+
+    /**
+    * terminate
+    *
+    * terminates connection.
+    * @access public
+    * @return boolean returns false
+    */
+    function terminate()
+    {
+//      $this->soap_client->logout();
+        $this->soap_client->saveCacheData();
+    }
+
+    //we have to delete the course only
+    function deleteConnectedModules($object_id){
+        global $connected_cms;
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+        $connected_cms[$this->cms_type]->soap_client->clearCache();
+        $connected_cms[$this->cms_type]->soap_client->user_type == "admin";
+        $crs_id = ObjectConnections::getConnectionModuleId($object_id, "crs", $this->cms_type);
+        if($crs_id && $connected_cms[$this->cms_type]->soap_client->checkReferenceById($crs_id)){
+            $connected_cms[$this->cms_type]->soap_client->deleteObject($crs_id);
+        }
+        return parent::deleteConnectedModules($object_id);
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3ConnectedLink.class.php b/lib/elearning/Ilias3ConnectedLink.class.php
new file mode 100644
index 0000000..7565cfb
--- /dev/null
+++ b/lib/elearning/Ilias3ConnectedLink.class.php
@@ -0,0 +1,191 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+use Studip\Button, Studip\LinkButton;
+
+/**
+* class to generate links to ILIAS 3
+*
+* This class contains methods to generate links to ILIAS 3.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3ConnectedLink
+* @package  ELearning-Interface
+*/
+class Ilias3ConnectedLink extends ConnectedLink
+{
+    /**
+    * constructor
+    *
+    * init class.
+    * @access
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+        $this->cms_link = "ilias3_referrer.php";
+    }
+
+    /**
+    * get user module links
+    *
+    * returns content module links for user
+    * @access public
+    * @return string html-code
+    */
+    function getUserModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        if ($connected_cms[$this->cms_type]->isAuthNecessary() AND (! $connected_cms[$this->cms_type]->user->isConnected()))
+        {
+            $output .= $this->getNewAccountLink();
+        }
+        else
+        {
+            if (! $connected_cms[$this->cms_type]->content_module[$current_module]->isDummy() )
+            {
+                if ($connected_cms[$this->cms_type]->content_module[$current_module]->isAllowed(OPERATION_READ))
+                {
+
+                    $output .= LinkButton::create(_('Starten'), URLHelper::getURL($this->cms_link . "?"
+                        . "client_id=" . $connected_cms[$this->cms_type]->getClientId()
+                        . "&cms_select=" . $this->cms_type
+//                      . "&sess_id=" . $connected_cms[$this->cms_type]->user->getSessionId()
+                        . "&ref_id=" . $connected_cms[$this->cms_type]->content_module[$current_module]->getId()
+                        . "&type=" . $connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()
+                        . $auth_data
+                        . "&target=start"), [
+                            'target' => '_blank',
+                            'rel'    => 'noopener noreferrer',
+                        ]);
+                    $output .= "&nbsp;";
+                }
+                if ($connected_cms[$this->cms_type]->content_module[$current_module]->isAllowed(OPERATION_WRITE))
+                {
+                    $output .= LinkButton::create(_('Bearbeiten'), URLHelper::getURL($this->cms_link . "?"
+                        . "client_id=" . $connected_cms[$this->cms_type]->getClientId()
+                        . "&cms_select=" . $this->cms_type
+//                      . "&sess_id=" . $connected_cms[$this->cms_type]->user->getSessionId()
+                        . "&ref_id=" . $connected_cms[$this->cms_type]->content_module[$current_module]->getId()
+                        . "&type=" . $connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()
+                        . $auth_data
+                        . "&target=edit"), [
+                            'target' => '_blank',
+                            'rel'    => 'noopener noreferrer',
+                        ]);
+                    $output .= "&nbsp;";
+
+                }
+            }
+        }
+
+        return $output;
+    }
+
+    /**
+    * get admin module links
+    *
+    * returns links add or remove a module from course
+    * @access public
+    * @return string returns html-code
+    */
+    function getAdminModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        $output .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">\n";
+        $output .= CSRFProtection::tokenTag();
+        $output .= "<input type=\"HIDDEN\" name=\"view\" value=\"" . htmlReady($view) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"search_key\" value=\"" . htmlReady($search_key) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"cms_select\" value=\"" . htmlReady($cms_select) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_type\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_id\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getId()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_system_type\" value=\"" . htmlReady($this->cms_type) . "\">\n";
+
+        if ($connected_cms[$this->cms_type]->content_module[$current_module]->isConnected())
+            $output .= "&nbsp;" . Button::create(_('Entfernen'), 'remove');
+        elseif ($connected_cms[$this->cms_type]->content_module[$current_module]->isAllowed(OPERATION_WRITE))
+        {
+            $output .= "<div align=\"left\"><input type=\"CHECKBOX\" value=\"1\" name=\"write_permission\" style=\"vertical-align:middle\">";
+            $output .= _("Mit Schreibrechten für alle Lehrenden/Tutoren und Tutorinnen dieser Veranstaltung") . "<br>";
+            $output .= "<input type=\"CHECKBOX\" value=\"1\" style=\"vertical-align:middle\" name=\"write_permission_autor\">";
+            $output .= _("Mit Schreibrechten für alle Teilnehmenden dieser Veranstaltung") . "</div>";
+            $output .=  Button::create(_('Hinzufügen'), 'add') . "<br>";
+        }
+        else
+            $output .= "&nbsp;" . Button::create(_('Hinzufügen'), 'add');
+        $output .= "</form>";
+
+        return $output;
+//      $output .= parent::getAdminModuleLinks();
+    }
+
+    /**
+    * get new module link
+    *
+    * returns link to create a new module if allowed
+    * @access public
+    * @return string returns html-code or false
+    */
+    function getNewModuleLink()
+    {
+        global $connected_cms, $auth;
+        $output = "\n";
+//      echo "NML.";
+        if ((Request::get("module_type_" . $this->cms_type) != ""))
+        {
+//          echo "TYPE.";
+            if ($connected_cms[$this->cms_type]->user->category == "")
+            {
+//              echo "NoCat.";
+                $connected_cms[$this->cms_type]->user->newUserCategory();
+                if ($connected_cms[$this->cms_type]->user->category == false)
+                    return $output;
+            }
+            $output = "&nbsp;" . LinkButton::create(_('Neu anlegen'), URLHelper::getURL($this->cms_link . "?"
+                . "client_id=" . $connected_cms[$this->cms_type]->getClientId()
+                . "&cms_select=" . $this->cms_type
+//              . "&sess_id=" . $connected_cms[$this->cms_type]->user->getSessionId()
+                . "&ref_id=" . $connected_cms[$this->cms_type]->user->category
+                . $auth_data
+                . "&type=" . Request::option("module_type_" . $this->cms_type) . "&target=new"), [
+                    'target' => '_blank',
+                    'rel'    => 'noopener noreferrer',
+                ]);
+//          echo $output . ".";
+        }
+        $user_crs_role = $connected_cms[$this->cms_type]->crs_roles[$auth->auth["perm"]];
+        if ($user_crs_role=="admin")
+            return $output;
+        else
+            return false;
+    }
+
+    /**
+    * get start page link
+    *
+    * returns link to ilias start-page
+    * @access public
+    * @return string returns url or false
+    */
+    function getStartpageLink()
+    {
+        global $connected_cms;
+
+        if ($connected_cms[$this->cms_type]->user->isConnected()) {
+            $output = $this->cms_link . "?"
+                . "client_id=" . $connected_cms[$this->cms_type]->getClientId()
+                . "&cms_select=" . $this->cms_type
+                . "&target=login";
+        }
+        return $output;
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3ConnectedPermissions.class.php b/lib/elearning/Ilias3ConnectedPermissions.class.php
new file mode 100644
index 0000000..81bb54c
--- /dev/null
+++ b/lib/elearning/Ilias3ConnectedPermissions.class.php
@@ -0,0 +1,260 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+DEFINE ("CRS_NOTIFICATION", "1");
+DEFINE ("CRS_NO_NOTIFICATION", "2");
+DEFINE ("CRS_ADMIN_ROLE", "1");
+DEFINE ("CRS_MEMBER_ROLE", "2");
+DEFINE ("CRS_TUTOR_ROLE", "3");
+DEFINE ("CRS_PASSED_VALUE", "0");
+
+DEFINE ("OPERATION_VISIBLE", "visible");
+DEFINE ("OPERATION_READ", "read");
+DEFINE ("OPERATION_WRITE", "write");
+DEFINE ("OPERATION_DELETE", "delete");
+DEFINE ("OPERATION_CREATE_LM", "create_lm");
+DEFINE ("OPERATION_CREATE_TEST", "create_tst");
+DEFINE ("OPERATION_CREATE_QUESTIONS", "create_qps");
+DEFINE ("OPERATION_CREATE_FILE", "create_file");
+
+/**
+* class to handle ILIAS 3 access controls
+*
+* This class contains methods to handle permissions on connected objects.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3ConnectedPermission
+* @package  ELearning-Interface
+*/
+class Ilias3ConnectedPermissions extends ConnectedPermissions
+{
+    var $operations;
+    var $allowed_operations;
+    var $tree_allowed_operations;
+
+    var $USER_OPERATIONS;
+    var $AUTHOR_OPERATIONS;
+    /**
+    * constructor
+    *
+    * init class.
+    * @access
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $connected_cms;
+
+        parent::__construct($cms);
+        $this->readData();
+
+        if ($connected_cms[$this->cms_type]->user->isConnected())
+        {
+            $roles = $this->getUserRoles();
+            $connected_cms[$this->cms_type]->user->setRoles( $roles );
+        }
+        $this->USER_OPERATIONS = [OPERATION_VISIBLE, OPERATION_READ];
+//      $this->AUTHOR_OPERATIONS = array(OPERATION_VISIBLE, OPERATION_READ, OPERATION_CREATE_LM, OPERATION_CREATE_TEST, OPERATION_CREATE_QUESTIONS, OPERATION_CREATE_FILE);
+        $this->permissions_changed = false;
+    }
+
+    /**
+    * read data
+    *
+    * reads acces control data from database
+    * @access public
+    */
+    function readData()
+    {
+        global $connected_cms;
+
+//      $this->operations = $this->db_class->getOperations($connected_cms[$this->cms_type]->db);
+
+        $this->operations = $connected_cms[$this->cms_type]->soap_client->getOperations();
+    }
+
+    /**
+    * check user permissions
+    *
+    * checks user permissions for connected course and changes setting if necessary
+    * @access public
+    * @param string $course_id course-id
+    * @return boolean returns false on error
+    */
+    function checkUserPermissions($course_id = "")
+    {
+        global $connected_cms, $messages;
+
+        if ($course_id == "")
+            return false;
+        if ($connected_cms[$this->cms_type]->user->getId() == "")
+            return false;
+
+        // get course role folder and local roles
+        $local_roles = $connected_cms[$this->cms_type]->soap_client->getLocalRoles($course_id);
+        $active_role = "";
+        $proper_role = "";
+        $user_crs_role = $connected_cms[$this->cms_type]->crs_roles[$perm->get_studip_perm(Context::getId())];
+        if (is_array($local_roles))
+            foreach ($local_roles as $key => $role_data)
+                // check only if local role is il_crs_member, -tutor or -admin
+                if (! (mb_strpos($role_data["title"], "_crs_") === false))
+                {
+                    if ( in_array( $role_data["obj_id"], $connected_cms[$this->cms_type]->user->getRoles() ) )
+                        $active_role = $role_data["obj_id"];
+                    if ( mb_strpos( $role_data["title"], $user_crs_role) > 0 )
+                        $proper_role = $role_data["obj_id"];
+                }
+    //          if ($GLOBALS["debug"] == true)
+    //              echo "P$proper_role A$active_role U" . $user_crs_role . " R" . implode($connected_cms[$this->cms_type]->user->getRoles(), ".")."<br>";
+
+        // is user already course-member? otherwise add member with proper role
+        $is_member = $connected_cms[$this->cms_type]->soap_client->isMember( $connected_cms[$this->cms_type]->user->getId(), $course_id);
+        if (! $is_member)
+        {
+            $member_data["usr_id"] = $connected_cms[$this->cms_type]->user->getId();
+            $member_data["ref_id"] = $course_id;
+            $member_data["status"] = CRS_NO_NOTIFICATION;
+            $type = "";
+            switch ($user_crs_role)
+            {
+                case "admin":
+                    $member_data["role"] = CRS_ADMIN_ROLE;
+                    $type = "Admin";
+                    break;
+                case "tutor":
+                    $member_data["role"] = CRS_TUTOR_ROLE;
+                    $type = "Tutor";
+                    break;
+                case "member":
+                    $member_data["role"] = CRS_MEMBER_ROLE;
+                    $type = "Member";
+                    break;
+                default:
+            }
+            $member_data["passed"] = CRS_PASSED_VALUE;
+            if ($type != "")
+            {
+                $connected_cms[$this->cms_type]->soap_client->addMember( $connected_cms[$this->cms_type]->user->getId(), $type, $course_id );
+                if ($GLOBALS["debug"] == true)
+                    echo "addMember";
+                $this->permissions_changed = true;
+            }
+        }
+
+        // check if user has proper local role
+        // if not, change it
+        if ($active_role != $proper_role)
+        {
+            if ($active_role != "")
+            {
+                $connected_cms[$this->cms_type]->soap_client->deleteUserRoleEntry( $connected_cms[$this->cms_type]->user->getId(), $active_role);
+                if ($GLOBALS["debug"] == true)
+                    echo "Role $active_role deleted.";
+            }
+
+            if ($proper_role != "")
+            {
+                $connected_cms[$this->cms_type]->soap_client->addUserRoleEntry( $connected_cms[$this->cms_type]->user->getId(), $proper_role);
+                if ($GLOBALS["debug"] == true)
+                    echo "Role $proper_role added.";
+            }
+            $this->permissions_changed = true;
+
+        }
+        if (!$this->getContentModulePerms($course_id)) {
+            $messages["info"] .= _("Für den zugeordneten ILIAS-Kurs konnten keine Berechtigungen ermittelt werden.") . "<br>";
+        }
+    }
+
+    /**
+    * get user roles
+    *
+    * returns roles for current user
+    * @access public
+    * @return array role-ids
+    */
+    function getUserRoles()
+    {
+        global $connected_cms;
+
+        return $connected_cms[$this->cms_type]->soap_client->getUserRoles($connected_cms[$this->cms_type]->user->getId());
+    }
+
+    /**
+    * get permissions for content module
+    *
+    * returns allowed operations for given user and module
+    * @access public
+    * @param string $module_id module-id
+    * @return boolean returns false on error
+    */
+    function getContentModulePerms($module_id)
+    {
+        global $connected_cms, $current_module;
+
+        if (is_array($connected_cms[$this->cms_type]->content_module[$current_module]->allowed_operations))
+            return true;
+        $this->allowed_operations = [];
+        $this->tree_allowed_operations = $connected_cms[$this->cms_type]->soap_client->getObjectTreeOperations(
+                    $module_id,
+                    $connected_cms[$this->cms_type]->user->getId()
+                    );
+//      echo "MID".$module_id."UID".$connected_cms[$this->cms_type]->user->getId()."OPS".implode($this->tree_allowed_operations,"-") ;
+        if (! is_array($this->tree_allowed_operations))
+            return false;
+
+        $no_permission = false;
+        if (isset($current_module)) { //TODO: fixes Warning:Creating default object from empty value - possible side effects
+            if ((! in_array($this->operations[OPERATION_READ], $this->tree_allowed_operations)) OR (! in_array($this->operations[OPERATION_VISIBLE], $this->tree_allowed_operations)))
+                $no_permission = true;
+
+            if ($no_permission == false)
+                $connected_cms[$this->cms_type]->content_module[$current_module]->allowed_operations = $this->tree_allowed_operations;
+            else
+                $connected_cms[$this->cms_type]->content_module[$current_module]->allowed_operations = false;
+        }
+        return true;
+    }
+
+    /**
+    * get operation
+    *
+    * returns id for given operation-string
+    * @access public
+    * @param string $operation operation
+    * @return integer operation-id
+    */
+    function getOperation($operation)
+    {
+        return $this->operations[$operation];
+    }
+
+    /**
+    * get operation-ids
+    *
+    * returns an array of operation-ids
+    * @access public
+    * @param string $operation operation
+    * @return array operation-ids
+    */
+    function getOperationArray($operation)
+    {
+        if (is_array($operation))
+        {
+            foreach ($operation as $key => $operation_name)
+            {
+                $ops_array[] = $this->operations[$operation_name];
+            }
+        }
+        else
+            return false;
+        return $ops_array;
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3ConnectedUser.class.php b/lib/elearning/Ilias3ConnectedUser.class.php
new file mode 100644
index 0000000..90170f1
--- /dev/null
+++ b/lib/elearning/Ilias3ConnectedUser.class.php
@@ -0,0 +1,350 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+* class to handle ILIAS 3 user-accounts
+*
+* This class contains methods to handle connected ILIAS 3 user-accounts.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3ConnectedUser
+* @package  ELearning-Interface
+*/
+class Ilias3ConnectedUser extends ConnectedUser
+{
+    var $roles;
+    var $user_sid;
+    /**
+    * constructor
+    *
+    * init class.
+    * @access
+    * @param string $cms system-type
+    */
+    function __construct($cms, $user_id = false)
+    {
+        global $connected_cms, $perm;
+
+        parent::__construct($cms, $user_id);
+        // create account automatically if it doesn't exist
+        if (! $this->isConnected() AND ($connected_cms[$this->cms_type]->USER_AUTO_CREATE == true))
+        {
+            $this->setPassword(md5(uniqid("4dfmjsnll")));
+            $this->newUser(true);
+            $this->readData();
+        }
+        $this->roles = [$connected_cms[$cms]->roles[$perm->get_perm($this->studip_id)]];
+    }
+
+    function readData()
+    {
+        global $connected_cms;
+        parent::readData();
+        if($this->is_connected){
+            $user_id = $connected_cms[$this->cms_type]->soap_client->lookupUser($this->login);
+            if (!$user_id) {
+                //do not delete in case of error
+                if($user_id !== false) {
+                    $query = "DELETE FROM auth_extern WHERE studip_user_id = ? LIMIT 1";
+                    $statement = DBManager::get()->prepare($query);
+                    $statement->execute([$this->studip_id]);
+                }
+                $this->id = '';
+                $this->login = '';
+                $this->external_password = '';
+                $this->category = '';
+                $this->type = '';
+                $this->is_connected = false;
+            } elseif($this->category != ''){
+                $cat = $connected_cms[$this->cms_type]->soap_client->checkReferenceById($this->category);
+                if(!$cat){
+                    $query = "UPDATE auth_extern SET external_user_category = '' WHERE studip_user_id = ? LIMIT 1";
+                    $statement = DBManager::get()->prepare($query);
+                    $statement->execute([$this->studip_id]);
+
+                    $this->category = '';
+                }
+            }
+        }
+        return $this->is_connected;
+    }
+
+    /**
+    * get login-data
+    *
+    * gets login-data from database
+    * @access public
+    * @param string $username username
+    * @return boolean returns false, if no data was found
+    */
+    function getLoginData($username)
+    {
+        global $connected_cms;
+
+        if (!$username) {
+            return false;
+        }
+        $user_id = $connected_cms[$this->cms_type]->soap_client->lookupUser($username);
+
+        if ($user_id == false)
+            return false;
+
+        $user_data = $connected_cms[$this->cms_type]->soap_client->getUser($user_id);
+
+        if ($user_data == false)
+            return false;
+
+        $this->id = $user_data["usr_id"];
+        $this->login = $user_data["login"];
+        $this->external_password = $user_data["passwd"];
+        return true;
+    }
+
+    /**
+    * get crypted password
+    *
+    * returns ILIAS 3 password
+    * @access public
+    * @param string $password password
+    * @return string password
+    */
+    function getCryptedPassword($password)
+    {
+        return md5($password);
+    }
+
+    /**
+    * set roles
+    *
+    * sets roles
+    * @access public
+    * @param array $role_array role-array
+    */
+    function setRoles($role_array)
+    {
+        $this->roles = $role_array;
+    }
+
+    /**
+    * get roles
+    *
+    * returns roles
+    * @access public
+    * @return array roles
+    */
+    function getRoles()
+    {
+        return $this->roles;
+    }
+
+    /**
+    * create new user category
+    *
+    * create new user category
+    * @access public
+    * @return boolean returns false on error
+    */
+    function newUserCategory()
+    {
+        global $connected_cms, $messages;
+
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+
+        // data for user-category in ILIAS 3
+        $object_data["title"] = sprintf(_("Eigene Daten von %s (%s)."), $this->getName(), $this->getId());
+        $object_data["description"] = sprintf(_("Hier befinden sich die persönlichen Lernmodule des Benutzers %s."), $this->getName());
+        $object_data["type"] = "cat";
+        $object_data["owner"] = $this->getId();
+
+        $cat = $connected_cms[$this->cms_type]->soap_client->getReferenceByTitle($object_data["title"]);
+        if ($cat != false && $connected_cms[$this->cms_type]->soap_client->checkReferenceById($cat) )
+        {
+            $messages["info"] .= sprintf(_("Ihre persönliche Kategorie wurde bereits angelegt."), $this->login) . "<br>\n";
+            $this->category = $cat;
+        }
+        else
+        {
+            $this->category = $connected_cms[$this->cms_type]->soap_client->addObject($object_data, $connected_cms[$this->cms_type]->main_category_node_id);
+        }
+        if ($this->category != false)
+            parent::setConnection( $this->getUserType() );
+        else
+        {
+            echo "CATEGORY_ERROR".$connected_cms[$this->cms_type]->main_category_node_id ."-";
+            return false;
+        }
+        // data for personal user-role in ILIAS 3
+        $role_data["title"] = "studip_usr" . $this->getId() . "_cat" . $this->category;
+        $role_data["description"] = sprintf(_("User-Rolle von %s. Diese Rolle wurde von Stud.IP generiert."), $this->getName());
+        $role_id = $connected_cms[$this->cms_type]->soap_client->getObjectByTitle($role_data["title"], "role");
+        if ($role_id != false)
+            $messages["info"] .= sprintf(_("Ihre persönliche Userrolle wurde bereits angelegt."), $this->login) . "<br>\n";
+        else
+            $role_id = $connected_cms[$this->cms_type]->soap_client->addRoleFromTemplate($role_data, $this->category, $connected_cms[$this->cms_type]->user_role_template_id);
+        $connected_cms[$this->cms_type]->soap_client->addUserRoleEntry($this->getId(), $role_id);
+        // delete permissions for all global roles for this category
+        foreach ($connected_cms[$this->cms_type]->global_roles as $key => $role)
+            $connected_cms[$this->cms_type]->soap_client->revokePermissions($role, $this->category);
+        return true;
+    }
+
+    /**
+    * new user
+    *
+    * save new user
+    * @access public
+    * @return boolean returns false on error
+    */
+    function newUser($ignore_encrypt_passwords = false)
+    {
+        global $connected_cms, $auth, $messages;
+
+        if ($this->getLoginData($this->login))
+        {
+            $messages["error"] .= sprintf(_("Es existiert bereits ein Account mit dem Benutzernamen \"%s\"."), $this->login) . "<br>\n";
+            return false;
+        }
+
+        // data for user-account in ILIAS 3
+        $user_data["login"] = $this->login;
+        $user_data["passwd"] = $this->external_password;
+        $user_data["firstname"] = $this->firstname;
+        $user_data["lastname"] = $this->lastname;
+        $user_data["title"] = $this->title;
+        $user_data["gender"] = $this->gender;
+        $user_data["email"] = $this->email;
+        $user_data["street"] = $this->street;
+        $user_data["phone_home"] = $this->phone_home;
+        $user_data["time_limit_unlimited"] = 1;
+        $user_data["active"] = 1;
+        $user_data["approve_date"] = date('Y-m-d H:i:s');
+        $user_data["accepted_agreement"] = true;
+
+        if ($connected_cms[$this->cms_type]->user_style != "")
+            $user_data["user_style"] = $connected_cms[$this->cms_type]->user_style;
+        if ($connected_cms[$this->cms_type]->user_skin != "")
+            $user_data["user_skin"] = $connected_cms[$this->cms_type]->user_skin;
+
+        $role_id = $connected_cms[$this->cms_type]->roles[$auth->auth["perm"]];
+
+        $user_id = $connected_cms[$this->cms_type]->soap_client->addUser($user_data, $role_id);
+
+        if ($user_id != false)
+        {
+            $this->id = $user_id;
+
+//          $connected_cms[$this->cms_type]->soap_client->updatePassword($user_id, $user_data["passwd"]);
+
+//          $this->newUserCategory();
+
+            $this->setConnection(USER_TYPE_CREATED, $ignore_encrypt_passwords);
+            return true;
+        }
+        echo $connected_cms[$this->cms_type]->soap_client->getError();
+        return false;
+    }
+
+    /**
+    * update user
+    *
+    * update user-account
+    * @access public
+    * @return boolean returns false on error
+    */
+    function updateUser()
+    {
+    }
+
+    /**
+    * delete user
+    *
+    * delete user-account
+    * @access public
+    * @return boolean returns false on error
+    */
+    function deleteUser()
+    {
+        global $connected_cms;
+        $ret = null;
+        $connected_cms[$this->cms_type]->soap_client->user_type == "admin";
+        $connected_cms[$this->cms_type]->soap_client->caching_active = false;
+        if($this->category){
+            $ret['cat_deleted'] = $connected_cms[$this->cms_type]->soap_client->deleteObject($this->category);
+        }
+        if($this->type == 0 && $this->id){
+            $ret['iliasuser_deleted'] = $connected_cms[$this->cms_type]->soap_client->deleteUser($this->id);
+        }
+        $query = "DELETE FROM auth_extern WHERE studip_user_id = ? LIMIT 1";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$this->studip_id]);
+
+        $ret['auth_extern_deleted'] = $statement->rowCount();
+        return $ret;
+    }
+
+    /**
+    * set connection
+    *
+    * set user connection
+    * @access public
+    * @param string user_type user-type
+    * @return boolean returns false on error
+    */
+    function setConnection($user_type, $ignore_encrypt_passwords = false)
+    {
+        global $connected_cms;
+
+        if (!$ignore_encrypt_passwords && $connected_cms[$this->cms_type]->encrypt_passwords == "md5")
+        {
+//          echo "PASSWORD-ENCRYPTION";
+            $this->external_password = $this->getCryptedPassword( $this->external_password );
+        }
+
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+        parent::setConnection($user_type);
+    }
+
+    /**
+    * get sid
+    *
+    * returns soap-sid
+    * @access public
+    * @return string soap-sid
+    */
+    function getSID()
+    {
+        global $connected_cms;
+
+        $caching_status = $connected_cms[$this->cms_type]->soap_client->getCachingStatus();
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+
+        $connected_cms[$this->cms_type]->soap_client->setUserType("user");
+        $this->user_sid = $connected_cms[$this->cms_type]->soap_client->login();
+
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus($caching_status);
+        $connected_cms[$this->cms_type]->soap_client->setUserType("admin");
+        return $this->user_sid;
+    }
+
+    /**
+    * get session-id
+    *
+    * returns soap-session-id
+    * @access public
+    * @return string soap-session-id
+    */
+    function getSessionId()
+    {
+        $sid = $this->getSID();
+        if ($sid == false)
+            return false;
+        $arr = explode("::", $sid);
+        return $arr[0];
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3ContentModule.class.php b/lib/elearning/Ilias3ContentModule.class.php
new file mode 100644
index 0000000..1304c6c
--- /dev/null
+++ b/lib/elearning/Ilias3ContentModule.class.php
@@ -0,0 +1,297 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+* class to handle ILIAS 3 learning modules and tests
+*
+* This class contains methods to handle ILIAS 3 learning modules and tests.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3ContentModule
+* @package  ELearning-Interface
+*/
+class Ilias3ContentModule extends ContentModule
+{
+    var $object_id;
+
+    /**
+    * constructor
+    *
+    * init class.
+    * @access public
+    * @param string $module_id module-id
+    * @param string $module_type module-type
+    * @param string $cms_type system-type
+    */
+    function __construct($module_id = "", $module_type, $cms_type)
+    {
+        parent::__construct($module_id, $module_type, $cms_type);
+        if ($module_id != "")
+            $this->readData();
+    }
+
+    /**
+    * read data
+    *
+    * get module data from database.
+    * @access public
+    */
+    function readData()
+    {
+        global $connected_cms;
+
+        $object_data = $connected_cms[$this->cms_type]->soap_client->getObjectByReference($this->id, $connected_cms[$this->cms_type]->user->getId());
+        if ( (! ($object_data == false)) AND ($connected_cms[$this->cms_type]->types[$object_data["type"]] != "") )
+        {
+            // If User has no external Account, show module and link to user-assignment
+            if (! $connected_cms[$this->cms_type]->user->isConnected())
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ] );
+
+            //set module data
+            $this->setObjectId($object_data["obj_id"]);
+            $this->setTitle($object_data["title"]);
+            $this->setDescription($object_data["description"]);
+            if ($object_data["owner"] != "")
+            {
+                $user_data = $connected_cms[$this->cms_type]->soap_client->getUser($object_data["owner"]);
+                $user_name = trim($user_data["title"] . " " . $user_data["firstname"] . " " . $user_data["lastname"]);
+                $this->setAuthors($user_name);
+            }
+//          echo $object_data["accessInfo"] . ": " . implode($object_data["operations"], ".");
+            $this->setPermissions($object_data["accessInfo"], $object_data["operations"]);
+        }
+        else
+        {
+            // If module doesn't exist, show errormessage
+            $this->createDummyForErrormessage("not found");
+            $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ, OPERATION_DELETE] );
+        }
+    }
+
+    /**
+    * set permissions
+    *
+    * sets permissions for content-module
+    * @access public
+    * @param string $acces_info access-status
+    * @param array $operations array of operations
+    * @return boolean successful
+    */
+    function setPermissions($access_info, $operations)
+    {
+        global $connected_cms;
+
+        switch ($access_info)
+        {
+            case "granted":
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray($operations );
+                break;
+            case "no_permission":
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray($operations );
+                $this->setDescription($object_data["description"] . "<br><br><i>" . _("Sie haben keine Leseberechtigung für dieses Modul.") . "</i>");
+                return false;
+                break;
+            case "missing_precondition":
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray($operations );
+                $this->setDescription($object_data["description"] . "<br><br><i>" . _("Sie haben zur Zeit noch keinen Zugriff auf deses Modul (fehlende Vorbedingungen).") . "</i>");
+                break;
+            case "no_object_access":
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray($operations );
+                $this->setDescription($object_data["description"] . "<br><br><i>" . _("Dieses Modul ist momentan offline oder durch Payment-Regeln gesperrt.") . "</i>");
+                break;
+            case "no_parent_access":
+                $this->allowed_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray($operations );
+                $this->setDescription($object_data["description"] . "<br><br><i>" . _("Sie haben keinen Zugriff auf die übergeordneten Objekte dieses Moduls.") . "</i>");
+                return false;
+                break;
+            case "object_deleted":
+                $this->createDummyForErrormessage("deleted");
+                return false;
+                break;
+        }
+        if ($connected_cms[$this->cms_type]->isAuthNecessary() AND ($connected_cms[$this->cms_type]->user->isConnected()))
+        {
+            // If User has no permission, don't show module data
+            if ((! $this->isAllowed(OPERATION_VISIBLE) ) AND (! $this->isDummy()) AND ($connected_cms[$this->cms_type]->user->isConnected()))
+                $this->createDummyForErrormessage("no permission");
+        }
+
+//      echo "PERM".implode($this->allowed_operations,"-");
+    }
+
+    /**
+    * set connection
+    *
+    * sets connection with seminar
+    * @access public
+    * @param string $seminar_id seminar-id
+    * @return boolean successful
+    */
+    function setConnection($seminar_id)
+    {
+        global $connected_cms, $messages;
+
+        $write_permission = Request::option("write_permission");
+        $write_permission_autor = Request::option("write_permission_autor");
+
+        $crs_id = ObjectConnections::getConnectionModuleId($seminar_id, "crs", $this->cms_type);
+//      echo "SET?".$this->cms_type;
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+        $connected_cms[$this->cms_type]->soap_client->clearCache();
+
+        // Check, ob Kurs in ILIAS gelöscht wurde
+        if (($crs_id != false) AND ($connected_cms[$this->cms_type]->soap_client->getObjectByReference($crs_id) == false))
+        {
+            ObjectConnections::unsetConnection($seminar_id, $crs_id, "crs", $this->cms_type);
+//          echo "deleted: ".ObjectConnections::getConnectionModuleId($seminar_id, "crs", $this->cms_type);
+//          echo "Der zugeordnete ILIAS-Kurs (ID $crs_id) existiert nicht mehr. Ein neuer Kurs wird angelegt.";
+            $messages["info"] .= _("Der zugeordnete ILIAS-Kurs (ID $crs_id) existiert nicht mehr. Ein neuer Kurs wird angelegt.") . "<br>";
+            $crs_id = false;
+        }
+
+        if ($crs_id == false)
+        {
+
+            $lang_array = explode("_",Config::get()->DEFAULT_LANGUAGE);
+            $course_data["language"] = $lang_array[0];
+            $course_data["title"] = "Stud.IP-Kurs " . Context::get()->Name;
+            $course_data["description"] = "";
+            $ref_id = $connected_cms[$this->cms_type]->main_category_node_id;
+            $crs_id = $connected_cms[$this->cms_type]->soap_client->addCourse($course_data, $ref_id);
+
+            if ($crs_id == false)
+            {
+                $messages["error"] .= _("Zuordnungs-Fehler: Kurs konnte nicht angelegt werden.");
+                return false;
+             }
+            ObjectConnections::setConnection($seminar_id, $crs_id, "crs", $this->cms_type);
+
+            // Rollen zuordnen
+            $connected_cms[$this->cms_type]->permissions->CheckUserPermissions($crs_id);
+//          $messages["info"] .= "Neue Kurs-ID: $crs_id. <br>";
+        }
+
+
+        $ref_id = $this->getId();
+        $ref_id = $connected_cms[$this->cms_type]->soap_client->addReference($this->id, $crs_id);
+        $local_roles = $connected_cms[$this->cms_type]->soap_client->getLocalRoles($crs_id);
+        $member_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ]);
+        $admin_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ, OPERATION_WRITE]);
+        foreach ($local_roles as $key => $role_data){
+            // check only if local role is il_crs_member, -tutor or -admin
+            if (mb_strpos($role_data["title"], "il_crs_") === 0) {
+                if(mb_strpos($role_data["title"], 'il_crs_member') === 0){
+                    $operations = $write_permission_autor ? $admin_operations : $member_operations;
+                } else if(mb_strpos($role_data["title"], 'il_crs_tutor') === 0){
+                    $operations = $write_permission_autor || $write_permission ? $admin_operations : $member_operations;
+                } else {
+                    continue;
+                }
+                $connected_cms[$this->cms_type]->soap_client->revokePermissions($role_data["obj_id"], $ref_id);
+                $connected_cms[$this->cms_type]->soap_client->grantPermissions($operations, $role_data["obj_id"], $ref_id);
+            }
+        }
+        if ($ref_id)
+        {
+            $this->setId($ref_id);
+            return parent::setConnection($seminar_id);
+        }
+        else
+            $messages["error"] .= _("Die Zuordnung konnte nicht gespeichert werden.");
+        return false;
+    }
+
+    /**
+    * unset connection
+    *
+    * unsets connection with seminar
+    * @access public
+    * @param string $seminar_id seminar-id
+    * @return boolean successful
+    */
+    function unsetConnection($seminar_id)
+    {
+        global $connected_cms, $messages;
+
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+        {
+            if ( $this->getObjectId() != false)
+                $connected_cms[$this->cms_type]->soap_client->deleteObject($this->getId());
+            return parent::unsetConnection($seminar_id);
+        }
+        $messages["error"] .= _("Die Zuordnung konnte nicht entfernt werden.");
+        return false;
+    }
+
+    /**
+    * set object id
+    *
+    * sets object id
+    * @access public
+    * @param string $module_object_id object id
+    */
+    function setObjectId($module_object_id)
+    {
+        $this->object_id = $module_object_id;
+    }
+
+    /**
+    * get object id
+    *
+    * returns object id
+    * @access public
+    * @return string object id
+    */
+    function getObjectId()
+    {
+        return $this->object_id;
+    }
+
+    /**
+    * set allowed operations
+    *
+    * sets allowed operations
+    * @access public
+    * @param array $operation_array operation-ids
+    */
+    function setAllowedOperations( $operation_array )
+    {
+        global $connected_cms;
+
+        $this->allowed_operations = [];
+        foreach($operation_array as $key => $operation)
+        {
+//          echo "O$operation = I".$connected_cms[$this->cms_type]->permissions->getOperation[$operation]."<br>";
+            $this->allowed_operations[] = $connected_cms[$this->cms_type]->permissions->getOperation[$operation];
+        }
+    }
+
+    /**
+    * get permission-status
+    *
+    * returns true, if operation is allowed
+    * @access public
+    * @param string $operation operation
+    * @return boolean allowed
+    */
+    function isAllowed($operation)
+    {
+        global $connected_cms;
+
+        if (is_array($this->allowed_operations))
+        {
+            if (in_array($connected_cms[$this->cms_type]->permissions->getOperation($operation), $this->allowed_operations))
+                return true;
+            else
+                return false;
+        }
+        else
+            return false;
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3ObjectXMLParser.class.php b/lib/elearning/Ilias3ObjectXMLParser.class.php
new file mode 100644
index 0000000..2dc76b4
--- /dev/null
+++ b/lib/elearning/Ilias3ObjectXMLParser.class.php
@@ -0,0 +1,239 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/*
+    +-----------------------------------------------------------------------------+
+    | ILIAS open source                                                           |
+    +-----------------------------------------------------------------------------+
+    | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
+    |                                                                             |
+    | This program is free software; you can redistribute it and/or               |
+    | modify it under the terms of the GNU General Public License                 |
+    | as published by the Free Software Foundation; either version 2              |
+    | of the License, or (at your option) any later version.                      |
+    |                                                                             |
+    | This program is distributed in the hope that it will be useful,             |
+    | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
+    | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
+    | GNU General Public License for more details.                                |
+    |                                                                             |
+    | You should have received a copy of the GNU General Public License           |
+    | along with this program; if not, write to the Free Software                 |
+    | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
+    +-----------------------------------------------------------------------------+
+*/
+
+
+/**
+* Object XML Parser
+*
+* @author Stefan Meyer <smeyer@databay.de>
+*
+* @extends ilSaxParser
+* @package common
+*/
+
+class Ilias3ObjectXMLParser extends Ilias3SaxParser
+{
+    var $object_data = [];
+
+    /**
+    * Constructor
+    *
+    * @param    object      $a_content_object   must be of type ilObjContentObject
+    *                                           ilObjTest or ilObjQuestionPool
+    * @param    string      $a_xml_file         xml data
+    * @param    string      $a_subdir           subdirectory in import directory
+    * @access   public
+    */
+    function __construct($a_xml_data = '')
+    {
+        parent::__construct();
+        $this->setXMLContent($a_xml_data);
+    }
+
+    function getObjectData()
+    {
+        return $this->object_data ? $this->object_data : [];
+    }
+
+    /**
+    * set event handlers
+    *
+    * @param    resource    reference to the xml parser
+    * @access   private
+    */
+    function setHandlers($a_xml_parser)
+    {
+        xml_set_object($a_xml_parser,$this);
+        xml_set_element_handler($a_xml_parser,'handlerBeginTag','handlerEndTag');
+        xml_set_character_data_handler($a_xml_parser,'handlerCharacterData');
+    }
+
+
+
+
+    /**
+    * handler for begin of element
+    *
+    * @param    resource    $a_xml_parser       xml parser
+    * @param    string      $a_name             element name
+    * @param    array       $a_attribs          element attributes array
+    */
+    function handlerBeginTag($a_xml_parser,$a_name,$a_attribs)
+    {
+
+        switch($a_name)
+        {
+            case 'Objects':
+                $this->curr_obj = -1;
+                break;
+
+            case 'Object':
+                ++$this->curr_obj;
+                $this->reference_count = -1;
+
+                $this->addProperty__('type',$a_attribs['type']);
+                $this->addProperty__('obj_id',$a_attribs['obj_id']);
+                break;
+
+            case 'Title':
+                break;
+
+            case 'Description':
+                break;
+
+            case 'Owner':
+                break;
+
+            case 'CreateDate':
+                break;
+
+            case 'LastUpdate':
+                break;
+
+            case 'ImportId':
+                break;
+
+            case 'References':
+                ++$this->reference_count;
+                $this->addReference__($a_attribs['ref_id'], $a_attribs['accessInfo']);
+                break;
+
+            case 'Operation':
+                break;
+        }
+    }
+
+
+
+    /**
+    * handler for end of element
+    *
+    * @param    resource    $a_xml_parser       xml parser
+    * @param    string      $a_name             element name
+    */
+    function handlerEndTag($a_xml_parser,$a_name)
+    {
+        switch($a_name)
+        {
+            case 'Objects':
+                break;
+
+            case 'Object':
+                break;
+
+            case 'Title':
+                $this->addProperty__('title',trim($this->cdata));
+                break;
+
+            case 'Description':
+                $this->addProperty__('description',trim($this->cdata));
+                break;
+
+            case 'Owner':
+                $this->addProperty__('owner',trim($this->cdata));
+                break;
+
+            case 'CreateDate':
+                $this->addProperty__('create_date',trim($this->cdata));
+                break;
+
+            case 'LastUpdate':
+                $this->addProperty__('last_update',trim($this->cdata));
+                break;
+
+            case 'ImportId':
+                $this->addProperty__('import_id',trim($this->cdata));
+                break;
+
+            case 'References':
+                $this->addReference__(trim($this->cdata));
+                break;
+
+            case 'Operation':
+                $this->addOperation__(trim($this->cdata));
+                break;
+        }
+
+        $this->cdata = '';
+
+        return;
+    }
+
+    /**
+    * handler for character data
+    *
+    * @param    resource    $a_xml_parser       xml parser
+    * @param    string      $a_data             character data
+    */
+    function handlerCharacterData($a_xml_parser,$a_data)
+    {
+        if($a_data != "\n")
+        {
+            // Replace multiple tabs with one space
+            $a_data = preg_replace("/\t+/"," ",$a_data);
+
+            $this->cdata .= $a_data;
+        }
+
+
+    }
+
+    // PRIVATE
+    function addProperty__($a_name,$a_value)
+    {
+            $this->object_data[$this->curr_obj][$a_name] = $a_value;
+    /*/
+        if (is_array($this->object_data[$this->curr_obj][$a_name]))
+            $this->object_data[$this->curr_obj][$a_name][] = $a_value;
+        elseif ($this->object_data[$this->curr_obj][$a_name] != "")
+        {
+            $old_value = $this->object_data[$this->curr_obj][$a_name];
+            $this->object_data[$this->curr_obj][$a_name] = array($old_value);
+            $this->object_data[$this->curr_obj][$a_name][] = $a_value;
+        }
+        else
+            $this->object_data[$this->curr_obj][$a_name] = $a_value;
+        /**/
+    }
+
+    function addReference__($a_value, $a_accessinfo = "")
+    {
+        if($a_value)
+        {
+            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["ref_id"] = $a_value;
+            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["accessInfo"] = $a_accessinfo;
+        }
+    }
+
+    function addOperation__($a_value)
+    {
+        if($a_value)
+            $this->object_data[$this->curr_obj]['references'][$this->reference_count]["operations"][] = $a_value;
+    }
+
+}
+?>
\ No newline at end of file
diff --git a/lib/elearning/Ilias3SaxParser.class.php b/lib/elearning/Ilias3SaxParser.class.php
new file mode 100644
index 0000000..92d247d
--- /dev/null
+++ b/lib/elearning/Ilias3SaxParser.class.php
@@ -0,0 +1,230 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+/*
+    +-----------------------------------------------------------------------------+
+    | ILIAS open source                                                           |
+    +-----------------------------------------------------------------------------+
+    | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
+    |                                                                             |
+    | This program is free software; you can redistribute it and/or               |
+    | modify it under the terms of the GNU General Public License                 |
+    | as published by the Free Software Foundation; either version 2              |
+    | of the License, or (at your option) any later version.                      |
+    |                                                                             |
+    | This program is distributed in the hope that it will be useful,             |
+    | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
+    | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
+    | GNU General Public License for more details.                                |
+    |                                                                             |
+    | You should have received a copy of the GNU General Public License           |
+    | along with this program; if not, write to the Free Software                 |
+    | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
+    +-----------------------------------------------------------------------------+
+*/
+
+
+/**
+* Base class for sax-based expat parsing
+* extended classes need to overwrite the method setHandlers and implement their own handler methods
+* 
+*
+* @author Stefan Meyer <smeyer@databay>
+*
+* @package ilias-core
+*/
+class Ilias3SaxParser
+{
+    /**
+     * XML-Content type 'file' or 'string'
+     * If you choose file set the filename in constructor
+     * If you choose 'String' call the constructor with no argument and use setXMLContent()
+     * @var string
+     * @access private
+     */
+    var $input_type = null;
+
+    /**
+     * XML-Content in case of content type 'string'
+
+     * @var string 
+     * @access private
+     */
+    var $xml_content = '';
+
+    /**
+     * ilias object
+     * @var object ilias
+     * @access private
+     */
+    var $ilias;
+
+    /**
+     * language object
+     * @var object language
+     * @access private
+     */
+    var $lng;
+
+    /**
+     * xml filename
+     * @var filename
+     * @access private
+     */
+    var $xml_file;
+
+    /**
+    * Constructor
+    * setup ILIAS global object
+    * @access   public
+    */
+    function __construct($a_xml_file = '')
+    {
+        global $ilias, $lng;
+
+        if($a_xml_file)
+        {
+            $this->xml_file = $a_xml_file;
+            $this->input_type = 'file';
+        }
+        
+        $this->ilias = &$ilias;
+        $this->lng = &$lng;
+    }
+
+    function setXMLContent($a_xml_content)
+    {
+        $this->xml_content = $a_xml_content;
+        $this->input_type = 'string';
+    }
+    
+    function getXMLContent()
+    {
+        return $this->xml_content;
+    }
+
+    function getInputType()
+    {
+        return $this->input_type;
+    }
+
+    /**
+    * stores xml data in array
+    * 
+    * @access   private
+    */
+    function startParsing()
+    {
+        $xml_parser = $this->createParser();
+        $this->setOptions($xml_parser);
+        $this->setHandlers($xml_parser);
+
+        switch($this->getInputType())
+        {
+            case 'file':
+                $fp = $this->openXMLFile();
+                $this->parse($xml_parser,$fp);
+                break;
+
+            case 'string':
+                $this->parse($xml_parser);
+                break;
+
+            default:
+                echo "No input type given. Set filename in constructor or choose setXMLContent()";
+                break;
+        }
+        $this->freeParser($xml_parser);
+    }
+    /**
+    * create parser
+    * 
+    * @access   private
+    */
+    function createParser()
+    {
+        $xml_parser = xml_parser_create("UTF-8");
+
+        if($xml_parser == false)
+        {
+            echo "Cannot create an XML parser handle";
+        }
+        return $xml_parser;
+    }
+    /**
+    * set parser options
+    * 
+    * @access   private
+    */
+    function setOptions($a_xml_parser)
+    {
+        xml_parser_set_option($a_xml_parser,XML_OPTION_CASE_FOLDING,false);
+    }
+    /**
+    * set event handler
+    * should be overwritten by inherited class
+    * @access   private
+    */
+    function setHandlers($a_xml_parser)
+    {
+        echo 'ilSaxParser::setHandlers() must be overwritten';
+    }
+    /**
+    * open xml file
+    * 
+    * @access   private
+    */
+    function openXMLFile()
+    {
+        if(!($fp = fopen($this->xml_file,'r')))
+        {
+            echo "Cannot open xml file";
+        }
+        return $fp;
+    }
+    /**
+    * parse xml file
+    * 
+    * @access   private
+    */
+    function parse($a_xml_parser,$a_fp = null)
+    {
+        switch($this->getInputType())
+        {
+            case 'file':
+
+                while($data = fread($a_fp,4096))
+                {
+                    $parseOk = xml_parse($a_xml_parser,$data,feof($a_fp));
+                }
+                break;
+                
+            case 'string':
+                $parseOk = xml_parse($a_xml_parser,$this->getXMLContent());
+                break;
+        }
+        if(!$parseOk
+           && (xml_get_error_code($a_xml_parser) != XML_ERROR_NONE))
+        {
+            echo $this->getXMLContent();
+            echo "XML Parse Error: ".xml_get_error_code($a_xml_parser);
+        }
+        return true;
+                
+    }
+    /**
+    * free xml parser handle
+    * 
+    * @access   private
+    */
+    function freeParser($a_xml_parser)
+    {
+        if(!xml_parser_free($a_xml_parser))
+        {
+            echo "Error freeing xml parser handle ";
+        }
+    }
+}
+?>
diff --git a/lib/elearning/Ilias3Soap.class.php b/lib/elearning/Ilias3Soap.class.php
new file mode 100644
index 0000000..98627de
--- /dev/null
+++ b/lib/elearning/Ilias3Soap.class.php
@@ -0,0 +1,1070 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+* class to use ILIAS-3-Webservices
+*
+* This class contains methods to connect to the ILIAS-3-Soap-Server.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       Ilias3Soap
+* @package  ELearning-Interface
+*/
+class Ilias3Soap extends StudipSoapClient
+{
+    var $cms_type;
+    var $admin_sid;
+    var $user_sid;
+    var $user_type;
+    var $soap_cache;
+
+    /**
+    * constructor
+    *
+    * init class.
+    * @access
+    * @param string $cms system-type
+    */
+    function __construct($cms)
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        $this->cms_type = $cms;
+
+        parent::__construct($ELEARNING_INTERFACE_MODULES[$cms]["ABSOLUTE_PATH_SOAP"]);
+        $this->user_type = "admin";
+
+        $this->loadCacheData($cms);
+        $this->caching_active = false;
+    }
+
+
+
+    /**
+    * set usertype
+    *
+    * sets usertype fpr soap-calls
+    * @access public
+    * @param string user_type usertype (admin or user)
+    */
+    function setUserType($user_type)
+    {
+        $this->user_type = $user_type;
+    }
+
+    /**
+    * get sid
+    *
+    * returns soap-session-id
+    * @access public
+    * @return string session-id
+    */
+    function getSID()
+    {
+        if ($this->user_type == "admin")
+        {
+            if ($this->admin_sid == false)
+                $this->login();
+//          echo "a";
+            return $this->admin_sid;
+        }
+        if ($this->user_type == "user")
+        {
+            if ($this->user_sid == false)
+                $this->login();
+//            echo "u";
+            return $this->user_sid;
+        }
+        return false;
+    }
+
+    /**
+    * call soap-function
+    *
+    * calls soap-function with given parameters
+    * @access public
+    * @param string method method-name
+    * @param string params parameters
+    * @return mixed result
+    */
+    function call($method, $params)
+    {
+        $index = md5($method . ":" . implode($params, "-"));
+        // return false if no session_id is given
+        if (($method != "login") AND ($params["sid"] == ""))
+            return false;
+//      echo $this->caching_active;
+        if (($this->caching_active == true) AND (isset($this->soap_cache[$index])))
+        {
+//          echo $index;
+//          echo " from Cache<br>";
+            $result = $this->soap_cache[$index];
+        }
+        else
+        {
+            $result = $this->_call($method, $params);
+            // if Session is expired, re-login and try again
+            if (($method != "login") AND $this->soap_client->fault AND in_array(mb_strtolower($this->faultstring), ["session not valid","session invalid", "session idled"]) )
+            {
+//              echo "LOGIN AGAIN.";
+                $caching_status = $this->caching_active;
+                $this->caching_active = false;
+                $params["sid"] = $this->login();
+                $result = $this->_call($method, $params);
+                $this->caching_active = $caching_status;
+            }
+            elseif (! $this->soap_client->fault)
+                $this->soap_cache[$index] = $result;
+        }
+        return $result;
+    }
+
+    /**
+    * load cache
+    *
+    * load soap-cache
+    * @access public
+    * @param string cms cms-type
+    */
+    function loadCacheData($cms)
+    {
+        $this->soap_cache = (array)$_SESSION["cache_data"][$cms];
+    }
+
+    /**
+    * get caching status
+    *
+    * gets caching-status
+    * @access public
+    * @return boolean status
+    */
+    function getCachingStatus()
+    {
+        return $this->caching_active;
+    }
+
+    /**
+    * set caching status
+    *
+    * sets caching-status
+    * @access public
+    * @param boolean bool_value status
+    */
+    function setCachingStatus($bool_value)
+    {
+        $this->caching_active = $bool_value;
+//      echo "SET:".$this->caching_active."<br>";
+    }
+
+    /**
+    * clear cache
+    *
+    * clears cache
+    * @access public
+    */
+    function clearCache()
+    {
+        $this->soap_cache = [];
+        $_SESSION["cache_data"][$this->cms_type] = [];
+
+    }
+
+    /**
+    * save cache
+    *
+    * saves soap-cache in session-variable
+    * @access public
+    */
+    function saveCacheData()
+    {
+       $_SESSION["cache_data"][$this->cms_type] = $this->soap_cache;
+
+    }
+
+    /**
+    * parse xml
+    *
+    * use xml-parser
+    * @access public
+    * @param string data xml-data
+    * @return array object
+    */
+    function ParseXML($data)
+    {
+        $xml_parser = new Ilias3ObjectXMLParser($data);
+        $xml_parser->startParsing();
+        return $xml_parser->getObjectData();
+    }
+
+    /**
+    * login
+    *
+    * login to soap-webservice
+    * @access public
+    * @return string result
+    */
+    function login()
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        if ($this->user_type == "admin")
+            $param = [
+                'client' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["client"],
+                'username' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["username"],
+                'password' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["password"]
+                ];
+        elseif ($this->user_type == "user")
+            $param = [
+                'client' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["client"],
+                'username' => $connected_cms[$this->cms_type]->user->getUsername(),
+                'password' => $connected_cms[$this->cms_type]->user->getPassword()
+                ];
+        $result = $this->call('login', $param);
+        if ($this->user_type == "admin")
+            $this->admin_sid = $result;
+        if ($this->user_type == "user")
+            $this->user_sid = $result;
+//      if ($this->user_type == "user") echo "SID".$this->call('login', $param).$param["username"];
+        return $result;
+    }
+
+    /**
+    * logout
+    *
+    * logout from soap-webservice
+    * @access public
+    * @return boolean result
+    */
+    function logout()
+    {
+        $param = [
+            'sid' => $this->getSID()
+            ];
+        return $this->call('logout', $param);
+    }
+
+
+///////////////////////////
+// OBJECT-FUNCTIONS //
+//////////////////////////
+
+    /**
+    * search objects
+    *
+    * search for ilias-objects
+    * @access public
+    * @param array types types
+    * @param string key keyword
+    * @param string combination search-combination
+    * @param string user_id ilias-user-id
+    * @return array objects
+    */
+    function searchObjects($types, $key, $combination, $user_id = "")
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'types' => $types,
+            'key' => $key,
+            'combination' => $combination
+            ];
+         if ($user_id != "")
+            $param["user_id"] = $user_id;
+        $result = $this->call('searchObjects', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            $all_objects = [];
+            foreach($objects as $count => $object_data){
+                if (is_array($object_data["references"]))
+                {
+                    foreach($object_data["references"] as $ref_data)
+                        if ($ref_data["accessInfo"] == "granted"
+                        && (count($all_objects[$object_data["obj_id"]]["operations"]) < count($ref_data["operations"])))
+                        {
+                            $all_objects[$object_data["obj_id"]] = $object_data;
+                            unset($all_objects[$object_data["obj_id"]]["references"]);
+                            $all_objects[$object_data["obj_id"]]["ref_id"] = $ref_data["ref_id"];
+                            $all_objects[$object_data["obj_id"]]["accessInfo"] = $ref_data["accessInfo"];
+                            $all_objects[$object_data["obj_id"]]["operations"] = $ref_data["operations"];
+                        }
+                }
+            }
+            if (count($all_objects)){
+                foreach($all_objects as $one_object){
+                    $ret[$one_object['ref_id']] = $one_object;
+                }
+                return $ret;
+            }
+        }
+        return false;
+
+    }
+
+    /**
+    * get object by reference
+    *
+    * gets object by reference-id
+    * @access public
+    * @param ref reference_id
+    * @param string user_id ilias-user-id
+    * @return array object
+    */
+    function getObjectByReference($ref, $user_id = "")
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'reference_id' => $ref
+            ];
+         if ($user_id != "")
+            $param["user_id"] = $user_id;
+        $result = $this->call('getObjectByReference', $param);
+        if ($result != false)
+        {
+
+            $objects = $this->parseXML($result);
+            foreach($objects as $count => $object_data)
+                if (is_array($object_data["references"]))
+                {
+                    foreach($object_data["references"] as $ref_data)
+                        if ($ref_data["accessInfo"] != "object_deleted" && $ref == $ref_data["ref_id"])
+                        {
+                            $all_objects[$ref_data["ref_id"]] = $object_data;
+                            unset($all_objects[$ref_data["ref_id"]]["references"]);
+                            $all_objects[$ref_data["ref_id"]]["ref_id"] = $ref_data["ref_id"];
+                            $all_objects[$ref_data["ref_id"]]["accessInfo"] = $ref_data["accessInfo"];
+                            $all_objects[$ref_data["ref_id"]]["operations"] = $ref_data["operations"];
+                        }
+                }
+            return $all_objects[$ref];
+        }
+        return false;
+    }
+
+    /**
+    * get object by title
+    *
+    * gets object by title
+    * @access public
+    * @param string key keyword
+    * @param string type object-type
+    * @return array object
+    */
+    function getObjectByTitle($key, $type = "")
+    {
+        $param = [
+            'sid'   => $this->getSID(),
+            'title' => $key
+        ];
+        $result = $this->call('getObjectsByTitle', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            foreach($objects as $index => $object_data)
+            {
+                if (($type != "") AND ($object_data["type"] != $type))
+                    unset($objects[$index]);
+                elseif (! (mb_strpos(mb_strtolower($object_data["title"]), mb_strtolower(trim($key)) ) === 0))
+                    unset($objects[$index]);
+            }
+            reset($objects);
+            if (sizeof($objects) > 0)
+                return current($objects);
+        }
+        return false;
+    }
+
+    /**
+    * get reference by title
+    *
+    * gets reference-id by object-title
+    * @access public
+    * @param string key keyword
+    * @param string type object-type
+    * @return string reference-id
+    */
+    function getReferenceByTitle($key, $type = "")
+    {
+        $param = [
+            'sid'   => $this->getSID(),
+            'title' => $key
+        ];
+        $result = $this->call('getObjectsByTitle', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            foreach($objects as $index => $object_data)
+            {
+                if (($type != "") AND ($object_data["type"] != $type))
+                    unset($objects[$index]);
+                elseif (mb_strpos(mb_strtolower($object_data["title"]), mb_strtolower(trim($key)) ) === false)
+                    unset($objects[$index]);
+            }
+            if (sizeof($objects) > 0)
+                foreach($objects as $object_data)
+                    if (sizeof($object_data["references"]) > 0)
+                    {
+                        return $object_data["references"][0]["ref_id"];
+                    }
+        }
+        return false;
+    }
+
+    /**
+    * add object
+    *
+    * adds new ilias-object
+    * @access public
+    * @param array object_data object-data
+    * @param string ref_id reference-id
+    * @return string result
+    */
+    function addObject($object_data, $ref_id)
+    {
+    $type = $object_data["type"];
+    $title = htmlReady($object_data["title"]);
+    $description = htmlReady($object_data["description"]);
+
+    $xml = "<!DOCTYPE Objects SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_object_0_1.dtd\">
+<Objects>
+  <Object type=\"$type\">
+    <Title>
+    $title
+    </Title>
+    <Description>
+    $description
+    </Description>
+  </Object>
+</Objects>";
+
+        $param = [
+            'sid' => $this->getSID(),
+            'target_id' => $ref_id,
+            'object_xml' => $xml
+            ];
+        return $this->call('addObject', $param);
+    }
+
+    /**
+    * delete object
+    *
+    * deletes ilias-object
+    * @access public
+    * @param string ref_id reference-id
+    * @return boolean result
+    */
+    function deleteObject($reference_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'reference_id' => $reference_id
+            ];
+        return $this->call('deleteObject', $param);
+    }
+
+    /**
+    * add reference
+    *
+    * add a new reference to an existing ilias-object
+    * @access public
+    * @param string object_id source-object-id
+    * @param string ref_id target-id
+    * @return string created reference-id
+    */
+    function addReference($object_id, $ref_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'source_id' => $object_id,
+            'target_id' => $ref_id
+            ];
+        return $this->call('addReference', $param);
+    }
+
+    /**
+    * get tree childs
+    *
+    * gets child-objects of the given tree node
+    * @access public
+    * @param string ref_id reference-id
+    * @param array types show only childs with these types
+    * @param string user_id user-id for permissions
+    * @return array objects
+    */
+    function getTreeChilds($ref_id, $types = "", $user_id = "")
+    {
+        if ($types == "")
+            $types = [];
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id,
+            'types' => $types
+            ];
+         if ($user_id != "")
+            $param["user_id"] = $user_id;
+        $result = $this->call('getTreeChilds', $param);
+        if ($result != false)
+        {
+
+            $objects = $this->parseXML($result);
+            foreach($objects as $count => $object_data)
+                if (is_array($object_data["references"]))
+                    foreach($object_data["references"] as $ref_data)
+                        if ($ref_data["accessInfo"] != "object_deleted")
+                        {
+                            $all_objects[$ref_data["ref_id"]] = $object_data;
+//                          unset($all_objects[$ref_id]["references"]);
+                            $all_objects[$ref_data["ref_id"]]["ref_id"] = $ref_data["ref_id"];
+                            $all_objects[$ref_data["ref_id"]]["accessInfo"] = $ref_data["accessInfo"];
+                            $all_objects[$ref_data["ref_id"]]["operations"] = $ref_data["operations"];
+                        }
+            if (sizeof($all_objects) > 0) {
+                return $all_objects;
+            } else {
+                return [];
+            }
+        }
+        return false;
+    }
+
+/////////////////////////
+// RBAC-FUNCTIONS //
+///////////////////////
+    /**
+    * get operation
+    *
+    * gets all ilias operations
+    * @access public
+    * @return array operations
+    */
+    function getOperations()
+    {
+        $param = [
+            'sid' => $this->getSID()
+            ];
+        $result = $this->call('getOperations', $param);
+        if (is_array($result))
+            foreach ($result as $operation_set)
+                $operations[$operation_set["operation"]] = $operation_set["ops_id"];
+        return $operations;
+    }
+
+    /**
+    * get object tree operations
+    *
+    * gets permissions for object at given tree-node
+    * @access public
+    * @param string ref_id reference-id
+    * @param string user_id user-id for permissions
+    * @return array operation-ids
+    */
+    function getObjectTreeOperations($ref_id, $user_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id,
+            'user_id' => $user_id
+            ];
+        $result = $this->call('getObjectTreeOperations', $param);
+        if ($result != false)
+        {
+            $ops_ids = [];
+            foreach ($result as $operation_set)
+                $ops_ids[] = $operation_set["ops_id"];
+            return $ops_ids;
+        }
+        return false;
+    }
+
+    /**
+    * get user roles
+    *
+    * gets user roles
+    * @access public
+    * @param string user_id user-id
+    * @return array role-ids
+    */
+    function getUserRoles($user_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_id' => $user_id
+           ];
+        $result = $this->call('getUserRoles', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            $roles = [];
+            foreach ($objects as $count => $role)
+                $roles[$count] = $role["obj_id"];
+//          echo implode($roles, ".");
+            return $roles;
+        }
+        return false;
+    }
+
+    /**
+    * get local roles
+    *
+    * gets local roles for given object
+    * @access public
+    * @param string course_id object-id
+    * @return array role-objects
+    */
+    function getLocalRoles($course_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $course_id
+           ];
+        $result = $this->call('getLocalRoles', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            return $objects;
+        }
+        return false;
+    }
+
+    /**
+    * add role
+    *
+    * adds a new role
+    * @access public
+    * @param array role_data data for role-object
+    * @param string ref_id reference-id
+    * @return string role-id
+    */
+    function addRole($role_data, $ref_id)
+    {
+    $type = "role";
+    $title = htmlReady($role_data["title"]);
+    $description = htmlReady($role_data["description"]);
+
+    $xml = "<!DOCTYPE Objects SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_object_0_1.dtd\">
+<Objects>
+  <Object type=\"$type\">
+    <Title>
+    $title
+    </Title>
+    <Description>
+    $description
+    </Description>
+  </Object>
+</Objects>";
+
+        $param = [
+            'sid' => $this->getSID(),
+            'target_id' => $ref_id,
+            'obj_xml' => $xml
+            ];
+        $result = $this->call('addRole', $param);
+        if (is_array($result))
+            return current($result);
+        else
+            return false;
+    }
+
+    /**
+    * add role from tremplate
+    *
+    * adds a new role and adopts properties of the given role template
+    * @access public
+    * @param array role_data data for role-object
+    * @param string ref_id reference-id
+    * @param string role_id role-template-id
+    * @return string role-id
+    */
+    function addRoleFromTemplate($role_data, $ref_id, $role_id)
+    {
+    $type = "role";
+    $title = htmlReady($role_data["title"]);
+    $description = htmlReady($role_data["description"]);
+
+    $xml = "<!DOCTYPE Objects SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_object_0_1.dtd\">
+<Objects>
+  <Object type=\"$type\">
+    <Title>
+    $title
+    </Title>
+    <Description>
+    $description
+    </Description>
+  </Object>
+</Objects>";
+
+        $param = [
+            'sid' => $this->getSID(),
+            'target_id' => $ref_id,
+            'obj_xml' => $xml,
+            'role_template_id' => $role_id
+            ];
+        $result = $this->call('addRoleFromTemplate', $param);
+        if (is_array($result))
+            return current($result);
+        else
+            return false;
+    }
+
+    /**
+    * delete user role entry
+    *
+    * deletes a role entry from the given user
+    * @access public
+    * @param string user_id user-id
+    * @param string role_id role-id
+    * @return boolean result
+    */
+    function deleteUserRoleEntry($user_id, $role_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_id' => $user_id,
+            'role_id' => $role_id
+           ];
+        return $this->call('deleteUserRoleEntry', $param);
+    }
+
+    /**
+    * add user role entry
+    *
+    * adds a role entry for the given user
+    * @access public
+    * @param string user_id user-id
+    * @param string role_id role-id
+    * @return boolean result
+    */
+    function addUserRoleEntry($user_id, $role_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_id' => $user_id,
+            'role_id' => $role_id
+           ];
+        return $this->call('addUserRoleEntry', $param);
+    }
+
+    /**
+    * grant permissions
+    *
+    * grants permissions for given operations at role-id and ref-id
+    * @access public
+    * @param array operations operation-array
+    * @param string role_id role-id
+    * @param string ref_id reference-id
+    * @return boolean result
+    */
+    function grantPermissions($operations, $role_id, $ref_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id,
+            'role_id' => $role_id,
+            'operations' => $operations,
+           ];
+        return $this->call('grantPermissions', $param);
+    }
+
+    /**
+    * revoke permissions
+    *
+    * revokes all permissions role-id and ref-id
+    * @access public
+    * @param string role_id role-id
+    * @param string ref_id reference-id
+    * @return boolean result
+    */
+    function revokePermissions($role_id, $ref_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id,
+            'role_id' => $role_id,
+           ];
+        return $this->call('revokePermissions', $param);
+    }
+
+/////////////////////////
+// USER-FUNCTIONS //
+///////////////////////
+
+    /**
+    * lookup user
+    *
+    * gets user-id for given username
+    * @access public
+    * @param string username username
+    * @return string user-id
+    */
+    function lookupUser($username)
+    {
+        $param = [
+            'sid'       => $this->getSID(),
+            'user_name' => $username,
+        ];
+        return $this->call('lookupUser', $param); // returns user_id
+    }
+
+    /**
+    * get user
+    *
+    * gets user-data for given user-id
+    * @access public
+    * @param string user_id user-id
+    * @return array user-data
+    */
+    function getUser($user_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_id'         => $user_id,
+            ];
+        $result = $this->call('getUser', $param); // returns user-data-array
+        return $result;
+    }
+
+    /**
+    * add user
+    *
+    * adds new user and sets role-id
+    * @access public
+    * @param array user_data user-data
+    * @param string role_id global role-id for new user
+    * @return string user-id
+    */
+    function addUser($user_data, $role_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_data' => $user_data,
+            'global_role_id' => $role_id
+            ];
+        return $this->call('addUser', $param); // returns user_id
+    }
+
+    /**
+    * update user
+    *
+    * update user-data
+    * @access public
+    * @param array user_data user-data
+    * @return string result
+    */
+    function updateUser($user_data)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_data' => $user_data
+        ];
+        return $this->call('updateUser', $param); // returns boolean
+    }
+
+    /**
+    * update password
+    *
+    * update password with given string and write it uncrypted to the ilias-database
+    * @access public
+    * @param string user_id user-id
+    * @param string password password
+    * @return string result
+    */
+    function updatePassword($user_id, $password)
+    {
+        $param = [
+            'sid'          => $this->getSID(),
+            'user_id'      => $user_id,
+            'new_password' => $password
+        ];
+        return $this->call('updatePassword', $param); // returns boolean
+    }
+
+    /**
+    * delete user
+    *
+    * deletes user-account
+    * @access public
+    * @param string user_id user-id
+    * @return string result
+    */
+    function deleteUser($user_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'user_id'         => $user_id
+            ];
+        return $this->call('deleteUser', $param);   // returns boolean
+    }
+
+////////////////////////////
+// COURSE-FUNCTIONS //
+//////////////////////////
+
+    /**
+    * is course member
+    *
+    * checks if user is course-member
+    * @access public
+    * @param string user_id user-id
+    * @param string course_id course-id
+    * @return boolean result
+    */
+    function isMember($user_id, $course_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'course_id'         => $course_id,
+            'user_id'         => $user_id
+            ];
+        $status = $this->call('isAssignedToCourse', $param);    // returns 0 if not assigned, 1 => course admin, 2 => course member or 3 => course tutor
+        if ($status == 0)
+            return false;
+        else
+            return true;
+    }
+
+    /**
+    * add course member
+    *
+    * adds user to course
+    * @access public
+    * @param string user_id user-id
+    * @param string type member-type (Admin, Tutor or Member)
+    * @param string course_id course-id
+    * @return boolean result
+    */
+    function addMember($user_id, $type, $course_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'course_id'         => $course_id,
+            'user_id'         => $user_id,
+            'type'         => $type
+            ];
+        return $this->call('assignCourseMember', $param);
+    }
+
+    /**
+    * add course
+    *
+    * adds course
+    * @access public
+    * @param array course_data course-data
+    * @param string ref_id target-id
+    * @return string course-id
+    */
+    function addCourse($course_data, $ref_id)
+    {
+        foreach($course_data as $key => $value) {
+            $course_data[$key] = htmlReady($course_data[$key]);
+        }
+
+        $xml = $this->getCourseXML($course_data);
+        $param = [
+            'sid' => $this->getSID(),
+            'target_id'         => $ref_id,
+            'crs_xml' => $xml
+            ];
+        $crs_id = $this->call('addCourse', $param);
+        return $crs_id;
+    }
+
+    /**
+    * get course-xml
+    *
+    * gets course xml-object for given course-data
+    * @access public
+    * @param array course_data course-data
+    * @return string course-xml
+    */
+    function getCourseXML($course_data)
+    {
+    $crs_language = $course_data["language"];
+    $crs_admin_id = $course_data["admin_id"];
+    $crs_title = $course_data["title"];
+    $crs_desc = $course_data["description"];
+
+    $xml = "<!DOCTYPE Course SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_course_0_1.dtd\">
+<Course>
+  <MetaData>
+    <General Structure=\"Hierarchical\">
+      <Identifier Catalog=\"ILIAS\"/>
+      <Title Language=\"$crs_language\">
+      $crs_title
+      </Title>
+      <Language Language=\"$crs_language\"/>
+      <Description Language=\"$crs_language\">
+      $crs_desc
+      </Description>
+      <Keyword Language=\"$crs_language\">
+      </Keyword>
+    </General>
+  </MetaData>
+  <Admin id=\"$crs_admin_id\" notification=\"Yes\" passed=\"No\">
+  </Admin>
+  <Settings>
+    <Availability>
+      <Unlimited/>
+    </Availability>
+    <Syllabus>
+    </Syllabus>
+    <Contact>
+      <Name>
+      </Name>
+      <Responsibility>
+      </Responsibility>
+      <Phone>
+      </Phone>
+      <Email>
+      </Email>
+      <Consultation>
+      </Consultation>
+    </Contact>
+    <Registration registrationType=\"Password\" maxMembers=\"0\" notification=\"No\">
+      <Disabled/>
+    </Registration>
+    <Sort type=\"Manual\"/>
+    <Archive Access=\"Disabled\">
+    </Archive>
+  </Settings>
+</Course>";
+    return $xml;
+    }
+
+    /**
+    * check reference by title
+    *
+    * gets reference-id by object-title
+    * @access public
+    * @param string key keyword
+    * @param string type object-type
+    * @return string reference-id
+    */
+    function checkReferenceById($id)
+    {
+        $param = [
+            'sid'          => $this->getSID(),
+            'reference_id' => $id
+        ];
+
+        $result = $this->call('getObjectByReference', $param);
+        if ($result != false)
+        {
+            $objects = $this->parseXML($result);
+            //echo "<pre><hr>".print_r($objects,1);
+            //echo "\n</pre><hr>";
+            if(is_array($objects)){
+                foreach($objects as $index => $object_data){
+                    if(is_array($object_data['references'])){
+                        foreach($object_data['references'] as $reference){
+                            if($reference['ref_id'] == $id && $reference['accessInfo'] != 'object_deleted') return $object_data['obj_id'];
+                        }
+                    }
+                }
+            }
+        }
+        return false;
+    }
+}
+
diff --git a/lib/elearning/Ilias4ConnectedCMS.class.php b/lib/elearning/Ilias4ConnectedCMS.class.php
new file mode 100644
index 0000000..f9e566a
--- /dev/null
+++ b/lib/elearning/Ilias4ConnectedCMS.class.php
@@ -0,0 +1,270 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+ * main-class for connection to ILIAS 4
+ *
+ * This class contains the main methods of the elearning-interface to connect to ILIAS 4. Extends Ilias3ConnectedCMS.
+ *
+ * @author   Arne Schröder <schroeder@data-quest.de>
+ * @access   public
+ * @modulegroup  elearning_interface_modules
+ * @module       Ilias4ConnectedCMS
+ * @package  ELearning-Interface
+ */
+class Ilias4ConnectedCMS extends Ilias3ConnectedCMS
+{
+    var $user_category_node_id;
+    var $ldap_enable;
+    /**
+     * constructor
+     *
+     * init class.
+     * @access public
+     * @param string $cms system-type
+     */
+    function __construct($cms)
+    {
+        global $messages;
+        parent::__construct($cms);
+        if (ELearningUtils::getConfigValue("user_category_id", $cms)) {
+            $this->user_category_node_id = ELearningUtils::getConfigValue("user_category_id", $cms);
+        } else {
+            $this->user_category_node_id = $this->main_category_node_id;
+        }
+        if (ELearningUtils::getConfigValue("ldap_enable", $cms)) {
+            $this->ldap_enable = ELearningUtils::getConfigValue("ldap_enable", $cms);
+        }
+    }
+
+    /**
+     * Helper function to fetch childs including objects in folders
+     *
+     * @access public
+     * @param string $parent_id
+     * @return array result
+     */
+    function getChilds($parent_id) {
+        $types[] = 'fold';
+        foreach ($this->types as $type => $name) {
+            $types[] = $type;
+        }
+
+        $result = $this->soap_client->getTreeChilds($parent_id, $types, $this->user->getId());
+        if ($result) {
+            $parent_path = $this->soap_client->getRawPath($parent_id) . '_' . $parent_id;
+            foreach($result as $ref_id => $data) {
+                // Workaround: getTreeChilds() liefert ALLE Referenzen der beteiligten Objekte, hier sollen aber nur die aus dem Kurs geprüft werden. Deshalb Abgleich der Pfade aller gefundenen Objekt-Referenzen.
+                if (($data["accessInfo"] != "granted") OR ($this->soap_client->getRawPath($ref_id) != $parent_path))
+                    unset($result[$ref_id]);
+                elseif ($data['type'] == 'fold') {
+                    unset($result[$ref_id]);
+                    $result = $result + $this->getChilds($ref_id);
+                }
+            }
+        }
+
+        if (is_array($result))
+            return $result;
+        else
+            return [];
+    }
+
+    /**
+     * check connected modules and update connections
+     *
+     * checks if there are modules in the course that are not connected to the seminar
+     * @access public
+     * @param string $course_id course-id
+     * @return boolean successful
+     */
+    function updateConnections($course_id)
+    {
+        global $connected_cms, $messages, $object_connections;
+
+        $db = DBManager::get();
+
+        $result = $this->soap_client->getObjectByReference($course_id);
+        if ($result) {
+            $course_path = $this->soap_client->getRawPath($course_id) . '_' . $result["ref_id"];
+        }
+        $this->soap_client->setCachingStatus(false);
+        // fetch childs
+        $result = $this->getChilds($course_id);
+
+        if (is_array($result)) {
+            $check = $db->prepare("SELECT 1 FROM object_contentmodules WHERE object_id = ? AND module_id = ? AND system_type = ? AND module_type = ?");
+            $found = [];
+            $added = 0;
+            $deleted = 0;
+            $messages["info"] .= "<b>".sprintf(_("Aktualisierung der Zuordnungen zum System \"%s\":"), $this->getName()) . "</b><br>";
+            foreach($result as $ref_id => $data) {
+                $check->execute([Context::getId(), $ref_id, $this->cms_type, $data["type"]]);
+                if (!$check->fetch()) {
+                    $messages["info"] .= sprintf(_("Zuordnung zur Lerneinheit \"%s\" wurde hinzugefügt."), ($data["title"])) . "<br>";
+                    ObjectConnections::setConnection(Context::getId(), $ref_id, $data["type"], $this->cms_type);
+                    $added++;
+                }
+                $found[] = $ref_id . '_' . $data["type"];
+            }
+            $to_delete = $db->prepare("SELECT module_id,module_type FROM object_contentmodules WHERE module_type <> 'crs' AND object_id = ? AND system_type = ? AND CONCAT_WS('_', module_id,module_type) NOT IN (?)");
+            $to_delete->execute([Context::getId(), $this->cms_type, count($found) ? $found : ['']]);
+            while ($row = $to_delete->fetch(PDO::FETCH_ASSOC)) {
+                ObjectConnections::unsetConnection(Context::getId(), $row["module_id"], $row["module_type"], $this->cms_type);
+                $deleted++;
+                $messages["info"] .= sprintf(_("Zuordnung zu \"%s\" wurde entfernt."), $row["module_id"]  . '_' . $row["module_type"]) . "<br>";
+            }
+            if (($added + $deleted) < 1) {
+                $messages["info"] .= _("Die Zuordnungen sind bereits auf dem aktuellen Stand.") . "<br>";
+            }
+        }
+        ELearningUtils::bench("update connections");
+    }
+
+    /**
+     * create course
+     *
+     * creates new ilias course
+     * @access public
+     * @param string $seminar_id seminar-id
+     * @return boolean successful
+     */
+    function createCourse($seminar_id)
+    {
+        global $messages, $ELEARNING_INTERFACE_MODULES;
+
+        $crs_id = ObjectConnections::getConnectionModuleId($seminar_id, "crs", $this->cms_type);
+        $this->soap_client->setCachingStatus(false);
+        $this->soap_client->clearCache();
+
+        if ($crs_id == false) {
+            $seminar = Seminar::getInstance($seminar_id);
+            $home_institute = Institute::find($seminar->getInstitutId());
+            if ($home_institute) {
+                $ref_id = ObjectConnections::getConnectionModuleId($home_institute->getId(), "cat", $this->cms_type);
+            }
+            if ($ref_id < 1) {
+                // Kategorie für Heimateinrichtung anlegen
+                $object_data["title"] = sprintf("%s", $home_institute->name);
+                $object_data["description"] = sprintf(_("Hier befinden sich die Veranstaltungsdaten zur Stud.IP-Einrichtung \"%s\"."), $home_institute->name);
+                $object_data["type"] = "cat";
+                $object_data["owner"] =  $this->soap_client->LookupUser($ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["username"]);
+                $ref_id = $this->soap_client->addObject($object_data, $this->main_category_node_id);
+                ObjectConnections::setConnection($home_institute->getId(), $ref_id, "cat", $this->cms_type);
+            }
+            if ($ref_id < 1) {
+                $ref_id = $this->main_category_node_id;
+            }
+
+            // Kurs anlegen
+            $lang_array = explode("_", Config::get()->DEFAULT_LANGUAGE);
+            $course_data["language"] = $lang_array[0];
+            $course_data["title"] = "Stud.IP-Kurs " . $seminar->getName();
+            $course_data["description"] = "";
+            $crs_id = $this->soap_client->addCourse($course_data, $ref_id);
+            if ($crs_id == false) {
+                $messages["error"] .= _("Zuordnungs-Fehler: Kurs konnte nicht angelegt werden.");
+                return false;
+            }
+            ObjectConnections::setConnection($seminar_id, $crs_id, "crs", $this->cms_type);
+
+            // Rollen zuordnen
+            $this->permissions->CheckUserPermissions($crs_id);
+        }
+        return $crs_id;
+    }
+
+    /**
+     * get preferences
+     *
+     * shows additional settings.
+     * @access public
+     */
+    function getPreferences()
+    {
+        global $connected_cms;
+
+        $role_template_name = Request::get('role_template_name');
+        $cat_name = Request::get('cat_name');
+
+        $this->soap_client->setCachingStatus(false);
+
+        if ($cat_name != "") {
+            $cat = $this->soap_client->getReferenceByTitle( trim( $cat_name ), "cat");
+            if ($cat == false) {
+                $messages["error"] .= sprintf(_("Das Objekt mit dem Namen \"%s\" wurde im System %s nicht gefunden."), htmlReady($cat_name), htmlReady($this->getName())) . "<br>\n";
+            } elseif ($cat != "") {
+                ELearningUtils::setConfigValue("category_id", $cat, $this->cms_type);
+                $this->main_category_node_id = $cat;
+            }
+        }
+
+        if (($this->main_category_node_id != false) AND (ELearningUtils::getConfigValue("user_category_id", $this->cms_type) == "")) {
+            $object_data["title"] = sprintf(_("User-Daten"));
+            $object_data["description"] = _("Hier befinden sich die persönlichen Ordner der Stud.IP-User.");
+            $object_data["type"] = "cat";
+            $object_data["owner"] = $this->user->getId();
+            $user_cat = $connected_cms[$this->cms_type]->soap_client->addObject($object_data, $connected_cms[$this->cms_type]->main_category_node_id);
+            if ($user_cat != false) {
+                $this->user_category_node_id = $user_cat;
+                ELearningUtils::setConfigValue("user_category_id", $user_cat, $this->cms_type);
+            } else {
+                $messages["error"] .= _("Die Kategorie für User-Daten konnte nicht angelegt werden.") . "<br>\n";
+            }
+        }
+
+        if ($role_template_name != "") {
+            $role_template = $this->soap_client->getObjectByTitle( trim( $role_template_name ), "rolt" );
+            if ($role_template == false) {
+                $messages["error"] .= sprintf(_("Das Rollen-Template mit dem Namen \"%s\" wurde im System %s nicht gefunden."), htmlReady($role_template_name), htmlReady($this->getName())) . "<br>\n";
+            }
+            if (is_array($role_template)) {
+                ELearningUtils::setConfigValue("user_role_template_id", $role_template["obj_id"], $this->cms_type);
+                ELearningUtils::setConfigValue("user_role_template_name", $role_template["title"], $this->cms_type);
+                $this->user_role_template_id = $role_template["obj_id"];
+            }
+        }
+
+        if (Request::submitted('submit')) {
+            ELearningUtils::setConfigValue("encrypt_passwords", Request::option("encrypt_passwords"), $this->cms_type);
+            $encrypt_passwords = Request::option("encrypt_passwords");
+            ELearningUtils::setConfigValue("ldap_enable", Request::option("ldap_enable"), $this->cms_type);
+            $this->ldap_enable = Request::option("ldap_enable");
+        } else {
+            if (ELearningUtils::getConfigValue("encrypt_passwords", $this->cms_type) != "")
+            $encrypt_passwords = ELearningUtils::getConfigValue("encrypt_passwords", $this->cms_type);
+        }
+
+        $cat = $this->soap_client->getObjectByReference( $this->main_category_node_id );
+        $user_cat = $this->soap_client->getObjectByReference( $this->user_category_node_id );
+        $title = $this->link->getModuleLink($user_cat["title"], $this->user_category_node_id, "cat");
+        $ldap_options = [];
+        foreach (StudipAuthAbstract::GetInstance() as $plugin) {
+            if ($plugin instanceof StudipAuthLdap) {
+                $ldap_options[] = '<option '.($plugin->plugin_name == $this->ldap_enable ? 'selected' : '').'>' . $plugin->plugin_name . '</option>';
+            }
+        }
+        ob_start();
+        ConnectedCMS::getPreferences();
+        $module_types = ob_get_clean();
+
+        $template = $GLOBALS['template_factory']->open('elearning/ilias4_connected_cms_preferences.php');
+        $template->set_attribute('messages', $messages);
+        $template->set_attribute('soap_error', $this->soap_client->getError());
+        $template->set_attribute('soap_data', $this->soap_data);
+        $template->set_attribute('main_category_node_id',  $this->main_category_node_id);
+        $template->set_attribute('main_category_node_id_title', $cat['title']);
+        $template->set_attribute('user_category_node_id',  $this->user_category_node_id);
+        $template->set_attribute('user_category_node_id_title', $title);
+        $template->set_attribute('user_role_template_name', ELearningUtils::getConfigValue("user_role_template_name", $this->cms_type));
+        $template->set_attribute('user_role_template_id', $this->user_role_template_id);
+        $template->set_attribute('encrypt_passwords', $encrypt_passwords);
+        $template->set_attribute('ldap_options', count($ldap_options) ? join("\n", array_merge(['<option></option>'], $ldap_options)) : '');
+        $template->set_attribute('module_types', $module_types);
+        echo $template->render();
+    }
+
+}
diff --git a/lib/elearning/Ilias4ConnectedLink.class.php b/lib/elearning/Ilias4ConnectedLink.class.php
new file mode 100644
index 0000000..ea241e8
--- /dev/null
+++ b/lib/elearning/Ilias4ConnectedLink.class.php
@@ -0,0 +1,122 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+use Studip\Button, Studip\LinkButton;
+
+/**
+ * class to generate links to ILIAS 4
+ *
+ * This class contains methods to generate links to ILIAS 4.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4ConnectedLink
+ * @package    ELearning-Interface
+ */
+class Ilias4ConnectedLink extends Ilias3ConnectedLink
+{
+    /**
+     * constructor
+     *
+     * init class.
+     * @access
+     * @param string $cms system-type
+     */
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+        $this->cms_link = "ilias3_referrer.php";
+    }
+
+    /**
+     * get module link
+     *
+     * returns link to the specified ilias object. works without initializing module-class.
+     * @access public
+     * @return string html-code
+     */
+    function getModuleLink($title, $module_id, $module_type)
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        if ($connected_cms[$this->cms_type]->isAuthNecessary() AND (! $connected_cms[$this->cms_type]->user->isConnected())) {
+            return false;
+        }
+        $output = "<a href=\"" . UrlHelper::getLink($this->cms_link . "?"
+        . "client_id=" . $connected_cms[$this->cms_type]->getClientId()
+        . "&cms_select=" . $this->cms_type
+        . "&ref_id=" . $module_id
+        . "&type=" . $module_type
+        . "&target=start"). "\" target=\"_blank\" rel=\"noopener noreferrer\">";
+        $output .= $title;
+        $output .= "</a>&nbsp;";
+
+        return $output;
+    }
+
+    /**
+     * get admin module links
+     *
+     * returns links add or remove a module from course
+     * @access public
+     * @return string returns html-code
+     */
+    function getAdminModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        if (! $connected_cms[$this->cms_type]->content_module[$current_module]->isDummy()) {
+            $result = $connected_cms[$this->cms_type]->soap_client->getPath($connected_cms[$this->cms_type]->content_module[$current_module]->getId());
+        }
+        if ($result) {
+            $output .= "<i>Pfad: ". htmlReady($result) . "</i><br><br>";
+        }
+        $output .= "<form method=\"POST\" action=\"" . URLHelper::getLink() . "\">\n";
+        $output .= CSRFProtection::tokenTag();
+        $output .= "<input type=\"HIDDEN\" name=\"view\" value=\"" . htmlReady($view) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"search_key\" value=\"" . htmlReady($search_key) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"cms_select\" value=\"" . htmlReady($cms_select) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_type\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getModuleType()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_id\" value=\"" . htmlReady($connected_cms[$this->cms_type]->content_module[$current_module]->getId()) . "\">\n";
+        $output .= "<input type=\"HIDDEN\" name=\"module_system_type\" value=\"" . htmlReady($this->cms_type) . "\">\n";
+
+        if ($connected_cms[$this->cms_type]->content_module[$current_module]->isConnected()) {
+            $output .= "&nbsp;" . Button::create(_('Entfernen'), 'remove');
+        } elseif ($connected_cms[$this->cms_type]->content_module[$current_module]->isAllowed(OPERATION_WRITE)) {
+            $output .= "<div align=\"left\">";
+            if ($connected_cms[$this->cms_type]->content_module[$current_module]->isAllowed(OPERATION_COPY) AND (! in_array($connected_cms[$this->cms_type]->content_module[$current_module]->module_type, ["lm", "htlm", "sahs", "cat", "crs", "dbk"]))) {
+                $output .= "<input type=\"CHECKBOX\" name=\"copy_object\" value=\"1\">";
+                $output .= _("Als Kopie anlegen") . "&nbsp;";
+                $output .= Icon::create('info-circle', 'inactive', ['title' => _('Wenn Sie diese Option wählen, wird eine identische Kopie als eigenständige Instanz des Lernmoduls erstellt. Anderenfalls wird ein Link zum Lernmodul gesetzt.')])->asImg();
+                $output .= "<br>";
+            }
+            $output .= "<input type=\"RADIO\" name=\"write_permission\" value=\"none\" checked>";
+            $output .= _("Keine Schreibrechte") . "&nbsp;";
+            $output .= Icon::create('info-circle', 'inactive', ['title' => _('Nur der/die BesitzerIn des Lernmoduls hat Schreibzugriff für Inhalte und Struktur des Lernmoduls. Tutor/-innen und Lehrende können die Verknüpfung zur Veranstaltung wieder löschen.')])->asImg();
+            $output .= "<br>";
+            $output .= "<input type=\"RADIO\" name=\"write_permission\" value=\"dozent\">";
+            $output .= _("Mit Schreibrechten für alle Lehrenden dieser Veranstaltung") . "&nbsp;";
+            $output .= Icon::create('info-circle', 'inactive', ['title' => _('Lehrende haben Schreibzugriff für Inhalte und Struktur des Lernmoduls. Tutor/-innen und Lehrende können die Verknüpfung zur Veranstaltung wieder löschen.')])->asImg();
+            $output .= "<br>";
+            $output .= "<input type=\"RADIO\" name=\"write_permission\" value=\"tutor\">";
+            $output .= _("Mit Schreibrechten für alle Lehrenden und Tutor/-innen dieser Veranstaltung") . "&nbsp;";
+            $output .= Icon::create('info-circle', 'inactive', ['title' => _('Lehrende und Tutor/-innen haben Schreibzugriff für Inhalte und Struktur des Lernmoduls. Tutor/-innen und Lehrende können die Verknüpfung zur Veranstaltung wieder löschen.')])->asImg();
+            $output .= "<br>";
+            $output .= "<input type=\"RADIO\" name=\"write_permission\" value=\"autor\">";
+            $output .= _("Mit Schreibrechten für alle Personen dieser Veranstaltung") . "&nbsp;";
+            $output .= Icon::create('info-circle', 'inactive', ['title' => _('Lehrende, Tutor/-innen und Teilnehmende haben Schreibzugriff für Inhalte und Struktur des Lernmoduls. Tutor/-innen und Lehrende können die Verknüpfung zur Veranstaltung wieder löschen.')])->asImg();
+            $output .= "</div>";
+            $output .= "</div><br>" . Button::create(_('Hinzufügen'), 'add') . "<br>";
+        } else {
+            $output .= "&nbsp;" . Button::create(_('Hinzufügen'), 'add');
+        }
+        $output .= "</form>";
+
+        return $output;
+    }
+}
+?>
diff --git a/lib/elearning/Ilias4ConnectedPermissions.class.php b/lib/elearning/Ilias4ConnectedPermissions.class.php
new file mode 100644
index 0000000..b44e7a2
--- /dev/null
+++ b/lib/elearning/Ilias4ConnectedPermissions.class.php
@@ -0,0 +1,128 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+DEFINE ("OPERATION_COPY", "copy");
+
+/**
+ * class to handle ILIAS 4 access controls
+ *
+ * This class contains methods to handle permissions on connected objects.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4ConnectedPermission
+ * @package    ELearning-Interface
+ */
+class Ilias4ConnectedPermissions extends Ilias3ConnectedPermissions
+{
+    var $operations;
+    var $allowed_operations;
+    var $tree_allowed_operations;
+
+    var $USER_OPERATIONS;
+    var $AUTHOR_OPERATIONS;
+    /**
+     * constructor
+     *
+     * init class.
+     * @access
+     * @param string $cms system-type
+     */
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+    }
+
+    /**
+     * check user permissions
+     *
+     * checks user permissions for connected course and changes setting if necessary
+     * @access public
+     * @param string $course_id course-id
+     * @return boolean returns false on error
+     */
+    function checkUserPermissions($course_id = "")
+    {
+        global $connected_cms, $messages;
+
+        if ($course_id == "") return false;
+        if ($connected_cms[$this->cms_type]->user->getId() == "") return false;
+
+        // get course role folder and local roles
+        $local_roles = $connected_cms[$this->cms_type]->soap_client->getLocalRoles($course_id);
+        $active_role = "";
+        $proper_role = "";
+        $user_crs_role = $connected_cms[$this->cms_type]->crs_roles[$GLOBALS["perm"]->get_studip_perm(Context::getId())];
+        if (is_array($local_roles)) {
+            foreach ($local_roles as $key => $role_data) {
+                // check only if local role is il_crs_member, -tutor or -admin
+                if (! (mb_strpos($role_data["title"], "_crs_") === false)) {
+                    if ( in_array( $role_data["obj_id"], $connected_cms[$this->cms_type]->user->getRoles() ) ) {
+                        $active_role = $role_data["obj_id"];
+                    }
+                    if ( mb_strpos( $role_data["title"], $user_crs_role) > 0 ) {
+                        $proper_role = $role_data["obj_id"];
+                    }
+                }
+            }
+        }
+
+        // is user already course-member? otherwise add member with proper role
+        $is_member = $connected_cms[$this->cms_type]->soap_client->isMember( $connected_cms[$this->cms_type]->user->getId(), $course_id);
+        if (!$is_member) {
+            $member_data["usr_id"] = $connected_cms[$this->cms_type]->user->getId();
+            $member_data["ref_id"] = $course_id;
+            $member_data["status"] = CRS_NO_NOTIFICATION;
+            $type = "";
+            switch ($user_crs_role)
+            {
+                case "admin":
+                    $member_data["role"] = CRS_ADMIN_ROLE;
+                    $type = "Admin";
+                    break;
+                case "tutor":
+                    $member_data["role"] = CRS_TUTOR_ROLE;
+                    $type = "Tutor";
+                    break;
+                case "member":
+                    $member_data["role"] = CRS_MEMBER_ROLE;
+                    $type = "Member";
+                    break;
+                default:
+            }
+            $member_data["passed"] = CRS_PASSED_VALUE;
+            if ($type != "") {
+                $connected_cms[$this->cms_type]->soap_client->addMember( $connected_cms[$this->cms_type]->user->getId(), $type, $course_id );
+                if ($GLOBALS["debug"] == true) echo "addMember";
+                $this->permissions_changed = true;
+            }
+        }
+
+        // check if user has proper local role
+        // if not, change it
+        if ($active_role != $proper_role) {
+            if ($active_role != "") {
+                $connected_cms[$this->cms_type]->soap_client->deleteUserRoleEntry( $connected_cms[$this->cms_type]->user->getId(), $active_role);
+                if ($GLOBALS["debug"] == true) echo "Role $active_role deleted.";
+            }
+
+            if ($proper_role != "") {
+                $connected_cms[$this->cms_type]->soap_client->addUserRoleEntry( $connected_cms[$this->cms_type]->user->getId(), $proper_role);
+                if ($GLOBALS["debug"] == true) echo "Role $proper_role added.";
+            }
+            $this->permissions_changed = true;
+
+        }
+
+        if (! $this->getContentModulePerms( $course_id )) {
+            $messages["info"] .= _("Für den zugeordneten ILIAS-Kurs konnten keine Berechtigungen ermittelt werden.") . "<br>";
+        }
+
+        return true;
+    }
+}
+?>
diff --git a/lib/elearning/Ilias4ConnectedUser.class.php b/lib/elearning/Ilias4ConnectedUser.class.php
new file mode 100644
index 0000000..0d480d4
--- /dev/null
+++ b/lib/elearning/Ilias4ConnectedUser.class.php
@@ -0,0 +1,164 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+ * class to handle ILIAS 4 user-accounts
+ *
+ * This class contains methods to handle connected ILIAS 4 user-accounts.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4ConnectedUser
+ * @package    ELearning-Interface
+ */
+class Ilias4ConnectedUser extends Ilias3ConnectedUser
+{
+    var $roles;
+    var $user_sid;
+    /**
+     * constructor
+     *
+     * init class.
+     * @access
+     * @param string $cms system-type
+     */
+    function __construct($cms, $user_id = false)
+    {
+        // get auth_plugin
+        $user_id = $user_id ? $user_id : $GLOBALS['user']->id;
+        $this->auth_plugin = DBManager::get()->query("SELECT IFNULL(auth_plugin, 'standard') FROM auth_user_md5 WHERE user_id = '" . $user_id . "'")->fetchColumn();
+        parent::__construct($cms, $user_id);
+    }
+
+    /**
+     * new user
+     *
+     * save new user
+     * @access public
+     * @return boolean returns false on error
+     */
+    function newUser($ignore_encrypt_passwords = false)
+    {
+        global $connected_cms, $auth, $messages;
+
+        if ($this->getLoginData($this->login)) {
+            //automatische Zuordnung von bestehenden Ilias Accounts
+            //nur wenn ldap Modus benutzt wird und Stud.IP Nutzer passendes ldap plugin hat
+            if ($connected_cms[$this->cms_type]->USER_AUTO_CREATE == true &&
+            $connected_cms[$this->cms_type]->USER_PREFIX == '' &&
+            $this->auth_plugin &&
+            $this->auth_plugin != "standard" &&
+            $this->auth_plugin  == $connected_cms[$this->cms_type]->ldap_enable) {
+                if (!$this->external_password) {
+                    $this->setPassword(md5(uniqid("4dfmjsnll")));
+                }
+                $ok = $connected_cms[$this->cms_type]->soap_client->updatePassword($this->id, $this->external_password);
+                $this->setConnection($this->getUserType(), true);
+                if ($ok) {
+                    $messages["info"] .= sprintf(_("Verbindung mit Nutzer ID %s wiederhergestellt."), $this->id);
+                }
+                return true;
+            }
+            $messages["error"] .= sprintf(_("Es existiert bereits ein Account mit dem Benutzernamen \"%s\" (Account ID %s)."), $this->login, $this->id) . "<br>\n";
+            return false;
+        }
+
+        // data for user-account in ILIAS 4
+        $user_data["login"] = $this->login;
+        $user_data["passwd"] = $this->external_password;
+        $user_data["firstname"] = $this->firstname;
+        $user_data["lastname"] = $this->lastname;
+        $user_data["title"] = $this->title;
+        $user_data["gender"] = $this->gender;
+        $user_data["email"] = $this->email;
+        $user_data["street"] = $this->street;
+        $user_data["phone_home"] = $this->phone_home;
+        $user_data["time_limit_unlimited"] = 1;
+        $user_data["active"] = 1;
+        $user_data["approve_date"] = date('Y-m-d H:i:s');
+        $user_data["accepted_agreement"] = true;
+        // new values for ILIAS 4
+        $user_data["agree_date"] = date('Y-m-d H:i:s');
+        $user_data["external_account"] = $this->login;
+        if ($this->auth_plugin && $this->auth_plugin != "standard" &&  ($this->auth_plugin  == $connected_cms[$this->cms_type]->ldap_enable)) {
+            $user_data["auth_mode"] = "ldap";
+        } else {
+            $user_data["auth_mode"] = "default";
+        }
+        if ($connected_cms[$this->cms_type]->user_style != "") {
+            $user_data["user_style"] = $connected_cms[$this->cms_type]->user_style;
+        }
+        if ($connected_cms[$this->cms_type]->user_skin != "") {
+            $user_data["user_skin"] = $connected_cms[$this->cms_type]->user_skin;
+        }
+
+        $role_id = $connected_cms[$this->cms_type]->roles[$auth->auth["perm"]];
+
+        $user_id = $connected_cms[$this->cms_type]->soap_client->addUser($user_data, $role_id);
+
+        if ($user_id != false) {
+            $this->id = $user_id;
+
+            //            $connected_cms[$this->cms_type]->soap_client->updatePassword($user_id, $user_data["passwd"]);
+
+            //            $this->newUserCategory();
+
+            $this->setConnection(USER_TYPE_CREATED);
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * create new user category
+     *
+     * create new user category
+     * @access public
+     * @return boolean returns false on error
+     */
+    function newUserCategory()
+    {
+        global $connected_cms, $messages;
+
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+
+        // data for user-category in ILIAS 4
+        $object_data["title"] = sprintf(_("Eigene Daten von %s (%s)."), $this->getName(), $this->getId());
+        $object_data["description"] = sprintf(_("Hier befinden sich die persönlichen Lernmodule des Benutzers %s."), $this->getName());
+        $object_data["type"] = "cat";
+        $object_data["owner"] = $this->getId();
+
+        $cat = $connected_cms[$this->cms_type]->soap_client->getReferenceByTitle($object_data["title"]);
+        if ($cat != false && $connected_cms[$this->cms_type]->soap_client->checkReferenceById($cat) ) {
+            $messages["info"] .= sprintf(_("Ihre persönliche Kategorie wurde bereits angelegt."), $this->login) . "<br>\n";
+            $this->category = $cat;
+        } else {
+            $this->category = $connected_cms[$this->cms_type]->soap_client->addObject($object_data, $connected_cms[$this->cms_type]->user_category_node_id);
+        }
+        if ($this->category != false) {
+            parent::setConnection($this->getUserType(), true);
+        } else {
+            echo "CATEGORY_ERROR".$connected_cms[$this->cms_type]->user_category_node_id ."-";
+            return false;
+        }
+        // data for personal user-role in ILIAS 4
+        $role_data["title"] = "studip_usr" . $this->getId() . "_cat" . $this->category;
+        $role_data["description"] = sprintf(_("User-Rolle von %s. Diese Rolle wurde von Stud.IP generiert."), $this->getName());
+        $role_id = $connected_cms[$this->cms_type]->soap_client->getObjectByTitle($role_data["title"], "role");
+        if ($role_id != false) {
+            $messages["info"] .= sprintf(_("Ihre persönliche Userrolle wurde bereits angelegt."), $this->login) . "<br>\n";
+        } else {
+            $role_id = $connected_cms[$this->cms_type]->soap_client->addRoleFromTemplate($role_data, $this->category, $connected_cms[$this->cms_type]->user_role_template_id);
+        }
+        $connected_cms[$this->cms_type]->soap_client->addUserRoleEntry($this->getId(), $role_id);
+        // delete permissions for all global roles for this category
+        foreach ($connected_cms[$this->cms_type]->global_roles as $key => $role) {
+            $connected_cms[$this->cms_type]->soap_client->revokePermissions($role, $this->category);
+        }
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/lib/elearning/Ilias4ContentModule.class.php b/lib/elearning/Ilias4ContentModule.class.php
new file mode 100644
index 0000000..1d5392e
--- /dev/null
+++ b/lib/elearning/Ilias4ContentModule.class.php
@@ -0,0 +1,106 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+ * class to handle ILIAS 4 learning modules and tests
+ *
+ * This class contains methods to handle ILIAS 4 learning modules and tests.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4ContentModule
+ * @package    ELearning-Interface
+ */
+class Ilias4ContentModule extends Ilias3ContentModule
+{
+    var $object_id;
+
+    /**
+     * constructor
+     *
+     * init class.
+     * @access public
+     * @param string $module_id module-id
+     * @param string $module_type module-type
+     * @param string $cms_type system-type
+     */
+    function __construct($module_id = "", $module_type, $cms_type)
+    {
+        parent::__construct($module_id, $module_type, $cms_type);
+    }
+
+    /**
+     * set connection
+     *
+     * sets connection with seminar
+     * @access public
+     * @param string $seminar_id seminar-id
+     * @return boolean successful
+     */
+    function setConnection($seminar_id)
+    {
+        global $connected_cms, $messages;
+
+        $write_permission = Request::option("write_permission");
+
+        $crs_id = ObjectConnections::getConnectionModuleId($seminar_id, "crs", $this->cms_type);
+        $connected_cms[$this->cms_type]->soap_client->setCachingStatus(false);
+        $connected_cms[$this->cms_type]->soap_client->clearCache();
+
+        // Check, ob Kurs in ILIAS gelöscht wurde
+        if (($crs_id != false) AND ($connected_cms[$this->cms_type]->soap_client->getObjectByReference($crs_id) == false)) {
+            ObjectConnections::unsetConnection($seminar_id, $crs_id, "crs", $this->cms_type);
+            $messages["info"] .= _("Der zugeordnete ILIAS-Kurs (ID $crs_id) existiert nicht mehr. Ein neuer Kurs wird angelegt.") . "<br>";
+            $crs_id = false;
+        }
+
+        $crs_id == $connected_cms[$this->cms_type]->createCourse($seminar_id);
+
+        if ($crs_id == false) return false;
+
+        $ref_id = $this->getId();
+        if (Request::get("copy_object") == "1") {
+            $connected_cms[$this->cms_type]->soap_client->user_type = 'user';
+            $ref_id = $connected_cms[$this->cms_type]->soap_client->copyObject($this->id, $crs_id);
+            $connected_cms[$this->cms_type]->soap_client->user_type = 'admin';
+        } else {
+            $ref_id = $connected_cms[$this->cms_type]->soap_client->addReference($this->id, $crs_id);
+        }
+        if (!$ref_id) {
+            $messages["error"] .= _("Zuordnungs-Fehler: Objekt konnte nicht angelegt werden.");
+            return false;
+        }
+        $local_roles = $connected_cms[$this->cms_type]->soap_client->getLocalRoles($crs_id);
+        $member_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ]);
+        $admin_operations = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ, OPERATION_WRITE, OPERATION_DELETE]);
+        $admin_operations_no_delete = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ, OPERATION_WRITE]);
+        $admin_operations_readonly = $connected_cms[$this->cms_type]->permissions->getOperationArray([OPERATION_VISIBLE, OPERATION_READ, OPERATION_DELETE]);
+        foreach ($local_roles as $key => $role_data) {
+            // check only if local role is il_crs_member, -tutor or -admin
+            if (mb_strpos($role_data["title"], "il_crs_") === 0) {
+                if(mb_strpos($role_data["title"], 'il_crs_member') === 0){
+                    $operations = ($write_permission == "autor") ? $admin_operations_no_delete : $member_operations;
+                } elseif(mb_strpos($role_data["title"], 'il_crs_tutor') === 0){
+                    $operations = (($write_permission == "tutor") || ($write_permission == "autor")) ? $admin_operations : $admin_operations_readonly;
+                } elseif(mb_strpos($role_data["title"], 'il_crs_admin') === 0){
+                    $operations = (($write_permission == "dozent") || ($write_permission == "tutor") || ($write_permission == "autor")) ? $admin_operations : $admin_operations_readonly;
+                } else {
+                    continue;
+                }
+                $connected_cms[$this->cms_type]->soap_client->revokePermissions($role_data["obj_id"], $ref_id);
+                $connected_cms[$this->cms_type]->soap_client->grantPermissions($operations, $role_data["obj_id"], $ref_id);
+            }
+        }
+        if ($ref_id) {
+            $this->setId($ref_id);
+            return ContentModule::setConnection($seminar_id);
+        } else {
+            $messages["error"] .= _("Die Zuordnung konnte nicht gespeichert werden.");
+        }
+        return false;
+    }
+}
\ No newline at end of file
diff --git a/lib/elearning/Ilias4Soap.class.php b/lib/elearning/Ilias4Soap.class.php
new file mode 100644
index 0000000..d6d2527
--- /dev/null
+++ b/lib/elearning/Ilias4Soap.class.php
@@ -0,0 +1,185 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+ * class to use ILIAS-4-Webservices
+ *
+ * This class contains methods to connect to the ILIAS-4-Soap-Server.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4Soap
+ * @package    ELearning-Interface
+ */
+class Ilias4Soap extends Ilias3Soap
+{
+    var $cms_type;
+    var $admin_sid;
+    var $user_sid;
+    var $user_type;
+    var $soap_cache;
+    var $separator_string;
+
+    /**
+     * constructor
+     *
+     * init class.
+     * @access
+     * @param string $cms system-type
+     */
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+        $this->seperator_string = " / ";
+    }
+
+    /**
+     * add user by importUsers
+     *
+     * adds new user and sets role-id
+     * @access public
+     * @param array user_data user-data
+     * @param string role_id global role-id for new user
+     * @return string user-id
+     */
+    function addUser($user_data, $role_id)
+    {
+        foreach($user_data as $key => $value) {
+            $user_data[$key] = htmlReady($user_data[$key]);
+        }
+
+        $usr_xml = "<Users>
+<User>
+<UDFDefinitions></UDFDefinitions>
+<Login>".$user_data["login"]."</Login>
+<Password Type=\"PLAIN\">".$user_data["passwd"]."</Password>
+<Firstname>".$user_data["firstname"]."</Firstname>
+<Lastname>".$user_data["lastname"]."</Lastname>
+<Title>".$user_data["title"]."</Title>
+<Gender>".$user_data["gender"]."</Gender>
+<Email>".$user_data["email"]."</Email>
+<Street>".$user_data["street"]."</Street>
+<PhoneHome>".$user_data["phone_home"]."</PhoneHome>
+<Role Id=\"".$role_id."\" Type=\"Global\"/>
+<Active>true</Active>
+<TimeLimitUnlimited>".$user_data["time_limit_unlimited"]."</TimeLimitUnlimited>
+<TimeLimitMessage>0</TimeLimitMessage>
+<ApproveDate>".$user_data["approve_date"]."</ApproveDate>
+<AgreeDate>".$user_data["agree_date"]."</AgreeDate>";
+        if (($user_data["user_skin"] != "") OR ($user_data["user_style"] != "")) {
+            $usr_xml .= "<Look Skin=\"".$user_data["user_skin"]."\" Style=\"".$user_data["user_style"]."\"/>";
+        }
+        $usr_xml .= "<AuthMode type=\"".$user_data["auth_mode"]."\"/>
+<ExternalAccount>".$user_data["external_account"]."</ExternalAccount>
+</User>
+</Users>";
+
+        $param = [
+            'sid' => $this->getSID(),
+            'folder_id' => -1,
+            'usr_xml' => $usr_xml,
+            'conflict_role' => 1,
+            'send_account_mail' => 0
+        ];
+        $result = $this->call('importUsers', $param);
+
+        $s = simplexml_load_string($result);
+
+        if ((string)$s->rows->row->column[3] == "successful")
+        return (string)$s->rows->row->column[0];
+        else
+        return false;
+    }
+
+    /**
+     * copy object
+     *
+     * copy ilias-object
+     * @access public
+     * @param string source_id reference-id
+     * @param string target_id reference-id
+     * @return string result
+     */
+    function copyObject($source_id, $target_id)
+    {
+        $type = $object_data["type"];
+        $title = $object_data["title"];
+        $description = $object_data["description"];
+
+        $xml = "<Settings source_id=\"$source_id\" target_id=\"$target_id\" default_action=\"COPY\"/>";
+
+        $param = [
+            'sid' => $this->getSID(),
+            'xml' => $xml
+        ];
+        return $this->call('copyObject', $param);
+    }
+
+    /**
+     * get path
+     *
+     * returns repository-path to ilias-object
+     * @access public
+     * @param string source_id reference-id
+     * @param string target_id reference-id
+     * @return string result
+     */
+    function getPath($ref_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id
+        ];
+        $result = $this->call('getPathForRefId', $param);
+
+        if ($result) {
+            $s = simplexml_load_string($result);
+
+            foreach ($s->rows->row as $row) {
+                $path[] = (string)$row->column[2];
+            }
+        }
+
+        if (is_array($path)) {
+            return implode($path, $this->seperator_string);
+        } else {
+            return false;
+        }
+    }
+
+     /**
+     *
+     * returns repository-path to ilias-object
+     *
+     * @access public
+     * @param string source_id reference-id
+     * @param string target_id reference-id
+     * @return string result
+     */
+    function getRawPath($ref_id)
+    {
+        $param = [
+            'sid' => $this->getSID(),
+            'ref_id' => $ref_id
+        ];
+        $result = $this->call('getPathForRefId', $param);
+
+        if ($result) {
+            $s = simplexml_load_string($result);
+
+            foreach ($s->rows->row as $row) {
+                $path[] = (string)$row->column[0];
+            }
+        }
+
+        if (is_array($path)) {
+            return implode($path, '_');
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/lib/elearning/Ilias5ConnectedCMS.class.php b/lib/elearning/Ilias5ConnectedCMS.class.php
new file mode 100644
index 0000000..011d046
--- /dev/null
+++ b/lib/elearning/Ilias5ConnectedCMS.class.php
@@ -0,0 +1,21 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/**
+ * main-class for connection to ILIAS 5.2
+ *
+ * This class contains the main methods of the elearning-interface to connect to ILIAS 5. Extends Ilias3ConnectedCMS.
+ *
+ * @author   Arne Schröder <schroeder@data-quest.de>
+ * @access   public
+ * @modulegroup  elearning_interface_modules
+ * @module       Ilias5ConnectedCMS
+ * @package  ELearning-Interface
+ */
+class Ilias5ConnectedCMS extends Ilias4ConnectedCMS
+{
+
+}
diff --git a/lib/elearning/Ilias5ConnectedLink.class.php b/lib/elearning/Ilias5ConnectedLink.class.php
new file mode 100644
index 0000000..0ce4a0f
--- /dev/null
+++ b/lib/elearning/Ilias5ConnectedLink.class.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * class to generate links to ILIAS 5.2
+ *
+ * This class contains methods to generate links to ILIAS 5.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias5ConnectedLink
+ * @package    ELearning-Interface
+ */
+class Ilias5ConnectedLink extends Ilias4ConnectedLink
+{
+}
+?>
\ No newline at end of file
diff --git a/lib/elearning/Ilias5ConnectedPermissions.class.php b/lib/elearning/Ilias5ConnectedPermissions.class.php
new file mode 100644
index 0000000..17d6f0d
--- /dev/null
+++ b/lib/elearning/Ilias5ConnectedPermissions.class.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * class to handle ILIAS 5.2 access controls
+ *
+ * This class contains methods to handle permissions on connected objects.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias4ConnectedPermission
+ * @package    ELearning-Interface
+ */
+class Ilias5ConnectedPermissions extends Ilias4ConnectedPermissions
+{
+
+}
+?>
\ No newline at end of file
diff --git a/lib/elearning/Ilias5ConnectedUser.class.php b/lib/elearning/Ilias5ConnectedUser.class.php
new file mode 100644
index 0000000..6172976
--- /dev/null
+++ b/lib/elearning/Ilias5ConnectedUser.class.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * class to handle ILIAS 5.2 user-accounts
+ *
+ * This class contains methods to handle connected ILIAS 5 user-accounts.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias5ConnectedUser
+ * @package    ELearning-Interface
+ */
+class Ilias5ConnectedUser extends Ilias4ConnectedUser
+{
+
+    /**
+    * verify login data
+    *
+    * returns true, if login-data is valid
+    * @access public
+    * @param string $username username
+    * @param string $password password
+    * @return boolean login-validation
+    */
+    function verifyLogin($username, $password)
+    {
+        global $connected_cms, $messages;
+        $result = $connected_cms[$this->cms_type]->soap_client->checkPassword($username, $password);
+        if (strpos($result, '::') > 0) {
+            return $this->getLoginData($username);
+        }
+        return false;
+    }
+
+    function setConnection($user_type, $ignore_encrypted_passwords = false)
+    {
+        $this->external_password = '';
+        parent::setConnection($user_type, true);
+    }
+}
\ No newline at end of file
diff --git a/lib/elearning/Ilias5ContentModule.class.php b/lib/elearning/Ilias5ContentModule.class.php
new file mode 100644
index 0000000..3f50c02
--- /dev/null
+++ b/lib/elearning/Ilias5ContentModule.class.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * class to handle ILIAS 5.2 learning modules and tests
+ *
+ * This class contains methods to handle ILIAS 5 learning modules and tests.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias5ContentModule
+ * @package    ELearning-Interface
+ */
+class Ilias5ContentModule extends Ilias4ContentModule
+{
+
+}
\ No newline at end of file
diff --git a/lib/elearning/Ilias5Soap.class.php b/lib/elearning/Ilias5Soap.class.php
new file mode 100644
index 0000000..80c683d
--- /dev/null
+++ b/lib/elearning/Ilias5Soap.class.php
@@ -0,0 +1,114 @@
+<?php
+/**
+ * class to use ILIAS-5-Webservices
+ *
+ * This class contains methods to connect to the ILIAS-5-Soap-Server.
+ *
+ * @author    Arne Schröder <schroeder@data-quest.de>
+ * @access    public
+ * @modulegroup    elearning_interface_modules
+ * @module        Ilias5Soap
+ * @package    ELearning-Interface
+ */
+class Ilias5Soap extends Ilias4Soap
+{
+    var $cms_type;
+    var $admin_sid;
+    var $user_sid;
+    var $user_type;
+    var $soap_cache;
+    var $separator_string;
+
+    /**
+     * call soap-function
+     *
+     * calls soap-function with given parameters
+     * @access public
+     * @param string method method-name
+     * @param string params parameters
+     * @return mixed result
+     */
+    function call($method, $params)
+    {
+        $index = md5($method . ":" . implode($params, "-"));
+        // return false if no session_id is given
+        if (($method != "login") AND ($params["sid"] == ""))
+            return false;
+//      echo $this->caching_active;
+        if (($this->caching_active == true) AND (isset($this->soap_cache[$index])))
+        {
+//          echo $index;
+//          echo " from Cache<br>";
+            $result = $this->soap_cache[$index];
+        }
+        else
+        {
+            $result = $this->_call($method, $params);
+            // if Session is expired, re-login and try again
+            if (($method != "login") AND $this->soap_client->fault AND in_array(mb_strtolower($this->faultstring), ["session not valid","session invalid", "session idled"]) )
+            {
+                $caching_status = $this->caching_active;
+                $this->caching_active = false;
+                $user_type = $this->user_type;
+                $this->user_type = 'admin';
+                $params["sid"] = $this->login();
+                $result = $this->_call($method, $params);
+                $this->caching_active = $caching_status;
+                $this->user_type = $user_type;
+            }
+            elseif (! $this->soap_client->fault)
+                $this->soap_cache[$index] = $result;
+        }
+        return $result;
+    }
+
+    /**
+    * login
+    *
+    * login to soap-webservice
+    * @access public
+    * @return string result
+    */
+    function login()
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        if ($this->user_type == "admin") {
+            $param = [
+                'client' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["client"],
+                'username' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["username"],
+                'password' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["password"]
+                ];
+            $result = $this->call('login', $param);
+        } elseif ($this->user_type == "user") {
+            $param = [
+                'sid' => $this->admin_sid,
+                'user_id' => $connected_cms[$this->cms_type]->user->getId()
+                ];
+            $result = $this->call('loginStudipUser', $param);
+        }
+        if ($this->user_type == "admin")
+            $this->admin_sid = $result;
+        if ($this->user_type == "user")
+            $this->user_sid = $result;
+        return $result;
+    }
+
+    /**
+    * Check Auth
+    *
+    * login to soap-webservice
+    * @access public
+    * @return string result
+    */
+    function checkPassword($username, $password)
+    {
+        global $ELEARNING_INTERFACE_MODULES, $connected_cms;
+        $param = [
+            'client' => $ELEARNING_INTERFACE_MODULES[$this->cms_type]["soap_data"]["client"],
+            'username' => $username,
+            'password' => $password
+        ];
+        $result = $this->call('login', $param);
+        return $result;
+    }
+}
\ No newline at end of file
diff --git a/lib/elearning/LonCapaConnectedCMS.class.php b/lib/elearning/LonCapaConnectedCMS.class.php
new file mode 100644
index 0000000..2f86aa8
--- /dev/null
+++ b/lib/elearning/LonCapaConnectedCMS.class.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * main-class for connection to LonCapa
+ *
+ * This class contains the main methods of the elearning-interface to connect to
+ * LonCapa. Extends ConnectedCMS.
+ *
+ * @access   public
+ * @modulegroup  elearning_interface_modules
+ * @module       LonCapaConnectedCMS
+ * @package  ELearning-Interface
+ */
+class LonCapaConnectedCMS extends ConnectedCMS
+{
+    public $user;
+    protected $seminarId;
+    protected $lcRequest;
+    protected $cmsUrl;
+
+    public function __construct($cms = '')
+    {
+        parent::__construct($cms);
+
+        $this->seminarId = Context::getId();
+        $this->user = User::findCurrent();
+        $this->lcRequest = new LonCapaRequest();
+        $this->cmsUrl = $this->ABSOLUTE_PATH_ELEARNINGMODULES;
+    }
+
+
+    /**
+     * search for content modules
+     *
+     * returns found content modules
+     * @throws AccessDeniedException
+     * @param string $key keyword
+     * @return array list of content modules
+     */
+    public function searchContentModules($key)
+    {
+
+        if (!$GLOBALS['perm']->have_studip_perm('tutor', $this->seminarId)) {
+            throw new AccessDeniedException();
+        }
+
+        $url = $this->cmsUrl . '/courses?search=' . urlencode($key) . '&owner=' . urlencode($this->user->username);
+        $response = $this->lcRequest->request($url);
+
+        if ($response) {
+            $courses = new SimpleXMLElement($response);
+
+            $result = [];
+            foreach ($courses->course as $course) {
+                $temp = explode(':', (string)$course->owner);
+
+                $result[] = [
+                    'ref_id'  => (string)$course->id,
+                    'title'   => (string)$course->description,
+                    'authors' => $temp[0],
+                    'type'    => $this->cms_type
+                ];
+            }
+        }
+
+        return $result;
+    }
+}
diff --git a/lib/elearning/LonCapaConnectedLink.class.php b/lib/elearning/LonCapaConnectedLink.class.php
new file mode 100644
index 0000000..c00958b
--- /dev/null
+++ b/lib/elearning/LonCapaConnectedLink.class.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ *
+ * This class contains methods to generate links to LonCapa
+ *
+ * @modulegroup  elearning_interface_modules
+ * @module       LonCapaConnectedLink
+ * @package  ELearning-Interface
+ */
+class LonCapaConnectedLink extends ConnectedLink
+{
+    /**
+     * get user module links
+     *
+     * returns content module links for user
+     * @return string html-code
+     */
+    public function getUserModuleLinks()
+    {
+        global $connected_cms, $current_module;
+
+        $url = URLHelper::getURL('dispatch.php/loncapa/enter', ['cms_type' => $this->cms_type, 'module' => $current_module]);
+
+        return Studip\LinkButton::create(_('Starten'), $url, [
+            'target' => '_blank',
+            'rel'    => 'noopener noreferrer',
+        ]);
+    }
+
+    /**
+     * get admin module links
+     *
+     * returns links add or remove a module from course
+     * @return string returns html-code
+     */
+    public function getAdminModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+        global $template_factory;
+
+        $template = $template_factory->open('elearning/loncapa_connected_link_edit');
+        $template->current_module = $connected_cms[$this->cms_type]->content_module[$current_module]->getId();
+        $template->connected = $connected_cms[$this->cms_type]->content_module[$current_module]->isConnected();
+        $template->cms_type = $this->cms_type;
+        $template->search_key = $search_key;
+        return $template->render(compact('view', 'search_key', 'cms_select', 'current_module'));
+    }
+
+    /**
+     * returns url for connected LonCapa course
+     *
+     * @param string $module_id LonCapa ID
+     * @param string $course_id Stud.IP course ID
+     * @return string url for LonCapa
+     */
+    public function getRedirectUrl($module_id, $course_id)
+    {
+        return sprintf(
+            '%s/enter/%s?token=%s&courseid=%s&systemid=%s',
+            $this->cms_link,
+            $module_id,
+            Token::create(60),
+            $course_id,
+            $this->cms_type
+        );
+    }
+}
diff --git a/lib/elearning/LonCapaContentModule.class.php b/lib/elearning/LonCapaContentModule.class.php
new file mode 100644
index 0000000..70976cc
--- /dev/null
+++ b/lib/elearning/LonCapaContentModule.class.php
@@ -0,0 +1,86 @@
+<?php
+/**
+ *
+ * This class contains methods to handle LonCapa learning modules
+ *
+ * @modulegroup  elearning_interface_modules
+ * @module       LonCapaContentModule
+ * @package  ELearning-Interface
+ */
+
+class LonCapaContentModule extends ContentModule
+{
+    /**
+     * @var LonCapaRequest
+     */
+    public $lcRequest;
+    /**
+     * @var string
+     */
+    public $cmsUrl;
+
+    /**
+     * LonCapaContentModule constructor.
+     * @param string $module_id
+     * @param string $module_type
+     * @param string $cms_type
+     */
+    public function __construct($module_id = "", $module_type, $cms_type)
+    {
+        $this->lcRequest = new LonCapaRequest();
+        $this->cmsUrl = $GLOBALS['ELEARNING_INTERFACE_MODULES'][$cms_type]['ABSOLUTE_PATH_ELEARNINGMODULES'];
+
+        parent::__construct($module_id, $module_type, $cms_type);
+    }
+
+    /**
+     *fetch data from LonCapa
+     *
+     */
+    public function readData()
+    {
+        $url = $this->cmsUrl . '/course/' . urlencode($this->id);
+        $response = $this->lcRequest->request($url);
+
+        if ($response) {
+            $courses = new SimpleXMLElement($response);
+            $course = $courses->course[0];
+
+            list($author, $dummy) = explode(':', (string)$course->owner);
+
+            $this->id = (string)$course->id;
+            $this->title = (string)$course->description;
+            $this->authors = $author;
+        }
+
+    }
+
+    /**
+     * get permission-status
+     *
+     *
+     * @param string $operation operation
+     * @return boolean allowed
+     */
+    public function isAllowed($operation)
+    {
+        return true;
+    }
+
+    /**
+     * store connection between Stud.IP course and LonCapa course
+     *
+     * @param string $seminar_id
+     * @return bool
+     */
+    public function setConnection($seminar_id)
+    {
+        $this->is_connected = true;
+        return ObjectConnections::setConnection(
+            $seminar_id,
+            $this->id,
+            $this->module_type,
+            $this->cms_type
+        );
+    }
+}
diff --git a/lib/elearning/LonCapaRequest.class.php b/lib/elearning/LonCapaRequest.class.php
new file mode 100644
index 0000000..ecf3075
--- /dev/null
+++ b/lib/elearning/LonCapaRequest.class.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ *
+ * This class is used to communicate with LonCapa
+ *
+ * @depends curl
+ * @modulegroup  elearning_interface_modules
+ * @module       LonCapaContentModule
+ * @package  ELearning-Interface
+ */
+class LonCapaRequest
+{
+    /**
+     * options for curl
+     * @var array
+     */
+    protected $options;
+    /**
+     * curl resource
+     * @var resource
+     */
+    protected $ch;
+
+    /**
+     * LonCapaRequest constructor.
+     */
+    public function __construct()
+    {
+        $this->ch = curl_init();
+        $this->initOptions();
+    }
+
+    /**
+     * initializes curl options
+     */
+    public function initOptions()
+    {
+        $this->options = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_FOLLOWLOCATION => true,
+            //CURLOPT_CAINFO => '',
+            CURLOPT_SSL_VERIFYPEER => false,
+            CURLOPT_SSL_VERIFYHOST => false
+        ];
+    }
+
+    /**
+     * close connection
+     */
+    public function __destruct()
+    {
+        curl_close($this->ch);
+    }
+
+    /**
+     * set curl options
+     * @param $key
+     * @param $value
+     */
+    public function setOption($key, $value)
+    {
+        $this->options[$key] = $value;
+    }
+
+    /**
+     * do a curl request on the given url and return the result if successfull
+     *
+     * @param $url string
+     * @param array $postfields
+     * @return string
+     */
+    public function request($url, $postfields = null)
+    {
+        $result = $this->sendRequest($url, $postfields);
+        if ($result['statusCode'] == 200) {
+            return $result['response'];
+        } else {
+            // TODO: fehlermeldung wäre schöner
+            return null;
+        }
+    }
+
+    /**
+     * do a curl request on the given url and return the result if successfull
+     * @param $url string
+     * @param array $postfields
+     * @return array
+     */
+    protected function sendRequest($url, $postfields = null)
+    {
+        $options = $this->options;
+        $options[CURLOPT_URL] = $url;
+
+        if ($postfields) {
+            $options[CURLOPT_POST] = true;
+            $options[CURLOPT_POSTFIELDS] = $postfields;
+        }
+
+        curl_setopt_array($this->ch, $options);
+        $response = curl_exec($this->ch);
+
+        $statusCode = curl_getinfo($this->ch, CURLINFO_HTTP_CODE);
+
+        if ($response === false) {
+            $last_error = curl_error($this->ch);
+            Log::error(__CLASS__ . ' curl_exec failed: ' . $last_error);
+        }
+        return compact('statusCode', 'response');
+    }
+}
diff --git a/lib/elearning/ObjectConnections.class.php b/lib/elearning/ObjectConnections.class.php
new file mode 100644
index 0000000..fc28b9b
--- /dev/null
+++ b/lib/elearning/ObjectConnections.class.php
@@ -0,0 +1,256 @@
+<?php
+# Lifter002: DONE
+# Lifter003: TEST
+# Lifter007: TODO
+# Lifter010: TODO
+/**
+* class to handle object connections
+*
+* This class contains methods to handle connections between stud.ip-objects and external content.
+*
+* @author   Arne Schröder <schroeder@data-quest.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       ObjectConnections
+* @package  ELearning-Interface
+*/
+class ObjectConnections
+{
+    var $id;
+    var $object_connections;
+    /**
+    * constructor
+    *
+    * init class.
+    * @access public
+    * @param string $object_id object-id
+    */
+    function __construct($object_id = "")
+    {
+        $this->id = $object_id;
+        if ($object_id != "")
+            $this->readData();
+    }
+
+    /**
+    * read object connections
+    *
+    * gets object connections from database
+    * @access public
+    */
+    function readData()
+    {
+        global $ELEARNING_INTERFACE_MODULES;
+
+        $this->object_connections = [];
+
+        $query = "SELECT system_type, module_type, module_id, chdate
+                  FROM object_contentmodules
+                  WHERE object_id = ?
+                  ORDER BY chdate DESC";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$this->id]);
+
+        $module_count = 0;
+        while ($row = $statement->fetch(PDO::FETCH_ASSOC)) {
+            // show only connected modules with valid module-type
+            if ($ELEARNING_INTERFACE_MODULES[$row['system_type']]['types'][$row['module_type']] == '') {
+                continue;
+            }
+            $module_count += 1;
+            $d_system_type = $row['system_type'];
+            $d_module_type = $row['module_type'];
+            $d_module_id   = $row['module_id'];
+
+            $reference = $d_system_type . '_' . $d_module_type . '_' . $d_module_id;
+            $this->object_connections[$reference]['cms']    = $d_system_type;
+            $this->object_connections[$reference]['type']   = $d_module_type;
+            $this->object_connections[$reference]['id']     = $d_module_id;
+            $this->object_connections[$reference]['chdate'] = $row['chdate'];
+        }
+
+        if ($module_count == 0) {
+            $this->object_connections = false;
+        }
+    }
+
+    /**
+    * get object connections
+    *
+    * returns object connections
+    * @access public
+    * @return array object connections
+    */
+    function getConnections()
+    {
+        return $this->object_connections;
+    }
+
+    /**
+    * get connection-status
+    *
+    * returns true, if object has connections
+    * @access public
+    * @return boolean connection-status
+    */
+    function isConnected()
+    {
+        return (boolean) $this->object_connections;
+    }
+
+    /**
+     * get connection-status
+     *
+     * returns true, if object has connections
+     * @access public
+     * @param string $object_id object-id (optional)
+     * @return boolean connection-status
+     */
+    public static function isObjectConnected($object_id = null)
+    {
+        if (isset($object_id)) {
+            $query = "SELECT 1 FROM object_contentmodules WHERE object_id = ?";
+            $statement = DBManager::get()->prepare($query);
+            $statement->execute([$object_id]);
+            return (bool)$statement->fetchColumn();
+        }
+    }
+
+    /**
+    * get module-id
+    *
+    * returns module-id of given connection
+    * @access public
+    * @param string $connection_object_id object-id
+    * @param string $connection_module_type module-type
+    * @param string $connection_cms system-type
+    * @return string module-id
+    */
+    public static function getConnectionModuleId($connection_object_id, $connection_module_type, $connection_cms)
+    {
+        $query = "SELECT module_id
+                  FROM object_contentmodules
+                  WHERE object_id = ? AND system_type = ? AND module_type = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([
+            $connection_object_id,
+            $connection_cms,
+            $connection_module_type
+        ]);
+        return $statement->fetchColumn() ?: false;
+    }
+
+    /**
+    * set connection
+    *
+    * sets connection with object
+    * @access public
+    * @param string $connection_object_id object-id
+    * @param string $connection_module_id module-id
+    * @param string $connection_module_type module-type
+    * @param string $connection_cms system-type
+    * @return boolean successful
+    */
+    public static function setConnection($connection_object_id, $connection_module_id, $connection_module_type, $connection_cms)
+    {
+        $query = "SELECT 1
+                  FROM object_contentmodules
+                  WHERE object_id = ? AND module_id = ? AND system_type = ?
+                    AND module_type = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([
+            $connection_object_id,
+            $connection_module_id,
+            $connection_cms,
+            $connection_module_type
+        ]);
+        $check = $statement->fetchColumn();
+
+        if ($check) {
+            $query = "UPDATE object_contentmodules
+                      SET module_type = ?, chdate = UNIX_TIMESTAMP()
+                      WHERE object_id = ? AND module_id = ? AND system_type = ?";
+            $statement = DBManager::get()->prepare($query);
+            $statement->execute([
+                $connection_module_type,
+                $connection_object_id,
+                $connection_module_id,
+                $connection_cms
+            ]);
+        } else {
+            $query = "INSERT INTO object_contentmodules
+                        (object_id, module_id, system_type, module_type, mkdate, chdate)
+                      VALUES (?, ?, ?, ?, UNIX_TIMESTAMP(), UNIX_TIMESTAMP())";
+            $statement = DBManager::get()->prepare($query);
+            $statement->execute([
+                $connection_object_id,
+                $connection_module_id,
+                $connection_cms,
+                $connection_module_type
+            ]);
+        }
+        return true;
+    }
+
+    /**
+    * unset connection
+    *
+    * deletes connection with object
+    * @access public
+    * @param string $connection_object_id object-id
+    * @param string $connection_module_id module-id
+    * @param string $connection_module_type module-type
+    * @param string $connection_cms system-type
+    * @return boolean successful
+    */
+    public static function unsetConnection($connection_object_id, $connection_module_id, $connection_module_type, $connection_cms)
+    {
+        $query = "SELECT 1
+                  FROM object_contentmodules
+                  WHERE object_id = ? AND module_id = ? AND system_type = ?
+                    AND module_type = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([
+            $connection_object_id,
+            $connection_module_id,
+            $connection_cms,
+            $connection_module_type
+        ]);
+        $check = $statement->fetchColumn();
+
+
+        if ($check) {
+            $query = "DELETE FROM object_contentmodules
+                      WHERE object_id = ? AND module_id = ? AND system_type = ?
+                        AND module_type = ?";
+            $statement = DBManager::get()->prepare($query);
+            $statement->execute([
+                $connection_object_id,
+                $connection_module_id,
+                $connection_cms,
+                $connection_module_type
+            ]);
+            return true;
+        }
+        return false;
+    }
+
+    public static function GetConnectedSystems($object_id)
+    {
+        $query = "SELECT DISTINCT system_type
+                  FROM object_contentmodules
+                  WHERE object_id = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$object_id]);
+        return $statement->fetchAll(PDO::FETCH_COLUMN);
+    }
+
+    public static function DeleteAllConnections($object_id, $cms_type)
+    {
+        $query = "DELETE FROM object_contentmodules
+                  WHERE object_id = ? AND system_type = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$object_id, $cms_type]);
+        return $statement->rowCount();
+    }
+}
diff --git a/lib/elearning/PmWikiConnectedCMS.class.php b/lib/elearning/PmWikiConnectedCMS.class.php
new file mode 100644
index 0000000..5c123be
--- /dev/null
+++ b/lib/elearning/PmWikiConnectedCMS.class.php
@@ -0,0 +1,84 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/*
+ * PmWikiConnectedCMS.class.php - Provides search capabilities
+ * to search WikiFarm
+ *
+ * Copyright (C) 2006 - Marco Diedrich (mdiedric@uos.de)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+require_once 'clients/xml_rpc_webservice_client.php';
+require_once 'clients/soap_webservice_client.php';
+require_once 'clients/webservice_client.php';
+
+/**
+* main-class for connection to PmWiki
+*
+* This class contains the main methods of the elearning-interface to connect to PmWiki. Extends ConnectedCMS.
+*
+* @author   Marco Diedrich <mdiedric@uos.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       PmWikiConnectedCMS
+* @package  ELearning-Interface
+*/
+
+class PmWikiConnectedCMS extends ConnectedCMS
+{
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+        $this->client = WebserviceClient::instance( $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['ABSOLUTE_PATH_SOAP'] .
+                                                                                                '?' . $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['URL_PARAMS'],
+                                                                                                $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['WEBSERVICE_CLASS']);
+
+        $this->api_key = $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['soap_data']['api-key'];
+    }
+    
+    function init($cms)
+    {
+        parent::init($cms);
+        $this->field_script = $GLOBALS['ELEARNING_INTERFACE_MODULES'][$cms]["field_script"];
+    }
+
+    /**
+    * search for content modules
+    *
+    * returns found content modules
+    * @access public
+    * @param string $key keyword
+    * @return array list of content modules
+    */
+
+    function searchContentModules($key)
+    {
+        $fields_found = $this->client->call("search_content_modules", $args = [
+                $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['soap_data']['api-key'], 
+                $key]); 
+
+        $result = [];
+
+        foreach($fields_found as $field)
+        {
+
+            $result[$field['field_id']] = [    'ref_id'            => $field['field_id'], 
+                                                                                        'type'              => $field['field_type'],
+                                                                                        'obj_id'            => $field_id,
+                                                                                        'create_date' => $field['create_date'],
+                                                                                        'last_update' => $field['change_date'],
+                                                                                        'title'             => $field['field_title'], 
+                                                                                        'description' => $field['field_description']];
+        }
+        return $result;
+    }
+
+}
diff --git a/lib/elearning/PmWikiConnectedLink.class.php b/lib/elearning/PmWikiConnectedLink.class.php
new file mode 100644
index 0000000..8ed7416
--- /dev/null
+++ b/lib/elearning/PmWikiConnectedLink.class.php
@@ -0,0 +1,134 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/*
+ * PmWikiConnectedLink.class.php - Provides links to PmWiki Modules
+ *
+ * Copyright (C) 2006 - Marco Diedrich (mdiedric@uos.de)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+use Studip\Button, Studip\LinkButton;
+
+require_once 'lib/webservices/api/studip_seminar.php';
+
+/**
+*
+* This class contains methods to generate links to PmWiki-Farm
+*
+* @author   Marco Diedrich <mdiedric@uos.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       PmWikiConnectedLink
+* @package  ELearning-Interface
+*/
+
+class PmWikiConnectedLink extends ConnectedLink
+{
+    function __construct($cms)
+    {
+        parent::__construct($cms);
+        $this->cms_link = "pmwiki_referrer.php";
+    }
+
+    /**
+    * get user module links
+    *
+    * returns content module links for user
+    * @access public
+    * @return string html-code
+    */
+
+    function getUserModuleLinks()
+    {
+        $range_id = Context::getId();
+        $username = get_username($GLOBALS['auth']->auth['uid']);
+
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        // hier muss die Authentifizierung mit übergeben werden...
+        //
+        if (Context::isCourse()) {
+            $context = 'seminar';
+
+            $status = StudipSeminarHelper::get_user_status($username, $range_id);
+
+        } else if (Context::isInstitute()) {
+            $context = 'institute';
+
+            $status = StudipInstituteHelper::get_user_status($username, $range_id);
+        }
+
+        ob_start(); ?>
+        <form method="post" target="_blank" rel="noopener noreferrer"
+              action="<?= $connected_cms[$this->cms_type]->content_module[$current_module]->link ?>">
+
+            <?= CSRFProtection::tokenTag() ?>
+            <input type='hidden'    name='authid'           value='<?= htmlReady($GLOBALS['auth']->auth['uname']) ?>'>
+            <input type='hidden'    name='authpw'           value='<?= htmlReady(Token::create()) ?>'>
+            <input type='hidden'    name='_permission'  value='<?= htmlReady($status) ?>'>
+            <input type='hidden'    name='_range_id'        value='<?= htmlReady($range_id) ?>'>
+            <input type='hidden'    name='_server'          value='<?= htmlReady(Config::get()->STUDIP_INSTALLATION_ID) ?>'>
+            <input type='hidden'    name='_context'         value='<?= htmlReady($context) ?>'>
+            <?= Button::createAccept(_('Starten')) ?>
+
+        </form>
+
+        <?php
+
+        $output = ob_get_contents();
+        ob_end_clean();
+        return $output;
+    }
+
+    /**
+    * get admin module links
+    *
+    * returns links add or remove a module from course
+    * @access public
+    * @return string returns html-code
+    */
+
+    function getAdminModuleLinks()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        ob_start(); ?>
+
+        <form method="post" action="<?= URLHelper::getLink() ?>">
+            <?= CSRFProtection::tokenTag() ?>
+            <input type="hidden"    name="view"                             value="<?= htmlReady($view) ?>">
+            <input type="hidden"    name="search_key"               value="<?= htmlReady($search_key) ?>">
+            <input type="hidden"    name="cms_select"               value="<?= htmlReady($cms_select) ?>">
+            <input type="hidden"    name="module_type"              value="wiki">
+            <input type="hidden"    name="module_id"                    value="<?= htmlReady($current_module) ?>">
+            <input type="hidden"    name="module_system_type" value="<?= htmlReady($this->cms_type) ?>">
+
+            <?php if ($connected_cms[$this->cms_type]->content_module[$current_module]->isConnected()) : ?>
+
+                &nbsp;<?= Button::create(_('Entfernen'), 'remove') ?>
+
+            <?php else :?>
+
+                &nbsp;<?= Button::create(_('Hinzufügen'), 'add') ?>
+
+            <?php endif ; ?>
+
+        </form>
+        <?php
+
+        $output = ob_get_contents();
+
+        ob_end_clean();
+
+        return $output;
+    }
+
+}
diff --git a/lib/elearning/PmWikiContentModule.class.php b/lib/elearning/PmWikiContentModule.class.php
new file mode 100644
index 0000000..e16756a
--- /dev/null
+++ b/lib/elearning/PmWikiContentModule.class.php
@@ -0,0 +1,111 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+/*
+ * PmWikiContentModule.class.php - Provides access PmWiki Modules
+ *
+ * Copyright (C) 2006 - Marco Diedrich (mdiedric@uos.de)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+/**
+*
+* This class contains methods to handle PmWiki learning modules 
+*
+* @author   Marco Diedrich <mdiedric@uos.de>
+* @access   public
+* @modulegroup  elearning_interface_modules
+* @module       PmWikiContentModule
+* @package  ELearning-Interface
+*/
+
+class PmWikiContentModule extends ContentModule
+{
+
+    /**
+    * constructor
+    *
+    * init class. 
+    * @access public
+    * @param string $module_id module-id
+    * @param string $module_type module-type
+    * @param string $cms_type system-type
+    */ 
+
+    function __construct($module_id = "", $module_type, $cms_type)
+    {
+        parent::__construct($module_id, $module_type, $cms_type);
+        $this->link = $GLOBALS['connected_cms'][$this->cms_type]->ABSOLUTE_PATH_ELEARNINGMODULES.$this->id."/";
+        $this->client = WebserviceClient::instance( $this->link. '?' . 
+                                                    $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['URL_PARAMS'], 
+                                                    $GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['WEBSERVICE_CLASS']);
+    }
+
+    /**
+    * reads data for content module
+    *
+    */
+
+    function readData()
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        $args = [$GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['soap_data']['api-key'], $this->id];
+
+        $field_data = $connected_cms[$this->cms_type]->client->call('get_field_info', $args);
+
+        $this->title = $field_data['field_title'];
+        $this->authors = $field_data['field_author'];
+        $this->chdate = $field_data['change_date'];
+
+        $this->accepted_users = $field_data['field_accepted_users'];
+
+        return false;
+    }
+
+    /**
+    * get permission-status
+    *
+    * returns true, if operation is allowed
+    * @access public
+    * @param string $operation operation
+    * @return boolean allowed
+    */
+
+    function isAllowed($operation)
+    {
+        global $connected_cms, $view, $search_key, $cms_select, $current_module;
+
+        if (Config::get()->STUDIP_INSTALLATION_ID)
+        {
+            $username = Config::get()->STUDIP_INSTALLATION_ID."#".$GLOBALS['auth']->auth['uname'];
+        } else
+        {
+            $username = $GLOBALS['auth']->auth['uname'];
+        }
+
+        $args = [$GLOBALS['ELEARNING_INTERFACE_MODULES'][$this->cms_type]['soap_data']['api-key'],$this->id, $username];
+
+        $authorized = $connected_cms[$this->cms_type]->client->call('field_accessable_by_user', $args);
+
+        if ($authorized)
+        {
+            return true;
+        } else 
+        {
+            # old authorization
+            if (is_array($this->accepted_users) && in_array($username, $this->accepted_users))
+                return true;
+            else
+                return false;
+        }
+
+    }
+}
diff --git a/lib/elearning/clients/soap_webservice_client.php b/lib/elearning/clients/soap_webservice_client.php
new file mode 100644
index 0000000..9573f13
--- /dev/null
+++ b/lib/elearning/clients/soap_webservice_client.php
@@ -0,0 +1,23 @@
+<?php 
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+require_once 'webservice_client.php';
+require_once 'vendor/nusoap/nusoap.php';
+
+class Soap_WebserviceClient extends WebserviceClient
+{
+    public function __construct($webservice_url)
+    {
+        $this->client = new soap_client($webservice_url);
+        $this->client->response_timeout = 7600;
+    }
+
+    public function &call($method_name, &$args)
+    {
+        return $this->client->call($method_name, $args);
+    }
+}
+
diff --git a/lib/elearning/clients/webservice_client.php b/lib/elearning/clients/webservice_client.php
new file mode 100644
index 0000000..eea74a0
--- /dev/null
+++ b/lib/elearning/clients/webservice_client.php
@@ -0,0 +1,29 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+class WebserviceClient
+{
+    public static function instance($webservice_url, $classname)
+    {
+        static $instances = [];
+
+        if (!$instances[$classname . $webservice_url]) {
+            $instances[$classname . $webservice_url] = new $classname($webservice_url);
+        }
+
+        return $instances[$classname . $webservice_url];
+    }
+
+    public function __construct()
+    {
+        trigger_error("this class can't be instantiated");
+    }
+
+    public function &call($method_name, &$args)
+    {
+        trigger_error("WebserviceCaller::WebserviceCaller::  call not defined");
+    }
+}
diff --git a/lib/elearning/clients/xml_rpc_webservice_client.php b/lib/elearning/clients/xml_rpc_webservice_client.php
new file mode 100644
index 0000000..6060a0e
--- /dev/null
+++ b/lib/elearning/clients/xml_rpc_webservice_client.php
@@ -0,0 +1,33 @@
+<?php
+# Lifter002: TODO
+# Lifter007: TODO
+# Lifter003: TODO
+# Lifter010: TODO
+
+require_once __DIR__ . '/webservice_client.php';
+
+class XML_RPC_WebserviceClient extends WebserviceClient
+{
+    public function __construct($webservice_url)
+    {
+        $this->client = new xmlrpc_client($webservice_url);
+        #$this->client->verifyhost = true;
+        $this->client->debug = false;
+        $this->client->verifypeer = false;
+        $this->client->response_timeout = 7600;
+        $this->client->return_type = 'phpvals';
+
+    }
+
+    public function &call($method_name, &$args)
+    {
+        $xmlrpc_args = [];
+        foreach ($args as $arg)
+        {
+                $xmlrpc_args[] = php_xmlrpc_encode($arg);
+        }
+
+        $xmlrpc_return = $this->client->send(new xmlrpcmsg($method_name, $xmlrpc_args), 300);
+        return $xmlrpc_return->value();
+    }
+}
diff --git a/lib/elearning/studip_referrer.php b/lib/elearning/studip_referrer.php
new file mode 100644
index 0000000..7a0257c
--- /dev/null
+++ b/lib/elearning/studip_referrer.php
@@ -0,0 +1,124 @@
+<?php
+/* Copyright (c) 1998-2014 ILIAS open source, Extended GPL, see docs/LICENSE */
+
+/**
+* redirect script for studip-users
+*
+* @author Arne Schroeder <schroeder@data-quest.de>
+* @author Andre Noack <noack@data-quest.de>
+*
+*/
+
+/* ILIAS Version 4.4.x */
+
+if(file_exists("./ilias.ini.php")){
+    require_once("./Services/Init/classes/class.ilIniFile.php");
+    $ilIliasIniFile = new ilIniFile("./ilias.ini.php");
+    $ilIliasIniFile->read();
+    $serverSettings = $ilIliasIniFile->readGroup("server");
+    if ($serverSettings["studip"] != 1)
+    {
+        echo 'Option "studip" in ilias.ini.php is not enabled. You need to add studip = "1" to the server section.';
+        exit();
+    }
+
+    $cookie_path = dirname($_SERVER['PHP_SELF']);
+    if (mb_substr($cookie_path,-1) != "/") {
+        $cookie_path .= "/";
+    }
+    if (isset($_GET['sess_id']))
+    {
+        setcookie('PHPSESSID',$_GET['sess_id'],0, $cookie_path);
+        $_COOKIE['PHPSESSID'] = $_GET['sess_id'];
+    }
+
+    if (isset($_GET['client_id']))
+    {
+        setcookie('ilClientId',$_GET['client_id'],0, $cookie_path);
+        $_COOKIE['ilClientId'] = $_GET['client_id'];
+    }
+
+    require_once "./include/inc.header.php";
+
+    $base_url= "ilias.php?baseClass=ilPersonalDesktopGUI";
+
+
+    // redirect to specified page
+    $redirect = false;
+    switch($_GET['target'])
+    {
+    case 'start':
+        switch($_GET['type'])
+        {
+        case 'lm':
+            $base_url= "ilias.php?baseClass=ilLMPresentationGUI";
+            break;
+        case 'tst':
+            $base_url= "ilias.php?cmd=infoScreen&cmdClass=ilobjtestgui&baseClass=ilRepositoryGUI";
+            break;
+        case 'svy':
+            $base_url= "ilias.php?cmd=infoScreen&cmdClass=ilObjSurveyGUI&baseClass=ilRepositoryGUI";
+            break;
+        case 'exc':
+            $base_url= "ilias.php?cmd=infoScreen&cmdClass=ilExerciseHandlerGUI&baseClass=ilRepositoryGUI";
+            break;
+        case 'sahs':
+            $base_url = "ilias.php?baseClass=ilSAHSPresentationGUI";
+            break;
+        case 'htlm':
+            $base_url = "ilias.php?baseClass=ilHTLMPresentationGUI";
+            break;
+        case 'glo':
+            $base_url = "ilias.php?baseClass=ilGlossaryPresentationGUI";
+            break;
+        case 'cat':
+        case 'crs':
+            $base_url= "ilias.php?cmd=render&cmdClass=ilrepositorygui&baseClass=ilRepositoryGUI";
+            break;
+        case 'webr':
+            $base_url= "ilias.php?cmd=calldirectlink&baseClass=ilLinkResourceHandlerGUI";
+            break;
+        }
+        break;
+    case 'new':
+        $base_url = "ilias.php?baseClass=ilRepositoryGUI&cmd=create&new_type=".preg_replace('/[^a-z]/', '', $_GET['type']);
+        break;
+    case 'edit':
+        switch($_GET['type'])
+        {
+        case 'lm':
+            $base_url = "ilias.php?baseClass=ilLMEditorGUI";
+            break;
+        case 'tst':
+            $base_url = "ilias.php?baseClass=ilObjTestGUI";
+            break;
+        case 'sahs':
+            $base_url = "ilias.php?baseClass=ilSAHSEditGUI";
+            break;
+        case 'htlm':
+            $base_url = "ilias.php?baseClass=ilHTLMEditorGUI";
+            break;
+        case 'glo':
+            $base_url = "ilias.php?baseClass=ilGlossaryEditorGUI";
+            break;
+        case 'svy':
+            $base_url = "ilias.php?baseClass=ilObjSurveyGUI";
+            break;
+        case 'exc':
+            $base_url = "ilias.php?baseClass=ilExerciseHandlerGUI";
+            break;
+        case 'webr':
+            $base_url = "ilias.php?baseClass=ilLinkResourceHandlerGUI";
+            break;
+        }
+        break;
+    }
+    if ($base_url)
+    {
+        $base_url .= "&ref_id=".(int)$_GET['ref_id'];
+        $base_url = html_entity_decode($ilCtrl->appendRequestTokenParameterString($base_url));
+        header("Location: " . $base_url);
+        exit();
+    }
+}
+?>
\ No newline at end of file