current code from svn, revision 62608

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diff --git a/lib/classes/AutoInsert.class.php b/lib/classes/AutoInsert.class.php
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+<?php
+/**
+ * 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.
+ *
+ * @author      Nico Müller <nico.mueller@uni-oldenburg.de>
+ * @author      Michael Riehemann <michael.riehemann@uni-oldenburg.de>
+ * @author      Jan Hendrik Willms <jan.hendrik.willms@uni-oldenburg.de>
+ * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
+ * @category    Stud.IP
+ * @since       2.1
+ */
+
+/**
+ * AutoInsert.class.php
+ * Provides functions required by StEP00216:
+ * - Assign seminars for automatic registration of certain user types
+ * - Maintenance of registration rules
+ *
+ * Example of use:
+ * @code
+ *
+ *   # show all auto insert seminars
+ *   $auto_sems = AutoInsert::getAllSeminars();
+ *
+ *   # Save a new auto insert seminar with the user status
+ *   AutoInsert::saveSeminar($sem_id, $rechte);
+ *
+ * @endcode
+ */
+class AutoInsert
+{
+    private static $instance = null;
+    protected static $seminar_cache = null;
+
+    private $settings = [];
+
+    public static function instance()
+    {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+        return self::$instance;
+    }
+
+    public function __construct()
+    {
+        $this->loadSettings();
+    }
+
+    private function loadSettings()
+    {
+        $query = "SELECT a.seminar_id, GROUP_CONCAT(a.status,IF(LENGTH(a.domain_id)=0,':keine',CONCAT(':',a.domain_id))) AS domain_status, s.Name, s.Schreibzugriff, s.start_time ";
+        $query .= "FROM auto_insert_sem a ";
+        $query .= "JOIN seminare AS s USING (Seminar_id) ";
+        $query .= "GROUP BY s.seminar_id ";
+        $query .= "ORDER BY s.Name";
+        $statement = DBManager::get()->query($query);
+        $results   = $statement->fetchAll(PDO::FETCH_ASSOC);
+        foreach ($results as $result) {
+            if ($result['Schreibzugriff'] < 3) {
+                $domains = explode(',', $result['domain_status']);
+
+                foreach ($domains as $domain) {
+                    $array                                       = explode(':', $domain);
+                    $key                                         = $array[1] . '.' . $array[0];
+                    $this->settings[$key][$result['seminar_id']] = ['Seminar_id'     => $result['seminar_id'],
+                                                                    'name'           => $result['Name'],
+                                                                    'Schreibzugriff' => $result['Schreibzugriff'],
+                                                                    'start_time'     => $result['start_time']];
+                }
+            }
+        }
+    }
+
+
+    private function getUserSeminars($user_id, $seminare)
+    {
+        $statement = DBManager::get()->prepare("SELECT Seminar_id,s.name,s.Schreibzugriff,s.start_time,su.status
+            FROM seminar_user su
+            INNER JOIN seminare s USING(Seminar_id)
+            WHERE user_id = ? AND Seminar_id IN(?)");
+        $statement->execute([$user_id, $seminare]);
+        return $statement->fetchAll(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Trägt den Benutzer in den Eingestellten veranstaltungen automatisch ein.
+     * @param type $user_id
+     * @param type $status Wenn Status nicht angegeben wird, wird der Status des Users aus user_id genommen
+     * @return array 'added' Namen der Seminare in die der User eingetragen wurde
+     *                     array 'removed' Namen der Seminare aus denen der User ausgetragen wurde
+     */
+    public function saveUser($user_id, $status = false)
+    {
+        $domains = [];
+        if (!$status) {
+            $status = $GLOBALS['perm']->get_perm($user_id);
+        }
+        foreach (UserDomain::getUserDomainsForUser($user_id) as $d) {
+            $domains [] = $d->id; //Domains des Users
+        }
+
+        if (count($domains) === 0) {
+            $domains [] = 'keine';
+        }
+        $settings     = [];
+        $all_seminare = [];
+        foreach ($domains as $domain) {
+
+            $key = $domain . '.' . $status;
+            if (is_array($this->settings[$key])) {
+                $id = key($this->settings[$key]);
+                foreach ($this->settings[$key] as $id => $value) {
+                    $settings[$id] = $value;
+                }
+            }
+            foreach ($this->settings as $key) {
+                foreach ($key as $id => $sem) {
+                    $all_seminare[$id] = $sem;
+                }
+            }
+        }
+
+        $seminare              = [];
+        $seminare_tutor_dozent = [];
+        foreach ($this->getUserSeminars($user_id, array_keys($all_seminare)) as $sem) {
+            $seminare[$sem['Seminar_id']] = $sem;
+            if (in_array($sem['status'], ['tutor', 'dozent'])) {
+                $seminare_tutor_dozent[$sem['Seminar_id']] = $sem;
+            }
+        }
+        $toAdd    = array_diff_key($settings, $seminare);
+        $toRemove = array_diff_key($all_seminare, $toAdd, $settings, $seminare_tutor_dozent);
+
+        $added   = [];
+        $removed = [];
+
+        foreach ($toAdd as $id => $seminar) {
+            if ($this->addUser($user_id, $seminar)) $added[] = $seminar['name'];
+        }
+        foreach ($toRemove as $id => $seminar) {
+            if ($this->removeUser($user_id, $seminar)) $removed[] = $seminar['name'];
+        }
+
+        return ['added' => $added, 'removed' => $removed];
+    }
+
+    private function addUser($user_id, $seminar)
+    {
+        $query = "INSERT IGNORE INTO seminar_user (Seminar_id, user_id, status, gruppe, mkdate) 
+            VALUES (?, ?, 'autor', ?, UNIX_TIMESTAMP())";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar['Seminar_id'], $user_id, select_group($seminar['start_time'])]);
+        $rows = $statement->rowCount();
+        if ($rows > 0) return true;
+
+        return false;
+    }
+
+    private function removeUser($user_id, $seminar)
+    {
+        $query = "DELETE FROM seminar_user " . "WHERE user_id = ? " . "AND Seminar_id = ? ";
+
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$user_id, $seminar['Seminar_id']]);
+        $rows = $statement->rowCount();
+
+        $query             = "DELETE FROM statusgruppe_user " . "WHERE user_id = ? " . "AND statusgruppe_id IN (SELECT statusgruppe_id FROM statusgruppen WHERE range_id = ?)";
+        $statusgruppe_stmt = DBManager::get()->prepare($query);
+        $statusgruppe_stmt->execute([$user_id, $seminar['Seminar_id']]);
+        $statusgruppe_rows = $statusgruppe_stmt->rowCount();
+        if ($rows > 0 || $statusgruppe_rows > 0) return true;
+
+        return false;
+    }
+
+    /**
+     *
+     * @param type $user_id
+     */
+    public function deleteUserSeminare($user_id)
+    {
+        $db = DBManager::get();
+        $db->exec("DELETE FROM seminar_user " . "WHERE user_id = " . $db->quote($user_id));
+    }
+
+    /**
+     * Tests if a seminar already has an autoinsert record
+     * @param  string $seminar_id Id of the seminar
+     * @return bool   Indicating whether the seminar already has an autoinsert record
+     */
+    public static function checkSeminar($seminar_id, $domain_id = false)
+    {
+        $cached = self::getSeminarCache();
+
+        if (!isset($cached[$seminar_id])) {
+            $query = "SELECT domain_id, 1
+                      FROM auto_insert_sem
+                      WHERE seminar_id = ?";
+            $cached[$seminar_id] = DBManager::get()->fetchGroupedPairs(
+                $query,
+                [$seminar_id],
+                function ($value) {
+                    return (bool) $value;
+                }
+            );
+        }
+
+        return array_key_exists($domain_id ?: '', $cached[$seminar_id])
+             ? $cached[$seminar_id][$domain_id ?: '']
+             : false;
+    }
+
+    /**
+     * Enables a seminar for autoinsertion of users with the given status(ses)
+     * @param string $seminar_id Id of the seminar
+     * @param mixed $status      Either a single string or an array of strings
+     *                           containing the status(ses) to enable for
+     *                           autoinsertion
+     */
+    public static function saveSeminar($seminar_id, $status, $domain_id)
+    {
+        $query     = "INSERT INTO auto_insert_sem (seminar_id, status,domain_id) VALUES (?, ?,?)";
+        $statement = DBManager::get()->prepare($query);
+
+        foreach ((array)$status as $s) {
+            $statement->execute([$seminar_id, $s, $domain_id]);
+        }
+    }
+
+    /**
+     * Updates an autoinsert record for a given seminar, dependent on the
+     * parameter $remove it either inserts or removes the record for the given
+     * parameters
+     *
+     * @param string $seminar_id Id of the seminar
+     * @param string $status     Status for autoinsertion
+     * @param bool $remove       Whether the record should be added or removed
+     */
+    public static function updateSeminar($seminar_id, $domain = '', $status, $remove = false)
+    {
+        $query     = $remove ? "DELETE FROM auto_insert_sem WHERE seminar_id = ? AND status= ? AND domain_id = ?" : "INSERT IGNORE INTO auto_insert_sem (seminar_id, status,domain_id) VALUES (?, ?, ?)";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar_id, $status, $domain]);
+
+        if ($remove) {
+            unset(self::getSeminarCache()[$seminar_id]);
+        }
+    }
+
+    /**
+     * Removes a seminar from the autoinsertion process.
+     * @param string $seminar_id Id of the seminar
+     */
+    public static function deleteSeminar($seminar_id)
+    {
+        $query     = "DELETE FROM auto_insert_sem WHERE seminar_id = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar_id]);
+
+        unset(self::getSeminarCache()[$seminar_id]);
+    }
+
+    /**
+     * Returns a list of all seminars enabled for autoinsertion
+     * @param  bool  Indicates whether only the seminar ids (true) or the full
+     *               dataset shall be returned (false)
+     * @return array The list of all enabled seminars (format according to $only_sem_id)
+     */
+    public static function getAllSeminars($only_sem_id = false)
+    {
+        if ($only_sem_id) {
+            $query     = "SELECT DISTINCT seminar_id FROM auto_insert_sem";
+            $statement = DBManager::get()->query($query);
+            $results   = $statement->fetchAll(PDO::FETCH_COLUMN);
+        } else {
+            $query = "SELECT a.seminar_id, GROUP_CONCAT(a.status,IF(LENGTH(a.domain_id)=0,':keine',CONCAT(':',a.domain_id))) AS domain_status, s.Name, s.Schreibzugriff, s.start_time ";
+            $query .= "FROM auto_insert_sem a ";
+            $query .= "JOIN seminare AS s USING (Seminar_id) ";
+
+            $query .= "GROUP BY s.seminar_id ";
+            $query .= "ORDER BY s.Name";
+            $statement = DBManager::get()->query($query);
+            $results   = $statement->fetchAll(PDO::FETCH_ASSOC);
+            foreach ($results as $index => $result) {
+                $domains = explode(',', $result['domain_status']);
+                foreach ($domains as $domain) {
+                    $array                                  = explode(':', $domain);
+                    $results[$index]['status'][$array[1]][] = $array[0];
+                }
+            }
+        }
+
+        return $results;
+    }
+
+    /**
+     * Returns a seminar's info for autoinsertion
+     * @param  string $seminar_id Id of the seminar
+     * @return array  The seminar's data as an associative array
+     */
+    public static function getSeminar($seminar_id)
+    {
+        $query = "SELECT a.seminar_id, GROUP_CONCAT(a.status) AS status, s.Name ";
+        $query .= "FROM auto_insert_sem a ";
+        $query .= "JOIN seminare AS s USING (Seminar_id) ";
+        $query .= "WHERE a.seminar_id = ? ";
+        $query .= "GROUP BY s.seminar_id";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar_id]);
+
+        $result           = $statement->fetch(PDO::FETCH_ASSOC);
+        $result['status'] = explode(',', $result['status']);
+        return $result;
+    }
+
+    /**
+     * Store the user's automatic registration in a seminar redundantly to
+     * avoid an annoying reregistration although the user explicitely left the
+     * according seminar
+     * @param string $user_id    Id of the user
+     * @param string $seminar_id Id of the seminar
+     */
+    public static function saveAutoInsertUser($seminar_id, $user_id)
+    {
+        $query     = "INSERT INTO auto_insert_user (Seminar_id, user_id, mkdate)
+                  SELECT ?, user_id, UNIX_TIMESTAMP() FROM auth_user_md5 WHERE
+                  user_id=? AND perms NOT IN('root','admin')";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar_id, $user_id]);
+        return $statement->rowCount();
+    }
+
+    /**
+     * Tests whether a user was already automatically registered for a certain
+     * seminar.
+     * @param  string $seminar_id Id of the seminar
+     * @param  string $user_id    If of the user
+     * @return bool   Indicates whether the user was already registered
+     */
+    public static function checkAutoInsertUser($seminar_id, $user_id)
+    {
+        $query     = "SELECT 1 FROM auto_insert_user WHERE seminar_id = ? AND user_id = ?";
+        $statement = DBManager::get()->prepare($query);
+        $statement->execute([$seminar_id, $user_id]);
+        $result = $statement->fetchColumn();
+
+        return $result > 0;
+    }
+
+    /**
+     * Returns the cache for seminars.
+     * @return StudipCachedArray
+     */
+    protected static function getSeminarCache()
+    {
+        if (self::$seminar_cache === null) {
+            self::$seminar_cache = new StudipCachedArray('/AutoInsertSeminars');
+        }
+        return self::$seminar_cache;
+    }
+}