1 files changed, 149 insertions, 0 deletions
diff --git a/lib/filesystem/ResourceFolder.php b/lib/filesystem/ResourceFolder.php
new file mode 100644
index 0000000..ce7b216
--- /dev/null
+++ b/lib/filesystem/ResourceFolder.php
@@ -0,0 +1,149 @@
+<?php
+
+
+/**
+ * This is a folder type for files associated with Resource objects.
+ * Its purpose is to allow users to link or add relevant files
+ * to a Resource.
+ * An an example, one could attach a fire escape plan to a Building resource.
+ */
+class ResourceFolder extends StandardFolder
+{
+    public static function getTypeName()
+    {
+        return _('Ressourcen-Dateiordner');
+    }
+
+    public static function availableInRange($range_id_or_object, $user_id)
+    {
+        //A resource folder is not available for course, user, institute
+        //or message objects. Only when a range_id of a resource is given
+        //or a resource object we may return true.
+
+        if ($range_id_or_object instanceof Resource) {
+            //$range_id_or_object contains a Resource object.
+            return true;
+        } else {
+            //$range_id_or_object contains an ID.
+            //If we find a resource object for that ID
+            //we can return true, otherwise we return false.
+            return Resource::exists($range_id_or_object);
+        }
+    }
+
+    public function getIcon($role = Icon::DEFAULT_ROLE)
+    {
+        return Icon::create('resource', $role);
+    }
+
+    public function isVisible($user_id)
+    {
+        if ($user_id == 'nobody') {
+            return false;
+        }
+        //Get the resource object:
+        $resource = Resource::find($this->range_id);
+        $user = User::find($user_id);
+
+        if (($resource instanceof Resource) && ($user instanceof User)) {
+            return true;
+        } elseif ($user instanceof User) {
+            //Check global permissions:
+            return ResourceManager::userHasGlobalPermission(
+                $user,
+                'admin'
+            );
+        }
+        return false;
+    }
+
+    public function isReadable($user_id)
+    {
+        if ($user_id == 'nobody') {
+            return false;
+        }
+        //Get the resource object:
+        $resource = Resource::find($this->range_id);
+        $user = User::find($user_id);
+
+        if (($resource instanceof Resource) && ($user instanceof User)) {
+            return true;
+        } elseif ($user instanceof User) {
+            //Check global permissions:
+            return ResourceManager::userHasGlobalPermission(
+                $user,
+                'admin'
+            );
+        }
+        return false;
+    }
+
+    public function isWritable($user_id)
+    {
+        $user = User::find($user_id);
+
+        //Check global permissions: The user has to be
+        //a global resource admin or a root user.
+        return ResourceManager::userHasGlobalPermission(
+            $user,
+            'admin'
+        );
+    }
+
+    public function isEditable($user_id)
+    {
+        //Thou shalt not edit ResourceFolder folder types!
+        return false;
+    }
+
+    public function isSubfolderAllowed($user_id)
+    {
+        //Furthermore, thou shalt not create subfolders in a Resource folder!
+        return false;
+    }
+
+    public function getSubfolder()
+    {
+        //No subfolders allowed, resulting in:
+        return [];
+    }
+
+    public function getEditTemplate()
+    {
+        return '';
+    }
+
+    public function setDataFromEditTemplate($folderdata)
+    {
+        return MessageBox::error(
+            _('Ressourcenordner dürfen nicht geändert werden!')
+        );
+    }
+
+    public function createSubfolder(FolderType $foldertype)
+    {
+        //No subfolders allowed, resulting in:
+        return null;
+    }
+
+    public function deleteSubfolder($subfolder_id)
+    {
+        //No subfolders allowed, resulting in:
+        return false;
+    }
+
+    public function isFileDownloadable($file_ref_id, $user_id)
+    {
+        return $this->isReadable($user_id);
+    }
+
+    public function isFileEditable($file_ref_id, $user_id)
+    {
+        return $this->isWritable($user_id);
+    }
+
+    public function isFileWritable($file_ref_id, $user_id)
+    {
+        return $this->isWritable($user_id);
+    }
+}