make class ContentModule and method readData abstract (and fix constructor...

Closes #1252

Merge request studip/studip!767

1 files changed, 7 insertions, 2 deletions

diff --git a/lib/elearning/ContentModule.class.php b/lib/elearning/ContentModule.class.php
index 64ce29b..1b2921b 100644
--- a/lib/elearning/ContentModule.class.php
+++ b/lib/elearning/ContentModule.class.php
@@ -15,8 +15,13 @@
 * @module       ContentModule
 * @package  ELearning-Interface
 */
-class ContentModule
+abstract class ContentModule
 {
+    /**
+     * Fetches data from conencted cms.
+     */
+    abstract function readData();
+
     var $id;
     var $title;
     var $module_type;
@@ -41,7 +46,7 @@ class ContentModule
     * @param string $module_type module-type
     * @param string $cms_type system-type
     */
-    function __construct($module_id = "", $module_type, $cms_type)
+    function __construct($module_id, $module_type, $cms_type)
     {
         global $connected_cms;