Minor - adding classes to the course information (code commented)

main/admin/course_information.php

@@ -126,18 +126,20 @@ if (Database::num_rows($res) > 0) {
 }
 
 $session_list = SessionManager::get_session_by_course($course->code);
-$url = api_get_path(WEB_CODE_PATH);
-foreach($session_list as &$session)  {    
-    $session[0] = Display::url($session[0], $url.'admin/resume_session.php?id_session='.$session['id'] );
-    unset($session[1]);
-}
 
+$url = api_get_path(WEB_CODE_PATH);
 if (!empty($session_list)) {
+    foreach($session_list as &$session)  {    
+        $session[0] = Display::url($session[0], $url.'admin/resume_session.php?id_session='.$session['id'] );
+        unset($session[1]);
+    }
     echo Display::page_header(get_lang('Sessions')); 
     $table = new SortableTableFromArray($session_list, 0, 20,'user_table');
     $table->display();
 }
 
+/*$group = new UserGroup();
+$usegroups = $group->get_usergroup_by_course($course->id);*/
 
 /*@todo This should be dissapear classes are a deprecated feature*/ 
 /*

main/inc/lib/usergroup.lib.php

@@ -34,7 +34,6 @@ class UserGroup extends Model {
         return $row['id'];
     }
 
-
     /**
      * Displays the title + grid
      */
@@ -67,6 +66,17 @@ class UserGroup extends Model {
         }
         return $array;
     }
+    
+    public function get_usergroup_by_course($course_id) {
+        $results = Database::select('usergroup_id', $this->usergroup_rel_course_table, array('where'=>array('course_id = ?'=> $course_id)));
+        $array = array();
+        if (!empty($results)) {
+            foreach($results as $row) {
+                $array[]= $row['usergroup_id'];
+            }
+        }
+        return $array;
+    }
 
     /**
      * Gets a list of session ids by user group