include/lib/delete_course.inc.php

   1 <?php
   2 /************************************************************************/
   3 /* ATutor                                                                                                                               */
   4 /************************************************************************/
   5 /* Copyright (c) 2002-2008 by Greg Gay,Joel Kronenberg & Heidi Hazelton */
   6 /* Adaptive Technology Resource Centre / University of Toronto                  */
   7 /* http://atutor.ca                                                                                                             */
   8 /*                                                                                                                                              */
   9 /* This program is free software. You can redistribute it and/or                */
  10 /* modify it under the terms of the GNU General Public License                  */
  11 /* as published by the Free Software Foundation.                                                */
  12 /************************************************************************/
  13 // $Id$
  14
  15
  16 function delete_course($course, $material) {
  17         global $db, $moduleFactory;
  18
  19         $delete_groups = FALSE; // whether or not to delete the groups as well
  20
  21         $groups = array();
  22
  23         //unset s_cid var
  24         if ($material === TRUE) {
  25                 unset($_SESSION['s_cid']);
  26                 $delete_groups = TRUE;
  27                 // get a list of groups in an array to send to module::delete()
  28                 // get groups
  29                 $sql    = "SELECT G.group_id FROM ".TABLE_PREFIX."groups G INNER JOIN ".TABLE_PREFIX."groups_types T USING (type_id) WHERE T.course_id=$course";
  30                 $result = mysql_query($sql, $db);
  31                 while ($group_row = mysql_fetch_assoc($result)) {
  32                         $groups[] = $group_row['group_id'];
  33                 }
  34         }
  35
  36         $module_list = $moduleFactory->getModules(AT_MODULE_STATUS_ENABLED | AT_MODULE_STATUS_DISABLED);
  37         $keys = array_keys($module_list);
  38
  39         //loop through mods and call delete function
  40         foreach ($keys as $module_name) {
  41                 if ($module_name == '_core/groups') {
  42                         continue;
  43                 }
  44                 if ($module_name == '_core/enrolment') {
  45                         continue;
  46                 }
  47                 $module =& $module_list[$module_name];
  48
  49                 if (($material === TRUE) || isset($material[$module_name])) {
  50                         $module->delete($course, $groups);
  51                 }
  52         }
  53
  54         // groups and enrollment must be deleted last because that info is used by other modules
  55
  56         if (($material === TRUE) || isset($material['_core/groups'])) {
  57                 $module =& $moduleFactory->getModule('_core/groups');
  58                 $module->delete($course, $groups);
  59         }
  60         if (($material === TRUE) || isset($material['_core/enrolment'])) {
  61                 $module =& $moduleFactory->getModule('_core/enrolment');
  62                 $module->delete($course, $groups);
  63         }
  64
  65         if ($material === TRUE) {
  66                 // delete actual course
  67                 $sql = "DELETE FROM ".TABLE_PREFIX."courses WHERE course_id=$course";
  68                 $result = mysql_query($sql, $db);
  69         }
  70 }
  71 ?>