mod/lesson/action/addcluster.php

   1 <?php // $Id$
   2 /**
   3  * Action for adding a cluster page
   4  *
   5  * @version $Id$
   6  * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
   7  * @package lesson
   8  **/
   9     confirm_sesskey();
  10
  11     // first get the preceeding page
  12     // if $pageid = 0, then we are inserting a new page at the beginning of the lesson
  13     $pageid = required_param('pageid', PARAM_INT);
  14
  15     $timenow = time();
  16
  17     if ($pageid == 0) {
  18         if (!$page = get_record("lesson_pages", "prevpageid", 0, "lessonid", $lesson->id)) {
  19             error("Error: Add cluster: page record not found");
  20         }
  21     } else {
  22         if (!$page = get_record("lesson_pages", "id", $pageid)) {
  23             error("Error: Add cluster: page record not found");
  24         }
  25     }
  26     $newpage = new stdClass;
  27     $newpage->lessonid = $lesson->id;
  28     $newpage->prevpageid = $pageid;
  29     if ($pageid != 0) {
  30         $newpage->nextpageid = $page->nextpageid;
  31     } else {
  32         $newpage->nextpageid = $page->id;
  33     }
  34     $newpage->qtype = LESSON_CLUSTER;
  35     $newpage->timecreated = $timenow;
  36     $newpage->title = get_string("clustertitle", "lesson");
  37     $newpage->contents = get_string("clustertitle", "lesson");
  38     if (!$newpageid = insert_record("lesson_pages", $newpage)) {
  39         error("Insert page: new page not inserted");
  40     }
  41     // update the linked list...
  42     if ($pageid != 0) {
  43         if (!set_field("lesson_pages", "nextpageid", $newpageid, "id", $pageid)) {
  44             error("Add cluster: unable to update link");
  45         }
  46     }
  47
  48     if ($pageid == 0) {
  49         $page->nextpageid = $page->id;
  50     }
  51     if ($page->nextpageid) {
  52         // the new page is not the last page
  53         if (!set_field("lesson_pages", "prevpageid", $newpageid, "id", $page->nextpageid)) {
  54             error("Insert page: unable to update previous link");
  55         }
  56     }
  57     // ..and the single "answer"
  58     $newanswer = new stdClass;
  59     $newanswer->lessonid = $lesson->id;
  60     $newanswer->pageid = $newpageid;
  61     $newanswer->timecreated = $timenow;
  62     $newanswer->jumpto = LESSON_CLUSTERJUMP;
  63     if(!$newanswerid = insert_record("lesson_answers", $newanswer)) {
  64         error("Add cluster: answer record not inserted");
  65     }
  66     lesson_set_message(get_string('addedcluster', 'lesson'), 'notifysuccess');
  67     redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");
  68 ?>