[Summary view]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Show/hide book chapter
  19   *
  20   * @package    mod_book
  21   * @copyright  2004-2010 Petr Skoda {@link http://skodak.org}
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  require(__DIR__.'/../../config.php');
  26  require_once (__DIR__.'/locallib.php');
  27  
  28  $id        = required_param('id', PARAM_INT);        // Course Module ID
  29  $chapterid = required_param('chapterid', PARAM_INT); // Chapter ID
  30  
  31  $cm = get_coursemodule_from_id('book', $id, 0, false, MUST_EXIST);
  32  $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  33  $book = $DB->get_record('book', array('id'=>$cm->instance), '*', MUST_EXIST);
  34  
  35  require_login($course, false, $cm);
  36  require_sesskey();
  37  
  38  $context = context_module::instance($cm->id);
  39  require_capability('mod/book:edit', $context);
  40  
  41  $PAGE->set_url('/mod/book/show.php', array('id'=>$id, 'chapterid'=>$chapterid));
  42  
  43  $chapter = $DB->get_record('book_chapters', array('id'=>$chapterid, 'bookid'=>$book->id), '*', MUST_EXIST);
  44  
  45  // Switch hidden state.
  46  $chapter->hidden = $chapter->hidden ? 0 : 1;
  47  
  48  // Update record.
  49  $DB->update_record('book_chapters', $chapter);
  50  \mod_book\event\chapter_updated::create_from_chapter($book, $context, $chapter)->trigger();
  51  
  52  // Change visibility of subchapters too.
  53  if (!$chapter->subchapter) {
  54      $chapters = $DB->get_recordset('book_chapters', array('bookid'=>$book->id), 'pagenum ASC');
  55      $found = 0;
  56      foreach ($chapters as $ch) {
  57          if ($ch->id == $chapter->id) {
  58              $found = 1;
  59  
  60          } else if ($found and $ch->subchapter) {
  61              $ch->hidden = $chapter->hidden;
  62              $DB->update_record('book_chapters', $ch);
  63              \mod_book\event\chapter_updated::create_from_chapter($book, $context, $ch)->trigger();
  64  
  65          } else if ($found) {
  66              break;
  67          }
  68      }
  69      $chapters->close();
  70  }
  71  
  72  book_preload_chapters($book); // fix structure
  73  $DB->set_field('book', 'revision', $book->revision+1, array('id'=>$book->id));
  74  
  75  redirect('view.php?id='.$cm->id.'&chapterid='.$chapter->id);
  76