mod/book/show.php

   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