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 25require(__DIR__.'/../../config.php'); 26require_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 35require_login($course, false, $cm); 36require_sesskey(); 37 38$context = context_module::instance($cm->id); 39require_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, $chapter)->trigger(); 51 52// Change visibility of subchapters too. 53if (!$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 $chapters->close(); 70} 71 72book_preload_chapters($book); // fix structure 73$DB->set_field('book', 'revision', $book->revision+1, array('id'=>$book->id)); 74 75redirect('view.php?id='.$cm->id.'&chapterid='.$chapter->id); 76 77