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/**
* Show/hide book chapter
*
* @package mod_book
* @copyright 2004-2010 Petr Skoda {@link http://skodak.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require(__DIR__.'/../../config.php');
require_once(__DIR__.'/locallib.php');
$id = required_param('id', PARAM_INT); // Course Module ID
$chapterid = required_param('chapterid', PARAM_INT); // Chapter ID
$cm = get_coursemodule_from_id('book', $id, 0, false, MUST_EXIST);
$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
$book = $DB->get_record('book', array('id'=>$cm->instance), '*', MUST_EXIST);
require_login($course, false, $cm);
require_sesskey();
$context = context_module::instance($cm->id);
require_capability('mod/book:edit', $context);
$PAGE->set_url('/mod/book/show.php', array('id'=>$id, 'chapterid'=>$chapterid));
$chapter = $DB->get_record('book_chapters', array('id'=>$chapterid, 'bookid'=>$book->id), '*', MUST_EXIST);
// Switch hidden state.
$chapter->hidden = $chapter->hidden ? 0 : 1;
// Update record.
$DB->update_record('book_chapters', $chapter);
\mod_book\event\chapter_updated::create_from_chapter($book, $context, $chapter)->trigger();
// Change visibility of subchapters too.
if (!$chapter->subchapter) {
$chapters = $DB->get_recordset('book_chapters', array('bookid'=>$book->id), 'pagenum ASC');
$found = 0;
foreach ($chapters as $ch) {
if ($ch->id == $chapter->id) {
$found = 1;
} else if ($found and $ch->subchapter) {
$ch->hidden = $chapter->hidden;
$DB->update_record('book_chapters', $ch);
\mod_book\event\chapter_updated::create_from_chapter($book, $context, $ch)->trigger();
} else if ($found) {
break;
}
}
$chapters->close();
}
book_preload_chapters($book); // fix structure
$DB->set_field('book', 'revision', $book->revision+1, array('id'=>$book->id));
redirect('view.php?id='.$cm->id.'&chapterid='.$chapter->id);