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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Book print lib
 *
 * @package    booktool_print
 * @copyright  2011 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die;

require_once(__DIR__.'/lib.php');
require_once($CFG->dirroot.'/mod/book/locallib.php');

/**
 * Generate toc structure and titles
 *
 * @deprecated since Moodle 3.7
 * @param array $chapters
 * @param stdClass $book
 * @param stdClass $cm
 * @return array
 */
function booktool_print_get_toc($chapters, $book, $cm) {
    debugging('booktool_print_get_toc() is deprecated. Please use booktool_print renderer
            function render_print_book_toc().', DEBUG_DEVELOPER);

$first = true;
    $titles = array();

$context = context_module::instance($cm->id);

$toc = ''; // Representation of toc (HTML).

switch ($book->numbering) {
        case BOOK_NUM_NONE:
            $toc .= html_writer::start_tag('div', array('class' => 'book_toc_none'));
            break;
        case BOOK_NUM_NUMBERS:
            $toc .= html_writer::start_tag('div', array('class' => 'book_toc_numbered'));
            break;
        case BOOK_NUM_BULLETS:
            $toc .= html_writer::start_tag('div', array('class' => 'book_toc_bullets'));
            break;
        case BOOK_NUM_INDENTED:
            $toc .= html_writer::start_tag('div', array('class' => 'book_toc_indented'));
            break;
    }

$toc .= html_writer::tag('a', '', array('name' => 'toc')); // Representation of toc (HTML).

$toc .= html_writer::tag('h2', get_string('toc', 'mod_book'));
    $toc .= html_writer::start_tag('ul');
    foreach ($chapters as $ch) {
        if (!$ch->hidden) {
            $title = book_get_chapter_title($ch->id, $chapters, $book, $context);
            if (!$ch->subchapter) {

if ($first) {
                    $toc .= html_writer::start_tag('li');
                } else {
                    $toc .= html_writer::end_tag('ul');
                    $toc .= html_writer::end_tag('li');
                    $toc .= html_writer::start_tag('li');
                }

} else {

if ($first) {
                    $toc .= html_writer::start_tag('li');
                    $toc .= html_writer::start_tag('ul');
                    $toc .= html_writer::start_tag('li');
                } else {
                    $toc .= html_writer::start_tag('li');
                }

}
            $titles[$ch->id] = $title;
            $toc .= html_writer::link(new moodle_url('#ch'.$ch->id), $title, array('title' => s($title)));
            if (!$ch->subchapter) {
                $toc .= html_writer::start_tag('ul');
            } else {
                $toc .= html_writer::end_tag('li');
            }
            $first = false;
        }
    }

$toc .= html_writer::end_tag('ul');
    $toc .= html_writer::end_tag('li');
    $toc .= html_writer::end_tag('ul');
    $toc .= html_writer::end_tag('div');

$toc = str_replace('<ul></ul>', '', $toc); // Cleanup of invalid structures.

return array($toc, $titles);
}