format.php

<?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/>.

/**
 * Collapsed Topics Information
 *
 * A topic based format that solves the issue of the 'Scroll of Death' when a course has many topics. All topics
 * except zero have a toggle that displays that topic. One or more topics can be displayed at any given time.
 * Toggles are persistent on a per browser session per course basis but can be made to persist longer by a small
 * code change. Full installation instructions, code adaptions and credits are included in the 'Readme.txt' file.
 *
 * @package    format_topcoll
 * @copyright  &copy; 2009-onwards G J Barnard in respect to modifications of standard topics format.
 * @author     G J Barnard - {@link https://moodle.org/user/profile.php?id=442195}
 * @link       https://docs.moodle.org/en/Collapsed_Topics_course_format
 * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir . '/filelib.php');
require_once($CFG->libdir . '/completionlib.php');

// Horrible backwards compatible parameter aliasing....
if ($ctopic = optional_param('ctopics', 0, PARAM_INT)) { // Collapsed Topics old section parameter.
    $url = $PAGE->url;
    $url->param('section', $ctopic);
    debugging('Outdated collapsed topic param passed to course/view.php', DEBUG_DEVELOPER);
    redirect($url);
}
if ($topic = optional_param('topic', 0, PARAM_INT)) { // Topics and Grid old section parameter.
    $url = $PAGE->url;
    $url->param('section', $topic);
    debugging('Outdated topic / grid param passed to course/view.php', DEBUG_DEVELOPER);
    redirect($url);
}
if ($week = optional_param('week', 0, PARAM_INT)) { // Weeks old section parameter.
    $url = $PAGE->url;
    $url->param('section', $week);
    debugging('Outdated week param passed to course/view.php', DEBUG_DEVELOPER);
    redirect($url);
}
// End backwards-compatible aliasing....

$context = context_course::instance($course->id);

// Retrieve course format option fields and add them to the $course object.
$courseformat = course_get_format($course);
$course = $courseformat->get_course();
$courseformatoptions = $courseformat->get_settings();

if (($marker >= 0) && has_capability('moodle/course:setcurrentsection', $context) && confirm_sesskey()) {
    $course->marker = $marker;
    course_set_marker($course->id, $marker);
}

// Make sure all sections are created.
course_create_sections_if_missing($course, range(0, $courseformatoptions['numsections']));

$renderer = $PAGE->get_renderer('format_topcoll');

$content = '';
$contentcontext = [
    'title' => $courseformat->page_title(),
    'userisediting' => $PAGE->user_is_editing(),
];
if (!empty($displaysection)) {
    $courseformat->set_sectionnum($displaysection);
    $content = $renderer->single_section_page($displaysection);
    $contentcontext['sectionreturn'] = $displaysection;
} else {
    $content = $renderer->multiple_section_page();
}

$contentcontext['content'] = $content;

echo $renderer->render_from_template('format_topcoll/content', $contentcontext);