settings.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/>.

/**
 * Local plugin "resort courses" - Settings
 *
 * @package    local_resort_courses
 * @copyright  2013 Alexander Bias, Ulm University <alexander.bias@uni-ulm.de>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

if ($hassiteconfig) {
    // New settings page.
    $page = new admin_settingpage('resort_courses', get_string('pluginname', 'local_resort_courses', null, true));


    if ($ADMIN->fulltree) {
        // Require necessary libraries.
        require_once(__DIR__ . '/locallib.php');
        require_once($CFG->dirroot.'/course/lib.php');

        // Sort order.
        $page->add(new admin_setting_heading('local_resort_courses/sortorderheading',
                get_string('sortorder', 'local_resort_courses', null, true),
                ''));

        // Create sort order widget.
        $sortorders[RESORT_COURSES_SORT_FULLNAME_ASC] = get_string('sortfullnameasc', 'local_resort_courses', null, false);
                // Don't use string lazy loading here because the string will be directly used and
                // would produce a PHP warning otherwise.
        $sortorders[RESORT_COURSES_SORT_FULLNAME_DESC] = get_string('sortfullnamedesc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_SHORTNAME_ASC] = get_string('sortshortnameasc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_SHORTNAME_DESC] = get_string('sortshortnamedesc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_COURSEID_ASC] = get_string('sortcourseidasc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_COURSEID_DESC] = get_string('sortcourseiddesc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_STARTDATE_ASC] = get_string('sortstartdateasc', 'local_resort_courses', null, true);
        $sortorders[RESORT_COURSES_SORT_STARTDATE_DESC] = get_string('sortstartdatedesc', 'local_resort_courses', null, true);
        $page->add(new admin_setting_configselect('local_resort_courses/sortorder',
                get_string('sortorder', 'local_resort_courses', null, true),
                get_string('sortorder_desc', 'local_resort_courses', null, true),
                RESORT_COURSES_SORT_FULLNAME_ASC,
                $sortorders));


        // Skip categories.
        $page->add(new admin_setting_heading('local_resort_courses/skipcategoriesheading',
                get_string('skipcategories', 'local_resort_courses', null, true),
                ''));

        // Create skip categories widget.
        $categories = \core_course_category::make_categories_list();
        $page->add(new admin_setting_configmultiselect('local_resort_courses/skipcategories',
                get_string('skipcategories', 'local_resort_courses', null, true),
                get_string('skipcategories_desc', 'local_resort_courses', null, true),
                [],
                $categories));

        // Create skip categories recursively widget.
        $page->add(new admin_setting_configcheckbox('local_resort_courses/skipcategoriesrecursively',
                get_string('skipcategoriesrecursively', 'local_resort_courses', null, true),
                get_string('skipcategoriesrecursively_desc', 'local_resort_courses', null, true),
                0));
    }


    // Add settings page to navigation tree.
    $ADMIN->add('courses', $page);
}