<?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/>.


namespace theme_adaptable;

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

require_once($CFG->dirroot.'/calendar/lib.php');
require_once($CFG->libdir.'/completionlib.php');
require_once($CFG->dirroot.'/grade/lib.php');
require_once($CFG->dirroot.'/grade/report/overview/lib.php');
require_once($CFG->dirroot.'/mod/forum/lib.php');
require_once($CFG->dirroot.'/lib/enrollib.php');

if ($CFG->version < 2018051799) {
    require_once($CFG->libdir.'/coursecatlib.php');
}

/**
 * General utility functions.
 *
 * @package   theme_adaptable
 * @copyright 2017 Manoj Solanki (Coventry University)
 * @copyright Copyright (c) 2016 Moodlerooms Inc. (http://www.moodlerooms.com)
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class utils {

    /**
     * Get total participant count for specific courseid. Originally from
     * the snap theme by Moodlerooms.
     *
     * @param $courseid
     * @param $modname the name of the module, used to build a capability check
     * @return int
     */
    public static function course_participant_count($courseid, $modname = null) {
        static $participantcount = array();

        // Incorporate the modname in the static cache index.
        $idx = $courseid . $modname;

        if (!isset($participantcount[$idx])) {
            // Use the modname to determine the best capability.
            switch ($modname) {
                case 'assign':
                    $capability = 'mod/assign:submit';
                    break;
                case 'quiz':
                    $capability = 'mod/quiz:attempt';
                    break;
                case 'choice':
                    $capability = 'mod/choice:choose';
                    break;
                case 'feedback':
                    $capability = 'mod/feedback:complete';
                    break;
                default:
                    // If no modname is specified, assume a count of all users is required.
                    $capability = '';
            }

            $context = \context_course::instance($courseid);
            $onlyactive = true;
            $enrolled = count_enrolled_users($context, $capability, null, $onlyactive);
            $participantcount[$idx] = $enrolled;
        }

        return $participantcount[$idx];
    }



}