<?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/>.

/**
 * Page to handle actions associated with badges management.
 *
 * @package    core
 * @subpackage badges
 * @copyright  2012 onwards Corplms Learning Solutions Ltd {@link http://www.corplmslms.com/}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Yuliya Bozhko <yuliya.bozhko@corplmslms.com>
 */

require_once(dirname(dirname(__FILE__)) . '/config.php');
require_once($CFG->libdir . '/badgeslib.php');

$badgeid = required_param('id', PARAM_INT);
$copy = optional_param('copy', 0, PARAM_BOOL);
$activate = optional_param('activate', 0, PARAM_BOOL);
$deactivate = optional_param('lock', 0, PARAM_BOOL);
$confirm   = optional_param('confirm', 0, PARAM_BOOL);
$return = optional_param('return', 0, PARAM_LOCALURL);

require_login();

$badge = new badge($badgeid);
$context = $badge->get_context();
$navurl = new moodle_url('/badges/index.php', array('type' => $badge->type));

if ($badge->type == BADGE_TYPE_COURSE) {
    require_login($badge->courseid);
    $navurl = new moodle_url('/badges/index.php', array('type' => $badge->type, 'id' => $badge->courseid));
    $PAGE->set_pagelayout('standard');
    navigation_node::override_active_url($navurl);
} else {
    $PAGE->set_pagelayout('admin');
    navigation_node::override_active_url($navurl, true);
}

$PAGE->set_context($context);
$PAGE->set_url('/badges/action.php', array('id' => $badge->id));

if ($return !== 0) {
    $returnurl = new moodle_url($return);
} else {
    $returnurl = new moodle_url('/badges/overview.php', array('id' => $badge->id));
}
$returnurl->remove_params('awards');

if ($copy) {
    require_sesskey();
    require_capability('moodle/badges:createbadge', $context);

    $cloneid = $badge->make_clone();
    // If a user can edit badge details, they will be redirected to the edit page.
    if (has_capability('moodle/badges:configuredetails', $context)) {
        redirect(new moodle_url('/badges/edit.php', array('id' => $cloneid, 'action' => 'details')));
    }
    redirect(new moodle_url('/badges/overview.php', array('id' => $cloneid)));
}

if ($activate) {
    require_capability('moodle/badges:configurecriteria', $context);

    $PAGE->url->param('activate', 1);
    $status = ($badge->status == BADGE_STATUS_INACTIVE) ? BADGE_STATUS_ACTIVE : BADGE_STATUS_ACTIVE_LOCKED;
    if ($confirm == 1) {
        require_sesskey();
        list($valid, $message) = $badge->validate_criteria();
        if ($valid) {
            $badge->set_status($status);

            if ($badge->type == BADGE_TYPE_SITE) {
                // Review on cron if there are more than 1000 users who can earn a site-level badge.
                $sql = 'SELECT COUNT(u.id) as num
                            FROM {user} u
                            LEFT JOIN {badge_issued} bi
                                ON u.id = bi.userid AND bi.badgeid = :badgeid
                            WHERE bi.badgeid IS NULL AND u.id != :guestid AND u.deleted = 0';
                $toearn = $DB->get_record_sql($sql, array('badgeid' => $badge->id, 'guestid' => $CFG->siteguest));

                if ($toearn->num < 1000) {
                    $awards = $badge->review_all_criteria();
                    $returnurl->param('awards', $awards);
                } else {
                    $returnurl->param('awards', 'cron');
                }
            } else {
                $awards = $badge->review_all_criteria();
                $returnurl->param('awards', $awards);
             }
            redirect($returnurl);
        } else {
            echo $OUTPUT->header();
            echo $OUTPUT->notification(get_string('error:cannotact', 'badges', $badge->name) . $message);
            echo $OUTPUT->continue_button($returnurl);
            echo $OUTPUT->footer();
            die();
        }
    }

    $strheading = get_string('reviewbadge', 'badges');
    $PAGE->navbar->add($strheading);
    $PAGE->set_title($strheading);
    $PAGE->set_heading($badge->name);
    echo $OUTPUT->header();
    echo $OUTPUT->heading($strheading);

    $params = array('id' => $badge->id, 'activate' => 1, 'sesskey' => sesskey(), 'confirm' => 1, 'return' => $return);
    $url = new moodle_url('/badges/action.php', $params);

    if (!$badge->has_criteria()) {
        echo $OUTPUT->notification(get_string('error:cannotact', 'badges', $badge->name) . get_string('nocriteria', 'badges'));
        echo $OUTPUT->continue_button($returnurl);
    } else {
        $message = get_string('reviewconfirm', 'badges', $badge->name);
        echo $OUTPUT->confirm($message, $url, $returnurl);
    }
    echo $OUTPUT->footer();
    die;
}

if ($deactivate) {
    require_sesskey();
    require_capability('moodle/badges:configurecriteria', $context);

    $status = ($badge->status == BADGE_STATUS_ACTIVE) ? BADGE_STATUS_INACTIVE : BADGE_STATUS_INACTIVE_LOCKED;
    $badge->set_status($status);
    redirect($returnurl);
}
