<?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/>.

/**
 * This file to proccess Oauth2 connects for backpack.
 *
 * @package    core_badges
 * @subpackage badges
 * @copyright  2020 Tung Thai
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Tung Thai <Tung.ThaiDuc@nashtechglobal.com>
 */

namespace core_badges\oauth2;

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

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

use stdClass;

/**
 * Proccess Oauth2 connects to backpack site.
 *
 * @copyright  2020 Tung Thai
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Tung Thai <Tung.ThaiDuc@nashtechglobal.com>
 */
class auth extends \auth_oauth2\auth {

    /**
     * To complete data after login.
     *
     * @param client $client object.
     * @param string $redirecturl the url redirect.
     */
    public function complete_data(\core_badges\oauth2\client $client, $redirecturl) {
        global $DB, $USER;

        $userinfo = $client->get_userinfo();
        $badgebackpack = new stdClass();
        $badgebackpack->userid = $USER->id;
        if ($userinfo && isset($userinfo->email)) {
            $badgebackpack->email = $userinfo->email;
        } else {
            $badgebackpack->email = $USER->email;
        }
        $badgebackpack->externalbackpackid = $client->backpack->id;
        $badgebackpack->backpackuid = 0;
        $badgebackpack->autosync = 0;
        $badgebackpack->password = '';
        $record = $DB->get_record('badge_backpack', ['userid' => $USER->id,
            'externalbackpackid' => $client->backpack->id]);
        if (!$record) {
            $DB->insert_record('badge_backpack', $badgebackpack);
        } else {
            $badgebackpack->id = $record->id;
            $DB->update_record('badge_backpack', $badgebackpack);
        }

        redirect($redirecturl, get_string('backpackconnected', 'badges'), null,
            \core\output\notification::NOTIFY_SUCCESS);
    }

    /**
     * Check user has been logged the backpack site.
     *
     * @param int $externalbackpackid ID of external backpack.
     * @param int $userid ID of user.
     * @return bool
     */
    public static function is_logged_oauth2($externalbackpackid, $userid) {
        global $USER;
        if (empty($userid)) {
            $userid = $USER->id;
        }
        $persistedtoken = badge_backpack_oauth2::get_record(['externalbackpackid' => $externalbackpackid, 'userid' => $userid]);
        if ($persistedtoken) {
            return true;
        }
        return false;
    }
}