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✏️ Editing: can_join.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/>.

namespace mod_bigbluebuttonbn\external;

use core_external\external_api;
use core_external\external_function_parameters;
use core_external\external_single_structure;
use core_external\external_value;
use core_external\restricted_context_exception;
use mod_bigbluebuttonbn\instance;
use mod_bigbluebuttonbn\meeting;

/**
 * External service to check whether a user can join a meeting.
 *
 * This is mainly used by the mobile application.
 *
 * @package   mod_bigbluebuttonbn
 * @category  external
 * @copyright 2018 onwards, Blindside Networks Inc
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class can_join extends external_api {
    /**
     * Returns description of method parameters
     *
     * @return external_function_parameters
     */
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters([
            'cmid' => new external_value(PARAM_INT, 'course module id', VALUE_REQUIRED),
            'groupid' => new external_value(PARAM_INT, 'bigbluebuttonbn group id', VALUE_DEFAULT, 0),
        ]);
    }

/**
     * Updates a recording
     *
     * @param int $cmid the bigbluebuttonbn course module id
     * @param null|int $groupid
     * @return array (empty array for now)
     * @throws \restricted_context_exception
     */
    public static function execute(
        int $cmid,
        ?int $groupid = 0
    ): array {
        // Validate the cmid ID.
        [
            'cmid' => $cmid,
            'groupid' => $groupid,
        ] = self::validate_parameters(self::execute_parameters(), [
            'cmid' => $cmid,
            'groupid' => $groupid,
        ]);

$result = [
            'can_join' => false,
            'cmid' => $cmid,
        ];

$instance = instance::get_from_cmid($cmid);
        if (empty($instance)) {
            return $result;
        }
        // Validate the groupid.
        if (!groups_group_visible($groupid, $instance->get_course(), $instance->get_cm())) {
            throw new restricted_context_exception();
        }
        $instance->set_group_id($groupid);

self::validate_context($instance->get_context());

$meeting = new meeting($instance);

$result['can_join'] = $meeting->can_join();

return $result;
    }

/**
     * Describe the return structure of the external service.
     *
     * @return external_single_structure
     * @since Moodle 3.3
     */
    public static function execute_returns(): external_single_structure {
        return new external_single_structure([
            'can_join' => new external_value(PARAM_BOOL, 'Can join session'),
            'cmid' => new external_value(PARAM_INT, 'course module id', VALUE_REQUIRED),
        ]);
    }
}

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