sesion.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/>.

/**
 * Prints a particular instance of jitsi
 *
 * You can have a rather longer description of the file as well,
 * if you like, and it can span multiple lines.
 *
 * @package    mod_jitsi
 * @copyright  2019 Sergio Comerón <sergiocomeron@icloud.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
require_once(dirname(dirname(dirname(__FILE__))).'/lib/moodlelib.php');
require_once(dirname(__FILE__).'/lib.php');
$PAGE->set_url($CFG->wwwroot.'/mod/jitsi/sesion.php');

$courseid = required_param('courseid', PARAM_INT);
$cmid = required_param('cmid', PARAM_INT);
$nombre = required_param('nom', PARAM_TEXT);
$sesion = required_param('ses', PARAM_TEXT);
$sesionnorm = str_replace(' ', '', $sesion);
$avatar = required_param('avatar', PARAM_TEXT);
$teacher = required_param('t', PARAM_TEXT);
require_login($courseid);

$PAGE->set_title($sesion);
$PAGE->set_heading($sesion);
echo $OUTPUT->header();

$context = context_module::instance($cmid);

if (!has_capability('mod/jitsi:view', $context)) {
    notice(get_string('noviewpermission', 'jitsi'));
}

$header = json_encode([
  "kid" => "jitsi/custom_key_name",
  "typ" => "JWT",
  "alg" => "HS256"        // Hash HMAC
],JSON_UNESCAPED_SLASHES);
$base64urlheader = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($header));

$payload  = json_encode([
  "context" =>[
	"user" => [
      "avatar" => $avatar,
      "name" => $nombre,
      "email" => "",
      "id" => "" // only for internal usage
    ],
    "group" => ""
],
  "aud" => "jitsi",
  "iss" => $CFG->jitsi_app_id,            // Required - as JWT_APP_ID env

  "sub" => $CFG->jitsi_domain,            // Requied: as DOMAIN env
  "room" => $sesionnorm,                  // restricted room name or * for all room

  "exp" => time()+24*3600,                // unix timestamp for expiration, for example 24 hours
  "moderator" => $teacher                // true/false for room moderator role

], JSON_UNESCAPED_SLASHES);
$base64urlpayload = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($payload));

$secret = $CFG->jitsi_secret;
$signature = hash_hmac('sha256', $base64urlheader . "." . $base64urlpayload, $secret, true);
$base64urlsignature = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($signature));

$jwt = $base64urlheader . "." . $base64urlpayload . "." . $base64urlsignature;

echo "<script src=\"https://".$CFG->jitsi_domain."/external_api.js\"></script>\n";

echo "<script>\n";
echo "var domain = \"".$CFG->jitsi_domain."\";\n";
echo "var options = {\n";
echo "roomName: \"".$sesionnorm."\",\n";
if ($CFG->jitsi_app_id != null && $CFG->jitsi_secret != null) {
    echo "jwt: \"".$jwt."\",\n";
}
if ($CFG->branch < 36) {
    echo "parentNode: document.querySelector('#region-main .card-body'),\n";
} else {
    echo "parentNode: document.querySelector('#region-main'),\n";
}
if ($CFG->jitsi_showinfo==0){
    echo "interfaceConfigOverwrite:{TOOLBAR_BUTTONS:['microphone', 'camera', 'closedcaptions', 'desktop', 'fullscreen',
          'fodeviceselection', 'hangup', 'profile', 'chat', 'recording',
          'livestreaming', 'etherpad', 'sharedvideo', 'settings', 'raisehand',
          'videoquality', 'filmstrip', 'invite', 'feedback', 'stats', 'shortcuts',
          'tileview', 'videobackgroundblur', 'download', 'help', 'mute-everyone']},\n";
}else{
    echo "interfaceConfigOverwrite:{TOOLBAR_BUTTONS:['microphone', 'camera', 'closedcaptions', 'desktop', 'fullscreen',
        'fodeviceselection', 'hangup', 'profile', 'info', 'chat', 'recording',
        'livestreaming', 'etherpad', 'sharedvideo', 'settings', 'raisehand',
        'videoquality', 'filmstrip', 'invite', 'feedback', 'stats', 'shortcuts',
        'tileview', 'videobackgroundblur', 'download', 'help', 'mute-everyone']},\n";
}

echo "width: '100%',\n";
echo "height: 650,\n";
echo "}\n";
echo "var api = new JitsiMeetExternalAPI(domain, options);\n";
echo "api.executeCommand('displayName', '".$nombre."');\n";
echo "api.executeCommand('toggleVideo');\n";
echo "api.executeCommand('toggleAudio');\n";
echo "api.executeCommand('avatarUrl', '".$avatar."');\n";
echo "</script>\n";

echo $OUTPUT->footer();