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directaccess.php
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directaccess.php
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<?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/>.
/**
* Direct access to the given video.
* @package block_opencast
* @copyright 2022 Farbod Zamani Boroujeni <zamani@elan-ev.de>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
use block_opencast\local\apibridge;
use block_opencast\local\lti_helper;
use core\output\notification;
use tool_opencast\local\settings_api;
require_once('../../config.php');
require_once($CFG->dirroot . '/mod/lti/locallib.php');
require_once($CFG->dirroot . '/lib/oauthlib.php');
global $PAGE, $OUTPUT, $CFG;
require_once($CFG->dirroot . '/repository/lib.php');
$courseid = required_param('courseid', PARAM_INT);
$videoid = required_param('video_identifier', PARAM_ALPHANUMEXT);
$mediaid = required_param('mediaid', PARAM_ALPHANUMEXT);
$ocinstanceid = optional_param('ocinstanceid', settings_api::get_default_ocinstance()->id, PARAM_INT);
$baseurl = new moodle_url('/blocks/opencast/directaccess.php',
['courseid' => $courseid, 'video_identifier' => $videoid,
'mediaid' => $mediaid, 'ocinstanceid' => $ocinstanceid, ]);
$PAGE->set_url($baseurl);
$redirecturl = new moodle_url('/blocks/opencast/index.php', ['courseid' => $courseid, 'ocinstanceid' => $ocinstanceid]);
require_login($courseid, false);
$PAGE->set_pagelayout('incourse');
$PAGE->set_title(get_string('directaccesstovideo', 'block_opencast'));
$PAGE->set_heading(get_string('pluginname', 'block_opencast'));
$PAGE->navbar->add(get_string('pluginname', 'block_opencast'), $redirecturl);
$PAGE->navbar->add(get_string('directaccesstovideo', 'block_opencast'), $baseurl);
// Capability check.
$coursecontext = context_course::instance($courseid);
try {
require_capability('block/opencast:directaccessvideolink', $coursecontext);
} catch (required_capability_exception $e) {
// We gently redirect to the course main view page in case of capability exception, to handle the behat more sufficiently.
$redirecttocourse = new moodle_url('/course/view.php', ['id' => $courseid]);
redirect($redirecttocourse,
get_string('nopermissions', 'error', get_string('opencast:directaccessvideolink', 'block_opencast')),
null,
notification::NOTIFY_ERROR);
}
$apibridge = apibridge::get_instance($ocinstanceid);
$result = $apibridge->get_opencast_video($videoid, true);
if (!$result->error) {
$video = $result->video;
if ($video->is_accessible) {
$directaccessurl = '';
foreach ($video->publications as $publication) {
if ($publication->channel == get_config('block_opencast', 'direct_access_channel_' . $ocinstanceid)) {
foreach ($publication->media as $media) {
if ($media->id === $mediaid) {
$directaccessurl = $media->url;
break 2;
}
}
}
}
if (empty($directaccessurl)) {
redirect($redirecturl,
get_string('video_not_accessible', 'block_opencast'),
null,
notification::NOTIFY_ERROR);
}
$endpoint = settings_api::get_apiurl($ocinstanceid);
// Make sure the endpoint is correct.
if (strpos($endpoint, 'http') !== 0) {
$endpoint = 'http://' . $endpoint;
}
$apibridge = apibridge::get_instance($ocinstanceid);
$consumerkey = $apibridge->get_lti_consumerkey();
$consumersecret = $apibridge->get_lti_consumersecret();
if (empty($consumerkey)) {
redirect($directaccessurl);
}
$ltiendpoint = rtrim($endpoint, '/') . '/lti';
// Create parameters.
$params = lti_helper::create_lti_parameters($consumerkey, $consumersecret,
$ltiendpoint, $directaccessurl);
$renderer = $PAGE->get_renderer('block_opencast');
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('directaccesstovideo', 'block_opencast'));
echo $renderer->render_lti_form($ltiendpoint, $params);
$waitingtime = 0;
if (defined('BEHAT_SITE_RUNNING')) {
$waitingtime = 2;
}
$PAGE->requires->js_call_amd('block_opencast/block_lti_form_handler', 'init', [$waitingtime]);
echo $OUTPUT->footer();
} else {
redirect($redirecturl,
get_string('video_not_accessible', 'block_opencast'),
null,
notification::NOTIFY_ERROR);
}
} else {
redirect($redirecturl,
get_string('video_retrieval_failed', 'block_opencast'),
null,
notification::NOTIFY_ERROR);
}