<?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/>.

/**
 * View for deleting a draft video which has still the status readytoupload
 *
 * @package    tool_opencast
 * @copyright  2020 Educational Technologies, Graz, University of Technology
 * @author     Behnam Taraghi
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once('../../../config.php');

use tool_opencast\local\upload_helper;
use core\output\notification;
use tool_opencast\local\settings_api;

global $PAGE, $OUTPUT, $CFG;

$identifier = required_param('identifier', PARAM_ALPHANUMEXT);
$courseid = required_param('courseid', PARAM_INT);
$action = optional_param('action', '', PARAM_ALPHA);
$ocinstanceid = optional_param('ocinstanceid', settings_api::get_default_ocinstance()->id, PARAM_INT);
$redirectpage = optional_param('redirectpage', null, PARAM_ALPHA);
$series = optional_param('series', null, PARAM_ALPHANUMEXT);

$baseurl = new moodle_url('/admin/tool/opencast/deletedraft.php',
    ['identifier' => $identifier, 'courseid' => $courseid, 'ocinstanceid' => $ocinstanceid,
        'redirectpage' => $redirectpage, 'series' => $series, ]);
$PAGE->set_url($baseurl);

require_login($courseid, false);

$PAGE->set_pagelayout('incourse');
$PAGE->set_title(get_string('servicename', 'tool_opencast'));
$PAGE->set_heading(get_string('servicename', 'tool_opencast'));

if ($redirectpage == 'overviewvideos') {
    $redirecturl = new moodle_url('/admin/tool/opencast/overview_videos.php', ['ocinstanceid' => $ocinstanceid,
        'series' => $series, ]);
} else {
    $redirecturl = new moodle_url('/admin/tool/opencast/index.php', ['courseid' => $courseid, 'ocinstanceid' => $ocinstanceid]);
}

$PAGE->navbar->add(get_string('servicename', 'tool_opencast'), $redirecturl);
$PAGE->navbar->add(get_string('deletedraft', 'tool_opencast'), $baseurl);

// Capability check.
// the one who is allowed to add the video is also allowed to delete the video before it is uploaded.
$coursecontext = context_course::instance($courseid);
require_capability('tool/opencast:addvideo', $coursecontext);

$uploadjobs = upload_helper::get_upload_jobs($ocinstanceid, $courseid);
$jobtodelete = null;
foreach ($uploadjobs as $uploadjob) {
    if ($uploadjob->id == $identifier) {
        $jobtodelete = $uploadjob;
        break;
    }
}
if (!$jobtodelete) {
    $message = get_string('videodraftnotfound', 'tool_opencast');
    redirect($redirecturl, $message, null, notification::NOTIFY_WARNING);
}
$allowedstatuses = [
    upload_helper::STATUS_READY_TO_UPLOAD,
    upload_helper::STATUS_ARCHIVED_FAILED_UPLOAD,
];
if (!in_array($jobtodelete->status, $allowedstatuses)) {
    $message = get_string('videodraftnotdeletable', 'tool_opencast',
        upload_helper::get_status_string($jobtodelete->status));
    redirect($redirecturl, $message, null, notification::NOTIFY_WARNING);
}


if (($action == 'delete') && confirm_sesskey()) {
    $deleted = upload_helper::delete_video_draft($jobtodelete);

    $message = $deleted ? get_string('videodraftdeletionsucceeded', 'tool_opencast') :
        get_string('videodraftnotdeletable', 'tool_opencast',
            upload_helper::get_status_string($jobtodelete->status));
    redirect($redirecturl, $message);
}

$html = $OUTPUT->notification(get_string('deletedraftdesc', 'tool_opencast'), 'error');

$renderer = $PAGE->get_renderer('tool_opencast');
$html .= $renderer->render_upload_jobs($ocinstanceid, [$jobtodelete], false);

$label = get_string('dodeletedraft', 'tool_opencast');
$params = [
    'identifier' => $identifier,
    'courseid' => $courseid,
    'action' => 'delete',
    'ocinstanceid' => $ocinstanceid,
    'redirectpage' => $redirectpage,
    'series' => $series,
];
$urldelete = new moodle_url('/admin/tool/opencast/deletedraft.php', $params);
$html .= $OUTPUT->confirm($label, $urldelete, $redirecturl);

echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('deletedraft', 'tool_opencast'));
echo $html;
echo $OUTPUT->footer();
