Proyectos de Subversion Moodle

<?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/>.

/**

 * Download course content confirmation and execution.

 *

 * @package    core

 * @subpackage course

 * @copyright  2020 Michael Hawkins <michaelh@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

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

use core\content;

use core\content\export\zipwriter;

$contextid = required_param('contextid', PARAM_INT);

$isdownload = optional_param('download', 0, PARAM_BOOL);

$coursecontext = context::instance_by_id($contextid);

$courseid = $coursecontext->instanceid;

$courselink = new moodle_url('/course/view.php', ['id' => $courseid]);

if (!\core\content::can_export_context($coursecontext, $USER)) {

    redirect($courselink);

}

$PAGE->set_url('/course/downloadcontent.php', ['contextid' => $contextid]);

require_login($courseid);

$courseinfo = get_fast_modinfo($courseid)->get_course();

$filename = str_replace('/', '', str_replace(' ', '_', $courseinfo->shortname)) . '_' . time() . '.zip';

// If download confirmed, prepare and start the zipstream of the course download content.

if ($isdownload) {

    require_sesskey();

    $exportoptions = null;

    if (!empty($CFG->maxsizeperdownloadcoursefile)) {

        $exportoptions = new stdClass();

        $exportoptions->maxfilesize = $CFG->maxsizeperdownloadcoursefile;

    }

    // Use file writer in debug developer mode, so any errors can be displayed instead of being streamed into the output file.

    if (debugging('', DEBUG_DEVELOPER)) {

        $writer = zipwriter::get_file_writer($filename, $exportoptions);

        ob_start();

        content::export_context($coursecontext, $USER, $writer);

        $content = ob_get_clean();

        // If no errors found, output the file.

        if (empty($content)) {

            send_file($writer->get_file_path(), $filename);

            redirect($courselink);

        } else {

            // If any errors occurred, display them instead of outputting the file.

            debugging("Errors found while producing the download course content output:\n {$content}", DEBUG_DEVELOPER);

        }

    } else {

        // If not developer debugging, stream the output file directly.

        $writer = zipwriter::get_stream_writer($filename, $exportoptions);

        content::export_context($coursecontext, $USER, $writer);

        redirect($courselink);

    }

} else {

    $PAGE->set_title(get_string('downloadcoursecontent', 'course'));

    $PAGE->set_heading(format_string($courseinfo->fullname));

    echo $OUTPUT->header();

    echo $OUTPUT->heading(get_string('downloadcoursecontent', 'course'));

    // Prepare download confirmation information and display it.

    $maxfilesize = display_size($CFG->maxsizeperdownloadcoursefile, 0);

    $downloadlink = new moodle_url('/course/downloadcontent.php', ['contextid' => $contextid, 'download' => 1]);

    echo $OUTPUT->confirm(get_string('downloadcourseconfirmation', 'course', $maxfilesize), $downloadlink, $courselink);

}