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/>.

/**

 * Utility class for browsing of system files.

 *

 * @package    core_files

 * @copyright  2008 Petr Skoda (http://skodak.org)

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

 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir.'/filebrowser/file_info_context_coursecat.php');

/**

 * Represents the system context in the tree navigated by {@link file_browser}.

 *

 * @package    core_files

 * @copyright  2008 Petr Skoda (http://skodak.org)

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

 */

class file_info_context_system extends file_info_context_coursecat {

    /**

     * Constructor

     *

     * @param file_browser $browser file_browser instance

     * @param stdClass $context context object

     */

    public function __construct($browser, $context) {

        parent::__construct($browser, $context, (object)['id' => 0, 'parent' => 0, 'visible' => 1]);

    }

    /**

     * Return information about this specific part of context level

     *

     * @param string $component component

     * @param string $filearea file area

     * @param int $itemid item ID

     * @param string $filepath file path

     * @param string $filename file name

     * @return file_info|null file_info instance or null if not found or access not allowed

     */

    public function get_file_info($component, $filearea, $itemid, $filepath, $filename) {

        if (empty($component)) {

            return $this;

        }

        $methodname = "get_area_{$component}_{$filearea}";

        if (method_exists($this, $methodname)) {

            return $this->$methodname($itemid, $filepath, $filename);

        }

        return null;

    }

    /**

     * Gets a stored file for the backup course filearea directory.

     *

     * @param int $itemid item ID

     * @param string $filepath file path

     * @param string $filename file name

     * @return file_info|null file_info instance or null if not found or access not allowed

     */

    protected function get_area_backup_course($itemid, $filepath, $filename) {

        global $CFG;

        if (!isloggedin()) {

            return null;

        }

        if (!has_any_capability(array('moodle/backup:backupcourse', 'moodle/restore:restorecourse'), $this->context)) {

            return null;

        }

        if (is_null($itemid)) {

            return $this;

        }

        $fs = get_file_storage();

        $filepath = is_null($filepath) ? '/' : $filepath;

        $filename = is_null($filename) ? '.' : $filename;

        if (!$storedfile = $fs->get_file($this->context->id, 'backup', 'course', 0, $filepath, $filename)) {

            if ($filepath === '/' && $filename === '.') {

                $storedfile = new virtual_root_file($this->context->id, 'backup', 'course', 0);

            } else {

                // Not found.

                return null;

            }

        }

        $downloadable = has_capability('moodle/backup:downloadfile', $this->context);

        $uploadable = has_capability('moodle/restore:uploadfile', $this->context);

        $urlbase = $CFG->wwwroot . '/pluginfile.php';

        return new file_info_stored($this->browser, $this->context, $storedfile, $urlbase,

            get_string('coursebackup', 'repository'), false, $downloadable, $uploadable, false);

    }

    /**

     * Returns localised visible name.

     *

     * @return string

     */

    public function get_visible_name() {

        return get_string('arearoot', 'repository');

    }

    /**

     * Whether or not new files or directories can be added

     *

     * @return bool

     */

    public function is_writable() {

        return false;

    }

    /**

     * Whether or not this is a directory

     *

     * @return bool

     */

    public function is_directory() {

        return true;

    }

    /**

     * Returns parent file_info instance

     *

     * @return file_info|null file_info instance or null for root

     */

    public function get_parent() {

        return null;

    }

}