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/>.

/**

 * Defines backup_resource_activity_task class

 *

 * @package     mod_resource

 * @category    backup

 * @copyright   2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}

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

 */

defined('MOODLE_INTERNAL') || die;

require_once($CFG->dirroot . '/mod/resource/backup/moodle2/backup_resource_stepslib.php');

/**

 * Provides the steps to perform one complete backup of the Resource instance

 */

class backup_resource_activity_task extends backup_activity_task {

    /**

     * @param bool $resourceoldexists True if there are records in the resource_old table.

     */

    protected static $resourceoldexists = null;

    /**

     * No specific settings for this activity

     */

    protected function define_my_settings() {

    }

    /**

     * Defines a backup step to store the instance data in the resource.xml file

     */

    protected function define_my_steps() {

        $this->add_step(new backup_resource_activity_structure_step('resource_structure', 'resource.xml'));

    }

    /**

     * Encodes URLs to the index.php and view.php scripts

     *

     * @param string $content some HTML text that eventually contains URLs to the activity instance scripts

     * @return string the content with the URLs encoded

     */

    public static function encode_content_links($content) {

        global $CFG, $DB;

        $base = preg_quote($CFG->wwwroot,"/");

        // Link to the list of resources.

        $search="/(".$base."\/mod\/resource\/index.php\?id\=)([0-9]+)/";

        $content= preg_replace($search, '$@RESOURCEINDEX*$2@$', $content);

        // Link to resource view by moduleid.

        $search = "/(".$base."\/mod\/resource\/view.php\?id\=)([0-9]+)/";

        // Link to resource view by recordid

        $search2 = "/(".$base."\/mod\/resource\/view.php\?r\=)([0-9]+)/";

        // Check whether there are contents in the resource old table.

        if (static::$resourceoldexists === null) {

            static::$resourceoldexists = $DB->record_exists('resource_old', array());

        }

        // If there are links to items in the resource_old table, rewrite them to be links to the correct URL

        // for their new module.

        if (static::$resourceoldexists) {

            // Match all of the resources.

            $result = preg_match_all($search, $content, $matches, PREG_PATTERN_ORDER);

            // Course module ID resource links.

            if ($result) {

                list($insql, $params) = $DB->get_in_or_equal($matches[2]);

                $oldrecs = $DB->get_records_select('resource_old', "cmid $insql", $params, '', 'cmid, newmodule');

                for ($i = 0; $i < count($matches[0]); $i++) {

                    $cmid = $matches[2][$i];

                    if (isset($oldrecs[$cmid])) {

                        // Resource_old item, rewrite it

                        $replace = '$@' . strtoupper($oldrecs[$cmid]->newmodule) . 'VIEWBYID*' . $cmid . '@$';

                    } else {

                        // Not in the resource old table, don't rewrite

                        $replace = '$@RESOURCEVIEWBYID*'.$cmid.'@$';

                    }

                    $content = str_replace($matches[0][$i], $replace, $content);

                }

            }

            $matches = null;

            $result = preg_match_all($search2, $content, $matches, PREG_PATTERN_ORDER);

            // No resource links.

            if (!$result) {

                return $content;

            }

            // Resource ID links.

            list($insql, $params) = $DB->get_in_or_equal($matches[2]);

            $oldrecs = $DB->get_records_select('resource_old', "oldid $insql", $params, '', 'oldid, cmid, newmodule');

            for ($i = 0; $i < count($matches[0]); $i++) {

                $recordid = $matches[2][$i];

                if (isset($oldrecs[$recordid])) {

                    // Resource_old item, rewrite it

                    $replace = '$@' . strtoupper($oldrecs[$recordid]->newmodule) . 'VIEWBYID*' . $oldrecs[$recordid]->cmid . '@$';

                    $content = str_replace($matches[0][$i], $replace, $content);

                }

            }

        } else {

            $content = preg_replace($search, '$@RESOURCEVIEWBYID*$2@$', $content);

        }

        return $content;

    }

}