<?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_pdfjsfolder_activity_task class
 *
 * @package    mod_pdfjsfolder
 * @copyright  2013 Jonas Nockert <jonasnockert@gmail.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die;

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

/**
 * Provides the steps to perform one complete backup of the Pdfjsfolder
 * instance.
 */
class backup_pdfjsfolder_activity_task extends backup_activity_task {
    /**
     * Define (add) particular settings this activity can have.
     */
    protected function define_my_settings() {
        // No specific settings for this activity.
    }

    /**
     * Define (add) particular steps this activity can have.
     *
     * Defines a backup step to store the instance data in the
     * pdfjsfolder.xml file.
     */
    protected function define_my_steps() {
        $this->add_step(
            new backup_pdfjsfolder_activity_structure_step(
                'pdfjsfolder_structure',
                'pdfjsfolder.xml'
            )
        );
    }

    /**
     * Code the transformations to perform in the activity in
     * order to get transportable (encoded) links (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;

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

        // Link to the list of pdfjsfolder activities.
        $search = "/(" . $base . "\/mod\/pdfjsfolder\/index.php\?id\=)([0-9]+)/";
        $content = preg_replace($search, '$@PDFJSFOLDERINDEX*$2@$', $content);

        // Link to pdfjsfolder view by moduleid.
        $search = "/(" . $base . "\/mod\/pdfjsfolder\/view.php\?id\=)([0-9]+)/";
        $content = preg_replace($search, '$@PDFJSFOLDERVIEWBYID*$2@$', $content);

        return $content;
    }
}
