MDL-21432 backup - root task, inforef and users handling completed, various fixes

[moodle.git] / backup / moodle2 / restore_stepslib.php

<?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/>.

/**
 * @package moodlecore
 * @subpackage backup-moodle2
 * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * Define all the restore steps that will be used by common tasks in restore
 */

/**
 * delete old directories and conditionally create backup_temp_ids table
 */
class restore_create_and_clean_temp_stuff extends restore_execution_step {

    protected function define_execution() {
        backup_helper::delete_old_backup_dirs(time() - (4 * 60 * 60));    // Delete > 4 hours temp dirs
        $exists = restore_controller_dbops::create_backup_ids_temp_table($this->get_restoreid()); // Create temp table conditionally
        // If the table already exists, it's because restore_prechecks have been executed in the same
        // request (without problems) and it already contains a bunch of preloaded information (users...)
        // that we aren't going to execute again
        if ($exists) { // Inform plan about preloaded information
            $this->task->set_preloaded_information();
        }
    }
}

/**
 * delete the temp dir used by backup/restore (conditionally),
 * delete old directories and drop temp ids table
 */
class restore_drop_and_clean_temp_stuff extends restore_execution_step {

    protected function define_execution() {
        global $CFG;
        backup_controller_dbops::drop_backup_ids_temp_table($this->get_restoreid()); // Drop ids temp table
        backup_helper::delete_old_backup_dirs(time() - (4 * 60 * 60));               // Delete > 4 hours temp dirs
        if (empty($CFG->keeptempdirectoriesonbackup)) { // Conditionally
            backup_helper::delete_backup_dir($this->get_restoreid()); // Empty backup dir
        }
    }
}

/*
 * Execution step that, *conditionally* (if there isn't preloaded information)
 * will load the inforef files for all the included course/section/activity tasks
 * to backup_temp_ids. They will be stored with "xxxxref" as itemname
 */
class restore_load_included_inforef_records extends restore_execution_step {

    protected function define_execution() {

        if ($this->task->get_preloaded_information()) { // if info is already preloaded, nothing to do
            return;
        }

        // Get all the included inforef files
        $files = restore_dbops::get_needed_inforef_files($this->get_restoreid());
        foreach ($files as $file) {
            restore_dbops::load_inforef_to_tempids($this->get_restoreid(), $file); // Load each inforef file to temp_ids
        }
    }
}

/**
 * Execution step that, *conditionally* (if there isn't preloaded information
 * and users have been selected in settings, will load all the needed users
 * to backup_temp_ids. They will be stored with "user" itemname and with
 * their original contextid as paremitemid.
 */
class restore_load_included_users extends restore_execution_step {

    protected function define_execution() {

        if ($this->task->get_preloaded_information()) { // if info is already preloaded, nothing to do
            return;
        }
        if (!$this->task->get_setting('users')) { // No userinfo being restored, nothing to do
            return;
        }
        $file = $this->get_basepath() . '/users.xml';
        restore_dbops::load_users_to_tempids($this->get_restoreid(), $file); // Load needed users to temp_ids
    }
}

/**
 * Execution step that, *conditionally* (if there isn't preloaded information
 * and users have been selected in settings, will process all the needed users
 * in order to decide and perform any action with them (create / map / error)
 * Note: Any error will cause exception, as far as this is the same processing
 * than the one into restore prechecks (that should have stopped process earlier)
 */
 class restore_process_included_users extends restore_execution_step {

    protected function define_execution() {

        if ($this->task->get_preloaded_information()) { // if info is already preloaded, nothing to do
            return;
        }
        if (!$this->task->get_setting('users')) { // No userinfo being restored, nothing to do
            return;
        }
        restore_dbops::process_included_users($this->get_restoreid(), $this->task->get_courseid(), $this->task->get_userid(), $this->task->is_samesite());
    }
}

/*
 * Structure step that will read the course.xml file, loading it and performing
 * various actions depending of the site/restore settings
 */
class restore_course_structure_step extends restore_structure_step {

    protected function define_structure() {

        $course = new restore_path_element('course', '/course', true); // Grouped
        $category = new restore_path_element('category', '/course/category');
        $tag = new restore_path_element('tag', '/course/tags/tag');
        $allowed = new restore_path_element('allowed', '/course/allowed_modules/module');

        return array($course, $category, $tag, $allowed);
    }

    // Processing functions go here
    public function process_course($data) {
        print_object('stopped before processing course. Continue here');
    }

}