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<?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    mod_wiki
 * @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 the restore_wiki_activity_task
 */

/**
 * Structure step to restore one wiki activity
 */
class restore_wiki_activity_structure_step extends restore_activity_structure_step {

protected function define_structure() {

$paths = array();
        $userinfo = $this->get_setting_value('userinfo');

$paths[] = new restore_path_element('wiki', '/activity/wiki');
        if ($userinfo) {
            $paths[] = new restore_path_element('wiki_subwiki', '/activity/wiki/subwikis/subwiki');
            $paths[] = new restore_path_element('wiki_page', '/activity/wiki/subwikis/subwiki/pages/page');
            $paths[] = new restore_path_element('wiki_version', '/activity/wiki/subwikis/subwiki/pages/page/versions/version');
            $paths[] = new restore_path_element('wiki_tag', '/activity/wiki/subwikis/subwiki/pages/page/tags/tag');
            $paths[] = new restore_path_element('wiki_synonym', '/activity/wiki/subwikis/subwiki/synonyms/synonym');
            $paths[] = new restore_path_element('wiki_link', '/activity/wiki/subwikis/subwiki/links/link');
        }

// Return the paths wrapped into standard activity structure
        return $this->prepare_activity_structure($paths);
    }

protected function process_wiki($data) {
        global $DB;

$data = (object)$data;
        $oldid = $data->id;
        $data->course = $this->get_courseid();

// Any changes to the list of dates that needs to be rolled should be same during course restore and course reset.
        // See MDL-9367.
        $data->editbegin = $this->apply_date_offset($data->editbegin);
        $data->editend = $this->apply_date_offset($data->editend);

// insert the wiki record
        $newitemid = $DB->insert_record('wiki', $data);
        // immediately after inserting "activity" record, call this
        $this->apply_activity_instance($newitemid);
    }

protected function process_wiki_subwiki($data) {
        global $DB;

$data = (object) $data;
        $oldid = $data->id;
        $data->wikiid = $this->get_new_parentid('wiki');

// If the groupid is not equal to zero, get the mapping for the group.
        if ((int) $data->groupid !== 0) {
            $data->groupid = $this->get_mappingid('group', $data->groupid);
        }

// If the userid is not equal to zero, get the mapping for the user.
        if ((int) $data->userid !== 0) {
            $data->userid = $this->get_mappingid('user', $data->userid);
        }

// If these values are not equal to false then a mapping was successfully made.
        if ($data->groupid !== false && $data->userid !== false) {
            $newitemid = $DB->insert_record('wiki_subwikis', $data);
        } else {
            $newitemid = false;
        }

$this->set_mapping('wiki_subwiki', $oldid, $newitemid, true);
    }

protected function process_wiki_page($data) {
        global $DB;

$data = (object) $data;
        $oldid = $data->id;
        $data->subwikiid = $this->get_new_parentid('wiki_subwiki');
        $data->userid = $this->get_mappingid('user', $data->userid);

// Check that we were able to get a parentid for this page.
        if ($data->subwikiid !== false) {
            $newitemid = $DB->insert_record('wiki_pages', $data);
        } else {
            $newitemid = false;
        }

$this->set_mapping('wiki_page', $oldid, $newitemid, true);
    }

protected function process_wiki_version($data) {
        global $DB;

$data = (object)$data;
        $oldid = $data->id;
        $data->pageid = $this->get_new_parentid('wiki_page');
        $data->userid = $this->get_mappingid('user', $data->userid);

$newitemid = $DB->insert_record('wiki_versions', $data);
        $this->set_mapping('wiki_version', $oldid, $newitemid);
    }
    protected function process_wiki_synonym($data) {
        global $DB;

$data = (object)$data;
        $oldid = $data->id;
        $data->subwikiid = $this->get_new_parentid('wiki_subwiki');
        $data->pageid = $this->get_mappingid('wiki_page', $data->pageid);

$newitemid = $DB->insert_record('wiki_synonyms', $data);
        // No need to save this mapping as far as nothing depend on it
        // (child paths, file areas nor links decoder)
    }
    protected function process_wiki_link($data) {
        global $DB;

$data = (object)$data;
        $oldid = $data->id;
        $data->subwikiid = $this->get_new_parentid('wiki_subwiki');
        $data->frompageid = $this->get_mappingid('wiki_page', $data->frompageid);
        $data->topageid = $this->get_mappingid('wiki_page', $data->topageid);

$newitemid = $DB->insert_record('wiki_links', $data);
        // No need to save this mapping as far as nothing depend on it
        // (child paths, file areas nor links decoder)
    }

protected function process_wiki_tag($data) {
        global $CFG, $DB;

$data = (object)$data;
        $oldid = $data->id;

if (!core_tag_tag::is_enabled('mod_wiki', 'wiki_pages')) { // Tags disabled in server, nothing to process.
            return;
        }

$tag = $data->rawname;
        $itemid = $this->get_new_parentid('wiki_page');
        $wikiid = $this->get_new_parentid('wiki');

$context = context_module::instance($this->task->get_moduleid());
        core_tag_tag::add_item_tag('mod_wiki', 'wiki_pages', $itemid, $context, $tag);
    }

protected function after_execute() {
        // Add wiki related files, no need to match by itemname (just internally handled context)
        $this->add_related_files('mod_wiki', 'intro', null);
        $this->add_related_files('mod_wiki', 'attachments', 'wiki_subwiki');
    }
}