C:/xampp/htdocs/moodle/mod/workshop/form/comments/backup/moodle2/backup_workshopform_comments_subplugin.class.php

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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/>.

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

class backup_workshopform_comments_subplugin extends backup_subplugin {

    protected function define_workshop_subplugin_structure() {

        // XML nodes declaration
        $subplugin = $this->get_subplugin_element(); // virtual optigroup element
        $subpluginwrapper = new backup_nested_element($this->get_recommended_name());
        $subplugindimension = new backup_nested_element('workshopform_comments_dimension', array('id'), array(
            'sort', 'description', 'descriptionformat'));

        // connect XML elements into the tree
        $subplugin->add_child($subpluginwrapper);
        $subpluginwrapper->add_child($subplugindimension);

        // set source to populate the data
        $subplugindimension->set_source_table('workshopform_comments', array('workshopid' => backup::VAR_ACTIVITYID));

        // file annotations
        $subplugindimension->annotate_files('workshopform_comments', 'description', 'id');

        return $subplugin;
    }

    protected function define_referenceassessment_subplugin_structure() {
        return $this->dimension_grades_structure('workshopform_comments_referencegrade');
    }

    protected function define_exampleassessment_subplugin_structure() {
        return $this->dimension_grades_structure('workshopform_comments_examplegrade');
    }

    protected function define_assessment_subplugin_structure() {
        return $this->dimension_grades_structure('workshopform_comments_grade');
    }

    // internal private methods

    private function dimension_grades_structure($elementname) {

        // create XML elements
        $subplugin = $this->get_subplugin_element(); // virtual optigroup element
        $subpluginwrapper = new backup_nested_element($this->get_recommended_name());
        $subplugingrade = new backup_nested_element($elementname, array('id'), array(
            'dimensionid', 'peercomment', 'peercommentformat'));

        // connect XML elements into the tree
        $subplugin->add_child($subpluginwrapper);
        $subpluginwrapper->add_child($subplugingrade);

        // set source to populate the data
        $subplugingrade->set_source_sql(
            "SELECT id, dimensionid, peercomment, peercommentformat
               FROM {workshop_grades}
              WHERE strategy = 'comments' AND assessmentid = ?",
              array(backup::VAR_PARENTID));

        return $subplugin;
    }
}