<?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/>.

/**
 * Filters results to current course only.
 *
 * @package    block_dash
 * @copyright  2020 bdecent gmbh <https://bdecent.de>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace block_dash\local\data_grid\filter;
/**
 * Filters results to current course only.
 *
 * @package block_dash
 */
class current_course_condition extends condition {
    /**
     * Get values from filter based on user selection. All filters must return an array of values.
     *
     * Override in child class to add more values.
     *
     * @return array
     * @throws \coding_exception
     */
    public function get_values() {
        if (!$coursecontext = $this->get_context()->get_course_context(false)) {
            return [null];
        }

        return [$coursecontext->instanceid];
    }

    /**
     * Get condition label.
     *
     * @return string
     * @throws \coding_exception
     */
    public function get_label() {
        if ($label = parent::get_label()) {
            return $label;
        }

        return get_string('currentcourse', 'block_dash');
    }
}
