admin_setting_configdatetime.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/>.

/**
 * Admin setting for date and time
 *
 * @package local_outage
 * @copyright 2018 The Open University
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace local_outage;

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

/**
 * Admin setting for date and time
 */
class admin_setting_configdatetime extends \admin_setting {

    /**
     * Constructor.
     *
     * @param string $name setting for date/time
     * @param string $visiblename localised
     * @param string $description long localised info
     */
    public function __construct($name, $visiblename, $description) {
        parent::__construct($name, $visiblename, $description, '0');
    }

    /**
     * Gets the selected date/time.
     *
     * @return string Current date/time value
     */
    public function get_setting() {
        $result = $this->config_read($this->name);
        if (is_null($result)) {
            return null;
        }
        return $result;
    }

    /**
     * Stores the date/time.
     *
     * @param string $data Time value or zero
     * @return string Empty string if OK, error message otherwise
     */
    public function write_setting($data) {

        if (!empty($data['enabled'])) {
            $value = make_timestamp($data['years'], $data['months'], $data['days'],
                    $data['hours'], $data['minutes'], 0);
        } else {
            $value = 0;
        }

        $result = $this->config_write($this->name, $value);
        return $result ? '' : get_string('errorsetting', 'admin');
    }

    /**
     * Returns XHTML date and time select fields and checkbox.
     *
     * @param string $data 0 or a time value
     * @param string $query Search query
     * @return string XHTML time select fields and checkbox and wrapping div(s).
     */
    public function output_html($data, $query = '') {
        global $OUTPUT;

        if ($data) {
            $dateinfo = usergetdate($data);
        } else {
            $dateinfo = usergetdate(time());
        }

        $context = (object) [
            'id' => $this->get_id(),
            'name' => $this->get_full_name(),
            'years' => array_map(function($i) use ($dateinfo) {
                return [
                    'value' => $i,
                    'name' => $i,
                    'selected' => $i == $dateinfo['year']
                ];
            }, range(2018, 2028)),
            'months' => array_map(function($i) use ($dateinfo) {
                return [
                    'value' => $i,
                    'name' => date_format_string(
                            strtotime('2010-' . ($i < 10 ? '0' : '') . $i . '-01'), '%B'),
                    'selected' => $i == $dateinfo['mon']
                ];
            }, range(1, 12)),
            'days' => array_map(function($i) use ($dateinfo) {
                return [
                    'value' => $i,
                    'name' => ($i < 10 ? '0' : '') . $i,
                    'selected' => $i == $dateinfo['mday']
                ];
            }, range(1, 31)),
            'hours' => array_map(function($i) use ($dateinfo) {
                return [
                    'value' => $i,
                    'name' => $i,
                    'selected' => $i == $dateinfo['hours']
                ];
            }, range(0, 23)),
            'minutes' => array_map(function($i) use ($dateinfo) {
                return [
                    'value' => $i,
                    'name' => ($i < 10 ? '0' : '') . $i,
                    'selected' => $i == $dateinfo['minutes']
                ];
            }, range(0, 59, 1)),
            'enabled' => $data ? true : false
        ];

        $element = $OUTPUT->render_from_template('local_outage/setting_configdatetime', $context);

        return format_admin_setting($this, $this->visiblename, $element, $this->description,
                $this->get_id() . '_enabled', '', null, $query);
    }
}