Elep

<?php
/**
 * @package         Articles Anywhere
 * @version         8.5.2
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            http://www.regularlabs.com
 * @copyright       Copyright © 2018 Regular Labs All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

namespace RegularLabs\Plugin\System\ArticlesAnywhere\Helpers;

use Joomla\CMS\Date\Date as JDate;
use Joomla\CMS\Factory as JFactory;
use Joomla\CMS\HTML\HTMLHelper as JHtml;
use Joomla\CMS\Language\Text as JText;
use RegularLabs\Library\Date as RL_Date;
use RegularLabs\Library\RegEx as RL_RegEx;

defined('_JEXEC') or die;

class ValueHelper
{
	public static function placeholderToDate($value)
	{
		if (in_array($value, [
			'NOW',
			'now()',
			'JFactory::getDate()',
		]))
		{
			$date = new JDate('now', JFactory::getConfig()->get('offset', 'UTC'));

return $date->toSql();
		}

$regex = '^date$'
			. '(?:\'(?<time>.*?)\')?'
			. '(?:,\s*\'(?<format>.*?)\')?'
			. '$$';

if ( ! RL_RegEx::match($regex, $value, $match))
		{
			return false;
		}

$time   = isset($match['time']) ? $match['time'] : 'now';
		$format = isset($match['format']) ? $match['format'] : 'Y-m-d H:s:i';

if ( ! isset($match['format']))
		{
			$time = date('Y-m-d', strtotime($time));
		}

$date = new JDate($time, JFactory::getConfig()->get('offset', 'UTC'));

return $date->format($format);
	}

public static function isDateValue($value)
	{
		// Check if string could be a date

if (is_array($value))
		{
			return false;
		}

if (
			// Dates must contain a '-' and not letters
			(strpos($value, '-') == false)
			|| RL_RegEx::match('[a-z]', $value)
			// Check string it passes a simple strtotime
			|| ! strtotime($value)
		)
		{
			return false;
		}

return true;
	}

public static function dateToString($value, $attributes)
	{
		$showtime        = isset($attributes->showtime) ? $attributes->showtime : true;
		$format          = isset($attributes->format) ? $attributes->format : '';
		$is_custom_field = isset($attributes->is_custom_field) ? $attributes->is_custom_field : false;

if (empty($format))
		{
			$format = $showtime ? JText::_('DATE_FORMAT_LC2') : JText::_('DATE_FORMAT_LC1');
		}

if (strpos($format, '%') !== false)
		{
			$format = RL_Date::strftimeToDateFormat($format);
		}

// Don't pass custom fields through JHtml, as it will double the offset
		if ($is_custom_field)
		{
			return (new JDate($value))->format($format);
		}

return JHtml::_('date', $value, $format);
	}
}