DateViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Format;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\CMS\Core\Utility\MathUtility;
use TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3\CMS\Fluid\Core\ViewHelper\Exception;
use TYPO3\CMS\Fluid\Core\ViewHelper\Facets\CompilableInterface;

class DateViewHelper extends AbstractViewHelper implements CompilableInterface
{
    protected $escapingInterceptorEnabled = false;

    public function render($date = null, $format = '', $base = null)
    {
        return static::renderStatic(
            [
                'date' => $date,
                'format' => $format,
                'base' => $base
            ],
            $this->buildRenderChildrenClosure(),
            $this->renderingContext
        );
    }

    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
        $date = $arguments['date'];
        $format = $arguments['format'];
        $base = $arguments['base'] === null ? time() : $arguments['base'];
        if (is_string($base)) {
            $base = trim($base);
        }

        if ($format === '') {
            $format = $GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] ?: 'Y-m-d';
        }

        if ($date === null) {
            $date = $renderChildrenClosure();
            if ($date === null) {
                return '';
            }
        }

        if (is_string($date)) {
            $date = trim($date);
        }

        if ($date === '') {
            $date = 'now';
        }

        if (!$date instanceof \DateTimeInterface) {
            try {
                $base = $base instanceof \DateTimeInterface ? $base->format('U') : strtotime((MathUtility::canBeInterpretedAsInteger($base) ? '@' : '') . $base);
                $dateTimestamp = strtotime((MathUtility::canBeInterpretedAsInteger($date) ? '@' : '') . $date, $base);
                $date = new \DateTime('@' . $dateTimestamp);
                $date->setTimezone(new \DateTimeZone(date_default_timezone_get()));
            } catch (\Exception $exception) {
                throw new Exception('"' . $date . '" could not be parsed by \DateTime constructor: ' . $exception->getMessage(), 1241722579);
            }
        }

        if (strpos($format, '%') !== false) {
            return strftime($format, $date->format('U'));
        } else {
            return $date->format($format);
        }
    }
}