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Classes/System/DateTime/FormatService.php

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+<?php
+namespace WapplerSystems\Meilisearch\System\DateTime;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2011-2016 Timo Schmidt <timo.hund@dkd.de>
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project 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.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script 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.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+use DateTime;
+use DateTimeZone;
+
+/**
+ * Testcase to check if the configuration object can be used as expected
+ *
+ * @author Hendrik Putzek <hendrik.putzek@dkd.de>
+ * @author Timo Hund <timo.hund@dkd.de>
+ */
+class FormatService
+{
+    const SOLR_ISO_DATETIME_FORMAT = 'Y-m-d\TH:i:s\Z';
+
+    /**
+     * @see http://php.net/manual/de/function.date.php for formatting options
+     * @param string $input the passed date string
+     * @param string $inputFormat the input format that should be used for parsing
+     * @param string $outputFormat The output format, when nothing is passed
+     * $GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] will be used or Y-m-d when nothing is configured
+     * @param DateTimeZone $timezone
+     * @return \DateTime|string
+     */
+    public function format($input = '', $inputFormat = 'Y-m-d\TH:i:s\Z', $outputFormat = '', $timezone = null)
+    {
+        if ($outputFormat === '') {
+            // when no value was passed we us the TYPO3 configured or fallback to Y-m-d
+            $outputFormat = $GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] ?: 'Y-m-d';
+        }
+
+        // try to create DateTime object
+        $timezone = $timezone ?? new DateTimeZone(date_default_timezone_get());
+        return $this->getFormattedDate($input, $inputFormat, $outputFormat, $timezone);
+    }
+
+    /**
+     * Converts a date from unix timestamp to ISO 8601 format.
+     *
+     * @param int $timestamp unix timestamp
+     * @return string the date in ISO 8601 format
+     */
+    public function timestampToIso($timestamp)
+    {
+        return date(self::SOLR_ISO_DATETIME_FORMAT, $timestamp);
+    }
+
+    /**
+     * Converts a date from ISO 8601 format to unix timestamp.
+     *
+     * @param string $isoTime date in ISO 8601 format
+     * @return int unix timestamp
+     */
+    public function isoToTimestamp($isoTime)
+    {
+        $dateTime = \DateTime::createFromFormat(self::SOLR_ISO_DATETIME_FORMAT,
+            $isoTime);
+        return $dateTime ? (int)$dateTime->format('U') : 0;
+    }
+
+    /**
+     * Converts a date from unix timestamp to ISO 8601 format in UTC timezone.
+     *
+     * @param int $timestamp unix timestamp
+     * @return string the date in ISO 8601 format
+     */
+    public function timestampToUtcIso($timestamp)
+    {
+        return gmdate(self::SOLR_ISO_DATETIME_FORMAT, $timestamp);
+    }
+
+    /**
+     * Converts a date from ISO 8601 format in UTC timezone to unix timestamp.
+     *
+     * @param string $isoTime date in ISO 8601 format
+     * @return int unix timestamp
+     */
+    public function utcIsoToTimestamp($isoTime)
+    {
+        $utcTimeZone = new \DateTimeZone('UTC');
+        $dateTime = \DateTime::createFromFormat(self::SOLR_ISO_DATETIME_FORMAT,
+            $isoTime, $utcTimeZone);
+        return $dateTime ? (int)$dateTime->format('U') : 0;
+    }
+
+    /**
+     * Applies the formatting using DateTime.
+     *
+     * @param string $input
+     * @param string $inputFormat
+     * @param string $outputFormat
+     * @param DateTimeZone $timezone
+     * @return \DateTime|string
+     */
+    protected function getFormattedDate($input, $inputFormat, $outputFormat, DateTimeZone $timezone)
+    {
+        $formattedDate = DateTime::createFromFormat($inputFormat, $input, $timezone);
+        if ($formattedDate) {
+            return $formattedDate->format($outputFormat);
+        }
+
+        return $input;
+    }
+}