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Classes/FieldProcessor/TimestampToIsoDate.php

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+<?php
+namespace WapplerSystems\Meilisearch\FieldProcessor;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2009-2015 Ingo Renner <ingo@typo3.org>
+ *  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 WapplerSystems\Meilisearch\System\DateTime\FormatService;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * A field processor that converts timestamps to ISO dates as needed by Solr
+ *
+ * @author Ingo Renner <ingo@typo3.org>
+ */
+class TimestampToIsoDate implements FieldProcessor
+{
+
+    /**
+     * Expects a timestamp and converts it to an ISO 8601 date as needed by Solr.
+     *
+     * Example date output format: 1995-12-31T23:59:59Z
+     * The trailing "Z" designates UTC time and is mandatory
+     *
+     * @param array $values Array of values, an array because of multivalued fields
+     * @return array Modified array of values
+     */
+    public function process(array $values)
+    {
+        $results = [];
+        $formatService = GeneralUtility::makeInstance(FormatService::class);
+
+        foreach ($values as $timestamp) {
+            $results[] = $formatService->timestampToIso($timestamp);
+        }
+
+        return $results;
+    }
+}