Fix timestamp precision handling on PHP 7.3

PHP 7 cannot handle timestame precision with more than six digits as
delivered by Fedora 6.5. This commit truncates the microsecond part
down this limit for `created` and `lastModified` repository properties.

Resolves https://git.slub-dresden.de/kitodo-publication/issues/-/issues/1910

Classes/Domain/Model/Document.php

@@ -16,6 +16,7 @@
 
 use EWW\Dpf\Domain\Workflow\DocumentWorkflow;
 use EWW\Dpf\Services\Api\InternalFormat;
+use EWW\Dpf\Helper\DateTimePrecision;
 use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;
 
 /**
@@ -768,7 +769,7 @@ public function getRemoteLastModDate()
      */
     public function setRemoteLastModDate($remoteLastModDate)
     {
-        $this->remoteLastModDate = $remoteLastModDate;
+        $this->remoteLastModDate = DateTimePrecision::reducePrecision($remoteLastModDate);
     }
 
     /**
@@ -1018,7 +1019,7 @@ public function getCreationDate(): string
      */
     public function setCreationDate(string $creationDate): void
     {
-        $this->creationDate = $creationDate;
+        $this->creationDate = DateTimePrecision::reducePrecision($creationDate);
     }
 
     /**

Classes/Helper/DateTimePrecision.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace EWW\Dpf\Helper;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+class DateTimePrecision
+{
+
+    /**
+     * Reduce microsecond precision to value that can be handled by PHP 7.
+     *
+     * @param String dateTimeString Datetime string
+     * @return String Precision reduced datetime string
+     */
+    public static function reducePrecision(String $dateTimeString)
+    {
+        return preg_replace('/(\.\d{6})\d+Z/', '$1Z', $dateTimeString);
+    }
+}

Tests/Unit/Helper/DateTimePrecisionTest.php

@@ -0,0 +1,46 @@
+<?php
+namespace EWW\Dpf\Tests\Unit\Helper;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use Nimut\TestingFramework\TestCase\UnitTestCase;
+use EWW\Dpf\Helper\DateTimePrecision;
+
+class DateTimePrecisionTest extends UnitTestCase {
+
+    /**
+     * @test
+     */
+    public function Truncates_microseconds_precision_down_to_six_digits() {
+        $datetime = "2024-06-12T08:31:11.570355509Z";
+        $this->assertEquals("2024-06-12T08:31:11.570355Z", DateTimePrecision::reducePrecision($datetime));
+    }
+
+    /**
+     * @test
+     */
+    public function No_truncation_on_six_digit_precision_() {
+        $datetime = "2024-06-12T08:31:11.570355Z";
+        $this->assertEquals("2024-06-12T08:31:11.570355Z", DateTimePrecision::reducePrecision($datetime));
+    }
+
+    /**
+     * @test
+     */
+    public function No_truncation_on_less_than_six_digit_precision_() {
+        $datetime = "2024-06-12T08:31:11.570Z";
+        $this->assertEquals("2024-06-12T08:31:11.570Z", DateTimePrecision::reducePrecision($datetime));
+    }
+
+}