Prevent bookings with same start / stop time (#3304)

src/Validator/Constraints/TimesheetZeroDuration.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Validator\Constraints;
+
+final class TimesheetZeroDuration extends TimesheetConstraint
+{
+    public const ZERO_DURATION_ERROR = 'kimai-timesheet-zero-duration-01';
+
+    protected static $errorNames = [
+        self::ZERO_DURATION_ERROR => 'Duration cannot be zero.',
+    ];
+
+    public $message = 'Duration cannot be zero.';
+
+    public function getTargets()
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}