add "duration + fixed start time" tracking mode (#859)

src/Timesheet/TrackingMode/DefaultMode.php

@@ -0,0 +1,43 @@
+<?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\Timesheet\TrackingMode;
+
+class DefaultMode extends AbstractTrackingMode
+{
+    public function canEditBegin(): bool
+    {
+        return true;
+    }
+
+    public function canEditEnd(): bool
+    {
+        return true;
+    }
+
+    public function canEditDuration(): bool
+    {
+        return false;
+    }
+
+    public function canUpdateTimesWithAPI(): bool
+    {
+        return true;
+    }
+
+    public function getId(): string
+    {
+        return 'default';
+    }
+
+    public function canSeeBeginAndEndTimes(): bool
+    {
+        return true;
+    }
+}