added punch-in punch-out / time-clock mode (#812)

src/Twig/TimesheetConfigExtension.php

@@ -32,6 +32,7 @@ class TimesheetConfigExtension extends AbstractExtension
     {
         return [
             new TwigFunction('is_duration_only', [$this, 'isDurationOnly']),
+            new TwigFunction('is_punch_mode', [$this, 'isPunchInOut']),
         ];
     }
 
@@ -39,4 +40,9 @@ class TimesheetConfigExtension extends AbstractExtension
     {
         return $this->configuration->isDurationOnly();
     }
+
+    public function isPunchInOut(): bool
+    {
+        return $this->configuration->isPunchInOut();
+    }
 }