Timer modify script

packages/time.yaml

@@ -75,4 +75,26 @@ automation:
           data:
             type: normal
             who: common
-            message: "The timer for the kitchen is finished"
+            message: "The timer for the kitchen is finished"
+
+script:
+  timer_modify:
+    alias: Timer Modify
+    description: For adding/subtracting time from a running timer
+    mode: restart
+    sequence:
+    - service: timer.pause
+      target:
+        entity_id: "{{ timer }}"
+    - delay:
+        seconds: 1
+    - variables:
+        modify: >
+          {% set x = state_attr(timer, 'remaining') ~ '-0000' %}
+          {% set y = strptime(x, '%H:%M:%S%z') %}
+          {{ (as_timestamp(y) + change) | timestamp_custom('%H:%M:%S', false) }}
+    - service: timer.start
+      target:
+        entity_id: "{{ timer }}"
+      data:
+        duration: "{{ modify }}"