Fix: time-to-end offset (#1252)

* flip the sign correctly for time-to-end offset

apps/server/src/services/__tests__/timerUtils.test.ts

@@ -997,12 +997,12 @@ describe('getRuntimeOffset()', () => {
     } as RuntimeState;
 
     const offset = getRuntimeOffset(state);
-    expect(offset).toBe(400000); // <--- offset is always the overtime
+    expect(offset).toBe(-400000); // <--- offset is always the overtime
   });
 
   it('handles time-to-end started after the end time', () => {
     const state = {
-      clock: 82000000, // 22:46:40 <--- starting 16 min after the scheduled end
+      clock: 82000000, // 22:46:40 <--- starting 16m 40s after the scheduled end
       eventNow: {
         id: 'd6a2ce',
         timeStart: 77400000, // 21:30:00
@@ -1039,8 +1039,8 @@ describe('getRuntimeOffset()', () => {
     const updateCurrent = getCurrent(state);
     state.timer.current = updateCurrent;
     const offset = getRuntimeOffset(state);
-    expect(millisToString(offset)).toBe('00:16:40');
-    expect(offset).toBe(82000000 - 81000000); // <-- now - planned end
+    expect(millisToString(offset)).toBe('-00:16:40');
+    expect(offset).toBe(81000000 - 82000000); // <-- planned end - now
   });
 });
 

apps/server/src/services/timerUtils.ts

@@ -140,7 +140,7 @@ export function getRuntimeOffset(state: RuntimeState): number {
     return timeStart - clock;
   }
 
-  const overtime = Math.abs(Math.min(current, 0));
+  const overtime = Math.min(current, 0);
   // in time-to-end, offset is overtime
   if (timerType === TimerType.TimeToEnd) {
     return overtime;
@@ -153,7 +153,7 @@ export function getRuntimeOffset(state: RuntimeState): number {
   // addedTime - time added by user (negative offset)
   // pausedTime - time the playback was paused (negative offset)
   // overtime - how long the timer has been over-running (negative offset)
-  return startOffset - addedTime - pausedTime - overtime;
+  return startOffset - addedTime - pausedTime + overtime;
 }
 
 /**