Relative mode (#1764)

* feat: add group start time to state

* refactor: calculate expected times when offset mode changes

* feat: show relative data in ui

* fixup! feat: add group start time to state

* fixup! refactor: calculate expected times when offset mode changes

* fixup! feat: show relative data in ui

* try to handle multiday

* show planed/expected rundown end day offset values

* refactor: style tweaks to timers

* refactor: cleanup data use

* day offset

* update tests

* test getExpectedStart multiday

* write start epoch to restore file

* current day in relative mode

* remove todo

* move find day offset to utils

---------

Co-authored-by: arc-alex <ac@omnivox.dk>

apps/client/src/features/overview/overview.utils.ts

@@ -3,6 +3,23 @@ import { dayInMs, millisToString } from 'ontime-utils';
 
 import { timerPlaceholder, timerPlaceholderMin } from '../../common/utils/styleUtils';
 
+/**
+ * Composition to stop negative timers from being formatted
+ * They should show a due string instead
+ *
+ * This is used for cases when a negative timer is unwanted
+ * eg: count down to a milestone
+ */
+export function formatDueTime(
+  time: MaybeNumber,
+  segments: number = 3,
+  direction?: TimerType.CountDown | TimerType.CountUp,
+  dueString = 'due',
+): string {
+  if (time !== null && time <= 0) return dueString;
+  return formattedTime(time, segments, direction);
+}
+
 /**
  * Encapsulates the logic for formatting time in overview
  */