Improvements todo created and small bugfixes

2026-05-25 12:56:08 +02:00
parent 499f68b9ee
commit 648d376a12
10 changed files with 807 additions and 72 deletions
@@ -22,6 +22,16 @@ export function formatMinutesAfter(minutes: number | null, reference: string = "
  return `${String(hours).padStart(2, "0")}:${String(mins).padStart(2, "0")}`;
 }

+/**
+ * Adjust minutes by the local timezone offset
+ * @param utcMinutes - minutes from UTC midnight
+ * @returns adjusted minutes for local time
+ */
+export function adjustForTimezone(utcMinutes: number): number {
+  const offsetInMinutes = new Date().getTimezoneOffset();
+  return utcMinutes - offsetInMinutes;
+}
+
 /**
 * Convert a Date to datetime-local input value format (local time)
 * @param date - Date object
@@ -111,6 +121,17 @@ export function timeToMinutes(timeStr: string): number {
  return hours * 60 + minutes;
 }

+/**
+ * Get the offset from a reference time in local minutes
+ * @param utcMinutesFromMidnight - minutes from UTC midnight
+ * @param referenceHHMM - reference time as HH:MM string
+ * @returns local offset from reference in minutes
+ */
+export function getLocalOffsetFromReference(utcMinutesFromMidnight: number, referenceHHMM: string): number {
+  const localMinsFromMidnight = adjustForTimezone(utcMinutesFromMidnight);
+  return localMinsFromMidnight - timeToMinutes(referenceHHMM);
+}
+
 /**
 * Convert total minutes to a human-readable string (e.g., "1h 30m" or "45m")
 * @param totalMinutes - Total number of minutes