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Fix getLocalizedDayJsFromMinutes handling negative minute values

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This commit is contained in:
Gregor Vostrak
2026-03-31 13:56:30 +02:00
parent 53d91b65d6
commit 71c8992e31
1 changed files with 8 additions and 3 deletions
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11
resources/js/packages/ui/src/utils/time.ts
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@@ -149,13 +149,18 @@ export function getLocalizedDayJs(timestamp?: string | null) {
/** /**
* Create a dayjs instance for a specific wall-clock time on a given day. * Create a dayjs instance for a specific wall-clock time on a given day.
* Sets hour/minute directly to avoid DST issues with .add() on transition days. * Sets hour/minute directly to avoid DST issues with .add(minutes) on
* transition days. Negative or overflow values are normalised by shifting
* whole days (`.add(n, 'day')` is DST-safe).
*/ */
export function getLocalizedDayJsFromMinutes(dayStr: string, minutesFromMidnight: number) { export function getLocalizedDayJsFromMinutes(dayStr: string, minutesFromMidnight: number) {
const dayOffset = Math.floor(minutesFromMidnight / (24 * 60));
const remainder = minutesFromMidnight - dayOffset * 24 * 60;
return dayjs return dayjs
.tz(`${dayStr}T00:00:00`, getUserTimezone()) .tz(`${dayStr}T00:00:00`, getUserTimezone())
.hour(Math.floor(minutesFromMidnight / 60)) .add(dayOffset, 'day')
.minute(Math.round(minutesFromMidnight % 60)) .hour(Math.floor(remainder / 60))
.minute(Math.round(remainder % 60))
.second(0); .second(0);
} }