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Maurice
60e8f1cd34
useMRoadtrip and useMRtCorridor each kept a nowMinutes helper and their own check whether the selected day is today. Both now use localMinutes and isLocalToday from utils/localDate.ts, which hold the same rules.
30 lines
1.3 KiB
TypeScript
30 lines
1.3 KiB
TypeScript
/**
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* The user's LOCAL calendar date as 'YYYY-MM-DD'.
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*
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* Never derive "today" from `toISOString().split('T')[0]` — that is the UTC
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* date, which disagrees with the wall clock between local midnight and the UTC
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* rollover (for a UTC+2 user, from 00:00 to 02:00 every night). Trip and
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* journey dates are wall-clock dates, so every "is this today/past/upcoming"
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* comparison must use this instead.
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*
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* (Converting a Date you deliberately built in UTC — `new Date(s + 'T00:00:00Z')`
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* round-tripped through date arithmetic — is a different, self-consistent
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* pattern and fine as it is.)
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*/
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export function localIsoDate(d: Date = new Date()): string {
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return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
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}
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/** Minutes since local midnight: the wall clock a day's schedule is read against. */
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export function localMinutes(d: Date = new Date()): number {
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return d.getHours() * 60 + d.getMinutes()
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}
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/**
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* Whether a trip day's date (anything starting 'YYYY-MM-DD') is today on the wall
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* clock. Local for the reason `localIsoDate` gives; a day without a date is never today.
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*/
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export function isLocalToday(date: string | null | undefined): boolean {
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return !!date && date.slice(0, 10) === localIsoDate()
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}
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