73 lines
2.8 KiB
TypeScript
73 lines
2.8 KiB
TypeScript
import dayjs, { Dayjs } from "@calcom/dayjs";
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// converts a date to 2022-04-25 for example.
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export const yyyymmdd = (date: Date | Dayjs) =>
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date instanceof Date ? dayjs(date).format("YYYY-MM-DD") : date.format("YYYY-MM-DD");
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// @see: https://github.com/iamkun/dayjs/issues/1272 - for the reason we're not using dayjs to do this.
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export const daysInMonth = (date: Date | Dayjs) => {
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const [year, month] =
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date instanceof Date ? [date.getFullYear(), date.getMonth()] : [date.year(), date.month()];
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// strange JS quirk: new Date(2022, 12, 0).getMonth() = 11
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return new Date(year, month + 1, 0).getDate();
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};
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/**
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* Expects timeFormat to be either 12 or 24, if null or undefined
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* is passed in, we always default back to 24 hour notation.
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*/
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export const formatTime = (
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date: string | Date | Dayjs,
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timeFormat?: number | null,
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timeZone?: string | null
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) => {
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// console.log(timeZone, date);
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return timeZone
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? dayjs(date)
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.tz(timeZone)
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.format(timeFormat === 12 ? "h:mma" : "HH:mm")
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: dayjs(date).format(timeFormat === 12 ? "h:mma" : "HH:mm");
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};
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/**
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* Sorts two timezones by their offset from GMT.
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*/
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export const sortByTimezone = (timezoneA: string, timezoneB: string) => {
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const timezoneAGmtOffset = dayjs.utc().tz(timezoneA).utcOffset();
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const timezoneBGmtOffset = dayjs.utc().tz(timezoneB).utcOffset();
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if (timezoneAGmtOffset === timezoneBGmtOffset) return 0;
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return timezoneAGmtOffset < timezoneBGmtOffset ? -1 : 1;
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};
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/**
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* Verifies given time is a day before in timezoneB.
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*/
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export const isPreviousDayInTimezone = (time: string, timezoneA: string, timezoneB: string) => {
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const timeInTimezoneA = formatTime(time, 24, timezoneA);
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const timeInTimezoneB = formatTime(time, 24, timezoneB);
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if (time === timeInTimezoneB) return false;
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// Eg timeInTimezoneA = 12:00 and timeInTimezoneB = 23:00
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const hoursTimezoneBIsLater = timeInTimezoneB.localeCompare(timeInTimezoneA) === 1;
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// If it is 23:00, does timezoneA come before or after timezoneB in GMT?
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const timezoneBIsEarlierTimezone = sortByTimezone(timezoneA, timezoneB) === 1;
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return hoursTimezoneBIsLater && timezoneBIsEarlierTimezone;
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};
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/**
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* Verifies given time is a day after in timezoneB.
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*/
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export const isNextDayInTimezone = (time: string, timezoneA: string, timezoneB: string) => {
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const timeInTimezoneA = formatTime(time, 24, timezoneA);
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const timeInTimezoneB = formatTime(time, 24, timezoneB);
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if (time === timeInTimezoneB) return false;
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// Eg timeInTimezoneA = 12:00 and timeInTimezoneB = 09:00
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const hoursTimezoneBIsEarlier = timeInTimezoneB.localeCompare(timeInTimezoneA) === -1;
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// If it is 09:00, does timezoneA come before or after timezoneB in GMT?
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const timezoneBIsLaterTimezone = sortByTimezone(timezoneA, timezoneB) === -1;
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return hoursTimezoneBIsEarlier && timezoneBIsLaterTimezone;
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};
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