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get-multi-calendars.ts
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get-multi-calendars.ts
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import { calendar } from 'nodemod/dist/calendar/calendar.js';
import { DateTimeFormatter, WeekNumberType } from 'nodemod/dist/calendar/calendar_typing.js';
import { getWeekdays } from 'nodemod/dist/calendar/get-weekdays.js';
import { toUTCDate } from 'nodemod/dist/calendar/to-utc-date.js';
type MultiCalendar = ReturnType<typeof calendar>;
interface MultiCalendars extends NonNullable<Omit<MultiCalendar, 'calendar' | 'key'>> {
key: string;
weekdays: ReturnType<typeof getWeekdays>;
calendars: Pick<ReturnType<typeof calendar>, 'calendar' | 'key'>[];
}
interface GetMultiCalendarsOption {
dayFormat: DateTimeFormatter;
fullDateFormat: DateTimeFormatter;
locale: string;
longWeekdayFormat: DateTimeFormatter;
narrowWeekdayFormat: DateTimeFormatter;
selectedDate: Date;
disabledDates?: Date[];
disabledDays?: number[];
firstDayOfWeek?: number;
max?: Date;
min?: Date;
showWeekNumber?: boolean;
weekLabel?: string;
weekNumberType?: WeekNumberType;
}
export function getMultiCalendars(
options: GetMultiCalendarsOption
): MultiCalendars {
const {
dayFormat,
fullDateFormat,
locale,
longWeekdayFormat,
narrowWeekdayFormat,
selectedDate,
disabledDates,
disabledDays,
firstDayOfWeek,
max,
min,
showWeekNumber,
weekLabel,
weekNumberType,
} = options;
const minTime = min == null ? Number.MIN_SAFE_INTEGER : +min;
const maxTime = max == null ? Number.MAX_SAFE_INTEGER : +max;
const weekdays = getWeekdays({
longWeekdayFormat,
narrowWeekdayFormat,
firstDayOfWeek,
showWeekNumber,
weekLabel,
});
const getKey = (date: Date) => [
locale,
date.toJSON(),
disabledDates?.join('_'),
disabledDays?.join('_'),
firstDayOfWeek,
max?.toJSON(),
min?.toJSON(),
showWeekNumber,
weekLabel,
weekNumberType,
].filter(Boolean).join(':');
const ify = selectedDate.getUTCFullYear();
const im = selectedDate.getUTCMonth();
const calendarsList = [-1, 0, 1].map<MultiCalendar>((n) => {
const firstDayOfMonth = toUTCDate(ify, im + n, 1);
const lastDayOfMonthTime = +toUTCDate(ify, im + n + 1, 0);
const key = getKey(firstDayOfMonth);
/**
* NOTE: Return `null` when one of the followings fulfills:-
*
* minTime maxTime
* |--------|--------o--------|--------|
* last day | valid dates | first day
*
* - last day of the month < `minTime` - entire month should be disabled
* - first day of the month > `maxTime` - entire month should be disabled
*/
if (lastDayOfMonthTime < minTime || +firstDayOfMonth > maxTime) {
return {
key,
calendar: null,
disabledDatesSet: null,
disabledDaysSet: null,
};
}
const calendarDays = calendar({
dayFormat,
fullDateFormat,
locale,
disabledDates,
disabledDays,
firstDayOfWeek,
max,
min,
showWeekNumber,
weekLabel,
weekNumberType,
selectedDate: firstDayOfMonth,
});
return { ...calendarDays, key };
});
const multiCalendars = calendarsList.reduce<MultiCalendars>((p, n) => {
const {
disabledDatesSet,
disabledDaysSet,
...rest
} = n;
if (null != rest.calendar) {
if (disabledDaysSet) {
for (const o of disabledDaysSet) p.disabledDaysSet?.add(o);
}
if (disabledDatesSet) {
for (const o of disabledDatesSet) p.disabledDatesSet?.add(o);
}
}
p.calendars.push(rest);
return p;
}, {
weekdays,
key: getKey(selectedDate),
calendars: [],
disabledDatesSet: new Set(),
disabledDaysSet: new Set(),
});
return multiCalendars;
}