mattlewis92 Angular calendar luxon date adapter

luxon.date-adapter.ts

import { DateAdapter } from 'angular-calendar';
import { DateTime, DateTimeOptions } from 'luxon';

export function getLuxonObject(value: Date | string | number, options?: DateTimeOptions & { format?: string }): DateTime {
  if (value instanceof DateTime) {
    return value;
  }
  let dateTime: DateTime;
  if (value instanceof Date) {
    dateTime = DateTime.fromJSDate(value, options);
  } else if (typeof value === 'number') {
    dateTime = DateTime.fromMillis(value, options);
  } else if (typeof value === 'string') {
    dateTime = DateTime.fromFormat(value, options.format, options);
  }
  if (dateTime && dateTime.isValid) {
    return dateTime;
  }

  return null;
}

export function luxonAdapterFactory(): DateAdapter {
  return {
    addDays(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({days: amount}).toJSDate();
    },

    addHours(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({hours: amount}).toJSDate();
    },

    addMinutes(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({minutes: amount}).toJSDate();
    },

    addMonths(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({months: amount}).toJSDate();
    },

    addSeconds(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({seconds: amount}).toJSDate();
    },

    addWeeks(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).plus({weeks: amount}).toJSDate();
    },

    differenceInDays(dateLeft: Date | string | number, dateRight: Date | string | number): number {
      return getLuxonObject(dateLeft).diff(getLuxonObject(dateRight), 'days').days;
    },

    differenceInMinutes(dateLeft: Date | string | number, dateRight: Date | string | number): number {
      return getLuxonObject(dateLeft).diff(getLuxonObject(dateRight), 'minutes').minutes;
    },

    differenceInSeconds(dateLeft: Date | string | number, dateRight: Date | string | number): number {
      return getLuxonObject(dateLeft).diff(getLuxonObject(dateRight), 'seconds').seconds;
    },

    endOfDay(date: Date | string | number): Date {
      return getLuxonObject(date).endOf('day').toJSDate();
    },

    endOfMonth(date: Date | string | number): Date {
      return getLuxonObject(date).endOf('month').toJSDate();
    },

    endOfWeek(date: Date | string | number, options?: { weekStartsOn?: number }): Date {
      return getLuxonObject(date).endOf('week').toJSDate();
    },

    getDate(date: Date | string | number): number {
      return getLuxonObject(date).day;
    },

    getDay(date: Date | string | number): number {
      const weekday = getLuxonObject(date).weekday;
      return weekday === 7 ? 0 : weekday;
    },

    getHours(date: Date | string | number): number {
      return getLuxonObject(date).hour;
    },

    getISOWeek(date: Date | string | number): number {
      return getLuxonObject(date).weekday;
    },

    getMinutes(date: Date | string | number): number {
      return getLuxonObject(date).minute;
    },

    getMonth(date: Date | string | number): number {
      return getLuxonObject(date).month - 1;
    },

    getYear(date: Date | string | number): number {
      return getLuxonObject(date).year;
    },

    isSameDay(dateLeft: Date | string | number, dateRight: Date | string | number): boolean {
      return getLuxonObject(dateLeft).hasSame(getLuxonObject(dateRight), 'day');
    },

    isSameMonth(dateLeft: Date | string | number, dateRight: Date | string | number): boolean {
      return getLuxonObject(dateLeft).hasSame(getLuxonObject(dateRight), 'month');
    },

    isSameSecond(dateLeft: Date | string | number, dateRight: Date | string | number): boolean {
      return getLuxonObject(dateLeft).hasSame(getLuxonObject(dateRight), 'second');
    },

    max(...dates: Array<Date | string | number>): Date {
      const dateTimes: DateTime[] = dates.map(date => getLuxonObject(date));
      return DateTime.max(...dateTimes).toJSDate();
    },

    setDate(date: Date | string | number, dayOfMonth: number): Date {
      return getLuxonObject(date).set({day: dayOfMonth}).toJSDate();
    },

    setHours(date: Date | string | number, hours: number): Date {
      return getLuxonObject(date).set({hour: hours}).toJSDate();
    },

    setMinutes(date: Date | string | number, minutes: number): Date {
      return getLuxonObject(date).set({minute: minutes}).toJSDate();
    },

    setMonth(date: Date | string | number, month: number): Date {
      return getLuxonObject(date).set({month}).toJSDate();
    },

    setYear(date: Date | string | number, year: number): Date {
      return getLuxonObject(date).set({year}).toJSDate();
    },

    startOfDay(date: Date | string | number): Date {
      return getLuxonObject(date).startOf('day').toJSDate();
    },

    startOfMinute(date: Date | string | number): Date {
      return getLuxonObject(date).startOf('minute').toJSDate();
    },

    startOfMonth(date: Date | string | number): Date {
      return getLuxonObject(date).startOf('month').toJSDate();
    },

    startOfWeek(date: Date | string | number, options?: { weekStartsOn?: number }): Date {
      let weekStartsOn = options && options.weekStartsOn;
      if (isNaN(weekStartsOn)) {
        weekStartsOn = 1;
      }
      if (weekStartsOn === 0) {
        weekStartsOn = 7;
      }
      const dateTime = getLuxonObject(date);
      const weekday = dateTime.weekday;
      if (weekStartsOn === 1) {
        return dateTime.startOf('week').toJSDate();
      }
      if (weekStartsOn <= weekday) {
        return dateTime.startOf('week').plus({day: weekStartsOn - 1}).toJSDate();
      }
      return dateTime.startOf('week').minus({days: 8 - weekStartsOn}).toJSDate();
    },

    subDays(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).minus({days: amount}).toJSDate();
    },

    subMonths(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).minus({months: amount}).toJSDate();
    },

    subWeeks(date: Date | string | number, amount: number): Date {
      return getLuxonObject(date).minus({weeks: amount}).toJSDate();
    }
  };
}