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- import { normalizeUnits } from '../units/aliases';
- import { hooks } from '../utils/hooks';
- var MS_PER_SECOND = 1000,
- MS_PER_MINUTE = 60 * MS_PER_SECOND,
- MS_PER_HOUR = 60 * MS_PER_MINUTE,
- MS_PER_400_YEARS = (365 * 400 + 97) * 24 * MS_PER_HOUR;
- // actual modulo - handles negative numbers (for dates before 1970):
- function mod(dividend, divisor) {
- return ((dividend % divisor) + divisor) % divisor;
- }
- function localStartOfDate(y, m, d) {
- // the date constructor remaps years 0-99 to 1900-1999
- if (y < 100 && y >= 0) {
- // preserve leap years using a full 400 year cycle, then reset
- return new Date(y + 400, m, d) - MS_PER_400_YEARS;
- } else {
- return new Date(y, m, d).valueOf();
- }
- }
- function utcStartOfDate(y, m, d) {
- // Date.UTC remaps years 0-99 to 1900-1999
- if (y < 100 && y >= 0) {
- // preserve leap years using a full 400 year cycle, then reset
- return Date.UTC(y + 400, m, d) - MS_PER_400_YEARS;
- } else {
- return Date.UTC(y, m, d);
- }
- }
- export function startOf(units) {
- var time, startOfDate;
- units = normalizeUnits(units);
- if (units === undefined || units === 'millisecond' || !this.isValid()) {
- return this;
- }
- startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;
- switch (units) {
- case 'year':
- time = startOfDate(this.year(), 0, 1);
- break;
- case 'quarter':
- time = startOfDate(
- this.year(),
- this.month() - (this.month() % 3),
- 1
- );
- break;
- case 'month':
- time = startOfDate(this.year(), this.month(), 1);
- break;
- case 'week':
- time = startOfDate(
- this.year(),
- this.month(),
- this.date() - this.weekday()
- );
- break;
- case 'isoWeek':
- time = startOfDate(
- this.year(),
- this.month(),
- this.date() - (this.isoWeekday() - 1)
- );
- break;
- case 'day':
- case 'date':
- time = startOfDate(this.year(), this.month(), this.date());
- break;
- case 'hour':
- time = this._d.valueOf();
- time -= mod(
- time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
- MS_PER_HOUR
- );
- break;
- case 'minute':
- time = this._d.valueOf();
- time -= mod(time, MS_PER_MINUTE);
- break;
- case 'second':
- time = this._d.valueOf();
- time -= mod(time, MS_PER_SECOND);
- break;
- }
- this._d.setTime(time);
- hooks.updateOffset(this, true);
- return this;
- }
- export function endOf(units) {
- var time, startOfDate;
- units = normalizeUnits(units);
- if (units === undefined || units === 'millisecond' || !this.isValid()) {
- return this;
- }
- startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;
- switch (units) {
- case 'year':
- time = startOfDate(this.year() + 1, 0, 1) - 1;
- break;
- case 'quarter':
- time =
- startOfDate(
- this.year(),
- this.month() - (this.month() % 3) + 3,
- 1
- ) - 1;
- break;
- case 'month':
- time = startOfDate(this.year(), this.month() + 1, 1) - 1;
- break;
- case 'week':
- time =
- startOfDate(
- this.year(),
- this.month(),
- this.date() - this.weekday() + 7
- ) - 1;
- break;
- case 'isoWeek':
- time =
- startOfDate(
- this.year(),
- this.month(),
- this.date() - (this.isoWeekday() - 1) + 7
- ) - 1;
- break;
- case 'day':
- case 'date':
- time = startOfDate(this.year(), this.month(), this.date() + 1) - 1;
- break;
- case 'hour':
- time = this._d.valueOf();
- time +=
- MS_PER_HOUR -
- mod(
- time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
- MS_PER_HOUR
- ) -
- 1;
- break;
- case 'minute':
- time = this._d.valueOf();
- time += MS_PER_MINUTE - mod(time, MS_PER_MINUTE) - 1;
- break;
- case 'second':
- time = this._d.valueOf();
- time += MS_PER_SECOND - mod(time, MS_PER_SECOND) - 1;
- break;
- }
- this._d.setTime(time);
- hooks.updateOffset(this, true);
- return this;
- }
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