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