start-end-of.js
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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;
}