90 lines
2.4 KiB
Plaintext
90 lines
2.4 KiB
Plaintext
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const { getProperties } = Ember;
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/*
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DateWithZoneHelper provides a limited list of helpers
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to manipulate a moment object with timezones
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- add(count unit) adds a COUNT of UNITS to a date
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- subtract(count unit) subtracts a COUNT of UNITS to a date
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- format(format) formats a date with zone in a consitent way, optional moment format
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- isDST() allows to know if a date in a specified timezone is currently under DST
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- datetimeWithZone(timezone) returns a new moment object with timezone applied
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- datetime returns the moment object
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- repetitionsBetweenDates(duration, date) return the number of repertitions of
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duration between two dates, eg for duration: "1.weeks", "2.months"...
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*/
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export default class DateWithZoneHelper {
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constructor(params = {}) {
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this.timezone = params.timezone || "UTC";
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this.localTimezone = params.localTimezone || moment.tz.guess();
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this.datetime = moment.tz(
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getProperties(params, [
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"year",
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"month",
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"day",
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"hour",
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"minute",
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"second"
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]),
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this.timezone
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);
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}
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isDST() {
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return this.datetime.tz(this.localTimezone).isDST();
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}
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repetitionsBetweenDates(duration, date) {
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const [count, unit] = duration.split(".");
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const diff = this.datetime.diff(date, unit);
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const repetitions = diff / parseInt(count, 10);
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return Math.abs((Math.round(repetitions * 10) / 10).toFixed(1));
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}
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add(count, unit) {
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return this._fromDatetime(
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this.datetime.clone().add(count, unit),
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this.timezone,
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this.localTimezone
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);
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}
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subtract(count, unit) {
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return this._fromDatetime(
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this.datetime.clone().subtract(count, unit),
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this.timezone,
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this.localTimezone
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);
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}
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datetimeWithZone(timezone) {
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return this.datetime.clone().tz(timezone);
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}
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format(format) {
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if (format) {
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return this.datetime.tz(this.localTimezone).format(format);
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}
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return this.datetime.tz(this.localTimezone).toISOString(true);
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}
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static fromDatetime(datetime, timezone, localTimezone) {
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return new DateWithZoneHelper({
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year: datetime.year(),
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month: datetime.month(),
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day: datetime.date(),
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hour: datetime.hour(),
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minute: datetime.minute(),
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second: datetime.second(),
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timezone,
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localTimezone
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});
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}
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_fromDatetime(datetime, timezone, localTimezone) {
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return DateWithZoneHelper.fromDatetime(datetime, timezone, localTimezone);
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}
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}
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