devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/renovation/ui/scheduler/timeZoneCalculator/utils.js)
* Version: 21.2.4
* Build date: Mon Dec 06 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
isDefined
} from "../../../../core/utils/type";
import dateUtils from "../../../../core/utils/date";
import {
PathTimeZoneConversion
} from "./types";
export class TimeZoneCalculator {
constructor(options) {
this.options = options
}
createDate(sourceDate, info) {
var date = new Date(sourceDate);
switch (info.path) {
case PathTimeZoneConversion.fromSourceToAppointment:
return this.getConvertedDate(date, info.appointmentTimeZone, true, false);
case PathTimeZoneConversion.fromAppointmentToSource:
return this.getConvertedDate(date, info.appointmentTimeZone, true, true);
case PathTimeZoneConversion.fromSourceToGrid:
return this.getConvertedDate(date, info.appointmentTimeZone, false, false);
case PathTimeZoneConversion.fromGridToSource:
return this.getConvertedDate(date, info.appointmentTimeZone, false, true);
default:
throw new Error("not specified pathTimeZoneConversion")
}
}
getOffsets(date, appointmentTimezone) {
var clientOffset = -this.getClientOffset(date) / dateUtils.dateToMilliseconds("hour");
var commonOffset = this.getCommonOffset(date);
var appointmentOffset = this.getAppointmentOffset(date, appointmentTimezone);
return {
client: clientOffset,
common: !isDefined(commonOffset) ? clientOffset : commonOffset,
appointment: "number" !== typeof appointmentOffset ? clientOffset : appointmentOffset
}
}
getConvertedDateByOffsets(date, clientOffset, targetOffset, isBack) {
var direction = isBack ? -1 : 1;
var utcDate = date.getTime() - direction * clientOffset * dateUtils.dateToMilliseconds("hour");
return new Date(utcDate + direction * targetOffset * dateUtils.dateToMilliseconds("hour"))
}
getClientOffset(date) {
return this.options.getClientOffset(date)
}
getCommonOffset(date) {
return this.options.getCommonOffset(date)
}
getAppointmentOffset(date, appointmentTimezone) {
return this.options.getAppointmentOffset(date, appointmentTimezone)
}
getConvertedDate(date, appointmentTimezone, useAppointmentTimeZone, isBack) {
var newDate = new Date(date.getTime());
var offsets = this.getOffsets(newDate, appointmentTimezone);
if (useAppointmentTimeZone && !!appointmentTimezone) {
return this.getConvertedDateByOffsets(date, offsets.client, offsets.appointment, isBack)
}
return this.getConvertedDateByOffsets(date, offsets.client, offsets.common, isBack)
}
}