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import zeroFill from '../utils/zero-fill';
import { createDuration } from '../duration/create';
import { addSubtract } from '../moment/add-subtract';
import { isMoment, copyConfig } from '../moment/constructor';
import { addFormatToken } from '../format/format';
import { addRegexToken, matchOffset } from '../parse/regex';
import { addParseToken } from '../parse/token';
import { createLocal } from '../create/local';
import { prepareConfig } from '../create/from-anything';
import { createUTC } from '../create/utc';
import isDate from '../utils/is-date';
import toInt from '../utils/to-int';
import compareArrays from '../utils/compare-arrays';
import { hooks } from '../utils/hooks';
// FORMATTING
function offset (token, separator) {
addFormatToken(token, 0, 0, function () {
var offset = this.utcOffset();
var sign = '+';
if (offset < 0) {
offset = -offset;
sign = '-';
}
return sign + zeroFill(~~(offset / 60), 2) + separator + zeroFill(~~(offset) % 60, 2);
});
}
offset('Z', ':');
offset('ZZ', '');
// PARSING
addRegexToken('Z', matchOffset);
addRegexToken('ZZ', matchOffset);
addParseToken(['Z', 'ZZ'], function (input, array, config) {
config._useUTC = true;
config._tzm = offsetFromString(input);
});
// HELPERS
// timezone chunker
// '+10:00' > ['10', '00']
// '-1530' > ['-15', '30']
var chunkOffset = /([\+\-]|\d\d)/gi;
function offsetFromString(string) {
var matches = ((string || '').match(matchOffset) || []);
var chunk = matches[matches.length - 1] || [];
var parts = (chunk + '').match(chunkOffset) || ['-', 0, 0];
var minutes = +(parts[1] * 60) + toInt(parts[2]);
return parts[0] === '+' ? minutes : -minutes;
}
// Return a moment from input, that is local/utc/zone equivalent to model.
export function cloneWithOffset(input, model) {
var res, diff;
if (model._isUTC) {
res = model.clone();
diff = (isMoment(input) || isDate(input) ? +input : +createLocal(input)) - (+res);
// Use low-level api, because this fn is low-level api.
res._d.setTime(+res._d + diff);
hooks.updateOffset(res, false);
return res;
} else {
return createLocal(input).local();
}
}
function getDateOffset (m) {
// On Firefox.24 Date#getTimezoneOffset returns a floating point.
// https://github.com/moment/moment/pull/1871
return -Math.round(m._d.getTimezoneOffset() / 15) * 15;
}
// HOOKS
// This function will be called whenever a moment is mutated.
// It is intended to keep the offset in sync with the timezone.
hooks.updateOffset = function () {};
// MOMENTS
// keepLocalTime = true means only change the timezone, without
// affecting the local hour. So 5:31:26 +0300 --[utcOffset(2, true)]-->
// 5:31:26 +0200 It is possible that 5:31:26 doesn't exist with offset
// +0200, so we adjust the time as needed, to be valid.
//
// Keeping the time actually adds/subtracts (one hour)
// from the actual represented time. That is why we call updateOffset
// a second time. In case it wants us to change the offset again
// _changeInProgress == true case, then we have to adjust, because
// there is no such time in the given timezone.
export function getSetOffset (input, keepLocalTime) {
var offset = this._offset || 0,
localAdjust;
if (input != null) {
if (typeof input === 'string') {
input = offsetFromString(input);
}
if (Math.abs(input) < 16) {
input = input * 60;
}
if (!this._isUTC && keepLocalTime) {
localAdjust = getDateOffset(this);
}
this._offset = input;
this._isUTC = true;
if (localAdjust != null) {
this.add(localAdjust, 'm');
}
if (offset !== input) {
if (!keepLocalTime || this._changeInProgress) {
addSubtract(this, createDuration(input - offset, 'm'), 1, false);
} else if (!this._changeInProgress) {
this._changeInProgress = true;
hooks.updateOffset(this, true);
this._changeInProgress = null;
}
}
return this;
} else {
return this._isUTC ? offset : getDateOffset(this);
}
}
export function getSetZone (input, keepLocalTime) {
if (input != null) {
if (typeof input !== 'string') {
input = -input;
}
this.utcOffset(input, keepLocalTime);
return this;
} else {
return -this.utcOffset();
}
}
export function setOffsetToUTC (keepLocalTime) {
return this.utcOffset(0, keepLocalTime);
}
export function setOffsetToLocal (keepLocalTime) {
if (this._isUTC) {
this.utcOffset(0, keepLocalTime);
this._isUTC = false;
if (keepLocalTime) {
this.subtract(getDateOffset(this), 'm');
}
}
return this;
}
export function setOffsetToParsedOffset () {
if (this._tzm) {
this.utcOffset(this._tzm);
} else if (typeof this._i === 'string') {
this.utcOffset(offsetFromString(this._i));
}
return this;
}
export function hasAlignedHourOffset (input) {
input = input ? createLocal(input).utcOffset() : 0;
return (this.utcOffset() - input) % 60 === 0;
}
export function isDaylightSavingTime () {
return (
this.utcOffset() > this.clone().month(0).utcOffset() ||
this.utcOffset() > this.clone().month(5).utcOffset()
);
}
export function isDaylightSavingTimeShifted () {
if (typeof this._isDSTShifted !== 'undefined') {
return this._isDSTShifted;
}
var c = {};
copyConfig(c, this);
c = prepareConfig(c);
if (c._a) {
var other = c._isUTC ? createUTC(c._a) : createLocal(c._a);
this._isDSTShifted = this.isValid() &&
compareArrays(c._a, other.toArray()) > 0;
} else {
this._isDSTShifted = false;
}
return this._isDSTShifted;
}
export function isLocal () {
return !this._isUTC;
}
export function isUtcOffset () {
return this._isUTC;
}
export function isUtc () {
return this._isUTC && this._offset === 0;
}
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