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