1 files changed, 213 insertions, 0 deletions
diff --git a/library/moment/src/lib/units/offset.js b/library/moment/src/lib/units/offset.js
new file mode 100644
index 000000000..33288c0bf
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+++ b/library/moment/src/lib/units/offset.js
@@ -0,0 +1,213 @@
+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;
+}