1 files changed, 113 insertions, 0 deletions
diff --git a/library/moment/src/lib/duration/create.js b/library/moment/src/lib/duration/create.js
new file mode 100644
index 000000000..15f05dead
--- /dev/null
+++ b/library/moment/src/lib/duration/create.js
@@ -0,0 +1,113 @@
+import { Duration, isDuration } from './constructor';
+import toInt from '../utils/to-int';
+import hasOwnProp from '../utils/has-own-prop';
+import { DATE, HOUR, MINUTE, SECOND, MILLISECOND } from '../units/constants';
+import { cloneWithOffset } from '../units/offset';
+import { createLocal } from '../create/local';
+
+// ASP.NET json date format regex
+var aspNetRegex = /(\-)?(?:(\d*)\.)?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/;
+
+// from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
+// somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
+var isoRegex = /^(-)?P(?:(?:([0-9,.]*)Y)?(?:([0-9,.]*)M)?(?:([0-9,.]*)D)?(?:T(?:([0-9,.]*)H)?(?:([0-9,.]*)M)?(?:([0-9,.]*)S)?)?|([0-9,.]*)W)$/;
+
+export function createDuration (input, key) {
+    var duration = input,
+        // matching against regexp is expensive, do it on demand
+        match = null,
+        sign,
+        ret,
+        diffRes;
+
+    if (isDuration(input)) {
+        duration = {
+            ms : input._milliseconds,
+            d  : input._days,
+            M  : input._months
+        };
+    } else if (typeof input === 'number') {
+        duration = {};
+        if (key) {
+            duration[key] = input;
+        } else {
+            duration.milliseconds = input;
+        }
+    } else if (!!(match = aspNetRegex.exec(input))) {
+        sign = (match[1] === '-') ? -1 : 1;
+        duration = {
+            y  : 0,
+            d  : toInt(match[DATE])        * sign,
+            h  : toInt(match[HOUR])        * sign,
+            m  : toInt(match[MINUTE])      * sign,
+            s  : toInt(match[SECOND])      * sign,
+            ms : toInt(match[MILLISECOND]) * sign
+        };
+    } else if (!!(match = isoRegex.exec(input))) {
+        sign = (match[1] === '-') ? -1 : 1;
+        duration = {
+            y : parseIso(match[2], sign),
+            M : parseIso(match[3], sign),
+            d : parseIso(match[4], sign),
+            h : parseIso(match[5], sign),
+            m : parseIso(match[6], sign),
+            s : parseIso(match[7], sign),
+            w : parseIso(match[8], sign)
+        };
+    } else if (duration == null) {// checks for null or undefined
+        duration = {};
+    } else if (typeof duration === 'object' && ('from' in duration || 'to' in duration)) {
+        diffRes = momentsDifference(createLocal(duration.from), createLocal(duration.to));
+
+        duration = {};
+        duration.ms = diffRes.milliseconds;
+        duration.M = diffRes.months;
+    }
+
+    ret = new Duration(duration);
+
+    if (isDuration(input) && hasOwnProp(input, '_locale')) {
+        ret._locale = input._locale;
+    }
+
+    return ret;
+}
+
+createDuration.fn = Duration.prototype;
+
+function parseIso (inp, sign) {
+    // We'd normally use ~~inp for this, but unfortunately it also
+    // converts floats to ints.
+    // inp may be undefined, so careful calling replace on it.
+    var res = inp && parseFloat(inp.replace(',', '.'));
+    // apply sign while we're at it
+    return (isNaN(res) ? 0 : res) * sign;
+}
+
+function positiveMomentsDifference(base, other) {
+    var res = {milliseconds: 0, months: 0};
+
+    res.months = other.month() - base.month() +
+        (other.year() - base.year()) * 12;
+    if (base.clone().add(res.months, 'M').isAfter(other)) {
+        --res.months;
+    }
+
+    res.milliseconds = +other - +(base.clone().add(res.months, 'M'));
+
+    return res;
+}
+
+function momentsDifference(base, other) {
+    var res;
+    other = cloneWithOffset(other, base);
+    if (base.isBefore(other)) {
+        res = positiveMomentsDifference(base, other);
+    } else {
+        res = positiveMomentsDifference(other, base);
+        res.milliseconds = -res.milliseconds;
+        res.months = -res.months;
+    }
+
+    return res;
+}