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-rw-r--r--library/moment/src/lib/duration/bubble.js61
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diff --git a/library/moment/src/lib/duration/bubble.js b/library/moment/src/lib/duration/bubble.js
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+import absFloor from '../utils/abs-floor';
+import absCeil from '../utils/abs-ceil';
+import { createUTCDate } from '../create/date-from-array';
+
+export function bubble () {
+ var milliseconds = this._milliseconds;
+ var days = this._days;
+ var months = this._months;
+ var data = this._data;
+ var seconds, minutes, hours, years, monthsFromDays;
+
+ // if we have a mix of positive and negative values, bubble down first
+ // check: https://github.com/moment/moment/issues/2166
+ if (!((milliseconds >= 0 && days >= 0 && months >= 0) ||
+ (milliseconds <= 0 && days <= 0 && months <= 0))) {
+ milliseconds += absCeil(monthsToDays(months) + days) * 864e5;
+ days = 0;
+ months = 0;
+ }
+
+ // The following code bubbles up values, see the tests for
+ // examples of what that means.
+ data.milliseconds = milliseconds % 1000;
+
+ seconds = absFloor(milliseconds / 1000);
+ data.seconds = seconds % 60;
+
+ minutes = absFloor(seconds / 60);
+ data.minutes = minutes % 60;
+
+ hours = absFloor(minutes / 60);
+ data.hours = hours % 24;
+
+ days += absFloor(hours / 24);
+
+ // convert days to months
+ monthsFromDays = absFloor(daysToMonths(days));
+ months += monthsFromDays;
+ days -= absCeil(monthsToDays(monthsFromDays));
+
+ // 12 months -> 1 year
+ years = absFloor(months / 12);
+ months %= 12;
+
+ data.days = days;
+ data.months = months;
+ data.years = years;
+
+ return this;
+}
+
+export function daysToMonths (days) {
+ // 400 years have 146097 days (taking into account leap year rules)
+ // 400 years have 12 months === 4800
+ return days * 4800 / 146097;
+}
+
+export function monthsToDays (months) {
+ // the reverse of daysToMonths
+ return months * 146097 / 4800;
+}