import absFloor from '../utils/abs-floor';
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var abs = Math.abs;
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function sign(x) {
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return (x > 0) - (x < 0) || +x;
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}
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export function toISOString() {
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// for ISO strings we do not use the normal bubbling rules:
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// * milliseconds bubble up until they become hours
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// * days do not bubble at all
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// * months bubble up until they become years
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// This is because there is no context-free conversion between hours and days
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// (think of clock changes)
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// and also not between days and months (28-31 days per month)
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if (!this.isValid()) {
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return this.localeData().invalidDate();
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}
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var seconds = abs(this._milliseconds) / 1000,
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days = abs(this._days),
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months = abs(this._months),
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minutes,
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hours,
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years,
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s,
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total = this.asSeconds(),
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totalSign,
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ymSign,
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daysSign,
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hmsSign;
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if (!total) {
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// this is the same as C#'s (Noda) and python (isodate)...
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// but not other JS (goog.date)
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return 'P0D';
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}
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// 3600 seconds -> 60 minutes -> 1 hour
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minutes = absFloor(seconds / 60);
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hours = absFloor(minutes / 60);
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seconds %= 60;
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minutes %= 60;
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// 12 months -> 1 year
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years = absFloor(months / 12);
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months %= 12;
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// inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
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s = seconds ? seconds.toFixed(3).replace(/\.?0+$/, '') : '';
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totalSign = total < 0 ? '-' : '';
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ymSign = sign(this._months) !== sign(total) ? '-' : '';
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daysSign = sign(this._days) !== sign(total) ? '-' : '';
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hmsSign = sign(this._milliseconds) !== sign(total) ? '-' : '';
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return (
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totalSign +
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'P' +
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(years ? ymSign + years + 'Y' : '') +
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(months ? ymSign + months + 'M' : '') +
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(days ? daysSign + days + 'D' : '') +
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(hours || minutes || seconds ? 'T' : '') +
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(hours ? hmsSign + hours + 'H' : '') +
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(minutes ? hmsSign + minutes + 'M' : '') +
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(seconds ? hmsSign + s + 'S' : '')
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);
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}
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