mirror of
https://github.com/musix-org/musix-oss
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87 lines
2.7 KiB
JavaScript
87 lines
2.7 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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/**
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* @description A module for parsing ISO8601 durations
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*/
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/**
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* The pattern used for parsing ISO8601 duration (PnYnMnDTnHnMnS).
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* This does not cover the week format PnW.
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*/
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// PnYnMnDTnHnMnS
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var numbers = '\\d+(?:[\\.,]\\d+)?';
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var weekPattern = '(' + numbers + 'W)';
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var datePattern = '(' + numbers + 'Y)?(' + numbers + 'M)?(' + numbers + 'D)?';
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var timePattern = 'T(' + numbers + 'H)?(' + numbers + 'M)?(' + numbers + 'S)?';
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var iso8601 = 'P(?:' + weekPattern + '|' + datePattern + '(?:' + timePattern + ')?)';
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var objMap = ['weeks', 'years', 'months', 'days', 'hours', 'minutes', 'seconds'];
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/**
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* The ISO8601 regex for matching / testing durations
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*/
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var pattern = exports.pattern = new RegExp(iso8601);
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/** Parse PnYnMnDTnHnMnS format to object
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* @param {string} durationString - PnYnMnDTnHnMnS formatted string
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* @return {Object} - With a property for each part of the pattern
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*/
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var parse = exports.parse = function parse(durationString) {
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// Slice away first entry in match-array
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return durationString.match(pattern).slice(1).reduce(function (prev, next, idx) {
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prev[objMap[idx]] = parseFloat(next) || 0;
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return prev;
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}, {});
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};
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/**
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* Convert ISO8601 duration object to an end Date.
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*
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* @param {Object} duration - The duration object
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* @param {Date} startDate - The starting Date for calculating the duration
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* @return {Date} - The resulting end Date
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*/
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var end = exports.end = function end(duration, startDate) {
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// Create two equal timestamps, add duration to 'then' and return time difference
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var timestamp = startDate ? startDate.getTime() : Date.now();
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var then = new Date(timestamp);
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then.setFullYear(then.getFullYear() + duration.years);
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then.setMonth(then.getMonth() + duration.months);
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then.setDate(then.getDate() + duration.days);
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then.setHours(then.getHours() + duration.hours);
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then.setMinutes(then.getMinutes() + duration.minutes);
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// Then.setSeconds(then.getSeconds() + duration.seconds);
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then.setMilliseconds(then.getMilliseconds() + duration.seconds * 1000);
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// Special case weeks
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then.setDate(then.getDate() + duration.weeks * 7);
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return then;
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};
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/**
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* Convert ISO8601 duration object to seconds
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*
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* @param {Object} duration - The duration object
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* @param {Date} startDate - The starting point for calculating the duration
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* @return {Number}
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*/
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var toSeconds = exports.toSeconds = function toSeconds(duration, startDate) {
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var timestamp = startDate ? startDate.getTime() : Date.now();
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var now = new Date(timestamp);
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var then = end(duration, now);
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var seconds = (then.getTime() - now.getTime()) / 1000;
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return seconds;
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};
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exports.default = {
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end: end,
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toSeconds: toSeconds,
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pattern: pattern,
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parse: parse
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}; |