mirror of
https://github.com/musix-org/musix-oss
synced 2024-12-23 19:23:18 +00:00
87 lines
2.7 KiB
JavaScript
87 lines
2.7 KiB
JavaScript
'use strict';
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
/**
|
|
* @description A module for parsing ISO8601 durations
|
|
*/
|
|
|
|
/**
|
|
* The pattern used for parsing ISO8601 duration (PnYnMnDTnHnMnS).
|
|
* This does not cover the week format PnW.
|
|
*/
|
|
|
|
// PnYnMnDTnHnMnS
|
|
var numbers = '\\d+(?:[\\.,]\\d+)?';
|
|
var weekPattern = '(' + numbers + 'W)';
|
|
var datePattern = '(' + numbers + 'Y)?(' + numbers + 'M)?(' + numbers + 'D)?';
|
|
var timePattern = 'T(' + numbers + 'H)?(' + numbers + 'M)?(' + numbers + 'S)?';
|
|
|
|
var iso8601 = 'P(?:' + weekPattern + '|' + datePattern + '(?:' + timePattern + ')?)';
|
|
var objMap = ['weeks', 'years', 'months', 'days', 'hours', 'minutes', 'seconds'];
|
|
|
|
/**
|
|
* The ISO8601 regex for matching / testing durations
|
|
*/
|
|
var pattern = exports.pattern = new RegExp(iso8601);
|
|
|
|
/** Parse PnYnMnDTnHnMnS format to object
|
|
* @param {string} durationString - PnYnMnDTnHnMnS formatted string
|
|
* @return {Object} - With a property for each part of the pattern
|
|
*/
|
|
var parse = exports.parse = function parse(durationString) {
|
|
// Slice away first entry in match-array
|
|
return durationString.match(pattern).slice(1).reduce(function (prev, next, idx) {
|
|
prev[objMap[idx]] = parseFloat(next) || 0;
|
|
return prev;
|
|
}, {});
|
|
};
|
|
|
|
/**
|
|
* Convert ISO8601 duration object to an end Date.
|
|
*
|
|
* @param {Object} duration - The duration object
|
|
* @param {Date} startDate - The starting Date for calculating the duration
|
|
* @return {Date} - The resulting end Date
|
|
*/
|
|
var end = exports.end = function end(duration, startDate) {
|
|
// Create two equal timestamps, add duration to 'then' and return time difference
|
|
var timestamp = startDate ? startDate.getTime() : Date.now();
|
|
var then = new Date(timestamp);
|
|
|
|
then.setFullYear(then.getFullYear() + duration.years);
|
|
then.setMonth(then.getMonth() + duration.months);
|
|
then.setDate(then.getDate() + duration.days);
|
|
then.setHours(then.getHours() + duration.hours);
|
|
then.setMinutes(then.getMinutes() + duration.minutes);
|
|
// Then.setSeconds(then.getSeconds() + duration.seconds);
|
|
then.setMilliseconds(then.getMilliseconds() + duration.seconds * 1000);
|
|
// Special case weeks
|
|
then.setDate(then.getDate() + duration.weeks * 7);
|
|
|
|
return then;
|
|
};
|
|
|
|
/**
|
|
* Convert ISO8601 duration object to seconds
|
|
*
|
|
* @param {Object} duration - The duration object
|
|
* @param {Date} startDate - The starting point for calculating the duration
|
|
* @return {Number}
|
|
*/
|
|
var toSeconds = exports.toSeconds = function toSeconds(duration, startDate) {
|
|
var timestamp = startDate ? startDate.getTime() : Date.now();
|
|
var now = new Date(timestamp);
|
|
var then = end(duration, now);
|
|
|
|
var seconds = (then.getTime() - now.getTime()) / 1000;
|
|
return seconds;
|
|
};
|
|
|
|
exports.default = {
|
|
end: end,
|
|
toSeconds: toSeconds,
|
|
pattern: pattern,
|
|
parse: parse
|
|
}; |