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- /**
- * Helpers.
- */
- var s = 1000;
- var m = s * 60;
- var h = m * 60;
- var d = h * 24;
- var y = d * 365.25;
- /**
- * Parse or format the given `val`.
- *
- * Options:
- *
- * - `long` verbose formatting [false]
- *
- * @param {String|Number} val
- * @param {Object} options
- * @return {String|Number}
- * @api public
- */
- module.exports = function(val, options){
- options = options || {};
- if ('string' == typeof val) return parse(val);
- return options.long
- ? long(val)
- : short(val);
- };
- /**
- * Parse the given `str` and return milliseconds.
- *
- * @param {String} str
- * @return {Number}
- * @api private
- */
- function parse(str) {
- var match = /^((?:\d+)?\.?\d+) *(ms|seconds?|s|minutes?|m|hours?|h|days?|d|years?|y)?$/i.exec(str);
- if (!match) return;
- var n = parseFloat(match[1]);
- var type = (match[2] || 'ms').toLowerCase();
- switch (type) {
- case 'years':
- case 'year':
- case 'y':
- return n * y;
- case 'days':
- case 'day':
- case 'd':
- return n * d;
- case 'hours':
- case 'hour':
- case 'h':
- return n * h;
- case 'minutes':
- case 'minute':
- case 'm':
- return n * m;
- case 'seconds':
- case 'second':
- case 's':
- return n * s;
- case 'ms':
- return n;
- }
- }
- /**
- * Short format for `ms`.
- *
- * @param {Number} ms
- * @return {String}
- * @api private
- */
- function short(ms) {
- if (ms >= d) return Math.round(ms / d) + 'd';
- if (ms >= h) return Math.round(ms / h) + 'h';
- if (ms >= m) return Math.round(ms / m) + 'm';
- if (ms >= s) return Math.round(ms / s) + 's';
- return ms + 'ms';
- }
- /**
- * Long format for `ms`.
- *
- * @param {Number} ms
- * @return {String}
- * @api private
- */
- function long(ms) {
- return plural(ms, d, 'day')
- || plural(ms, h, 'hour')
- || plural(ms, m, 'minute')
- || plural(ms, s, 'second')
- || ms + ' ms';
- }
- /**
- * Pluralization helper.
- */
- function plural(ms, n, name) {
- if (ms < n) return;
- if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
- return Math.ceil(ms / n) + ' ' + name + 's';
- }
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