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Michael Barrett
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Jan 15, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,100 +1,142 @@ | ||
| var _ = require('lodash'); | ||
|
|
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| /** | ||
| * Exports | ||
| */ | ||
|
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| module.exports = Timestring; | ||
| module.exports = parseTimestring; | ||
|
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| /** | ||
| * Create a new Timestring instance | ||
| * Default options to use when parsing a timestring | ||
| * | ||
| * @param {Object} opts | ||
| * @constructor | ||
| * @type {Object} | ||
| */ | ||
|
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| function Timestring(opts) { | ||
| var defaultOpts = { | ||
| hoursPerDay: 24, | ||
| daysPerWeek: 7, | ||
| weeksPerMonth: 4, | ||
| monthsPerYear: 12, | ||
| }; | ||
| var defaultOpts = { | ||
| hoursPerDay: 24, | ||
| daysPerWeek: 7, | ||
| weeksPerMonth: 4, | ||
| monthsPerYear: 12, | ||
| }; | ||
|
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| opts = opts || {}; | ||
| this.opts = defaultOpts; | ||
| for (var s in opts) { this.opts[s] = opts[s]; } | ||
|
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| this.units = { | ||
| s: ['s', 'sec', 'secs', 'second', 'seconds'], | ||
| m: ['m', 'min', 'mins', 'minute', 'minutes'], | ||
| h: ['h', 'hr', 'hrs', 'hour', 'hours'], | ||
| d: ['d', 'day', 'days'], | ||
| w: ['w', 'week', 'weeks'], | ||
| mth: ['mth', 'mths','month', 'months'], | ||
| y: ['y', 'yr', 'yrs', 'year', 'years'], | ||
| }; | ||
| /** | ||
| * Map of accepted strings to unit | ||
| * | ||
| * @type {Object} | ||
| */ | ||
|
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| var unitMap = { | ||
| s: ['s', 'sec', 'secs', 'second', 'seconds'], | ||
| m: ['m', 'min', 'mins', 'minute', 'minutes'], | ||
| h: ['h', 'hr', 'hrs', 'hour', 'hours'], | ||
| d: ['d', 'day', 'days'], | ||
| w: ['w', 'week', 'weeks'], | ||
| mth: ['mth', 'mths','month', 'months'], | ||
| y: ['y', 'yr', 'yrs', 'year', 'years'], | ||
| }; | ||
|
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| /** | ||
| * Parse a timestring | ||
| * | ||
| * @param {string} string | ||
| * @param {string} [returnUnit] | ||
| * @param {Object} [opts] | ||
| * @return {number} | ||
| */ | ||
|
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| function parseTimestring(string, returnUnit, opts) { | ||
| opts = _.extend(_.clone(defaultOpts), opts || {}); | ||
|
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| var totalSeconds = 0; | ||
| var unitValues = getUnitValues(opts); | ||
| var groups = string | ||
| .toLowerCase() | ||
| .replace(/[^\.\w+-]+/g, '') | ||
| .match(/[-+]?[0-9]+[a-z]+/g); | ||
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| if (groups !== null) { | ||
| _.each(groups, function(group) { | ||
| var value = group.match(/[0-9]+/g)[0]; | ||
| var unit = group.match(/[a-z]+/g)[0]; | ||
|
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| totalSeconds += getSeconds(value, unit, unitValues); | ||
| }); | ||
| } | ||
|
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| if (returnUnit) { | ||
| return convert(totalSeconds, returnUnit, unitValues); | ||
| } | ||
|
|
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| return totalSeconds; | ||
| } | ||
|
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| this.unitValues = { | ||
| /** | ||
| * Get unit values based on the passed options | ||
| * | ||
| * @param {Object} opts | ||
| * @returns {Object} | ||
| */ | ||
|
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| function getUnitValues(opts) { | ||
| var unitValues = { | ||
| s: 1, | ||
| m: 60, | ||
| h: 3600, | ||
| }; | ||
|
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| this.unitValues.d = this.opts.hoursPerDay * this.unitValues.h; | ||
| this.unitValues.w = this.opts.daysPerWeek * this.unitValues.d; | ||
| this.unitValues.mth = this.opts.weeksPerMonth * this.unitValues.w; | ||
| this.unitValues.y = this.opts.monthsPerYear * this.unitValues.mth; | ||
| unitValues.d = opts.hoursPerDay * unitValues.h; | ||
| unitValues.w = opts.daysPerWeek * unitValues.d; | ||
| unitValues.mth = opts.weeksPerMonth * unitValues.w; | ||
| unitValues.y = opts.monthsPerYear * unitValues.mth; | ||
|
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| return unitValues; | ||
| } | ||
|
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| /** | ||
| * Parse a timestring | ||
| * Get the key for a unit | ||
| * | ||
| * @param {string} string | ||
| * @param {string} returnUnit | ||
| * @return {string} | ||
| * @param {string} unit | ||
| * @returns {string} | ||
| */ | ||
|
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| Timestring.prototype.parse = function parse(string, returnUnit) { | ||
| function getUnitKey(unit) { | ||
| for (var k in this.units) { | ||
| for (var u in this.units[k]) { | ||
| if (unit === this.units[k][u]) { | ||
| return k; | ||
| } | ||
| function getUnitKey(unit) { | ||
| for (var k in unitMap) { | ||
| for (var u in unitMap[k]) { | ||
| if (unit === unitMap[k][u]) { | ||
| return k; | ||
| } | ||
| } | ||
|
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| throw new Error('The unit [' + unit + '] is not supported by timestring'); | ||
| } | ||
|
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| function convert(value, unit) { | ||
| var baseValue = this.unitValues[getUnitKey.call(this, unit)]; | ||
|
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| return value / baseValue; | ||
| } | ||
| throw new Error('The unit [' + unit + '] is not supported by timestring'); | ||
| } | ||
|
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| function getSeconds(value, unit) { | ||
| var baseValue = this.unitValues[getUnitKey.call(this, unit)]; | ||
| /** | ||
| * Get the number of seconds for a value, based on the unit | ||
| * | ||
| * @param {number} value | ||
| * @param {string} unit | ||
| * @param {Object} unitValues | ||
| * @returns {number} | ||
| */ | ||
|
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| return value * baseValue; | ||
| } | ||
| function getSeconds(value, unit, unitValues) { | ||
| var baseValue = unitValues[getUnitKey(unit)]; | ||
|
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| var totalSeconds = 0; | ||
| var groups = string | ||
| .toLowerCase() | ||
| .replace(/[^\.\w+-]+/g, '') | ||
| .match(/[-+]?[0-9]+[a-z]+/g); | ||
| return value * baseValue; | ||
| } | ||
|
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| if (groups !== null) { | ||
| for (var i = 0; i < groups.length; i++) { | ||
| var g = groups[i]; | ||
| var value = g.match(/[0-9]+/g)[0]; | ||
| var unit = g.match(/[a-z]+/g)[0]; | ||
| /** | ||
| * Convert a value from its existing unit to a new unit | ||
| * | ||
| * @param {number} value | ||
| * @param {string} unit | ||
| * @param {Object} unitValues | ||
| * @returns {number} | ||
| */ | ||
|
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| totalSeconds += getSeconds.call(this, value, unit); | ||
| } | ||
| } | ||
| function convert(value, unit, unitValues) { | ||
| var baseValue = unitValues[getUnitKey(unit)]; | ||
|
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| return (returnUnit) ? | ||
| convert.call(this, totalSeconds, returnUnit) : | ||
| totalSeconds; | ||
| }; | ||
| return value / baseValue; | ||
| } |
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