timestring/dist/lib/timestring.js

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});

var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } };

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var Timestring = (function () {
  function Timestring() {
    var settings = arguments[0] === undefined ? {} : arguments[0];

    _classCallCheck(this, Timestring);

    var DEFAULT_SETTINGS = {
      hoursPerDay: 24,
      daysPerWeek: 7,
      weeksPerMonth: 4,
      monthsPerYear: 12
    };

    // merge default settings with user settings
    this.settings = DEFAULT_SETTINGS;
    for (var s in settings) {
      this.settings[s] = settings[s];
    }

    // time units
    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']
    };

    // time unit seconds mappings
    this.unitValues = {
      s: 1,
      m: 60,
      h: 3600
    };

    // dynamic time unit seconds mappings
    // these are dynamic based on the settings
    this.unitValues.d = this.settings.hoursPerDay * this.unitValues.h;
    this.unitValues.w = this.settings.daysPerWeek * this.unitValues.d;
    this.unitValues.mth = this.settings.weeksPerMonth * this.unitValues.w;
    this.unitValues.y = this.settings.monthsPerYear * this.unitValues.mth;
  }

  _createClass(Timestring, [{
    key: 'parse',
    value: function parse(string) {
      var _this = this;

      var returnUnit = arguments[1] === undefined ? 's' : arguments[1];

      // get unit key helper
      var getUnitKey = function getUnitKey(unit) {
        for (var k in _this.units) {
          for (var u in _this.units[k]) {
            if (unit === _this.units[k][u]) {
              return k;
            }
          }
        }

        // throw error if invalid unit was passed
        throw new Error('The unit [' + unit + '] is not supported by timestring');
      };

      // convert a value to a specific unit
      var convert = function convert(value, unit) {
        var baseValue = _this.unitValues[getUnitKey(unit)];

        return value / baseValue;
      };

      // get a value in seconds based on a specific unit
      var getSeconds = function getSeconds(value, unit) {
        var baseValue = _this.unitValues[getUnitKey(unit)];

        return value * baseValue;
      };

      // seconds counter
      var totalSeconds = 0;

      // split string into groups and get total seconds for each group
      var groups = string.toLowerCase() // convert words to lower case
      .replace(/[^\.\w+-]+/g, '') // remove white space
      .match(/[-+]?[0-9]+[a-z]+/g); // match time groups (digit followed by time unit - i.e 5d 15m = 2 time groups)

      if (groups !== null) {
        for (var group in groups) {
          var g = groups[group];
          var value = g.match(/[0-9]+/g)[0];
          var unit = g.match(/[a-z]+/g)[0];

          totalSeconds += getSeconds(value, unit);
        }
      }

      return convert(totalSeconds, returnUnit);
    }
  }]);

  return Timestring;
})();

exports['default'] = Timestring;

String.prototype.parseTime = function (unit, settings) {
  return new Timestring(settings).parse(this, unit);
};
module.exports = exports['default'];
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