alphascript-server/lib/util/measure.js

CRUD operations for mongo and other functionalities to get started quickly in any CMS project

var converter = require('convert-units');

module.exports = {
  getByType: function (req, res) {
    var results = [];
    switch (req.params.type) {
      case "length":
        results = getLengthUnits();
        break;

      case "volume":
        results = getVolumeUnits();
        break;

      case "mass":
        results = getMassUnits();
        break;

      default:
        results = getLengthUnits().concat(getVolumeUnits()).concat(getMassUnits());
        break;
    }

    res.json(results);
  },
  describeUnit: function (req, res) {
    res.json(describeUnit(req.params.unit));
  },
  convertPossibilities: function (req, res) {
    res.json(getConvertPossibilities(req.params.unit));
  },
  convert: function (req, res) {
    res.json(convert(req.params.value, req.params.from, req.params.to));
  }
};

function getLengthUnits() {
  return converter().possibilities('length');
}

function getVolumeUnits() {
  return converter().possibilities('volume');
}

function getMassUnits() {
  return converter().possibilities('mass');
}

function describeUnit(unit) {
  /*
  {
    abbr: 'kg'
  , measure: 'mass'
  , system: 'metric'
  , singular: 'Kilogram'
  , plural: 'Kilograms'
  }
  */
  return converter().describe(unit);
}

function getConvertPossibilities(unit) {
  return converter().from(unit).possibilities();
}

function convert(value, from, to) {
  return converter(value).from(from).to(to);
}