@cerebral/useragent/lib/parseUserAgent.js

Adds useragent specs to your cerebral state model

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = parseUserAgent;

var _uaParserJs = require('ua-parser-js');

var _uaParserJs2 = _interopRequireDefault(_uaParserJs);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var uaParser = new _uaParserJs2.default();
uaParser.setUA(navigator.userAgent);

function parseUserAgent(options) {
  var parse = options.parse;

  return Object.keys(parse).filter(isEnabled).reduce(function (all, key) {
    var parseFunction = getParseFunction(key, uaParser);

    if (typeof parseFunction !== 'function') {
      throw new Error('Parsing the ' + key + ' from useragent is not supported.');
    }

    all[key] = parseFunction.call(uaParser);
    return all;
  }, {});

  function isEnabled(key) {
    return parse[key] === true;
  }
}

function getParseFunction(prop, uaParser) {
  var parseFunctionName = getParseFunctionName(prop);
  return uaParser[parseFunctionName];
}

function getParseFunctionName(prop) {
  return 'get' + (prop.charAt(0).toUpperCase() + prop.slice(1));
}
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