uaParser.js

/*jshint node:true*/

function parse(uaStr) {
  var agent = {
    platform: {}
  , browser: {}
  , engine: {}
  }

  var ua = uaStr
    , p = agent.platform
    , b = agent.browser
    , e = agent.engine

  // detect platform
  if (/Windows/.test(ua)) {
    p.name = 'win'
    p.win = true
  } else if (/Mac/.test(ua)) {
    p.name = 'mac'
    p.mac = true
  } else if (/Linux/.test(ua)) {
    p.name = 'linux'
    p.linux = true
  } else if (/iPhone|iPod/.test(ua)) {
    p.name = 'iphone'
    p.iphone = true
  } else if (/iPad/.test(ua)) {
    p.name = 'ipad'
    p.ipad = true
  } else if (/Android/.test(ua)) {
    p.name = 'android'
    p.android = true
  } else {
    p.name = 'other'
    p.unknown = true
  }

  // detect browser
  if (/MSIE/.test(ua)) {
    b.name = 'msie'
    b.msie = true
  } else if (/Firefox/.test(ua)) {
    b.name = 'firefox'
    b.firefox = true
  } else if (/Chrome/.test(ua)) { // must be tested before Safari
    b.name = 'chrome'
    b.chrome = true
  } else if (/Safari/.test(ua)) {
    b.name = 'safari'
    b.safari = true
  } else if (/Opera/.test(ua)) {
    b.name = 'opera'
    b.opera = true
  } else {
    b.name = 'other'
    b.unknown = true
  }

  // detect browser version
  if (b.msie) {
    b.version = /MSIE (\d+(\.\d+)*)/.exec(ua)[1]
  } else if (b.firefox) {
    b.version = /Firefox\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else if (b.chrome) {
    b.version = /Chrome\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else if (b.safari) {
    b.version = /Version\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else if (b.opera) {
    b.version = /Version\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else {
    b.version = 0
  }

  // detect engine
  if (/Trident/.test(ua) || b.msie) {
    e.name = 'trident'
    e.trident = true
  } else if (/WebKit/.test(ua)) { // must be tested before Gecko
    e.name = 'webkit'
    e.webkit = true
  } else if (/Gecko/.test(ua)) {
    e.name = 'gecko'
    e.gecko = true
  } else if (/Presto/.test(ua)) {
    e.name = 'presto'
    e.presto = true
  } else {
    e.name = 'other'
    e.unknown = true
  }

  // detect engine version
  if (e.trident) {
    e.version = /Trident/.test(ua)? /Trident\/(\d+(\.\d+)*)/.exec(ua)[1]: 0
  } else if (e.gecko) {
    e.version = /rv:(\d+(\.\d+)*)/.exec(ua)[1]
  } else if (e.webkit) {
    e.version = /WebKit\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else if (e.presto) {
    e.version = /Presto\/(\d+(\.\d+)*)/.exec(ua)[1]
  } else {
    e.version = 0
  }

  return agent
}

exports.parse = parse