/* *******************************************
// Copyright 2010, Anthony Hand
//
// File version date: September 30, 2010
//
// LICENSE INFORMATION
// Licensed under the Apache License, Version 2.0 (the "License"); 
// you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at 
//        http://www.apache.org/licenses/LICENSE-2.0 
// Unless required by applicable law or agreed to in writing, 
// software distributed under the License is distributed on an 
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
// either express or implied. See the License for the specific 
// language governing permissions and limitations under the License. 
//
//
// ABOUT THIS PROJECT
//   Project Owner: Anthony Hand
//   Email: anthony.hand@gmail.com
//   Web Site: http://www.mobileesp.com
//   Source Files: http://code.google.com/p/mobileesp/
//   
//   Versions of this code are available for:
//      PHP, JavaScript, Java, and ASP.NET (C#)
//
//
// WARNING: 
//   These JavaScript-based device detection features may ONLY work 
//   for the newest generation of smartphones, such as the iPhone, 
//   Android and Palm WebOS devices.
//   These device detection features may NOT work for older smartphones 
//   which had poor support for JavaScript, including 
//   older BlackBerry, PalmOS, and Windows Mobile devices. 
//   Additionally, because JavaScript support is extremely poor among 
//   'feature phones', these features may not work at all on such devices.
//   For better results, consider using a server-based version of this code, 
//   such as Java, APS.NET, or PHP.
//
// *******************************************
*/

//Optional: Store values for quickly accessing same info multiple times.
//Stores whether the device is an iPhone or iPod Touch.
var isIphone = false; 
//Stores whether is the iPhone tier of devices.
var isTierIphone = false; 
//Stores whether the device can probably support Rich CSS, but JavaScript support is not assumed. (e.g., newer BlackBerry, Windows Mobile)
var isTierRichCss = false; 
//Stores whether it is another mobile device, which cannot be assumed to support CSS or JS (eg, older BlackBerry, RAZR)
var isTierGenericMobile = false; 

//Initialize some initial string variables we'll look for later.
var engineWebKit = "webkit";
var deviceAndroid = "android";
var deviceIphone = "iphone";
var deviceIpod = "ipod";
var deviceIpad = "ipad";
var deviceMacPpc = "macintosh"; //Used for disambiguation

var deviceNuvifone = "nuvifone"; //Garmin Nuvifone

var deviceSymbian = "symbian";
var deviceS60 = "series60";
var deviceS70 = "series70";
var deviceS80 = "series80";
var deviceS90 = "series90";

var deviceWinPhone7 = "windows phone os 7"; 
var deviceWinMob = "windows ce";
var deviceWindows = "windows";
var deviceIeMob = "iemobile";
var devicePpc = "ppc"; //Stands for PocketPC
var enginePie = "wm5 pie";  //An old Windows Mobile

var deviceBB = "blackberry";
var vndRIM = "vnd.rim"; //Detectable when BB devices emulate IE or Firefox
var deviceBBStorm = "blackberry95"; //Storm 1 and 2
var deviceBBBold = "blackberry97"; //Bold
var deviceBBTour = "blackberry96"; //Tour
var deviceBBCurve = "blackberry89"; //Curve 2
var deviceBBTorch = "blackberry 98"; //Torch

var devicePalm = "palm";
var deviceWebOS = "webos"; //For Palm's new WebOS devices
var engineBlazer = "blazer"; //Old Palm browser
var engineXiino = "xiino";

var deviceKindle = "kindle"; //Amazon Kindle, eInk one.

//Initialize variables for mobile-specific content.
var vndwap = "vnd.wap";
var wml = "wml";

//Initialize variables for random devices and mobile browsers.
//Some of these may not support JavaScript
var deviceBrew = "brew";
var deviceDanger = "danger";
var deviceHiptop = "hiptop";
var devicePlaystation = "playstation";
var deviceNintendoDs = "nitro";
var deviceNintendo = "nintendo";
var deviceWii = "wii";
var deviceXbox = "xbox";
var deviceArchos = "archos";

var engineOpera = "opera"; //Popular browser
var engineNetfront = "netfront"; //Common embedded OS browser
var engineUpBrowser = "up.browser"; //common on some phones
var engineOpenWeb = "openweb"; //Transcoding by OpenWave server
var deviceMidp = "midp"; //a mobile Java technology
var uplink = "up.link";
var engineTelecaQ = 'teleca q'; //a modern feature phone browser

var devicePda = "pda";
var mini = "mini";  //Some mobile browsers put 'mini' in their names.
var mobile = "mobile"; //Some mobile browsers put 'mobile' in their user agent strings.
var mobi = "mobi"; //Some mobile browsers put 'mobi' in their user agent strings.

//Use Maemo, Tablet, and Linux to test for Nokia's Internet Tablets.
var maemo = "maemo";
var maemoTablet = "tablet";
var linux = "linux";
var qtembedded = "qt embedded"; //for Sony Mylo and others
var mylocom2 = "com2"; //for Sony Mylo also

//In some UserAgents, the only clue is the manufacturer.
var manuSonyEricsson = "sonyericsson";
var manuericsson = "ericsson";
var manuSamsung1 = "sec-sgh";
var manuSony = "sony";
var manuHtc = "htc"; //Popular Android and WinMo manufacturer

//In some UserAgents, the only clue is the operator.
var svcDocomo = "docomo";
var svcKddi = "kddi";
var svcVodafone = "vodafone";

//Disambiguation strings.
var disUpdate = "update"; //pda vs. update



//Initialize our user agent string.
var uagent = navigator.userAgent.toLowerCase();


//**************************
// Detects if the current device is an iPhone.
function DetectIphone()
{
   if (uagent.search(deviceIphone) > -1)
   {
      //The iPad and iPod Touch say they're an iPhone! So let's disambiguate.
      if (DetectIpad() ||
          DetectIpod())
         return false;
      else 
         return true;
   }
   else
      return false;
}

//**************************
// Detects if the current device is an iPod Touch.
function DetectIpod()
{
   if (uagent.search(deviceIpod) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current device is an iPad tablet.
function DetectIpad()
{
   if (uagent.search(deviceIpad) > -1  && DetectWebkit())
      return true;
   else
      return false;
}

//**************************
// Detects if the current device is an iPhone or iPod Touch.
function DetectIphoneOrIpod()
{
   //We repeat the searches here because some iPods 
   //  may report themselves as an iPhone, which is ok.
   if (uagent.search(deviceIphone) > -1 ||
       uagent.search(deviceIpod) > -1)
       return true;
    else
       return false;
}

//**************************
// Detects if the current device is an Android OS-based device.
function DetectAndroid()
{
   if (uagent.search(deviceAndroid) > -1)
      return true;
   else
      return false;
}


//**************************
// Detects if the current device is an Android OS-based device and
//   the browser is based on WebKit.
function DetectAndroidWebKit()
{
   if (DetectAndroid() && DetectWebkit())
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is based on WebKit.
function DetectWebkit()
{
   if (uagent.search(engineWebKit) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is the Nokia S60 Open Source Browser.
function DetectS60OssBrowser()
{
   if (DetectWebkit())
   {
     if ((uagent.search(deviceS60) > -1 || 
          uagent.search(deviceSymbian) > -1))
        return true;
     else
        return false;
   }
   else
      return false;
}

//**************************
// Detects if the current device is any Symbian OS-based device,
//   including older S60, Series 70, Series 80, Series 90, and UIQ, 
//   or other browsers running on these devices.
function DetectSymbianOS()
{
   if (uagent.search(deviceSymbian) > -1 ||
       uagent.search(deviceS60) > -1 ||
       uagent.search(deviceS70) > -1 ||
       uagent.search(deviceS80) > -1 ||
       uagent.search(deviceS90) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a 
// Windows Phone 7 device.
function DetectWindowsPhone7()
{
   if (uagent.search(deviceWinPhone7) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a Windows Mobile device.
// Excludes Windows Phone 7 devices. 
// Focuses on Windows Mobile 6.xx and earlier.
function DetectWindowsMobile()
{
   //Exclude new Windows Phone 7.
   if (DetectWindowsPhone7())
      return false;
   //Most devices use 'Windows CE', but some report 'iemobile' 
   //  and some older ones report as 'PIE' for Pocket IE. 
   if (uagent.search(deviceWinMob) > -1 ||
       uagent.search(deviceIeMob) > -1 ||
       uagent.search(enginePie) > -1)
      return true;
   //Test for Windows Mobile PPC but not old Macintosh PowerPC.
   if ((uagent.search(devicePpc) > -1) && 
       !(uagent.search(deviceMacPpc) > -1))
      return true;
   //Test for Windwos Mobile-based HTC devices.
   if (uagent.search(manuHtc) > -1 &&
       uagent.search(deviceWindows) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a BlackBerry of some sort.
function DetectBlackBerry()
{
   if (uagent.search(deviceBB) > -1)
      return true;
   if (uagent.search(vndRIM) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a BlackBerry device AND uses a
//    WebKit-based browser. These are signatures for the new BlackBerry OS 6.
//    Examples: Torch
function DetectBlackBerryWebKit()
{
   if (uagent.search(deviceBB) > -1 &&
       uagent.search(engineWebKit) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a BlackBerry Touch
//    device, such as the Storm or Torch.
function DetectBlackBerryTouch()
{
   if ((uagent.search(deviceBBStorm) > -1) ||
    (uagent.search(deviceBBTorch) > -1))
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a BlackBerry OS 5 device AND
//    has a more capable recent browser. 
//    Examples, Storm, Bold, Tour, Curve2
//    Excludes the new BlackBerry OS 6 browser!!
function DetectBlackBerryHigh()
{
   //Disambiguate for BlackBerry OS 6 (WebKit) browser
   if (DetectBlackBerryWebKit())
      return false;
   if (DetectBlackBerry())
   {
     if (DetectBlackBerryTouch() ||
        uagent.search(deviceBBBold) > -1 || 
        uagent.search(deviceBBTour) > -1 || 
        uagent.search(deviceBBCurve) > -1)
        return true;
     else
        return false;
   }
   else
      return false;
}

//**************************
// Detects if the current browser is a BlackBerry device AND
//    has an older, less capable browser. 
//    Examples: Pearl, 8800, Curve1.
function DetectBlackBerryLow()
{
   if (DetectBlackBerry())
   {
     //Assume that if it's not in the High tier, then it's Low.
     if (DetectBlackBerryHigh())
        return false;
     else
        return true;
   }
   else
      return false;
}


//**************************
// Detects if the current browser is on a PalmOS device.
function DetectPalmOS()
{
   //Most devices nowadays report as 'Palm', 
   //  but some older ones reported as Blazer or Xiino.
   if (uagent.search(devicePalm) > -1 ||
       uagent.search(engineBlazer) > -1 ||
       uagent.search(engineXiino) > -1)
   {
     //Make sure it's not WebOS first
     if (DetectPalmWebOS())
        return false;
     else
        return true;
   }
   else
      return false;
}

//**************************
// Detects if the current browser is on a Palm device
//   running the new WebOS.
function DetectPalmWebOS()
{
   if (uagent.search(deviceWebOS) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a
//   Garmin Nuvifone.
function DetectGarminNuvifone()
{
   if (uagent.search(deviceNuvifone) > -1)
      return true;
   else
      return false;
}


//**************************
// Check to see whether the device is a 'smartphone'.
//   You might wish to send smartphones to a more capable web page
//   than a dumbed down WAP page. 
function DetectSmartphone()
{
   if (DetectIphoneOrIpod())
      return true;
   if (DetectS60OssBrowser())
      return true;
   if (DetectSymbianOS())
      return true;
   if (DetectWindowsMobile())
      return true;
   if (DetectWindowsPhone7())
      return true;
   if (DetectAndroid())
      return true;
   if (DetectBlackBerry())
      return true;
   if (DetectPalmWebOS())
      return true;
   if (DetectPalmOS())
      return true;
   if (DetectGarminNuvifone())
      return true;

   //Otherwise, return false.
   return false;
};

//**************************
// Detects if the current device is an Archos media player/Internet tablet.
function DetectArchos()
{
   if (uagent.search(deviceArchos) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects whether the device is a Brew-powered device.
function DetectBrewDevice()
{
   if (uagent.search(deviceBrew) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects the Danger Hiptop device.
function DetectDangerHiptop()
{
   if (uagent.search(deviceDanger) > -1 ||
       uagent.search(deviceHiptop) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current device is on one of 
// the Maemo-based Nokia Internet Tablets.
function DetectMaemoTablet()
{
   if (uagent.search(maemo) > -1)
      return true;
   //Must be Linux + Tablet, or else it could be something else.
   if (uagent.search(maemoTablet) > -1 &&
       uagent.search(linux) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current browser is a Sony Mylo device.
function DetectSonyMylo()
{
   if (uagent.search(manuSony) > -1)
   {
     if (uagent.search(qtembedded) > -1 ||
         uagent.search(mylocom2) > -1)
        return true;
     else
        return false;
   }
   else
      return false;
}

//**************************
// Detects if the current browser is Opera Mobile or Mini.
function DetectOperaMobile()
{
   if (uagent.search(engineOpera) > -1)
   {
     if (uagent.search(mini) > -1 ||
         uagent.search(mobi) > -1)
        return true;
     else
        return false;
   }
   else
      return false;
}

//**************************
// Detects if the current device is a Sony Playstation.
function DetectSonyPlaystation()
{
   if (uagent.search(devicePlaystation) > -1)
      return true;
   else
      return false;
};

//**************************
// Detects if the current device is a Nintendo game device.
function DetectNintendo()
{
   if (uagent.search(deviceNintendo) > -1   || 
	uagent.search(deviceWii) > -1 ||
	uagent.search(deviceNintendoDs) > -1)
      return true;
   else
      return false;
};

//**************************
// Detects if the current device is a Microsoft Xbox.
function DetectXbox()
{
   if (uagent.search(deviceXbox) > -1)
      return true;
   else
      return false;
};

//**************************
// Detects if the current device is an Internet-capable game console.
function DetectGameConsole()
{
   if (DetectSonyPlaystation())
      return true;
   if (DetectNintendo())
      return true;
   if (DetectXbox())
      return true;
   else
      return false;
};

//**************************
// Detects if the current device is a Kindle.
function DetectKindle()
{
   if (uagent.search(deviceKindle) > -1)
      return true;
   else
      return false;
}

//**************************
// Detects if the current device is a mobile device.
//  This method catches most of the popular modern devices.
//  Excludes Apple iPads.
function DetectMobileQuick()
{
   //Let's say no if it's an iPad, which contains 'mobile' in its user agent.
   if (DetectIpad())
      return false;

   //Most mobile browsing is done on smartphones
   if (DetectSmartphone())
      return true;

   if (uagent.search(deviceMidp) > -1 ||
	DetectBrewDevice())
      return true;

   if (DetectOperaMobile())
      return true;

   if (uagent.search(engineNetfront) > -1)
      return true;
   if (uagent.search(engineUpBrowser) > -1)
      return true;
   if (uagent.search(engineOpenWeb) > -1)
      return true;

   if (DetectDangerHiptop())
      return true;
      
   if (DetectMaemoTablet())
      return true;
   if (DetectArchos())
      return true;

   if ((uagent.search(devicePda) > -1) &&
        (uagent.search(disUpdate) < 0)) //no index found
      return true;
   if (uagent.search(mobile) > -1)
      return true;

   if (DetectKindle())
      return true;
      
   return false;
};


//**************************
// Detects in a more comprehensive way if the current device is a mobile device.
function DetectMobileLong()
{
   if (DetectMobileQuick())
      return true;
   if (DetectGameConsole())
      return true;
   if (DetectSonyMylo())
      return true;

   //Detect for certain very old devices with stupid useragent strings.
   if (uagent.search(manuSamsung1) > -1 ||
	uagent.search(manuSonyEricsson) > -1 || 
	uagent.search(manuericsson) > -1)
      return true;

   if (uagent.search(svcDocomo) > -1)
      return true;
   if (uagent.search(svcKddi) > -1)
      return true;
   if (uagent.search(svcVodafone) > -1)
      return true;


   return false;
};


//*****************************
// For Mobile Web Site Design
//*****************************

//**************************
// The quick way to detect for a tier of devices.
//   This method detects for devices which can 
//   display iPhone-optimized web content.
//   Includes iPhone, iPod Touch, Android, WebOS, etc.
function DetectTierIphone()
{
   if (DetectIphoneOrIpod())
      return true;
   if (DetectAndroid())
      return true;
   if (DetectAndroidWebKit())
      return true;
   if (DetectWindowsPhone7())
      return true;
   if (DetectBlackBerryWebKit())
      return true;
   if (DetectPalmWebOS())
      return true;
   if (DetectGarminNuvifone())
      return true;
   if (DetectMaemoTablet())
      return true;
   else
      return false;
};

//**************************
// The quick way to detect for a tier of devices.
//   This method detects for devices which are likely to be 
//   capable of viewing CSS content optimized for the iPhone, 
//   but may not necessarily support JavaScript.
//   Excludes all iPhone Tier devices.
function DetectTierRichCss()
{
    if (DetectMobileQuick())
    {
       if (DetectTierIphone())
          return false;
          
       //The following devices are explicitly ok.
       if (DetectWebkit())
          return true;
       if (DetectS60OssBrowser())
          return true;

       //Note: 'High' BlackBerry devices ONLY
       if (DetectBlackBerryHigh())
          return true;

       if (DetectWindowsMobile())
          return true;
          
       if (uagent.search(engineTelecaQ) > -1)
          return true;
          
       else
          return false;
    }
    else
      return false;
};

//**************************
// The quick way to detect for a tier of devices.
//   This method detects for all other types of phones,
//   but excludes the iPhone and RichCSS Tier devices.
// NOTE: This method probably won't work due to poor
//  support for JavaScript among other devices. 
function DetectTierOtherPhones()
{
    if (DetectMobileLong())
    {
       //Exclude devices in the other 2 categories
       if (DetectTierIphone())
          return false;
       if (DetectTierRichCss())
          return false;

       //Otherwise, it's a YES
       else
          return true;
    }
    else
      return false;
};