// ==========================================================================
// Project:   SproutCore - JavaScript Application Framework
// Copyright: ©2006-2009 Sprout Systems, Inc. and contributors.
//            Portions ©2008-2009 Apple Inc. All rights reserved.
// License:   Licened under MIT license (see license.js)
// ==========================================================================

/** Detects the current browser type. Borrowed from jQuery + prototype */
SC.browser = (function() {
  
  var userAgent = navigator.userAgent.toLowerCase();
  var version = (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1] ;

  var browser = /** @scope SC.browser */ {
    
    /** The current browser version */
    version: version,
    
    /** non-zero if webkit-based browser */
    safari: (/webkit/).test( userAgent ) ? version : 0,
    
    /** non-zero if this is an opera-based browser */
    opera: (/opera/).test( userAgent ) ? version : 0,
    
    /** non-zero if this is IE */
    msie: (/msie/).test( userAgent ) && !(/opera/).test( userAgent ) ? version : 0,
    
    /** non-zero if this is a miozilla based browser */
    mozilla: (/mozilla/).test( userAgent ) && !(/(compatible|webkit)/).test( userAgent ) ? version : 0,
    
    /** non-zero if this is mobile safari */
    mobileSafari: (/apple.*mobile.*safari/).test(userAgent) ? version : 0,
    
    /** non-zero if we are on windows */
    windows: !!(/(windows)/).test(userAgent),
    
    /** non-zero if we are on a mac */
    mac: !!((/(macintosh)/).test(userAgent) || (/(mac os x)/).test(userAgent)),
    
    language: (navigator.language || navigator.browserLanguage).split('-', 1)[0]
  };
  
  // Add more SC-like descriptions...
  SC.extend(browser, /** @scope SC.browser */ {
    
    isOpera: !!browser.opera,
    isIe: !!browser.msie,
    isIE: !!browser.msie,
    isSafari: !!browser.safari,
    isMobileSafari: !!browser.mobileSafari,
    isMozilla: !!browser.mozilla,
    isWindows: !!browser.windows,
    isMac: !!browser.mac,

    /**
      The current browser name.  This is useful for switch statements. */
    current: browser.msie ? 'msie' : browser.mozilla ? 'mozilla' : browser.safari ? 'safari' : browser.opera ? 'opera' : 'unknown'
    
  }) ;
  
  return browser ;

})();