/*
Copyright (c) Copyright (c) 2007, Carl S. Yestrau All rights reserved.
Code licensed under the BSD License: http://www.featureblend.com/license.txt
Version: 1.0.4
*/
var FlashDetect = new function(){
	var self = this;
	self.installed = false;
	self.raw = "";
	self.major = -1;
	self.minor = -1;
	self.revision = -1;
	self.revisionStr = "";
	var activeXDetectRules = [
		{
			"name":"ShockwaveFlash.ShockwaveFlash.7",
			"version":function(obj){
				return getActiveXVersion(obj);
			}
		},
		{
			"name":"ShockwaveFlash.ShockwaveFlash.6",
			"version":function(obj){
				var version = "6,0,21";
				try{
					obj.AllowScriptAccess = "always";
					version = getActiveXVersion(obj);
				}catch(err){}
				return version;
			}
		},
		{
			"name":"ShockwaveFlash.ShockwaveFlash",
			"version":function(obj){
				return getActiveXVersion(obj);
			}
		}
	];
	/**
	 * Extract the ActiveX version of the plugin.
	 * 
	 * @param {Object} The flash ActiveX object.
	 * @type String
	 */
	var getActiveXVersion = function(activeXObj){
		var version = -1;
		try{
			version = activeXObj.GetVariable("$version");
		}catch(err){}
		return version;
	};
	/**
	 * Try and retrieve an ActiveX object having a specified name.
	 * 
	 * @param {String} name The ActiveX object name lookup.
	 * @return One of ActiveX object or a simple object having an attribute of activeXError with a value of true.
	 * @type Object
	 */
	var getActiveXObject = function(name){
		var obj = -1;
		try{
			obj = new ActiveXObject(name);
		}catch(err){
			obj = {activeXError:true};
		}
		return obj;
	};
	/**
	 * Parse an ActiveX $version string into an object.
	 * 
	 * @param {String} str The ActiveX Object GetVariable($version) return value. 
	 * @return An object having raw, major, minor, revision and revisionStr attributes.
	 * @type Object
	 */
	var parseActiveXVersion = function(str){
		var versionArray = str.split(",");//replace with regex
		return {
			"raw":str,
			"major":parseInt(versionArray[0].split(" ")[1], 10),
			"minor":parseInt(versionArray[1], 10),
			"revision":parseInt(versionArray[2], 10),
			"revisionStr":versionArray[2]
		};
	};
	/**
	 * Parse a standard enabledPlugin.description into an object.
	 * 
	 * @param {String} str The enabledPlugin.description value.
	 * @return An object having raw, major, minor, revision and revisionStr attributes.
	 * @type Object
	 */
	var parseStandardVersion = function(str){
		var descParts = str.split(/ +/);
		var majorMinor = descParts[2].split(/\./);
		var revisionStr = descParts[3];
		return {
			"raw":str,
			"major":parseInt(majorMinor[0], 10),
			"minor":parseInt(majorMinor[1], 10), 
			"revisionStr":revisionStr,
			"revision":parseRevisionStrToInt(revisionStr)
		};
	};
	/**
	 * Parse the plugin revision string into an integer.
	 * 
	 * @param {String} The revision in string format.
	 * @type Number
	 */
	var parseRevisionStrToInt = function(str){
		return parseInt(str.replace(/[a-zA-Z]/g, ""), 10) || self.revision;
	};
	/**
	 * Is the major version greater than or equal to a specified version.
	 * 
	 * @param {Number} version The minimum required major version.
	 * @type Boolean
	 */
	self.majorAtLeast = function(version){
		return self.major >= version;
	};
	/**
	 * Is the minor version greater than or equal to a specified version.
	 * 
	 * @param {Number} version The minimum required minor version.
	 * @type Boolean
	 */
	self.minorAtLeast = function(version){
		return self.minor >= version;
	};
	/**
	 * Is the revision version greater than or equal to a specified version.
	 * 
	 * @param {Number} version The minimum required revision version.
	 * @type Boolean
	 */
	self.revisionAtLeast = function(version){
		return self.revision >= version;
	};
	/**
	 * Is the version greater than or equal to a specified major, minor and revision.
	 * 
	 * @param {Number} major The minimum required major version.
	 * @param {Number} (Optional) minor The minimum required minor version.
	 * @param {Number} (Optional) revision The minimum required revision version.
	 * @type Boolean
	 */
	self.versionAtLeast = function(major){
		var properties = [self.major, self.minor, self.revision];
		var len = Math.min(properties.length, arguments.length);
		for(i=0; i<len; i++){
			if(properties[i]>=arguments[i]){
				if(i+1<len && properties[i]==arguments[i]){
					continue;
				}else{
					return true;
				}
			}else{
				return false;
			}
		}
	};
	/**
	 * Constructor, sets raw, major, minor, revisionStr, revision and installed public properties.
	 */
	self.FlashDetect = function(){
		if(navigator.plugins && navigator.plugins.length>0){
			var type = 'application/x-shockwave-flash';
			var mimeTypes = navigator.mimeTypes;
			if(mimeTypes && mimeTypes[type] && mimeTypes[type].enabledPlugin && mimeTypes[type].enabledPlugin.description){
				var version = mimeTypes[type].enabledPlugin.description;
				var versionObj = parseStandardVersion(version);
				self.raw = versionObj.raw;
				self.major = versionObj.major;
				self.minor = versionObj.minor; 
				self.revisionStr = versionObj.revisionStr;
				self.revision = versionObj.revision;
				self.installed = true;
			}
		}else if(navigator.appVersion.indexOf("Mac")==-1 && window.execScript){
			var version = -1;
			for(var i=0; i<activeXDetectRules.length && version==-1; i++){
				var obj = getActiveXObject(activeXDetectRules[i].name);
				if(!obj.activeXError){
					self.installed = true;
					version = activeXDetectRules[i].version(obj);
					if(version!=-1){
						var versionObj = parseActiveXVersion(version);
						self.raw = versionObj.raw;
						self.major = versionObj.major;
						self.minor = versionObj.minor; 
						self.revision = versionObj.revision;
						self.revisionStr = versionObj.revisionStr;
					}
				}
			}
		}
	}();
};
FlashDetect.JS_RELEASE = "1.0.4";