/**
*
*  UserData object
*  @author Tore Holmberg
*
**/

var UserData = {

	// "constants"
	_cookie_name : "userdata",
	_cookie_time : 6*30,
	
	// private methods
	_decode : function(input)
	{
		return Base64.decode(input);
	},
	
	_encode : function(input)
	{
		return Base64.encode(input);
	},
	
	_getQuery : function()
	{
		return this._decode(window.location.search.substring(1)).split('&');
	},	
	
	_getCookie : function()
	{
		return this._decode(CookieUtil.read(this._cookie_name)).split('&');
	},
	
	_setCookie : function(key, value)
	{	
		if ( key == undefined || value == undefined ) return;
		
		var query = this._getQuery();
		var saved = this._getCookie();
		
		if(key && value) query.push(key + "=" + value);
		
		for(var i = 0; i < saved.length; i++) {
			var key = saved[i].split('=')[0];
			if(!this._hasParam(query, key))
				query.push(saved[i]);
		}
		
		var update = this._encode(query.sort().join('&'));
		CookieUtil.create(this._cookie_name, update, this._cookie_time);
	},
	
	_hasParam : function(arr, key)
	{
		for(var i = 0; i < arr.length; i++) {
			if(arr[i].split('=')[0] == key)
				return true;
		}
		return false;
	},	
	
	// public methods
	update : function()
	{	
		this._setCookie();
	},	
	
	getParam : function(key)
	{
		var saved = this._getCookie();
		for(var i = 0; i < saved.length; i++) {
			var param = saved[i].split('=');
			if(param[0] == key)
				return param[1];
		}
		return null;
	},
	
	setParam : function(key, value)
	{
		this._setCookie(key, value);
	},
	
	
	toString : function()
	{
		var saved = this._getCookie();
		var str = "[UserData]\n";
		for(var i = 0; i < saved.length; i++) {
			var param = saved[i].split('=');
			var key = param[0];
			var value = param[1];
			if(key.length > 0 && value.length > 0)
				str += key + ": " + value + "\n";
		}		
		return str;
	}	
}

/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/

var Base64 = {

	// private property
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

	// public method for encoding
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;

		input = Base64._utf8_encode(input);

		while (i < input.length) {
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);

			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;

			if (isNaN(chr2)) {
				enc3 = enc4 = 64;
			} else if (isNaN(chr3)) {
				enc4 = 64;
			}

			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
		}
		return output;
	},

	// public method for decoding
	decode : function (input) {
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;

		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

		while (i < input.length) {
			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.charAt(i++));

			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;

			output = output + String.fromCharCode(chr1);

			if (enc3 != 64) {
				output = output + String.fromCharCode(chr2);
			}
			if (enc4 != 64) {
				output = output + String.fromCharCode(chr3);
			}
		}
		output = Base64._utf8_decode(output);
		return output;
	},

	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
		}
		return utftext;
	},

	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;

		while ( i < utftext.length ) {

			c = utftext.charCodeAt(i);

			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
		}
		return string;
	}
}

/**
*
*  CookieUtil, based on http://www.quirksmode.org/js/cookies.html
*  @author Tore Holmberg
*
**/

var CookieUtil = {
	
	create : function(name, value, days) 
	{
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}	
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	},
	
	read : function(name) 
	{
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return "";
	},
	
	erease : function(name) 
	{
		createCookie(name,"",-1);
	}
}

// update params
UserData.update();

function getEmailUserName(labelName) {
	var labelLen = labelName.length;
	// read cookie property only once for speed
	var cookieData = document.cookie;
	var cLen = cookieData.length;
	var i = 0;
	var cEnd;
	while (i < cLen) {
		var j = i + labelLen;
			if (cookieData.substring(i,j) == labelName) {
			cEnd = cookieData.indexOf(";",j);
				if (cEnd == -1) {
				cEnd = cookieData.length;
				}
			return unescape(cookieData.substring(j+1, cEnd));
			}
		i++;
	}
	return "";
}