var Base64 = new Class(
{
	initialize: function()
	{
		this.keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
		//		this.indices = [];
		//		this.map = [];

		//		for (var i = 0; i < this.keyStr.length; i++)
		//		{
		//			this.indices[i] = this.keyStr.charAt(i);
		//			f64[b64s.charAt(i)] = i;
		//		}

	},

	encode: function(input)
	{
		var sb = new StringBuilder();
		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;
			}

			sb.append(this.keyStr.charAt(enc1));
			sb.append(this.keyStr.charAt(enc2));
			sb.append(this.keyStr.charAt(enc3));
			sb.append(this.keyStr.charAt(enc4));
		}

		return sb.toString();
	},

	decode: function(input)
	{
		var sb = new StringBuilder();
		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);
			sb.append(String.fromCharCode(chr1));

			if (enc3 != 64)
			{
				//output = output + String.fromCharCode(chr2);
				sb.append(String.fromCharCode(chr2));
			}
			if (enc4 != 64)
			{
				//output = output + String.fromCharCode(chr3);
				sb.append(String.fromCharCode(chr3));
			}
		}

		return base64._utf8_decode(sb.toString());
	},

	_utf8_encode: function(string)
	{
		string = string.replace(/\r\n/g, "\n");
		var sb = new StringBuilder();
		//var utftext = "";

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

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

		return sb.toString();
	},

	_utf8_decode: function(utftext)
	{
		var sb = new StringBuilder();
		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);
				sb.append(String.fromCharCode(c));
				i++;
			}
			else if ((c > 191) && (c < 224))
			{
				c2 = utftext.charCodeAt(i + 1);
				//string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				sb.append(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));
				sb.append(String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)));
				i += 3;
			}
		}

		//return string;
		return sb.toString();
	}
});

var Base64Json = new Class(
{
	initialize: function()
	{

	},

	encode: function(obj)
	{
		return base64.encode(JSON.encode(obj));
	},

	decode: function(base64String)
	{
		return JSON.decode(base64.decode(base64String));
	}
});

var base64 = new Base64();
var base64Json = new Base64Json();