Ext.namespace('Kelda', 'Kelda.Info');

Kelda.Info.Utils = function() {
	var _instance = null;
	return {
		getInstance:function() {
			if(_instance === null)
				_instance = {
					// public method for url encoding
				    encode : function (string) {
				        string = string.replace(/rn/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;
				    },

				    // public method for url decoding
				    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;
				    }
			};
			return _instance;
		}
	};
}();