/**
 * @URL https://github.com/csetea/magpieJS
 * @license MIT
 */
// TODO check: https://code.google.com/p/crypto-js to include in magpie
// and maybe reuse
//@deprecated
define(
		[],
		function() {
			// private property
			var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
			// private method for UTF-8 encoding
			function _utf8_encode(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
			function _utf8_decode(utftext) {
				var string = "";
				var i = 0;

				var c = 0, c1 = 0, 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 {

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

					input = _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 + _keyStr.charAt(enc1) +
								_keyStr.charAt(enc2) +
								_keyStr.charAt(enc3) +
								_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 = _keyStr.indexOf(input.charAt(i++));
						enc2 = _keyStr.indexOf(input.charAt(i++));
						enc3 = _keyStr.indexOf(input.charAt(i++));
						enc4 = _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 = _utf8_decode(output);

					return output;

				}

			};

		});
