/* globals CryptoJS, moment */

/**
 * Utility functions for use in operations, the core framework and the stage.
 *
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2016
 * @license Apache-2.0
 *
 * @namespace
 */
var Utils = {

    /**
     * Translates an ordinal into a character.
     *
     * @param {number} o
     * @returns {char}
     *
     * @example
     * // returns 'a'
     * Utils.chr(97);
     */
    chr: function(o) {
        return String.fromCharCode(o);
    },


    /**
     * Translates a character into an ordinal.
     *
     * @param {char} c
     * @returns {number}
     *
     * @example
     * // returns 97
     * Utils.ord('a');
     */
    ord: function(c) {
        return c.charCodeAt(0);
    },


    /**
     * Adds leading zeros to strings
     *
     * @param {string} str - String to add leading characters to.
     * @param {number} max - Maximum width of the string.
     * @param {char} [chr='0'] - The character to pad with.
     * @returns {string}
     *
     * @example
     * // returns "0a"
     * Utils.pad_left("a", 2);
     *
     * // returns "000a"
     * Utils.pad_left("a", 4);
     *
     * // returns "xxxa"
     * Utils.pad_left("a", 4, "x");
     *
     * // returns "bcabchello"
     * Utils.pad_left("hello", 10, "abc");
     */
    pad_left: function(str, max, chr) {
        chr = chr || "0";
        var start_index = chr.length - (max - str.length);
        start_index = start_index < 0 ? 0 : start_index;
        return str.length < max ?
            Utils.pad_left(chr.slice(start_index, chr.length) + str, max, chr) : str;
    },


    /**
     * Adds trailing spaces to strings.
     *
     * @param {string} str - String to add trailing characters to.
     * @param {number} max - Maximum width of the string.
     * @param {char} [chr='0'] - The character to pad with.
     * @returns {string}
     *
     * @example
     * // returns "a   "
     * Utils.pad_right("a", 4);
     *
     * // returns "axxx"
     * Utils.pad_right("a", 4, "x");
     */
    pad_right: function(str, max, chr) {
        chr = chr || " ";
        return str.length < max ?
            Utils.pad_right(str + chr.slice(0, max-str.length), max, chr) : str;
    },


    /**
     * @alias Utils.pad_left
     */
    pad: function(str, max, chr) {
        return Utils.pad_left(str, max, chr);
    },


    /**
     * Truncates a long string to max length and adds suffix.
     *
     * @param {string} str - String to truncate
     * @param {number} max - Maximum length of the final string
     * @param {string} [suffix='...'] - The string to add to the end of the final string
     * @returns {string}
     *
     * @example
     * // returns "A long..."
     * Utils.truncate("A long string", 9);
     *
     * // returns "A long s-"
     * Utils.truncate("A long string", 9, "-");
     */
    truncate: function(str, max, suffix) {
        suffix = suffix || "...";
        if (str.length > max) {
            str = str.slice(0, max - suffix.length) + suffix;
        }
        return str;
    },


    /**
     * Converts a character or number to its hex representation.
     *
     * @param {char|number} c
     * @param {number} [length=2] - The width of the resulting hex number.
     * @returns {string}
     *
     * @example
     * // returns "6e"
     * Utils.hex("n");
     *
     * // returns "6e"
     * Utils.hex(110);
     */
    hex: function(c, length) {
        c = typeof c == "string" ? Utils.ord(c) : c;
        length = length || 2;
        return Utils.pad(c.toString(16), length);
    },


    /**
     * Converts a character or number to its binary representation.
     *
     * @param {char|number} c
     * @param {number} [length=8] - The width of the resulting binary number.
     * @returns {string}
     *
     * @example
     * // returns "01101110"
     * Utils.bin("n");
     *
     * // returns "01101110"
     * Utils.bin(110);
     */
    bin: function(c, length) {
        c = typeof c == "string" ? Utils.ord(c) : c;
        length = length || 8;
        return Utils.pad(c.toString(2), length);
    },


    /**
     * Returns a string with all non-printable chars as dots, optionally preserving whitespace.
     *
     * @param {string} str - The input string to display.
     * @param {boolean} [preserve_ws=false] - Whether or not to print whitespace.
     * @returns {string}
     */
    printable: function(str, preserve_ws) {
        if (window && window.app && !window.app.options.treat_as_utf8) {
            str = Utils.byte_array_to_chars(Utils.str_to_byte_array(str));
        }
        
        var re = /[\0-\x08\x0B-\x0C\x0E-\x1F\x7F-\x9F\xAD\u0378\u0379\u037F-\u0383\u038B\u038D\u03A2\u0528-\u0530\u0557\u0558\u0560\u0588\u058B-\u058E\u0590\u05C8-\u05CF\u05EB-\u05EF\u05F5-\u0605\u061C\u061D\u06DD\u070E\u070F\u074B\u074C\u07B2-\u07BF\u07FB-\u07FF\u082E\u082F\u083F\u085C\u085D\u085F-\u089F\u08A1\u08AD-\u08E3\u08FF\u0978\u0980\u0984\u098D\u098E\u0991\u0992\u09A9\u09B1\u09B3-\u09B5\u09BA\u09BB\u09C5\u09C6\u09C9\u09CA\u09CF-\u09D6\u09D8-\u09DB\u09DE\u09E4\u09E5\u09FC-\u0A00\u0A04\u0A0B-\u0A0E\u0A11\u0A12\u0A29\u0A31\u0A34\u0A37\u0A3A\u0A3B\u0A3D\u0A43-\u0A46\u0A49\u0A4A\u0A4E-\u0A50\u0A52-\u0A58\u0A5D\u0A5F-\u0A65\u0A76-\u0A80\u0A84\u0A8E\u0A92\u0AA9\u0AB1\u0AB4\u0ABA\u0ABB\u0AC6\u0ACA\u0ACE\u0ACF\u0AD1-\u0ADF\u0AE4\u0AE5\u0AF2-\u0B00\u0B04\u0B0D\u0B0E\u0B11\u0B12\u0B29\u0B31\u0B34\u0B3A\u0B3B\u0B45\u0B46\u0B49\u0B4A\u0B4E-\u0B55\u0B58-\u0B5B\u0B5E\u0B64\u0B65\u0B78-\u0B81\u0B84\u0B8B-\u0B8D\u0B91\u0B96-\u0B98\u0B9B\u0B9D\u0BA0-\u0BA2\u0BA5-\u0BA7\u0BAB-\u0BAD\u0BBA-\u0BBD\u0BC3-\u0BC5\u0BC9\u0BCE\u0BCF\u0BD1-\u0BD6\u0BD8-\u0BE5\u0BFB-\u0C00\u0C04\u0C0D\u0C11\u0C29\u0C34\u0C3A-\u0C3C\u0C45\u0C49\u0C4E-\u0C54\u0C57\u0C5A-\u0C5F\u0C64\u0C65\u0C70-\u0C77\u0C80\u0C81\u0C84\u0C8D\u0C91\u0CA9\u0CB4\u0CBA\u0CBB\u0CC5\u0CC9\u0CCE-\u0CD4\u0CD7-\u0CDD\u0CDF\u0CE4\u0CE5\u0CF0\u0CF3-\u0D01\u0D04\u0D0D\u0D11\u0D3B\u0D3C\u0D45\u0D49\u0D4F-\u0D56\u0D58-\u0D5F\u0D64\u0D65\u0D76-\u0D78\u0D80\u0D81\u0D84\u0D97-\u0D99\u0DB2\u0DBC\u0DBE\u0DBF\u0DC7-\u0DC9\u0DCB-\u0DCE\u0DD5\u0DD7\u0DE0-\u0DF1\u0DF5-\u0E00\u0E3B-\u0E3E\u0E5C-\u0E80\u0E83\u0E85\u0E86\u0E89\u0E8B\u0E8C\u0E8E-\u0E93\u0E98\u0EA0\u0EA4\u0EA6\u0EA8\u0EA9\u0EAC\u0EBA\u0EBE\u0EBF\u0EC5\u0EC7\u0ECE\u0ECF\u0EDA\u0EDB\u0EE0-\u0EFF\u0F48\u0F6D-\u0F70\u0F98\u0FBD\u0FCD\u0FDB-\u0FFF\u10C6\u10C8-\u10CC\u10CE\u10CF\u1249\u124E\u124F\u1257\u1259\u125E\u125F\u1289\u128E\u128F\u12B1\u12B6\u12B7\u12BF\u12C1\u12C6\u12C7\u12D7\u1311\u1316\u1317\u135B\u135C\u137D-\u137F\u139A-\u139F\u13F5-\u13FF\u169D-\u169F\u16F1-\u16FF\u170D\u1715-\u171F\u1737-\u173F\u1754-\u175F\u176D\u1771\u1774-\u177F\u17DE\u17DF\u17EA-\u17EF\u17FA-\u17FF\u180F\u181A-\u181F\u1878-\u187F\u18AB-\u18AF\u18F6-\u18FF\u191D-\u191F\u192C-\u192F\u193C-\u193F\u1941-\u1943\u196E\u196F\u1975-\u197F\u19AC-\u19AF\u19CA-\u19CF\u19DB-\u19DD\u1A1C\u1A1D\u1A5F\u1A7D\u1A7E\u1A8A-\u1A8F\u1A9A-\u1A9F\u1AAE-\u1AFF\u1B4C-\u1B4F\u1B7D-\u1B7F\u1BF4-\u1BFB\u1C38-\u1C3A\u1C4A-\u1C4C\u1C80-\u1CBF\u1CC8-\u1CCF\u1CF7-\u1CFF\u1DE7-\u1DFB\u1F16\u1F17\u1F1E\u1F1F\u1F46\u1F47\u1F4E\u1F4F\u1F58\u1F5A\u1F5C\u1F5E\u1F7E\u1F7F\u1FB5\u1FC5\u1FD4\u1FD5\u1FDC\u1FF0\u1FF1\u1FF5\u1FFF\u200B-\u200F\u202A-\u202E\u2060-\u206F\u2072\u2073\u208F\u209D-\u209F\u20BB-\u20CF\u20F1-\u20FF\u218A-\u218F\u23F4-\u23FF\u2427-\u243F\u244B-\u245F\u2700\u2B4D-\u2B4F\u2B5A-\u2BFF\u2C2F\u2C5F\u2CF4-\u2CF8\u2D26\u2D28-\u2D2C\u2D2E\u2D2F\u2D68-\u2D6E\u2D71-\u2D7E\u2D97-\u2D9F\u2DA7\u2DAF\u2DB7\u2DBF\u2DC7\u2DCF\u2DD7\u2DDF\u2E3C-\u2E7F\u2E9A\u2EF4-\u2EFF\u2FD6-\u2FEF\u2FFC-\u2FFF\u3040\u3097\u3098\u3100-\u3104\u312E-\u3130\u318F\u31BB-\u31BF\u31E4-\u31EF\u321F\u32FF\u4DB6-\u4DBF\u9FCD-\u9FFF\uA48D-\uA48F\uA4C7-\uA4CF\uA62C-\uA63F\uA698-\uA69E\uA6F8-\uA6FF\uA78F\uA794-\uA79F\uA7AB-\uA7F7\uA82C-\uA82F\uA83A-\uA83F\uA878-\uA87F\uA8C5-\uA8CD\uA8DA-\uA8DF\uA8FC-\uA8FF\uA954-\uA95E\uA97D-\uA97F\uA9CE\uA9DA-\uA9DD\uA9E0-\uA9FF\uAA37-\uAA3F\uAA4E\uAA4F\uAA5A\uAA5B\uAA7C-\uAA7F\uAAC3-\uAADA\uAAF7-\uAB00\uAB07\uAB08\uAB0F\uAB10\uAB17-\uAB1F\uAB27\uAB2F-\uABBF\uABEE\uABEF\uABFA-\uABFF\uD7A4-\uD7AF\uD7C7-\uD7CA\uD7FC-\uF8FF\uFA6E\uFA6F\uFADA-\uFAFF\uFB07-\uFB12\uFB18-\uFB1C\uFB37\uFB3D\uFB3F\uFB42\uFB45\uFBC2-\uFBD2\uFD40-\uFD4F\uFD90\uFD91\uFDC8-\uFDEF\uFDFE\uFDFF\uFE1A-\uFE1F\uFE27-\uFE2F\uFE53\uFE67\uFE6C-\uFE6F\uFE75\uFEFD-\uFF00\uFFBF-\uFFC1\uFFC8\uFFC9\uFFD0\uFFD1\uFFD8\uFFD9\uFFDD-\uFFDF\uFFE7\uFFEF-\uFFFB\uFFFE\uFFFF]/g;
        var ws_re = /[\x09-\x10\x0D\u2028\u2029]/g;
        
        str = str.replace(re, ".");
        if (!preserve_ws) str = str.replace(ws_re, ".");
        return str;
    },


    /**
     * Parse a string entered by a user and replace escaped chars with the bytes they represent.
     *
     * @param {string} str
     * @returns {string}
     *
     * @example
     * // returns "\x00"
     * Utils.parse_escaped_chars("\\x00");
     *
     * // returns "\n"
     * Utils.parse_escaped_chars("\\n");
     */
    parse_escaped_chars: function(str) {
        return str.replace(/(\\)?\\([nrtbf]|x[\da-f]{2})/g, function(m, a, b) {
            if (a == "\\") return "\\"+b;
            switch (b[0]) {
                case "n":
                    return "\n";
                case "r":
                    return "\r";
                case "t":
                    return "\t";
                case "b":
                    return "\b";
                case "f":
                    return "\f";
                case "x":
                    return Utils.chr(parseInt(b.substr(1), 16));
            }
        });
    },


    /**
     * Expand an alphabet range string into a list of the characters in that range.
     *
     * @param {string} alph_str
     * @returns {char[]}
     *
     * @example
     * // returns ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
     * Utils.expand_alph_range("0-9");
     *
     * // returns ["a", "b", "c", "d", "0", "1", "2", "3", "+", "/"]
     * Utils.expand_alph_range("a-d0-3+/");
     *
     * // returns ["a", "b", "c", "d", "0", "-", "3"]
     * Utils.expand_alph_range("a-d0\\-3")
     */
    expand_alph_range: function(alph_str) {
        var alph_arr = [];
        
        for (var i = 0; i < alph_str.length; i++) {
            if (i < alph_str.length - 2 &&
                alph_str[i+1] == "-" &&
                alph_str[i] != "\\") {
                var start = Utils.ord(alph_str[i]),
                    end = Utils.ord(alph_str[i+2]);
                    
                for (var j = start; j <= end; j++) {
                    alph_arr.push(Utils.chr(j));
                }
                i += 2;
            } else if (i < alph_str.length - 2 &&
                alph_str[i] == "\\" &&
                alph_str[i+1] == "-") {
                alph_arr.push("-");
                i++;
            } else {
                alph_arr.push(alph_str[i]);
            }
        }
        return alph_arr;
    },


    /**
     * Translates a hex string into an array of bytes.
     *
     * @param {string} hex_str
     * @returns {byte_array}
     *
     * @example
     * // returns [0xfe, 0x09, 0xa7]
     * Utils.hex_to_byte_array("fe09a7");
     */
    hex_to_byte_array: function(hex_str) {
        // TODO: Handle errors i.e. input string is not hex
        if (!hex_str) return [];
        hex_str = hex_str.replace(/\s+/g, '');
        var byte_array = [];
        for (var i = 0; i < hex_str.length; i += 2) {
            byte_array.push(parseInt(hex_str.substr(i, 2), 16));
        }
        return byte_array;
    },


    /**
     * Translates an array of bytes to a hex string.
     *
     * @param {byte_array} byte_array
     * @returns {string}
     *
     * @example
     * // returns "fe09a7"
     * Utils.byte_array_to_hex([0xfe, 0x09, 0xa7]);
     */
    byte_array_to_hex: function(byte_array) {
        if (!byte_array) return "";
        var hex_str = "";
        for (var i = 0; i < byte_array.length; i++) {
            hex_str += Utils.hex(byte_array[i]) + " ";
        }
        return hex_str.slice(0, hex_str.length-1);
    },


    /**
     * Converts a string to a byte array.
     * Treats the string as UTF-8 if any values are over 255.
     *
     * @param {string} str
     * @returns {byte_array}
     *
     * @example
     * // returns [72,101,108,108,111]
     * Utils.str_to_byte_array("Hello");
     *
     * // returns [228,189,160,229,165,189]
     * Utils.str_to_byte_array("你好");
     */
    str_to_byte_array: function(str) {
        var byte_array = new Array(str.length);
        var i = str.length, b;
        while (i--) {
            b = str.charCodeAt(i);
            byte_array[i] = b;
            // If any of the bytes are over 255, read as UTF-8
            if (b > 255) return Utils.str_to_utf8_byte_array(str);
        }
        return byte_array;
    },


    /**
     * Converts a string to a UTF-8 byte array.
     *
     * @param {string} str
     * @returns {byte_array}
     *
     * @example
     * // returns [72,101,108,108,111]
     * Utils.str_to_utf8_byte_array("Hello");
     *
     * // returns [228,189,160,229,165,189]
     * Utils.str_to_utf8_byte_array("你好");
     */
    str_to_utf8_byte_array: function(str) {
        var word_array = CryptoJS.enc.Utf8.parse(str),
            byte_array = Utils.word_array_to_byte_array(word_array);

        if (str.length != word_array.sigBytes)
            window.app.options.attempt_highlight = false;
        return byte_array;
    },


    /**
     * Converts a string to a charcode array
     *
     * @param {string} str
     * @returns {byte_array}
     *
     * @example
     * // returns [72,101,108,108,111]
     * Utils.str_to_charcode("Hello");
     *
     * // returns [20320,22909]
     * Utils.str_to_charcode("你好");
     */
    str_to_charcode: function(str) {
        var byte_array = new Array(str.length);
        var i = str.length;
        while (i--) {
            byte_array[i] = str.charCodeAt(i);
        }
        return byte_array;
    },


    /**
     * Attempts to convert a byte array to a UTF-8 string.
     *
     * @param {byte_array} byte_array
     * @returns {string}
     *
     * @example
     * // returns "Hello"
     * Utils.byte_array_to_utf8([72,101,108,108,111]);
     *
     * // returns "你好"
     * Utils.byte_array_to_utf8([228,189,160,229,165,189]);
     */
    byte_array_to_utf8: function(byte_array) {
        try {
            // Try to output data as UTF-8 string
            var words = [];
            for (var i = 0; i < byte_array.length; i++) {
                words[i >>> 2] |= byte_array[i] << (24 - (i % 4) * 8);
            }
            var word_array = new CryptoJS.lib.WordArray.init(words, byte_array.length),
                str = CryptoJS.enc.Utf8.stringify(word_array);
            
            if (str.length != word_array.sigBytes)
                window.app.options.attempt_highlight = false;
            return str;
        } catch (err) {
            // If it fails, treat it as ANSI
            return Utils.byte_array_to_chars(byte_array);
        }
    },


    /**
     * Converts a charcode array to a string.
     *
     * @param {byte_array} byte_array
     * @returns {string}
     *
     * @example
     * // returns "Hello"
     * Utils.byte_array_to_chars([72,101,108,108,111]);
     *
     * // returns "你好"
     * Utils.byte_array_to_chars([20320,22909]);
     */
    byte_array_to_chars: function(byte_array) {
        if (!byte_array) return "";
        var str = "";
        for (var i = 0; i < byte_array.length;) {
            str += String.fromCharCode(byte_array[i++]);
        }
        return str;
    },
    
    
    /**
     * Converts a CryptoJS.lib.WordArray to a byte_array.
     *
     * @param {CryptoJS.lib.WordArray} word_array
     * @returns {byte_array}
     *
     * @example
     * // returns [84, 101, 115, 116]
     * Utils.word_array_to_byte_array(CryptoJS.enc.Hex.parse("54657374"));
     */
    word_array_to_byte_array: function(word_array) {
        if (word_array.sigBytes <= 0) return [];
        
        var words = word_array.words,
            byte_array = [];
            
        for (var i = 0; i < word_array.sigBytes; i++) {
            byte_array.push((words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff);
        }
        
        return byte_array;
    },


    /**
     * Mapping of Unicode code points to Windows-1251
     * @private
     * @constant
     */
    UNIC_WIN1251_MAP: {
        0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11, 12: 12, 13: 13,
        14: 14, 15: 15, 16: 16, 17: 17, 18: 18, 19: 19, 20: 20, 21: 21, 22: 22, 23: 23, 24: 24,
        25: 25, 26: 26, 27: 27, 28: 28, 29: 29, 30: 30, 31: 31, 32: 32, 33: 33, 34: 34, 35: 35,
        36: 36, 37: 37, 38: 38, 39: 39, 40: 40, 41: 41, 42: 42, 43: 43, 44: 44, 45: 45, 46: 46,
        47: 47, 48: 48, 49: 49, 50: 50, 51: 51, 52: 52, 53: 53, 54: 54, 55: 55, 56: 56, 57: 57,
        58: 58, 59: 59, 60: 60, 61: 61, 62: 62, 63: 63, 64: 64, 65: 65, 66: 66, 67: 67, 68: 68,
        69: 69, 70: 70, 71: 71, 72: 72, 73: 73, 74: 74, 75: 75, 76: 76, 77: 77, 78: 78, 79: 79,
        80: 80, 81: 81, 82: 82, 83: 83, 84: 84, 85: 85, 86: 86, 87: 87, 88: 88, 89: 89, 90: 90,
        91: 91, 92: 92, 93: 93, 94: 94, 95: 95, 96: 96, 97: 97, 98: 98, 99: 99, 100: 100, 101: 101,
        102: 102, 103: 103, 104: 104, 105: 105, 106: 106, 107: 107, 108: 108, 109: 109, 110: 110,
        111: 111, 112: 112, 113: 113, 114: 114, 115: 115, 116: 116, 117: 117, 118: 118, 119: 119,
        120: 120, 121: 121, 122: 122, 123: 123, 124: 124, 125: 125, 126: 126, 127: 127, 1027: 129,
        8225: 135, 1046: 198, 8222: 132, 1047: 199, 1168: 165, 1048: 200, 1113: 154, 1049: 201,
        1045: 197, 1050: 202, 1028: 170, 160: 160, 1040: 192, 1051: 203, 164: 164, 166: 166,
        167: 167, 169: 169, 171: 171, 172: 172, 173: 173, 174: 174, 1053: 205, 176: 176, 177: 177,
        1114: 156, 181: 181, 182: 182, 183: 183, 8221: 148, 187: 187, 1029: 189, 1056: 208,
        1057: 209, 1058: 210, 8364: 136, 1112: 188, 1115: 158, 1059: 211, 1060: 212, 1030: 178,
        1061: 213, 1062: 214, 1063: 215, 1116: 157, 1064: 216, 1065: 217, 1031: 175, 1066: 218,
        1067: 219, 1068: 220, 1069: 221, 1070: 222, 1032: 163, 8226: 149, 1071: 223, 1072: 224,
        8482: 153, 1073: 225, 8240: 137, 1118: 162, 1074: 226, 1110: 179, 8230: 133, 1075: 227,
        1033: 138, 1076: 228, 1077: 229, 8211: 150, 1078: 230, 1119: 159, 1079: 231, 1042: 194,
        1080: 232, 1034: 140, 1025: 168, 1081: 233, 1082: 234, 8212: 151, 1083: 235, 1169: 180,
        1084: 236, 1052: 204, 1085: 237, 1035: 142, 1086: 238, 1087: 239, 1088: 240, 1089: 241,
        1090: 242, 1036: 141, 1041: 193, 1091: 243, 1092: 244, 8224: 134, 1093: 245, 8470: 185,
        1094: 246, 1054: 206, 1095: 247, 1096: 248, 8249: 139, 1097: 249, 1098: 250, 1044: 196,
        1099: 251, 1111: 191, 1055: 207, 1100: 252, 1038: 161, 8220: 147, 1101: 253, 8250: 155,
        1102: 254, 8216: 145, 1103: 255, 1043: 195, 1105: 184, 1039: 143, 1026: 128, 1106: 144,
        8218: 130, 1107: 131, 8217: 146, 1108: 186, 1109: 190
    },

    /**
     * Mapping of Windows-1251 code points to Unicode
     * @private
     * @constant
     */
    WIN1251_UNIC_MAP: {
        0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11, 12: 12, 13: 13,
        14: 14, 15: 15, 16: 16, 17: 17, 18: 18, 19: 19, 20: 20, 21: 21, 22: 22, 23: 23, 24: 24,
        25: 25, 26: 26, 27: 27, 28: 28, 29: 29, 30: 30, 31: 31, 32: 32, 33: 33, 34: 34, 35: 35,
        36: 36, 37: 37, 38: 38, 39: 39, 40: 40, 41: 41, 42: 42, 43: 43, 44: 44, 45: 45, 46: 46,
        47: 47, 48: 48, 49: 49, 50: 50, 51: 51, 52: 52, 53: 53, 54: 54, 55: 55, 56: 56, 57: 57,
        58: 58, 59: 59, 60: 60, 61: 61, 62: 62, 63: 63, 64: 64, 65: 65, 66: 66, 67: 67, 68: 68,
        69: 69, 70: 70, 71: 71, 72: 72, 73: 73, 74: 74, 75: 75, 76: 76, 77: 77, 78: 78, 79: 79,
        80: 80, 81: 81, 82: 82, 83: 83, 84: 84, 85: 85, 86: 86, 87: 87, 88: 88, 89: 89, 90: 90,
        91: 91, 92: 92, 93: 93, 94: 94, 95: 95, 96: 96, 97: 97, 98: 98, 99: 99, 100: 100, 101: 101,
        102: 102, 103: 103, 104: 104, 105: 105, 106: 106, 107: 107, 108: 108, 109: 109, 110: 110,
        111: 111, 112: 112, 113: 113, 114: 114, 115: 115, 116: 116, 117: 117, 118: 118, 119: 119,
        120: 120, 121: 121, 122: 122, 123: 123, 124: 124, 125: 125, 126: 126, 127: 127, 160: 160,
        164: 164, 166: 166, 167: 167, 169: 169, 171: 171, 172: 172, 173: 173, 174: 174, 176: 176,
        177: 177, 181: 181, 182: 182, 183: 183, 187: 187, 168: 1025, 128: 1026, 129: 1027,
        170: 1028, 189: 1029, 178: 1030, 175: 1031, 163: 1032, 138: 1033, 140: 1034, 142: 1035,
        141: 1036, 161: 1038, 143: 1039, 192: 1040, 193: 1041, 194: 1042, 195: 1043, 196: 1044,
        197: 1045, 198: 1046, 199: 1047, 200: 1048, 201: 1049, 202: 1050, 203: 1051, 204: 1052,
        205: 1053, 206: 1054, 207: 1055, 208: 1056, 209: 1057, 210: 1058, 211: 1059, 212: 1060,
        213: 1061, 214: 1062, 215: 1063, 216: 1064, 217: 1065, 218: 1066, 219: 1067, 220: 1068,
        221: 1069, 222: 1070, 223: 1071, 224: 1072, 225: 1073, 226: 1074, 227: 1075, 228: 1076,
        229: 1077, 230: 1078, 231: 1079, 232: 1080, 233: 1081, 234: 1082, 235: 1083, 236: 1084,
        237: 1085, 238: 1086, 239: 1087, 240: 1088, 241: 1089, 242: 1090, 243: 1091, 244: 1092,
        245: 1093, 246: 1094, 247: 1095, 248: 1096, 249: 1097, 250: 1098, 251: 1099, 252: 1100,
        253: 1101, 254: 1102, 255: 1103, 184: 1105, 144: 1106, 131: 1107, 186: 1108, 190: 1109,
        179: 1110, 191: 1111, 188: 1112, 154: 1113, 156: 1114, 158: 1115, 157: 1116, 162: 1118,
        159: 1119, 165: 1168, 180: 1169, 150: 8211, 151: 8212, 145: 8216, 146: 8217, 130: 8218,
        147: 8220, 148: 8221, 132: 8222, 134: 8224, 135: 8225, 149: 8226, 133: 8230, 137: 8240,
        139: 8249, 155: 8250, 136: 8364, 185: 8470, 153: 8482
    },

        
    /**
     * Converts a Unicode string to Windows-1251 encoding
     *
     * @param {string} unic_str
     * @returns {string} String encoded in Windows-1251
     *
     * @example
     * // returns "îáíîâëåííàÿ òåõíè÷êà ïî Áîèíãó. îðèãèíàë ó ìåíÿ. çàáåðåòå êîãäà áóäåòå â ÊÈ"
     * Utils.unicode_to_win1251("обновленная техничка по Боингу. оригинал у меня. заберете когда будете в КИ");
     */
    unicode_to_win1251: function(unic_str) {
        var res = [];
        
        for (var i = 0; i < unic_str.length; i++) {
            var ord = unic_str.charCodeAt(i);
            if (!(ord in Utils.UNIC_WIN1251_MAP))
                throw "Character '" + unic_str.charAt(i) + "' isn't supported by Windows-1251";
            res.push(String.fromCharCode(Utils.UNIC_WIN1251_MAP[ord]));
        }
        
        return res.join('');
    },


    /**
     * Converts a Windows-1251 string to Unicode encoding
     *
     * @param {string} win1251_str
     * @returns {string} String encoded in Unicode
     *
     * @example
     * // returns "обновленная техничка по Боингу. оригинал у меня. заберете когда будете в КИ"
     * Utils.unicode_to_win1251("îáíîâëåííàÿ òåõíè÷êà ïî Áîèíãó. îðèãèíàë ó ìåíÿ. çàáåðåòå êîãäà áóäåòå â ÊÈ");
     */
    win1251_to_unicode: function(win1251_str) {
        var res = [];
        
        for (var i = 0; i < win1251_str.length; i++) {
            var ord = win1251_str.charCodeAt(i);
            if (!(ord in Utils.WIN1251_UNIC_MAP))
                throw "Character '" + win1251_str.charAt(i) + "' isn't supported by Windows-1251";
            res.push(String.fromCharCode(Utils.WIN1251_UNIC_MAP[ord]));
        }
        
        return res.join('');
    },


    /**
     * Base64's the input byte array using the given alphabet, returning a string.
     *
     * @param {byte_array|string} data
     * @param {string} [alphabet]
     * @returns {string}
     *
     * @example
     * // returns "SGVsbG8="
     * Utils.to_base64([72, 101, 108, 108, 111]);
     *
     * // returns "SGVsbG8="
     * Utils.to_base64("Hello");
     */
    to_base64: function(data, alphabet) {
        if (!data) return "";
        if (typeof data == "string") {
            data = Utils.str_to_byte_array(data);
        }
        
        alphabet = alphabet ?
            Utils.expand_alph_range(alphabet).join("") :
            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
        var output = "",
            chr1, chr2, chr3,
            enc1, enc2, enc3, enc4,
            i = 0;

        while (i < data.length) {
            chr1 = data[i++];
            chr2 = data[i++];
            chr3 = data[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 += alphabet.charAt(enc1) + alphabet.charAt(enc2) +
                alphabet.charAt(enc3) + alphabet.charAt(enc4);
        }

        return output;
    },


    /**
     * UnBase64's the input string using the given alphabet, returning a byte array.
     *
     * @param {byte_array} data
     * @param {string} [alphabet]
     * @param {string} [return_type="string"] - Either "string" or "byte_array"
     * @param {boolean} [remove_non_alph_chars=true]
     * @returns {byte_array}
     *
     * @example
     * // returns "Hello"
     * Utils.from_base64("SGVsbG8=");
     *
     * // returns [72, 101, 108, 108, 111]
     * Utils.from_base64("SGVsbG8=", null, "byte_array");
     */
    from_base64: function(data, alphabet, return_type, remove_non_alph_chars) {
        return_type = return_type || "string";
        
        if (!data) {
            return return_type == "string" ? "" : [];
        }
        
        alphabet = alphabet ?
            Utils.expand_alph_range(alphabet).join("") :
            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
        if (remove_non_alph_chars === undefined)
            remove_non_alph_chars = true;
        
        var output = [],
            chr1, chr2, chr3,
            enc1, enc2, enc3, enc4,
            i = 0;
        
        if (remove_non_alph_chars) {
            var re = new RegExp("[^" + alphabet.replace(/[\[\]\\\-^$]/g, "\\$&") + "]", "g");
            data = data.replace(re, "");
        }

        while (i < data.length) {
            enc1 = alphabet.indexOf(data.charAt(i++));
            enc2 = alphabet.indexOf(data.charAt(i++) || "=");
            enc3 = alphabet.indexOf(data.charAt(i++) || "=");
            enc4 = alphabet.indexOf(data.charAt(i++) || "=");
            
            enc2 = enc2 == -1 ? 64 : enc2;
            enc3 = enc3 == -1 ? 64 : enc3;
            enc4 = enc4 == -1 ? 64 : enc4;

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

            output.push(chr1);

            if (enc3 != 64) {
                output.push(chr2);
            }
            if (enc4 != 64) {
                output.push(chr3);
            }
        }
        
        return return_type == "string" ? Utils.byte_array_to_utf8(output) : output;
    },


    /**
     * Convert a byte array into a hex string.
     *
     * @param {byte_array} data
     * @param {string} [delim=" "]
     * @param {number} [padding=2]
     * @returns {string}
     *
     * @example
     * // returns "0a 14 1e"
     * Utils.to_hex([10,20,30]);
     *
     * // returns "0a:14:1e"
     * Utils.to_hex([10,20,30], ":");
     */
    to_hex: function(data, delim, padding) {
        if (!data) return "";
        
        delim = typeof delim == "string" ? delim : " ";
        padding = padding || 2;
        var output = "";
        
        for (var i = 0; i < data.length; i++) {
            output += Utils.pad(data[i].toString(16), padding) + delim;
        }
        
        // Add \x or 0x to beginning
        if (delim == "0x") output = "0x" + output;
        if (delim == "\\x") output = "\\x" + output;
        
        if (delim.length)
            return output.slice(0, -delim.length);
        else
            return output;
    },
    
    
    /**
     * Convert a byte array into a hex string as efficiently as possible with no options.
     *
     * @param {byte_array} data
     * @returns {string}
     *
     * @example
     * // returns "0a141e"
     * Utils.to_hex([10,20,30]);
     */
    to_hex_fast: function(data) {
        if (!data) return "";
        
        var output = [];
        
        for (var i = 0; i < data.length; i++) {
            output.push((data[i] >>> 4).toString(16));
            output.push((data[i] & 0x0f).toString(16));
        }
        
        return output.join("");
    },


    /**
     * Convert a hex string into a byte array.
     *
     * @param {string} data
     * @param {string} [delim]
     * @param {number} [byte_len=2]
     * @returns {byte_array}
     *
     * @example
     * // returns [10,20,30]
     * Utils.from_hex("0a 14 1e");
     *
     * // returns [10,20,30]
     * Utils.from_hex("0a:14:1e", "Colon");
     */
    from_hex: function(data, delim, byte_len) {
        delim = delim || (data.indexOf(" ") >= 0 ? "Space" : "None");
        byte_len = byte_len || 2;
        if (delim != "None") {
            var delim_regex = Utils.regex_rep[delim];
            data = data.replace(delim_regex, '');
        }
        
        var output = [];
        for (var i = 0; i < data.length; i += byte_len) {
            output.push(parseInt(data.substr(i, byte_len), 16));
        }
        return output;
    },
    
    
    /**
     * Parses CSV data and returns it as a two dimensional array or strings.
     *
     * @param {string} data
     * @returns {string[][]}
     *
     * @example
     * // returns [["head1", "head2"], ["data1", "data2"]]
     * Utils.parse_csv("head1,head2\ndata1,data2");
     */
    parse_csv: function(data) {
        
        var b,
            ignore_next = false,
            in_string = false,
            cell = "",
            line = [],
            lines = [];
            
        for (var i = 0; i < data.length; i++) {
            b = data[i];
            if (ignore_next) {
                cell += b;
                ignore_next = false;
            } else if (b == "\\") {
                cell += b;
                ignore_next = true;
            } else if (b == "\"" && !in_string) {
                in_string = true;
            } else if (b == "\"" && in_string) {
                in_string = false;
            } else if (b == "," && !in_string) {
                line.push(cell);
                cell = "";
            } else if ((b == "\n" || b == "\r") && !in_string) {
                line.push(cell);
                cell = "";
                lines.push(line);
                line = [];
            } else {
                cell += b;
            }
        }
        
        if (line.length) {
            line.push(cell);
            lines.push(line);
        }
        
        return lines;
    },


    /**
     * Removes all HTML (or XML) tags from the input string.
     *
     * @param {string} html_str
     * @param {boolean} remove_script_and_style - Flag to specify whether to remove entire script or style blocks
     * @returns {string}
     *
     * @example
     * // returns "Test"
     * Utils.strip_html_tags("<div>Test</div>");
     */
    strip_html_tags: function(html_str, remove_script_and_style) {
        if (remove_script_and_style) {
            html_str = html_str.replace(/<(script|style)[^>]*>.*<\/(script|style)>/gmi, "");
        }
        return html_str.replace(/<[^>\n]+>/g, "");
    },


    /**
     * Escapes HTML tags in a string to stop them being rendered
     *
     * @param {string} str
     * @returns string
     *
     * @example
     * // return "A &lt;script> tag"
     * Utils.escape_html("A <script> tag");
     */
    escape_html: function(str) {
        return str.replace(/</g, "&lt;");
    },


    /**
     * Expresses a number of milliseconds in a human readable format.
     *
     * Range                        | Sample Output
     * -----------------------------|-------------------------------
     * 0 to 45 seconds              | a few seconds ago
     * 45 to 90 seconds             | a minute ago
     * 90 seconds to 45 minutes     | 2 minutes ago ... 45 minutes ago
     * 45 to 90 minutes             | an hour ago
     * 90 minutes to 22 hours       | 2 hours ago ... 22 hours ago
     * 22 to 36 hours               | a day ago
     * 36 hours to 25 days          | 2 days ago ... 25 days ago
     * 25 to 45 days                | a month ago
     * 45 to 345 days               | 2 months ago ... 11 months ago
     * 345 to 545 days (1.5 years)  | a year ago
     * 546 days+                    | 2 years ago ... 20 years ago
     *
     * @param {number} ms
     * @returns {string}
     *
     * @example
     * // returns "3 minutes"
     * Utils.fuzzy_time(152435);
     *
     * // returns "5 days"
     * Utils.fuzzy_time(456851321);
     */
    fuzzy_time: function(ms) {
        return moment.duration(ms, "milliseconds").humanize();
    },
    
    
    /**
     * Adds the properties of one Object to another.
     *
     * @param {Object} a
     * @param {Object} b
     * @returns {Object}
     */
    extend: function(a, b){
        for(var key in b)
            if(b.hasOwnProperty(key))
                a[key] = b[key];
        return a;
    },


    /**
     * A mapping of names of delimiter characters to their symbols.
     * @constant
     */
    char_rep: {
        "Space":      " ",
        "Comma":      ",",
        "Semi-colon": ";",
        "Colon":      ":",
        "Line feed":  "\n",
        "CRLF":       "\r\n",
        "0x":         "0x",
        "\\x":        "\\x",
        "Nothing (separate chars)": "",
        "None":       "",
    },


    /**
     * A mapping of names of delimiter characters to regular expressions which can select them.
     * @constant
     */
    regex_rep: {
        "Space":      /\s+/g,
        "Comma":      /,/g,
        "Semi-colon": /;/g,
        "Colon":      /:/g,
        "Line feed":  /\n/g,
        "CRLF":       /\r\n/g,
        "0x":         /0x/g,
        "\\x":        /\\x/g
    },


    /**
     * A mapping of string formats to their classes in the CryptoJS library.
     * @constant
     */
    format: {
        "Hex":     CryptoJS.enc.Hex,
        "Base64":  CryptoJS.enc.Base64,
        "UTF8":    CryptoJS.enc.Utf8,
        "UTF16":   CryptoJS.enc.Utf16,
        "UTF16LE": CryptoJS.enc.Utf16LE,
        "UTF16BE": CryptoJS.enc.Utf16BE,
        "Latin1":  CryptoJS.enc.Latin1,
    },
    
};


/**
 * A jQuery function to select a range of text.
 *
 * @param {number} start
 * @param {number} end
 *
 * @example
 * // Highlights the 4th, 5th and 6th characters in the element #input-text.
 * $("#input-text").selectRange(3,5);
 *
 * // Places the cursor at the beginning of the element #input-text.
 * $("#input-text").selectRange(0);
 */
$.fn.selectRange = function(start, end) {
    if (!end) end = start;
    return this.each(function() {
        if (this.setSelectionRange) {
            this.focus();
            this.setSelectionRange(start, end);
        } else if (this.createTextRange) {
            var range = this.createTextRange();
            range.collapse(true);
            range.moveEnd('character', end);
            range.moveStart('character', start);
            range.select();
        }
    });
};


/**
 * Removes all duplicates from an array.
 *
 * @returns {Array}
 *
 * @example
 * // returns [3,6,4,8,2]
 * [3,6,4,8,4,2,3].unique();
 *
 * // returns ["One", "Two", "Three"]
 * ["One", "Two", "Three", "One"].unique();
 */
Array.prototype.unique = function() {
    var u = {}, a = [];
    for (var i = 0, l = this.length; i < l; i++) {
        if (u.hasOwnProperty(this[i])) {
            continue;
        }
        a.push(this[i]);
        u[this[i]] = 1;
    }
    return a;
};


/**
 * Returns the largest value in the array.
 *
 * @returns {number}
 *
 * @example
 * // returns 7
 * [4,2,5,3,7].max();
 */
Array.prototype.max = function() {
    return Math.max.apply(null, this);
};


/**
 * Returns the smallest value in the array.
 *
 * @returns {number}
 *
 * @example
 * // returns 2
 * [4,2,5,3,7].min();
 */
Array.prototype.min = function() {
    return Math.min.apply(null, this);
};


/**
 * Sums all the values in an array.
 *
 * @returns {number}
 *
 * @example
 * // returns 21
 * [4,2,5,3,7].sum();
 */
Array.prototype.sum = function() {
    return this.reduce(function (a, b) {
        return a + b;
    }, 0);
};


/**
 * Determine whether two arrays are equal or not.
 *
 * @param {Object[]} other
 * @returns {boolean}
 *
 * @example
 * // returns true
 * [1,2,3].equals([1,2,3]);
 *
 * // returns false
 * [1,2,3].equals([3,2,1]);
 */
Array.prototype.equals = function(other) {
    if (!other) return false;
    var i = this.length;
    if (i != other.length) return false;
    while (i--) {
        if (this[i] !== other[i]) return false;
    }
    return true;
};


/**
 * Counts the number of times a char appears in a string.
 *
 * @param {char} chr
 * @returns {number}
 *
 * @example
 * // returns 2
 * "Hello".count("l");
 */
String.prototype.count = function(chr) {
    return this.split(chr).length - 1;
};



////////////////////////////////////////////////////////////////////////////////////////////////////
// Library overrides ///////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////

/**
 * Override for the CryptoJS Hex encoding parser to remove whitespace before attempting to parse
 * the hex string.
 *
 * @param {string} hexStr
 * @returns {CryptoJS.lib.WordArray}
 */
CryptoJS.enc.Hex.parse = function (hexStr) {
    // Remove whitespace
    hexStr = hexStr.replace(/\s/g, "");
    
    // Shortcut
    var hexStrLength = hexStr.length;

    // Convert
    var words = [];
    for (var i = 0; i < hexStrLength; i += 2) {
        words[i >>> 3] |= parseInt(hexStr.substr(i, 2), 16) << (24 - (i % 8) * 4);
    }

    return new CryptoJS.lib.WordArray.init(words, hexStrLength / 2);
};