(function($) {
    function toIntegersAtLease(n)
    {
        return n < 10 ? '0' + n : n;
    }

    //noinspection JSUnusedLocalSymbols
    Date.prototype.toJSON = function(date)
    {
        return this.getUTCFullYear() + '-' +
               toIntegersAtLease(this.getUTCMonth()) + '-' +
               toIntegersAtLease(this.getUTCDate());
    };
    var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;
    var meta = {'\b':'\\b','\t':'\\t','\n':'\\n','\f':'\\f','\r':'\\r','"':'\\"','\\':'\\\\'};
    $.quoteString = function(string)
    {
        if (escapeable.test(string))
        {
            return'"' + string.replace(escapeable, function(a)
            {
                var c = meta[a];
                if (typeof c === 'string') {
                    return c;
                }
                c = a.charCodeAt();
                return'\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
            }) + '"';
        }
        return'"' + string + '"';
    };
    $.toJSON = function(o, compact)
    {
        var type = typeof(o);
        if (type == "undefined")
            return"undefined"; else if (type == "number" || type == "boolean")
            return o + ""; else if (o === null)
                return"null";
        if (type == "string")
        {
            return $.quoteString(o);
        }
        if (type == "object" && typeof o.toJSON == "function")
            return o.toJSON(compact);
        var ret = [];
        if (type != "function" && typeof(o.length) == "number")
        {
            for (var i = 0; i < o.length; i++) {
                ret.push($.toJSON(o[i], compact));
            }
            if (compact)
                return"[" + ret.join(",") + "]"; else
                return"[" + ret.join(", ") + "]";
        }
        if (type == "function") {
            throw new TypeError("Unable to convert object of type 'function' to json.");
        }
        for (var k in o) {
            var name;
            type = typeof(k);
            if (type == "number")
                name = '"' + k + '"'; else if (type == "string")
                name = $.quoteString(k); else
                continue;
            var val = $.toJSON(o[k], compact);
            if (typeof(val) != "string") {
                continue;
            }
            if (compact)
                ret.push(name + ":" + val); else
                ret.push(name + ": " + val);
        }
        return"{" + ret.join(", ") + "}";
    };
    $.compactJSON = function(o)
    {
        return $.toJSON(o, true);
    };
    $.evalJSON = function(src)
    {
        return eval("(" + src + ")");
    };
    $.secureEvalJSON = function(src)
    {
        var filtered = src;
        filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@');
        filtered = filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
        filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
        if (/^[\],:{}\s]*$/.test(filtered))
            return eval("(" + src + ")"); else
            throw new SyntaxError("Error parsing JSON, source is not valid.");
    };
})(jQuery);