/**
* labs_json Script by Giraldo Rosales.
* Version 1.0
* Visit www.liquidgear.net for documentation and updates.
*
*
* Copyright (c) 2009 Nitrogen Design, Inc. All rights reserved.
* 
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
* 
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
**/

/**
* HOW TO USE
* ==========
* Encode:
* var obj = {};
* obj.name	= "Test JSON";
* obj.type	= "test";
* $.json.encode(obj); //output: {"name":"Test JSON", "type":"test"}
* 
* Decode:
* $.json.decode({"name":"Test JSON", "type":"test"}); //output: object
* 
*/

jQuery.json = {
    encode: function(value, replacer, space) {
        var i;
        gap = '';
        var indent = '';

        if (typeof space === 'number') {
            for (i = 0; i < space; i += 1) {
                indent += ' ';
            }

        } else if (typeof space === 'string') {
            indent = space;
        }

        rep = replacer;
        if (replacer && typeof replacer !== 'function' &&
				(typeof replacer !== 'object' ||
				 typeof replacer.length !== 'number')) {
            throw new Error('JSON.encode');
        }

        return this.str('', { '': value });
    },

    decode: function(text, reviver) {
        var j;
        var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

        function walk(holder, key) {
            var k, v, value = holder[key];

            if (value && typeof value === 'object') {
                for (k in value) {
                    if (Object.hasOwnProperty.call(value, k)) {
                        v = walk(value, k);
                        if (v !== undefined) {
                            value[k] = v;
                        } else {
                            delete value[k];
                        }
                    }
                }
            }
            return reviver.call(holder, key, value);
        }

        cx.lastIndex = 0;

        if (cx.test(text)) {
            text = text.replace(cx, function(a) {
                return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            });
        }

        if (/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
            j = eval('(' + text + ')');
            return typeof reviver === 'function' ? walk({ '': j }, '') : j;
        }

        throw new SyntaxError('JSON.parse');
    },

    f: function(n) {
        return n < 10 ? '0' + n : n;
    },

    DateToJSON: function(key) {
        return this.getUTCFullYear() + '-' + this.f(this.getUTCMonth() + 1) + '-' + this.f(this.getUTCDate()) + 'T' + this.f(this.getUTCHours()) + ':' + this.f(this.getUTCMinutes()) + ':' + this.f(this.getUTCSeconds()) + 'Z';
    },

    StringToJSON: function(key) {
        return this.valueOf();
    },

    quote: function(string) {
        var meta = { '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"': '\\"', '\\': '\\\\' };
        var escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

        escapable.lastIndex = 0;
        return escapable.test(string) ?
            '"' + string.replace(escapable, function(a) {
                var c = meta[a];
                return typeof c === 'string' ? c :
                    '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            }) + '"' :
            '"' + string + '"';
    },

    str: function(key, holder) {
        var indent = '', gap = '', i, k, v, length, mind = gap, partial, value = holder[key];

        if (value && typeof value === 'object') {
            switch ((typeof value)) {
                case 'date':
                    this.DateToJSON(key);
                    break;
                default:
                    this.StringToJSON(key);
                    break;
            }
        }

        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }
        switch (typeof value) {
            case 'string':
                return this.quote(value);
            case 'number':
                return isFinite(value) ? String(value) : 'null';
            case 'boolean':
            case 'null':
                return String(value);
            case 'object':
                if (!value) {
                    return 'null';
                }
                gap += indent;
                partial = [];

                if (Object.prototype.toString.apply(value) === '[object Array]') {
                    length = value.length;

                    for (i = 0; i < length; i += 1) {
                        partial[i] = this.str(i, value) || 'null';
                    }

                    v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' : '[' + partial.join(',') + ']';
                    gap = mind;
                    return v;
                }

                if (rep && typeof rep === 'object') {
                    length = rep.length;
                    for (i = 0; i < length; i += 1) {
                        k = rep[i];
                        if (typeof k === 'string') {
                            v = this.str(k, value);
                            if (v) {
                                partial.push(this.quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                } else {
                    for (k in value) {
                        if (Object.hasOwnProperty.call(value, k)) {
                            v = this.str(k, value);
                            if (v) {
                                partial.push(this.quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                }

                v = partial.length === 0 ? '{}' :
					gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
							mind + '}' : '{' + partial.join(',') + '}';
                gap = mind;
                return v;
        }
    }
};