/**
* jQuery JSON Plugin
* version: 2.3 (2011-09-17)
*
* This document is licensed as free software under the terms of the
* MIT License: http://www.opensource.org/licenses/mit-license.php
*
* Brantley Harris wrote this plugin. It is based somewhat on the JSON.org
* website's http://www.json.org/json2.js, which proclaims:
* "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
* I uphold.
*
* It is also influenced heavily by MochiKit's serializeJSON, which is
* copyrighted 2005 by Bob Ippolito.
*/

(function ($) {

    var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
		meta = {
		    '\b': '\\b',
		    '\t': '\\t',
		    '\n': '\\n',
		    '\f': '\\f',
		    '\r': '\\r',
		    '"': '\\"',
		    '\\': '\\\\'
		};

    /**
    * jQuery.toJSON
    * Converts the given argument into a JSON respresentation.
    *
    * @param o {Mixed} The json-serializble *thing* to be converted
    *
    * If an object has a toJSON prototype, that will be used to get the representation.
    * Non-integer/string keys are skipped in the object, as are keys that point to a
    * function.
    *
    */
    $.toJSON = typeof JSON === 'object' && JSON.stringify
		? JSON.stringify
		: function (o) {

		    if (o === null) {
		        return 'null';
		    }

		    var type = typeof o;

		    if (type === 'undefined') {
		        return undefined;
		    }
		    if (type === 'number' || type === 'boolean') {
		        return '' + o;
		    }
		    if (type === 'string') {
		        return $.quoteString(o);
		    }
		    if (type === 'object') {
		        if (typeof o.toJSON === 'function') {
		            return $.toJSON(o.toJSON());
		        }
		        if (o.constructor === Date) {
		            var month = o.getUTCMonth() + 1,
					day = o.getUTCDate(),
					year = o.getUTCFullYear(),
					hours = o.getUTCHours(),
					minutes = o.getUTCMinutes(),
					seconds = o.getUTCSeconds(),
					milli = o.getUTCMilliseconds();

		            if (month < 10) {
		                month = '0' + month;
		            }
		            if (day < 10) {
		                day = '0' + day;
		            }
		            if (hours < 10) {
		                hours = '0' + hours;
		            }
		            if (minutes < 10) {
		                minutes = '0' + minutes;
		            }
		            if (seconds < 10) {
		                seconds = '0' + seconds;
		            }
		            if (milli < 100) {
		                milli = '0' + milli;
		            }
		            if (milli < 10) {
		                milli = '0' + milli;
		            }
		            return '"' + year + '-' + month + '-' + day + 'T' +
					hours + ':' + minutes + ':' + seconds +
					'.' + milli + 'Z"';
		        }
		        if (o.constructor === Array) {
		            var ret = [];
		            for (var i = 0; i < o.length; i++) {
		                ret.push($.toJSON(o[i]) || 'null');
		            }
		            return '[' + ret.join(',') + ']';
		        }
		        var name,
				val,
				pairs = [];
		        for (var k in o) {
		            type = typeof k;
		            if (type === 'number') {
		                name = '"' + k + '"';
		            } else if (type === 'string') {
		                name = $.quoteString(k);
		            } else {
		                // Keys must be numerical or string. Skip others
		                continue;
		            }
		            type = typeof o[k];

		            if (type === 'function' || type === 'undefined') {
		                // Invalid values like these return undefined
		                // from toJSON, however those object members
		                // shouldn't be included in the JSON string at all.
		                continue;
		            }
		            val = $.toJSON(o[k]);
		            pairs.push(name + ':' + val);
		        }
		        return '{' + pairs.join(',') + '}';
		    }
		};

    /**
    * jQuery.evalJSON
    * Evaluates a given piece of json source.
    *
    * @param src {String}
    */
    $.evalJSON = typeof JSON === 'object' && JSON.parse
		? JSON.parse
		: function (src) {
		    return eval('(' + src + ')');
		};

    /**
    * jQuery.secureEvalJSON
    * Evals JSON in a way that is *more* secure.
    *
    * @param src {String}
    */
    $.secureEvalJSON = typeof JSON === 'object' && JSON.parse
		? JSON.parse
		: function (src) {

		    var filtered =
			src
			.replace(/\\["\\\/bfnrtu]/g, '@')
			.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
			.replace(/(?:^|:|,)(?:\s*\[)+/g, '');

		    if (/^[\],:{}\s]*$/.test(filtered)) {
		        return eval('(' + src + ')');
		    } else {
		        throw new SyntaxError('Error parsing JSON, source is not valid.');
		    }
		};

    /**
    * jQuery.quoteString
    * Returns a string-repr of a string, escaping quotes intelligently.
    * Mostly a support function for toJSON.
    * Examples:
    * >>> jQuery.quoteString('apple')
    * "apple"
    *
    * >>> jQuery.quoteString('"Where are we going?", she asked.')
    * "\"Where are we going?\", she asked."
    */
    $.quoteString = function (string) {
        if (string.match(escapeable)) {
            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 + '"';
    };

})(jQuery);
