/*
 * stringifyJSON
 * http://github.com/flowersinthesand/stringifyJSON
 * 
 * Copyright 2011, Donghwan Kim 
 * Licensed under the Apache License, Version 2.0
 * http://www.apache.org/licenses/LICENSE-2.0
 */
// This plugin is heavily based on Douglas Crockford's reference implementation
(function() {
	
	"use strict";
	
	var escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, 
		meta = {
			'\b' : '\\b',
			'\t' : '\\t',
			'\n' : '\\n',
			'\f' : '\\f',
			'\r' : '\\r',
			'"' : '\\"',
			'\\' : '\\\\'
		};
	
	function quote(string) {
		return '"' + string.replace(escapable, function(a) {
			var c = meta[a];
			return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
		}) + '"';
	}
	
	function f(n) {
		return n < 10 ? "0" + n : n;
	}
	
	function str(key, holder) {
		var i, v, len, partial, value = holder[key], type = typeof value;
				
		if (value && typeof value === "object" && typeof value.toJSON === "function") {
			value = value.toJSON(key);
			type = typeof value;
		}
		
		switch (type) {
		case "string":
			return quote(value);
		case "number":
			return isFinite(value) ? String(value) : "null";
		case "boolean":
			return String(value);
		case "object":
			if (!value) {
				return "null";
			}
			
			switch (Object.prototype.toString.call(value)) {
			case "[object Date]":
				return isFinite(value.valueOf()) ? 
					'"' + value.getUTCFullYear() + "-" + f(value.getUTCMonth() + 1) + "-" + f(value.getUTCDate()) + 
					"T" + f(value.getUTCHours()) + ":" + f(value.getUTCMinutes()) + ":" + f(value.getUTCSeconds()) + "Z" + '"' : 
					"null";
			case "[object Array]":
				len = value.length;
				partial = [];
				for (i = 0; i < len; i++) {
					partial.push(str(i, value) || "null");
				}
				
				return "[" + partial.join(",") + "]";
			default:
				partial = [];
				for (i in value) {
					if (Object.prototype.hasOwnProperty.call(value, i)) {
						v = str(i, value);
						if (v) {
							partial.push(quote(i) + ":" + v);
						}
					}
				}
				
				return "{" + partial.join(",") + "}";
			}
		}
	}
	
	function stringifyJSON(value) {
		if (window.JSON && window.JSON.stringify) {
			return window.JSON.stringify(value);
		}
		
		return str("", {"": value});
	}
	
	// Expose stringifyJSON to the global object
	window.stringifyJSON = stringifyJSON;
	
}());