/**
 * Misc lib
 */
String.prototype.urldecode = function() {
	return unescape(this.replace(/\+/g, " "));
}

/**
 * Javascript code to store data as JSON strings in cookies. 
 * It uses prototype.js 1.5.1 (http://www.prototypejs.org)
 * 
 * Author : Lalit Patel
 * Website: http://www.lalit.org/lab/jsoncookies
 * License: Creative Commons Attribution-ShareAlike 2.5
 *          http://creativecommons.org/licenses/by-sa/2.5/
 * Version: 0.4
 * Updated: Aug 11, 2007 10:09am
 * 
 * Chnage Log:
 *   v 0.4
 *   -  Removed a extra comma in options (was breaking in IE and Opera). (Thanks Jason)
 *   -  Removed the parameter name from the initialize function
 *   -  Changed the way expires date was being calculated. (Thanks David)
 *   v 0.3
 *   -  Removed dependancy on json.js (http://www.json.org/json.js)
 *   -  empty() function only deletes the cookies set by CookieJar
 */

var CookieJar = Class.create();

CookieJar.prototype = {

	/**
	 * Append before all cookie names to differntiate them.
	 */
	appendString: "__CJ_",

	/**
	 * Initializes the cookie jar with the options.
	 */
	initialize: function(options) {
		this.options = {
			expires: 3600,		// seconds (1 hr)
			path: '',			// cookie path
			domain: '',			// cookie domain
			secure: ''			// secure ?
		};
		Object.extend(this.options, options || {});

		if (this.options.expires != '') {
			var date = new Date();
			date = new Date(date.getTime() + (this.options.expires * 1000));
			this.options.expires = '; expires=' + date.toGMTString();
		}
		if (this.options.path != '') {
			this.options.path = '; path=' + escape(this.options.path);
		}
		if (this.options.domain != '') {
			this.options.domain = '; domain=' + escape(this.options.domain);
		}
		if (this.options.secure == 'secure') {
			this.options.secure = '; secure';
		} else {
			this.options.secure = '';
		}
	},

	/**
	 * Adds a name values pair.
	 */
	put: function(name, value) {
		name = this.appendString + name;
		cookie = this.options;
		var type = typeof value;
		switch(type) {
		  case 'undefined':
		  case 'function' :
		  case 'unknown'  : return false;
		  case 'boolean'  : 
		  case 'string'   : 
		  case 'number'   : value = String(value.toString());
		}
		var cookie_str = name + "=" + escape(Object.toJSON(value));
		try {
			document.cookie = cookie_str + cookie.expires + cookie.path + cookie.domain + cookie.secure;
		} catch (e) {
			return false;
		}
		return true;
	},

	/**
	 * Removes a particular cookie (name value pair) form the Cookie Jar.
	 */
	remove: function(name) {
		name = this.appendString + name;
		cookie = this.options;
		try {
			var date = new Date();
			date.setTime(date.getTime() - (3600 * 1000));
			var expires = '; expires=' + date.toGMTString();
			document.cookie = name + "=" + expires + cookie.path + cookie.domain + cookie.secure;
		} catch (e) {
			return false;
		}
		return true;
	},

	/**
	 * Return a particular cookie by name;
	 */
	get: function(name) {
		name = this.appendString + name;
		var cookies = document.cookie.match(name + '=(.*?)(;|$)');
		if (cookies) {
			return (unescape(cookies[1])).evalJSON();
		} else {
			return null;
		}
	},

	/**
	 * Empties the Cookie Jar. Deletes all the cookies.
	 */
	empty: function() {
		keys = this.getKeys();
		size = keys.size();
		for(i=0; i<size; i++) {
			this.remove(keys[i]);
		}
	},

	/**
	 * Returns all cookies as a single object
	 */
	getPack: function() {
		pack = {};
		keys = this.getKeys();

		size = keys.size();
		for(i=0; i<size; i++) {
			pack[keys[i]] = this.get(keys[i]);
		}
		return pack;
	},

	/**
	 * Returns all keys.
	 */
	getKeys: function() {
		keys = $A();
		keyRe= /[^=; ]+(?=\=)/g;
		str  = document.cookie;
		CJRe = new RegExp("^" + this.appendString);
		while((match = keyRe.exec(str)) != undefined) {
			if (CJRe.test(match[0].strip())) {
				keys.push(match[0].strip().gsub("^" + this.appendString,""));
			}
		}
		return keys;
	}
};






/**
 * @see http://blog.ninedays.org/2008/01/17/limit-characters-in-a-textarea-with-prototype/
 */
function charCounter(id, maxlimit){
	if (!$('counter-'+id)){
		$(id).insert({after: '<div id="counter-'+id+'"></div>'});
	}
	if($F(id).length >= maxlimit){
		$(id).value = $F(id).substring(0, maxlimit);
		$('counter-'+id).addClassName('charcount-limit');
		$('counter-'+id).removeClassName('charcount-safe');
	} else {	
		$('counter-'+id).removeClassName('charcount-limit');
		$('counter-'+id).addClassName('charcount-safe');
	}
	$('counter-'+id).update( $F(id).length + '/' + maxlimit );	
		
}

function makeItCount(id, maxsize){
	if ($(id)){
		Event.observe($(id), 'keyup', function(){charCounter(id, maxsize);}, false);
		Event.observe($(id), 'keydown', function(){charCounter(id, maxsize);}, false);
		charCounter(id,maxsize);
	}
}

Array.prototype.sum = function(){
	for(var i=0,sum=0;i<this.length;sum+=this[i++]);
	return sum;
}

Prototype.Browser.Version = Prototype.Browser.Version || {};
Prototype.Browser.Version.IE = parseInt(navigator.userAgent.substring(navigator.userAgent.indexOf("MSIE")+5));