/**
 * @author 	Maxime Haineault (max@centdessin.com)
 * @version	0.3
 * @desc 	JavaScript cookie manipulation class
 * 
 */

Cookie = {

	/** Get a cookie's value
	 *
	 *  @param integer	key		The token used to create the cookie
	 *  @return void
	 */
	get					: function(key)
	{
		// Still not sure that "[a-zA-Z0-9.()=|%/]+($|;)" match *all* allowed characters in cookies
		tmp = document.cookie.match((new RegExp(key + '=[a-zA-Z0-9.()=|%/]+($|;)', 'g')));
		if (!tmp || !tmp[0]) return null;
		else return unescape(tmp[0].substring(key.length + 1, tmp[0].length).replace(';', '')) || null;

	},

	/** Set a cookie
	 *
	 *  @param integer	key		The token that will be used to retrieve the cookie
	 *  @param string	value	The string to be stored
	 *  @param integer	ttl		Time To Live (hours)
	 *  @param string	path	Path in which the cookie is effective, default is "/" (optional)
	 *  @param string	domain	Domain where the cookie is effective, default is window.location.hostname (optional)
	 *  @param boolean 	secure	Use SSL or not, default false (optional)
	 * 
	 *  @return setted cookie
	 */
	set					: function(key, value, ttl, path, domain, secure)
	{
		cookie = [key + '=' + escape(value), 'path=' + ((!path || path == '') ? '/' : path), 'domain=' + ((!domain || domain == '') ? window.location.hostname : domain)];

		if (ttl) cookie.push(Cookie.hoursToExpireDate(ttl));
		if (secure) cookie.push('secure');
		return document.cookie = cookie.join('; ');
	},

	/** Unset a cookie
	 *
	 *  @param integer	key		The token that will be used to retrieve the cookie
	 *  @param string	path	Path used to create the cookie (optional)
	 *  @param string	domain	Domain used to create the cookie, default is null (optional)
	 *  @return void
	 */
	unset				: function(key, path, domain)
	{
		path = (!path || typeof path != 'string') ? '' : path;
		domain = (!domain || typeof domain != 'string') ? '' : domain;
		if (Cookie.get(key)) Cookie.set(key, '', 'Thu, 01-Jan-70 00:00:01 GMT', path, domain);
	},

	/** Return GTM date string of "now" + time to live
	 *
	 *  @param integer	ttl		Time To Live (hours)
	 *  @return string
	 */
	hoursToExpireDate	: function(ttl)
	{
		if (parseInt(ttl) == 'NaN') return '';
		else
		{
			now = new Date();
			now.setTime(now.getTime() + (parseInt(ttl) * 60 * 60 * 1000));
			return 'expires=' + now.toGMTString();
		}
	},

	/** Return true if cookie functionnalities are available
	 *
	 *  @return boolean
	 */
	test				: function()
	{
		Cookie.set('b49f729efde9b2578ea9f00563d06e57', 'true');
		if (Cookie.get('b49f729efde9b2578ea9f00563d06e57') == 'true')
		{
			Cookie.unset('b49f729efde9b2578ea9f00563d06e57');
			return true;
		}
		return false;
	},

	/** If Firebug JavaScript console is present, it will dump cookie string to console.
	 * 
	 *  @return void
	 */
	dump				: function()
	{
		if (typeof console != 'undefined')
		{
			console.log(document.cookie.split(';'));
		}
	}
}