/**
 * @author Maxime Haineault (max@centdessin.com)
 * @version0.3
 * @desc JavaScript cookie manipulation class
 * 
 */

Cookie = {

    /** Get a cookie's value
     *
     *  @param integerkeyThe 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 integerkeyThe token that will be used to retrieve the cookie
     *  @param stringvalueThe string to be stored
     *  @param integerttlTime To Live (hours)
     *  @param stringpathPath in which the cookie is effective, default is "/" (optional)
     *  @param stringdomainDomain where the cookie is effective, default is window.location.hostname (optional)
     *  @param boolean secureUse 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 integerkeyThe token that will be used to retrieve the cookie
     *  @param stringpathPath used to create the cookie (optional)
     *  @param stringdomainDomain 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 integerttlTime 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 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(';'));
	}
    }
}