/*
Class: Cookie
    Class for creating, getting, and removing cookies.
*/

var Cookie = new Abstract({

    options: {
        domain: false,
        path: false,
        duration: false,
        secure: false
    },

    /*
    Property: set
        Sets a cookie in the browser.

    Arguments:
        key - the key (name) for the cookie
        value - the value to set, cannot contain semicolons
        options - an object representing the Cookie options. See Options below. Default values are stored in Cookie.options.

    Options:
        domain - the domain the Cookie belongs to. If you want to share the cookie with pages located on a different domain, you have to set this value. Defaults to the current domain.
        path - the path the Cookie belongs to. If you want to share the cookie with pages located in a different path, you have to set this value, for example to "/" to share the cookie with all pages on the domain. Defaults to the current path.
        duration - the duration of the Cookie before it expires, in days.
                    If set to false or 0, the cookie will be a session cookie that expires when the browser is closed. This is default.
        secure - Stored cookie information can be accessed only from a secure environment.

    Returns:
        An object with the options, the key and the value. You can give it as first parameter to Cookie.remove.

    Example:
        >Cookie.set('username', 'Harald'); // session cookie (duration is false), or ...
        >Cookie.set('username', 'JackBauer', {duration: 1}); // save this for 1 day

    */

    set: function(key, value, options){
        options = $merge(this.options, options);
        value = encodeURIComponent(value);
        if (options.domain) value += '; domain=' + options.domain;
        if (options.path) value += '; path=' + options.path;
        if (options.duration){
            var date = new Date();
            date.setTime(date.getTime() + options.duration * 24 * 60 * 60 * 1000);
            value += '; expires=' + date.toGMTString();
        }
        if (options.secure) value += '; secure';
        document.cookie = key + '=' + value;
        return $extend(options, {'key': key, 'value': value});
    },

    /*
    Property: get
        Gets the value of a cookie.

    Arguments:
        key - the name of the cookie you wish to retrieve.

    Returns:
        The cookie string value, or false if not found.

    Example:
        >Cookie.get("username") //returns JackBauer
    */

    get: function(key){
        var value = document.cookie.match('(?:^|;)\\s*' + key.escapeRegExp() + '=([^;]*)');
        return value ? decodeURIComponent(value[1]) : false;
    },

    /*
    Property: remove
        Removes a cookie from the browser.

    Arguments:
        cookie - the name of the cookie to remove or a previous cookie (for domains)
        options - optional. you can also pass the domain and path here. Same as options in <Cookie.set>

    Examples:
        >Cookie.remove('username') //bye-bye JackBauer, cya in 24 hours
        >
        >var myCookie = Cookie.set('username', 'Aaron', {domain: 'mootools.net'}); // Cookie.set returns an object with all values need to remove the cookie
        >Cookie.remove(myCookie);
    */

    remove: function(cookie, options){
        if ($type(cookie) == 'object') this.set(cookie.key, '', $merge(cookie, {duration: -1}));
        else this.set(cookie, '', $merge(options, {duration: -1}));
    }

});