/*
---
script: Cookie.js
description: Class for creating, reading, and deleting browser Cookies.
license: MIT-style license.
credits:
- Based on the functions by Peter-Paul Koch (http://quirksmode.org).
requires:
- /Options
provides: [Cookie]
...
*/

var Cookie = new Class({

    Implements: Options,

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

    initialize: function(key, options) {
        this.key = key;
        this.setOptions(options);
    },

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

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

    dispose: function() {
        new Cookie(this.key, $merge(this.options, { duration: -1 })).write('');
        return this;
    }

});

Cookie.write = function(key, value, options) {
    return new Cookie(key, options).write(value);
};

Cookie.read = function(key) {
    return new Cookie(key).read();
};

Cookie.dispose = function(key, options) {
    return new Cookie(key, options).dispose();
};