cookie.js

function escapeRegExp(str){
    return str.replace(/([-.*+?^${}()|[\]\/\\])/g,"\\$1")
}

var 

default_options = {
    path: '/',
    domain: false,
    duration: false,
    secure: false,
    document: document,
    encode: true
},

Cookie = NR.Class({

    Implements: 'attrs',
    initialize: function (key, options) {
        this.key = key;            
        this.set({ opt: options });
    },
    write: function (value) {
        var o = this.get('opt');

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

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

    dispose: function () {
        new Cookie(this.key, NR.mix({ duration: -1 },this.get('opt'), false)).write('');
        return this;
    }

}, {
    opt: {
        value: default_options,
        setter: function (v) {
            return NR.mix(v || {},this.get('opt'),false);
        }
    }
});

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();
};

module.exports = Cookie;