const Message = function() {
    let fn = null;

    return {
        send: function(text, type) {
            if (["info", "success", "error"].indexOf(type) === -1) {
                type = "info";
            }
            if (!fn) {
                return window.setTimeout(() => this.send(text, type), 50);
            }
            fn(text, type);
            return Promise.resolve();
        },
        subscribe: function(_fn) {
            fn = _fn;
        },
    };
};

export const notify = new Message();