Allow to autologin into nested interpreter

[jcubic]

I have an idea for a new feature for jQuery Terminal

When you have a nested interpreter that has login there is no way to autologic and no way to get the token and username for the interpreter that waits for authentication.

term.push(function(command) {

}, {
    login(user, password) {
         // ...
    }
});

There should be a way to skip the login when there are token and username is localstorage. But there should be a way to validate if token is valid first.

Possible solution:

term.push(function(command) {

}, {
    autologin(user, token) {
         // verify that the token is valid
         // and return a boolean or promise that resolves to boolean
    },
    login(user, password) {
         // ...
    }
});

[jcubic]

This is actually not needed, you can use:

 $('body').terminal(function(command, term) {
     
 }, {
     onBeforeLogin(user, token) {
         if (this.get_token() === token) {
             return false;
         }
     },
     login(user, password, cb) {
         return Promise.resolve('__TOKEN__');
     }
 });

onBeforeLogin execute after the user type user and password or before autologin.

But there was one problem that onBeforeLogin was supporting async call, so you were not able to return a promise and call the server to verify that the token was valid.

[jcubic]

Also, note that autologin happens automagically when refreshing the page and the interpreter has a token in localStorage.