How to send an alert message to a special online user with firebase

Question

I\'m trying to make a \"FourConnect\"-game with javascript. I want, that there is a list from all online users. This list I\'ve made with the example on the firebase site. N

Answer 1

From what I understand. You want a chat window in the game so that users logged to communicate among themselves, okay?

Well, in its structure, you simply add something like:

-Games
    -rooms
     -charOfRoomSpecific
         - users
            
             + InmydEpSe5oZcLZUhfU

              -InrLM6uxAsoOayOgFce
                     name: "Barbara"
                     status "away"
         
       - messages
           + InmyBlaBlae5oZcLPKSu
           -InmyBlaBlae5oZcLPKSu2
                user: "Barbara"
                say: "Hello man, will gamer!"


     + charOfRoomSpecific2
     + charOfRoomSpecific3
     ...

So, for your users in the room can read the message simply:

FirebaseRef.child ("rooms/charOfYourRoomSpecific/messages");

And everyone who has access to this room will see in real time their conversations.

Answer 2

In order to send a message to another user, you need that user to be monitoring a known location in your Firebase. Then when you want to send them a message, you simply modify that location in some way and they'll get a callback. Here's some pseudo code:

var root = new Firebase(...);

//On initialization start listening for messages
root.child("users/inbound-messages").on("child_added", 
  function(newMessageSnapshot) {
    displaySomethingToTheUser(newMessageSnapshot.val());
    newMessageSnapshot.ref().remove();
  }
);

//Send a message to another user
root.child(otherUserId).child("inbound-messages").push("Hi other user!");