To do this, I used generic-type-guard package which generates both an interface AND a valid type guard from code.
With this, we are 100% sure that the messages we receive are validated at runtime!
The client cannot pass us an object that is invalid! \o/
Now, when a user moves, only his/her position is sent back to the other users. The position of all users is not sent each time.
The messages sent to the browser are now:
- the list of all users as a return to the join_room event (you can send responses to events in socket.io)
- a "join_room" event sent when a new user joins the room
- a "user_moved" event when a user moved
- a "user_left" event when a user left the room
The GameScene tracks all these events and reacts accordingly.
Also, I made a number of refactoring in the classes and removed the GameSceneInterface that was useless (it was implemented by the LogincScene for no reason at all)
searchClientById was scanning through all open sockets to find the right one (which is inefficient if we have many).
Instead, I created a new Map that directly maps ids to sockets.
Furthermore, this solves a long-standing issue (when a socket is disconnected, we cannot find it anymore in the sockets list but it is still available in the disconnect callback from the map)
As a result, we should not have any remaining circles any more.
Previously, userid was generated by the "/login" route and passed along.
This commit completely removes the uuid "userid" (and disables the LoginController too and any Jwt check).
"userid" is replaced by the "socket id" of the connection.
So a user is now identified using a socket id, which is unique for a given connection.
So far, someone joining a map would not see the circles of groups already formed until someone moves in the group (because the "circle_moved_or_updated" event was not fired when someone arrives)
This commit fixes this behaviour. Someone entering a room will receive an event for each and every group currently formed.
