Sending messages client->server->client on socket.io on node.js

Question

I\'m using NodeJS+Socket.IO for simple web game. It works. Why?

Here\'s my server.js

var app = require(\'express\').createServer();
var          


        

Answer 1

Client-side. A player moves and the function movePlayer is executed:

function movePlayer () {
    socket.emit ('player move', {map: 4, coords: '0.0'});
}

socket.on ('updatePlayer', function (msg) {
    console.log ('A player moves on map ' + msg.map + ' on coords ' + msg.coords);
});

Server-side. When someone moves, a 'updatePlayer' is emitted for each socket except the original player. On each client side, the updatePlayer is intercepted.

socket.on ('player move', function (msg) {
    io.sockets.emit ('updatePlayer', msg);
});

Answer 2

Server side

socket.on('updatePlayer', function(updatePlayer){
  console.log("Someone just moved on the map!")
  updatePlayer() // will trigger the client side function
});

Client side

socket.emit('updatePlayer', function(){
  console.log('testing');
})