io.on('connection', function(socket) {
  console.log('@@ client connected',socket.id);

  socket.emit('user.list', { users: users });

  socket.on('search.user', (data) => {
    var filter = data.data ? data.data.toLowerCase() : "";
    var matchesFilter = new RegExp(filter, "i")
    var filtered = users.filter(user => {
      if (user.first_name.toLowerCase().includes(filter, 0) || user.last_name.toLowerCase().includes(filter, 0))
        return true;
      else
        return false;
    });
    socket.emit('user.list', { users: filtered });
  });

  socket.emit('room.joined', socket.id + ' joined the hallway');
  socket.on('room.join', function(room) {
    socket.join(room);
    io.to(room).emit('room.joined', socket.id + ' joined the ' + room);
  });
});