567         Delegate(nick) => {

   568             let delegate_id = server.find_client(&nick).map(|c| (c.id, c.room_id));

   569             let client = &server.clients[client_id];

   570             if !(client.is_admin() || client.is_master()) {

   571                 response.add(

   572                     Warning("You're not the room master or a server admin!".to_string())

   573                         .send_self(),

   574                 )

   575             } else {

   576                 match delegate_id {

   577                     None => response.add(Warning("Player is not online.".to_string()).send_self()),

   578                     Some((id, _)) if id == client_id => response

   579                         .add(Warning("You're already the room master.".to_string()).send_self()),

   580                     Some((_, id)) if id != Some(room_id) => response

   581                         .add(Warning("The player is not in your room.".to_string()).send_self()),

   582                     Some((id, _)) => {

   583                         super::common::change_master(server, client_id, id, room_id, response);

   584                     }

   585                 }

   586             }

   587         }