Can notify a player that the server is waiting for opponent play configuration

rust/sea_battle_backend/src/bot_player.rs

@@ -58,6 +58,8 @@ impl Player for BotPlayer {
         unreachable!()
     }
 
+    fn waiting_for_opponent_boats_layout(&self) {}
+
     fn notify_other_player_ready(&self) {}
 
     fn notify_game_starting(&self) {}

rust/sea_battle_backend/src/game.rs

@@ -22,6 +22,8 @@ pub trait Player {
 
     fn rejected_boats_layout(&self, errors: Vec<&'static str>);
 
+    fn waiting_for_opponent_boats_layout(&self);
+
     fn notify_other_player_ready(&self);
 
     fn notify_game_starting(&self);
@@ -294,6 +296,8 @@ impl Handler<SetBoatsLayout> for Game {
         if self.map_0.is_some() && self.map_1.is_some() {
             self.players.iter().for_each(|p| p.notify_game_starting());
             self.start_fire_exchanges();
+        } else {
+            self.players[player_index].waiting_for_opponent_boats_layout();
         }
     }
 }

rust/sea_battle_backend/src/human_player.rs

@@ -47,6 +47,11 @@ impl Player for HumanPlayer {
         });
     }
 
+    fn waiting_for_opponent_boats_layout(&self) {
+        self.player
+            .do_send(ServerMessage::WaitingForOtherPlayerConfiguration);
+    }
+
     fn notify_other_player_ready(&self) {
         self.player.do_send(ServerMessage::OpponentReady);
     }