feat: add server state and signaling readiness

src/bin/client.rs

@@ -26,6 +26,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             buffer = String::from("A").repeat(1024 * 1024 * 2);
         }
 
+        if buffer == "/ready\n" {
+            buffer.clear();
+            client.signal_readiness().await;
+            continue;
+        }
+
         client.send_text_message(buffer.clone()).await;
         buffer.clear();
     }

src/network/client.rs

@@ -6,7 +6,7 @@ use tokio::sync::mpsc::{self, Receiver, Sender};
 use crate::network::{
     connection::{Connection, ConnectionType},
     message::{
-        ClientMessage::{self, TextMessage},
+        ClientMessage::{self, SignalReadiness, TextMessage},
         Message, ServerMessage,
     },
 };
@@ -80,7 +80,10 @@ impl Client {
                             let _ = sender.send(msg.unwrap()).await;
                         }
                         ServerMessage::AcceptHandshake { player_id } => todo!(),
-                        ServerMessage::DeclineHandshake { reason } => todo!(),
+                        ServerMessage::DeclineHandshake { reason } => {
+                            error!("Server declined connection: {}", reason);
+                            break;
+                        }
                         ServerMessage::AvailableCaptures { captures } => todo!(),
                         ServerMessage::AvailableMoves { moves } => todo!(),
                         ServerMessage::BroadcastBoardState { board } => todo!(),
@@ -96,10 +99,17 @@ impl Client {
     }
 
     pub async fn send_text_message(&mut self, content: String) {
+        debug!("Seding text message: {}", content);
         let msg = Message::new(TextMessage(content));
         self.send_message(msg).await;
     }
 
+    pub async fn signal_readiness(&mut self) {
+        debug!("Signaling readiness!");
+        let msg = Message::new(SignalReadiness);
+        self.send_message(msg).await;
+    }
+
     async fn send_message(&mut self, msg: Result<Message<ClientMessage>, postcard::Error>) {
         debug!("Sending message to the server!");
         let _ = match msg {

src/network/message.rs

@@ -50,6 +50,7 @@ pub enum ServerMessage {
 #[derive(Deserialize, Serialize, Debug, PartialEq, Eq, Clone)]
 pub enum ClientMessage {
     AnswerHandshake { player_name: String },
+    SignalReadiness,
 
     RequestCapture { capture_path: CapturePath },
     RequestMove { from: Position, to: Position },

src/network/server.rs

@@ -26,6 +26,27 @@ pub struct ServerSettings {
     pub allow_spectators: bool,
 }
 
+#[derive(PartialEq)]
+enum ServerStage {
+    Lobby,
+    Game,
+    End,
+}
+
+struct ServerState {
+    ready_count: usize,
+    stage: ServerStage,
+}
+
+impl Default for ServerState {
+    fn default() -> Self {
+        Self {
+            ready_count: 0,
+            stage: ServerStage::Lobby,
+        }
+    }
+}
+
 pub struct Server {
     listener: Option<TcpListener>,
     connections: HashMap<SocketAddr, Sender<Message<ServerMessage>>>,
@@ -37,6 +58,8 @@ pub struct Server {
 
     game_master: Option<GameMaster>,
     settings: ServerSettings,
+
+    state: ServerState,
 }
 
 impl Server {
@@ -65,6 +88,7 @@ impl Server {
             welcoming_reciever: None,
             game_master: None,
             settings,
+            state: ServerState::default(),
         }
     }
 
@@ -109,9 +133,13 @@ impl Server {
             tokio::select! {
                 new_client_opt = self.welcoming_reciever.as_mut().expect("Welcoming reciever was not set. Was the server started?").recv() => {
                     if let Some((addr, sender)) = new_client_opt {
-                        // TODO! Check size options etc
+                        if self.state.stage == ServerStage::Lobby && self.connections.keys().len() < self.settings.max_connections && !self.settings.allow_spectators {
                             self.connections.insert(addr, sender);
                             self.request_handshake(addr).await;
+                        } else {
+                            let msg = Message::new(ServerMessage::DeclineHandshake { reason: "There is currently game going and it doesn't allow spectators".to_string() });
+                            self.send_message(addr, msg).await;
+                        }
                     } else {
                         warn!("Welcoming reciever closed!");
                         break;
@@ -126,12 +154,24 @@ impl Server {
                                 ClientMessage::AnswerHandshake { player_name } => {
                                     self.process_handshake(addr, player_name);
                                 }
+
+                                ClientMessage::SignalReadiness => {
+                                    self.state.ready_count += 1;
+                                    info!("{} signaled readiness. Currently ready: {}/{}", addr, self.state.ready_count, self.settings.max_connections);
+                                    if self.state.ready_count == self.settings.max_connections {
+                                        info!("All players are ready! Changing state to ServerStage::Game");
+                                        self.state.stage = ServerStage::Game;
+                                    }
+                                },
+
                                 ClientMessage::RequestCapture { capture_path: _ } => {
                                     self.process_capture();
                                 }
+
                                 ClientMessage::RequestMove { from: _, to: _ } => {
                                     self.process_move();
                                 }
+
                                 ClientMessage::TextMessage (content) => {
                                     info!("{} sent us a message: {}", addr, content);
                                 }