misc(refactor): move Server type to its own module

src/server.rs

@@ -0,0 +1,703 @@
+use crate::{tournaments::Tournament, types::*, *};
+
+pub struct Server {
+    pub clients: Clients,
+    pub usernames: Usernames,
+    pub observers: Observers,
+    pub matches: Matches,
+    pub admin: Arc<RwLock<Option<SocketAddr>>>,
+    pub admin_password: Arc<String>,
+    pub tournament: WrappedTournament,
+    pub waiting_timeout: Arc<RwLock<u64>>,
+    pub demo_mode: bool,
+    pub tournament_type: String,
+}
+
+impl Server {
+    pub fn new(admin_password: String, demo_mode: bool, tournament_type: String) -> Server {
+        Server {
+            clients: Arc::new(RwLock::new(HashMap::new())),
+            usernames: Arc::new(RwLock::new(HashMap::new())),
+            observers: Arc::new(RwLock::new(HashMap::new())),
+            matches: Arc::new(RwLock::new(HashMap::new())),
+            admin: Arc::new(RwLock::new(None)),
+            admin_password: Arc::new(admin_password),
+            tournament: Arc::new(RwLock::new(None)),
+            waiting_timeout: Arc::new(RwLock::new(5000)),
+            demo_mode,
+            tournament_type,
+        }
+    }
+
+    // Handler for CONNECT:<username>
+    pub async fn handle_connect(
+        &self,
+        addr: SocketAddr,
+        tx: UnboundedSender<Message>,
+        requested_username: String,
+    ) -> Result<(), anyhow::Error> {
+        if requested_username.is_empty() {
+            return Err(anyhow::anyhow!(format!(
+                "ERROR:INVALID:ID:{}",
+                requested_username
+            )));
+        }
+
+        let clients_guard = self.clients.read().await;
+        for client in clients_guard.values() {
+            if requested_username == client.read().await.username {
+                return Err(anyhow::anyhow!(format!(
+                    "ERROR:INVALID:ID:{}",
+                    requested_username
+                )));
+            }
+        }
+
+        drop(clients_guard);
+
+        // not taken
+        self.observers.write().await.remove(&addr);
+        self.usernames.write().await.insert(requested_username.clone(), addr);
+        self.clients.write().await.insert(
+            addr.to_string().parse()?,
+            Arc::new(RwLock::new(Client::new(
+                requested_username,
+                tx.clone(),
+                addr.to_string().parse()?,
+            ))),
+        );
+
+        let _ = crate::send(&tx, "CONNECT:ACK");
+        Ok(())
+    }
+
+    // Handler for READY
+    pub async fn handle_ready(
+        &self,
+        addr: SocketAddr,
+        tx: UnboundedSender<Message>,
+    ) -> Result<(), anyhow::Error> {
+        let clients_guard = self.clients.read().await;
+        if clients_guard.get(&addr).is_none() {
+            return Err(anyhow::anyhow!("ERROR:INVALID"));
+        }
+
+        if clients_guard.get(&addr).unwrap().read().await.ready {
+            return Err(anyhow::anyhow!("ERROR:INVALID"));
+        }
+
+        let mut client = clients_guard.get(&addr).unwrap().write().await;
+        client.ready = true;
+        let _ = crate::send(&tx, "READY:ACK");
+
+        if self.demo_mode {
+            let match_id: u32 = crate::gen_match_id(&self.matches).await;
+            let new_match = Arc::new(RwLock::new(Match::new(
+                match_id,
+                addr.to_string().parse()?,
+                addr.to_string().parse()?,
+            )));
+            self.matches.write().await.insert(match_id, new_match.clone());
+            client.ready = false;
+            client.current_match = Some(match_id);
+            client.color = Color::Red;
+            let _ = crate::send(&tx, "GAME:START:1");
+        }
+
+        Ok(())
+    }
+
+    // Handler for PLAY (column already parsed)
+    pub async fn handle_play(
+        &self,
+        addr: SocketAddr,
+        tx: UnboundedSender<Message>,
+        column: usize,
+    ) -> Result<(), anyhow::Error> {
+        let clients_guard = self.clients.read().await;
+        let client_opt = clients_guard.get(&addr);
+
+        // Check if client is valid
+        if client_opt.is_none() || client_opt.unwrap().read().await.current_match.is_none() {
+            return Err(anyhow::anyhow!("ERROR:INVALID:MOVE"));
+        }
+        let client = client_opt.unwrap().read().await;
+
+        let matches_guard = self.matches.read().await;
+        let current_match = matches_guard.get(&client.current_match.unwrap()).unwrap().read().await;
+
+        let opponent_addr = if addr == current_match.player1 {
+            current_match.player2
+        } else {
+            current_match.player1
+        };
+
+        let opponent_connection = if addr == current_match.player1 {
+            clients_guard.get(&current_match.player2).unwrap().read().await.connection.clone()
+        } else {
+            clients_guard.get(&current_match.player1).unwrap().read().await.connection.clone()
+        };
+
+        let opponent_username = if addr == current_match.player1 {
+            clients_guard.get(&current_match.player2).unwrap().read().await.username.clone()
+        } else {
+            clients_guard.get(&current_match.player1).unwrap().read().await.username.clone()
+        };
+
+        // Check if it's their move
+        let mut invalid = false;
+        if (current_match.ledger.is_empty() && current_match.player1 != addr)
+            || (current_match.ledger.last().is_some()
+                && current_match.ledger.last().unwrap().0 == client.color)
+        {
+            let _ = crate::send(&tx, "ERROR:INVALID:MOVE");
+            invalid = true;
+        }
+
+        drop(current_match);
+        drop(matches_guard);
+
+        let mut matches_guard = self.matches.write().await;
+        let mut current_match =
+            matches_guard.get_mut(&client.current_match.unwrap()).unwrap().write().await;
+
+        // Check if valid move
+        if column >= 7 && !invalid {
+            let _ = crate::send(&tx, "ERROR:INVALID:MOVE");
+            invalid = true;
+        }
+
+        if current_match.board[column][5] != Color::None && !invalid {
+            let _ = crate::send(&tx, "ERROR:INVALID:MOVE");
+            invalid = true;
+        }
+
+        // Terminate games if a player makes an invalid move
+        if invalid {
+            let current_match_id = current_match.id;
+            let viewers = current_match.viewers.clone();
+
+            drop(current_match);
+            drop(matches_guard);
+            drop(client);
+            drop(clients_guard);
+
+            if self.demo_mode {
+                self.terminate_match(current_match_id).await;
+                tx.send(Message::Close(None))?;
+            } else {
+                let _ = crate::send(&tx, "GAME:LOSS");
+                let _ = crate::send(&opponent_connection, "GAME:WINS");
+                self.broadcast_message(&viewers, &format!("GAME:WIN:{}", opponent_username)).await;
+
+                let mut clients_guard = self.clients.write().await;
+                let mut client = clients_guard.get_mut(&addr).unwrap().write().await;
+                client.current_match = None;
+                client.color = Color::None;
+                drop(client);
+
+                let mut opponent = clients_guard.get_mut(&opponent_addr).unwrap().write().await;
+                opponent.current_match = None;
+                opponent.color = Color::None;
+                opponent.score += 1;
+                drop(opponent);
+
+                self.matches.write().await.remove(&current_match_id).unwrap();
+            }
+            return Ok(());
+        } else {
+            // Place it
+            current_match.place_token(client.color.clone(), column);
+            current_match.move_to_dispatch = (client.color.clone(), column);
+        }
+
+        // broadcast the move to viewers
+        self.broadcast_message(
+            &current_match.viewers,
+            &format!("GAME:MOVE:{}:{}", client.username, column),
+        )
+        .await;
+
+        // Check game end conditions
+        let (winner, filled) = current_match.end_game_check();
+
+        if winner != Color::None {
+            if winner == client.color {
+                let _ = crate::send(&tx, "GAME:WINS");
+                if !self.demo_mode {
+                    let _ = crate::send(&opponent_connection, "GAME:LOSS");
+                }
+                self.broadcast_message(
+                    &current_match.viewers,
+                    &format!("GAME:WIN:{}", client.username),
+                )
+                .await;
+            } else {
+                let _ = crate::send(&tx, "GAME:LOSS");
+                if !self.demo_mode {
+                    let _ = crate::send(&opponent_connection, "GAME:WINS");
+                }
+                self.broadcast_message(
+                    &current_match.viewers,
+                    &format!("GAME:WIN:{}", opponent_username),
+                )
+                .await;
+            }
+        } else if filled {
+            let _ = crate::send(&tx, "GAME:DRAW");
+            if !self.demo_mode {
+                let _ = crate::send(&opponent_connection, "GAME:DRAW");
+            }
+            self.broadcast_message(&current_match.viewers, "GAME:DRAW").await;
+        }
+
+        // remove match from matchmaker
+        if winner != Color::None || filled {
+            let current_match_id = current_match.id;
+
+            drop(client);
+            drop(current_match);
+            drop(clients_guard);
+
+            let clients_guard = self.clients.read().await;
+            let mut client = clients_guard.get(&addr).unwrap().write().await;
+            if client.color == winner {
+                client.score += 1;
+            }
+            client.current_match = None;
+            client.color = Color::None;
+            drop(client);
+
+            let mut opponent = clients_guard.get(&opponent_addr).unwrap().write().await;
+            if opponent.color == winner {
+                opponent.score += 1;
+            }
+            opponent.current_match = None;
+            opponent.color = Color::None;
+            drop(opponent);
+            matches_guard.remove(&current_match_id).unwrap();
+
+            if !self.demo_mode && matches_guard.is_empty() {
+                drop(matches_guard);
+                drop(clients_guard);
+
+                let mut tournament_guard = self.tournament.write().await;
+                let tourney = tournament_guard.as_mut().unwrap();
+                tourney.write().await.next(&self).await;
+                if tourney.read().await.is_completed() {
+                    *tournament_guard = None;
+                }
+            }
+
+            return Ok(());
+        }
+
+        let connection_to_send = if !self.demo_mode {
+            opponent_connection.clone()
+        } else {
+            tx.clone()
+        };
+        let column_to_use = if !self.demo_mode {
+            column
+        } else {
+            crate::random_move(&current_match.board)
+        };
+        if self.demo_mode {
+            let move_to_dispatch = current_match.move_to_dispatch.clone();
+            current_match.ledger.push(move_to_dispatch);
+            current_match.move_to_dispatch = (Color::Yellow, column_to_use);
+            current_match.place_token(Color::Yellow, column_to_use);
+        }
+
+        let waiting =
+            *self.waiting_timeout.read().await as i64 + (rand::rng().random_range(0..=50) - 25);
+        let matches_move = self.matches.clone();
+        let observers_move = self.observers.clone();
+        let match_id_move = current_match.id;
+        let demo_mode_move = self.demo_mode;
+        current_match.wait_thread = Some(tokio::spawn(async move {
+            tokio::time::sleep(tokio::time::Duration::from_millis(waiting as u64)).await;
+
+            let mut matches_guard = matches_move.write().await;
+            let mut current_match = matches_guard.get_mut(&match_id_move).unwrap().write().await;
+            let move_to_dispatch = current_match.move_to_dispatch.clone();
+            current_match.ledger.push(move_to_dispatch);
+            current_match.move_to_dispatch = (Color::None, 0);
+
+            if demo_mode_move {
+                crate::broadcast_message(
+                    &observers_move,
+                    &current_match.viewers,
+                    &format!("GAME:MOVE:{}:{}", "demo", column_to_use),
+                )
+                .await;
+            }
+
+            drop(current_match);
+            drop(matches_guard);
+
+            let _ = crate::send(&connection_to_send, &format!("OPPONENT:{}", column_to_use));
+        }));
+
+        Ok(())
+    }
+
+    pub async fn handle_player_list(
+        &self,
+        tx: UnboundedSender<Message>,
+    ) -> Result<(), anyhow::Error> {
+        let clients_guard = self.clients.read().await;
+        let mut to_send = "PLAYER:LIST:".to_string();
+        for client_guard in clients_guard.values() {
+            let player = client_guard.read().await;
+            to_send += player.username.as_str();
+            to_send += ",";
+            to_send += if player.ready { "true" } else { "false" };
+            to_send += ",";
+            to_send += if player.current_match.is_some() {
+                "true"
+            } else {
+                "false"
+            };
+            to_send += "|";
+        }
+
+        if !to_send.ends_with(":") {
+            to_send.remove(to_send.len() - 1);
+        }
+
+        let _ = crate::send(&tx, to_send.as_str());
+        Ok(())
+    }
+
+    pub async fn handle_game_list(
+        &self,
+        tx: UnboundedSender<Message>,
+    ) -> Result<(), anyhow::Error> {
+        let matches_guard = self.matches.read().await;
+        let clients_guard = self.clients.read().await;
+        let mut to_send = "GAME:LIST:".to_string();
+        for match_guard in matches_guard.values() {
+            let a_match = match_guard.read().await;
+            let player1 = clients_guard.get(&a_match.player1).unwrap().read().await;
+            let player2 = clients_guard.get(&a_match.player2).unwrap().read().await;
+            to_send += a_match.id.to_string().as_str();
+            to_send += ",";
+            to_send += player1.username.as_str();
+            to_send += ",";
+            to_send += if player1.username == player2.username {
+                "demo"
+            } else {
+                player2.username.as_str()
+            };
+            to_send += "|";
+        }
+
+        if !to_send.ends_with(":") {
+            to_send.remove(to_send.len() - 1);
+        }
+
+        let _ = crate::send(&tx, to_send.as_str());
+        Ok(())
+    }
+
+    pub async fn handle_game_watch(
+        &self,
+        tx: UnboundedSender<Message>,
+        match_id: u32,
+        addr: SocketAddr,
+    ) -> Result<(), anyhow::Error> {
+        let result = self.watch(match_id, addr).await;
+        if result.is_err() {
+            return Err(anyhow::anyhow!("ERROR:INVALID:WATCH"));
+        }
+
+        let clients_guard = self.clients.read().await;
+        let matches_guard = self.matches.read().await;
+        let the_match = matches_guard.get(&match_id).unwrap().read().await;
+        let player1 = clients_guard.get(&the_match.player1).unwrap().read().await.username.clone();
+        let mut player2 =
+            clients_guard.get(&the_match.player2).unwrap().read().await.username.clone();
+        if self.demo_mode {
+            player2 = "demo".to_string();
+        }
+        let ledger = the_match.ledger.clone();
+
+        drop(clients_guard);
+        drop(the_match);
+        drop(matches_guard);
+
+        let mut message = format!("GAME:WATCH:ACK:{},{},{}|", match_id, player1, player2);
+
+        for a_move in ledger {
+            if a_move.0 == Color::Red {
+                message += &format!("{},{}|", player1, a_move.1);
+            } else {
+                message += &format!("{},{}|", player2, a_move.1);
+            }
+        }
+
+        message.pop();
+
+        let _ = crate::send(&tx, &message);
+        Ok(())
+    }
+
+    pub async fn handle_admin_auth(
+        &self,
+        tx: UnboundedSender<Message>,
+        addr: SocketAddr,
+        password: String,
+    ) -> Result<(), anyhow::Error> {
+        if self.admin.read().await.is_some() {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        if password != *self.admin_password {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        let mut admin_guard = self.admin.write().await;
+        *admin_guard = Some(addr.to_string().parse()?);
+        let _ = crate::send(&tx, "ADMIN:AUTH:ACK");
+        Ok(())
+    }
+
+    pub async fn handle_admin_kick(
+        &self,
+        addr: SocketAddr,
+        kick_username: String,
+    ) -> Result<(), anyhow::Error> {
+        if !self.auth_check(addr).await {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        let usernames_guard = self.usernames.read().await;
+        let clients_guard = self.clients.read().await;
+
+        let kick_addr_result = usernames_guard.get(&kick_username);
+        match kick_addr_result {
+            Some(kick_addr) => {
+                let kick_client = clients_guard.get(kick_addr).unwrap().read().await;
+                kick_client.connection.send(Message::Close(None))?;
+            }
+            None => return Err(anyhow::anyhow!("ERROR:INVALID:KICK")),
+        }
+        Ok(())
+    }
+
+    pub async fn handle_game_terminate(
+        &self,
+        addr: SocketAddr,
+        match_id: u32,
+    ) -> Result<(), anyhow::Error> {
+        if !self.auth_check(addr).await {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        self.terminate_match(match_id).await;
+
+        if !self.demo_mode && self.matches.read().await.is_empty() {
+            let mut tournament_guard = self.tournament.write().await;
+            let tourney = tournament_guard.as_mut().unwrap();
+            tourney.write().await.next(&self).await;
+            if tourney.read().await.is_completed() {
+                *tournament_guard = None;
+            }
+        }
+        Ok(())
+    }
+
+    pub async fn handle_tournament_start(
+        &self,
+        tx: UnboundedSender<Message>,
+        addr: SocketAddr,
+    ) -> Result<(), anyhow::Error> {
+        if !self.auth_check(addr).await {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        if self.tournament.read().await.is_some() || self.demo_mode {
+            return Err(anyhow::anyhow!("ERROR:INVALID:TOURNAMENT"));
+        }
+
+        let mut clients_guard = self.clients.write().await;
+        let mut ready_players = Vec::new();
+        for (client_addr, client_guard) in clients_guard.iter_mut() {
+            if client_guard.read().await.ready {
+                ready_players.push(*client_addr);
+            }
+        }
+
+        if ready_players.len() < 3 {
+            return Err(anyhow::anyhow!("ERROR:INVALID:TOURNAMENT"));
+        }
+
+        drop(clients_guard);
+
+        let mut tourney = match self.tournament_type.as_str() {
+            "round_robin" => crate::tournaments::round_robin::RoundRobin::new(&ready_players),
+            &_ => crate::tournaments::round_robin::RoundRobin::new(&ready_players),
+        };
+        tourney.start(&self).await;
+
+        let mut tournament_guard = self.tournament.write().await;
+        *tournament_guard = Some(Arc::new(RwLock::new(tourney)));
+
+        let _ = crate::send(&tx, "TOURNAMENT:START:ACK");
+        Ok(())
+    }
+
+    pub async fn handle_tournament_cancel(
+        &self,
+        tx: UnboundedSender<Message>,
+        addr: SocketAddr,
+    ) -> Result<(), anyhow::Error> {
+        if !self.auth_check(addr).await {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        if self.tournament.read().await.is_none() || self.demo_mode {
+            return Err(anyhow::anyhow!("ERROR:INVALID:TOURNAMENT"));
+        }
+
+        let mut tournament_guard = self.tournament.write().await;
+        let tourney = tournament_guard.as_mut().unwrap();
+        tourney.write().await.cancel(&self).await;
+        *tournament_guard = None;
+
+        let _ = crate::send(&tx, "TOURNAMENT:CANCEL:ACK");
+        Ok(())
+    }
+
+    pub async fn handle_tournament_wait(
+        &self,
+        addr: SocketAddr,
+        new_timeout: f64,
+    ) -> Result<(), anyhow::Error> {
+        if !self.auth_check(addr).await {
+            return Err(anyhow::anyhow!("ERROR:INVALID:AUTH"));
+        }
+
+        *self.waiting_timeout.write().await = (new_timeout * 1000.0) as u64;
+        Ok(())
+    }
+
+    pub async fn handle_get_move_wait(
+        &self,
+        tx: UnboundedSender<Message>,
+    ) -> Result<(), anyhow::Error> {
+        let mut msg = "GET:MOVE_WAIT:".to_string();
+        msg += &(*self.waiting_timeout.read().await as f64 / 1000f64).to_string();
+        let _ = crate::send(&tx, &msg);
+        Ok(())
+    }
+
+    pub async fn handle_get_tournament_status(
+        &self,
+        tx: UnboundedSender<Message>,
+    ) -> Result<(), anyhow::Error> {
+        let status = self.tournament.read().await.is_some();
+        if self.demo_mode {
+            let _ = crate::send(&tx, "GET:TOURNAMENT_STATUS:DEMO");
+        } else {
+            let mut msg = "GET:TOURNAMENT_STATUS:".to_string();
+            msg += status.to_string().as_str();
+            let _ = crate::send(&tx, &msg);
+        }
+        Ok(())
+    }
+
+    pub async fn watch(&self, new_match_id: u32, addr: SocketAddr) -> Result<(), String> {
+        let matches_guard = self.matches.read().await;
+
+        for match_guard in matches_guard.values() {
+            let mut found = false;
+            let mut a_match = match_guard.write().await;
+            for i in 0..a_match.viewers.len() {
+                if a_match.viewers[i] == addr {
+                    a_match.viewers.remove(i);
+                    found = true;
+                    break;
+                }
+            }
+
+            if found {
+                break;
+            }
+        }
+
+        let result = matches_guard.get(&new_match_id);
+        if result.is_none() {
+            return Err("Match not found".to_string());
+        }
+        result.unwrap().write().await.viewers.push(addr);
+
+        Ok(())
+    }
+
+    pub async fn terminate_match(&self, match_id: u32) {
+        let matches_guard = self.matches.read().await;
+        let the_match = matches_guard.get(&match_id);
+        if the_match.is_none() {
+            error!(
+                "Tried to call terminate_match on invalid matchID: {}",
+                match_id
+            );
+        }
+        let the_match = the_match.unwrap().read().await;
+
+        if the_match.wait_thread.is_some() {
+            the_match.wait_thread.as_ref().unwrap().abort();
+        }
+
+        self.broadcast_message(&the_match.viewers, "GAME:TERMINATED").await;
+
+        let clients_guard = self.clients.read().await;
+        let mut player1 = clients_guard.get(&the_match.player1).unwrap().write().await;
+        let _ = send(&player1.connection, "GAME:TERMINATED");
+        player1.current_match = None;
+        player1.color = Color::None;
+        drop(player1);
+
+        if !self.demo_mode {
+            let mut player2 = clients_guard.get(&the_match.player2).unwrap().write().await;
+            let _ = send(&player2.connection, "GAME:TERMINATED");
+            player2.current_match = None;
+            player2.color = Color::None;
+            drop(player2);
+        }
+
+        drop(clients_guard);
+
+        drop(the_match);
+        drop(matches_guard);
+
+        self.matches.write().await.remove(&match_id);
+    }
+
+    pub async fn broadcast_message(&self, addrs: &Vec<SocketAddr>, msg: &str) {
+        for addr in addrs {
+            let observers_guard = self.observers.read().await;
+            let tx = observers_guard.get(addr);
+            if tx.is_none() {
+                continue;
+            }
+            let _ = send(tx.unwrap(), msg);
+        }
+    }
+
+    pub async fn broadcast_message_all_observers(&self, msg: &str) {
+        let observers_guard = self.observers.read().await;
+        for (_, tx) in observers_guard.iter() {
+            let _ = send(tx, msg);
+        }
+    }
+
+    pub async fn auth_check(&self, addr: SocketAddr) -> bool {
+        if self.admin.read().await.is_none() || self.admin.read().await.unwrap() != addr {
+            return false;
+        }
+        true
+    }
+}