Add: game engine and flow control

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/domain/game/GameController.java

@@ -0,0 +1,257 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.domain.game;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.action.BlindAction;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.action.CallAction;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.action.FoldAction;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.action.RaiseAction;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.deck.Card;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.deck.Deck;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.engine.GameEngine;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.evaluator.HandEvaluator;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.evaluator.HandRank;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.player.PlayerId;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.state.GamePhase;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.state.GameState;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * GameController is responsible for managing the flow of the poker game. It
+ * interacts with the GameEngine to process player actions and update the game
+ * state accordingly.
+ */
+public class GameController {
+
+    private final GameEngine engine;
+
+    private final List<PlayerId> players = new ArrayList<>();
+
+    private int dealerIndex = 0;
+
+    private static final int NEXT_PLAYER_OFFSET = 3;
+    private static final int DEALER_OFFSET = 1;
+    private static final int SMALL_BLIND_OFFSET = 1;
+    private static final int BIG_BLIND_OFFSET = 2;
+    private static final int SMALL_BLIND = 100;
+    private static final int BIG_BLIND = 200;
+
+    /**
+     * Initializes the GameController with a reference to the GameEngine.
+     *
+     * @param engine The GameEngine instance that manages the game state and logic.
+     */
+    public GameController(GameEngine engine) {
+        this.engine = engine;
+    }
+
+    /**
+     * Adds a player to the game with the specified name and initial chip count.
+     *
+     * @param name  The name of the player to add.
+     * @param chips The initial number of chips the player has.
+     */
+    public void addPlayer(PlayerId name, int chips) {
+
+        // PlayerId id = PlayerId.of(name);
+        //
+        // players.add(id);
+        // engine.getState().addPlayer(id, chips);
+
+         players.add(name);
+         engine.getState().addPlayer(name, chips);
+    }
+
+    /**
+     * Initializes a new hand by preparing the deck, setting the phase to PREFLOP,
+     * rotating the dealer, dealing hole cards, posting blinds,
+     * and setting the first active player.
+     */
+    public void startGame() {
+
+        if (engine.getState().getDeck() == null) {
+            Deck deck = new Deck();
+            deck.shuffle();
+            engine.getState().setDeck(deck);
+        }
+
+        engine.getState().setHandActive(true);
+        engine.getState().setPhase(GamePhase.PREFLOP);
+
+        rotateDealer();
+        dealHoleCards();
+        postBlinds();
+
+        int nextPlayerIndex = (dealerIndex + NEXT_PLAYER_OFFSET) % players.size();
+        engine.getState().setCurrentPlayerIndex(nextPlayerIndex);
+    }
+
+    /**
+     * Rotates the dealer position to the next player in the list.
+     */
+    private void rotateDealer() {
+        dealerIndex = (dealerIndex + DEALER_OFFSET) % players.size();
+    }
+
+    /**
+     * Returns the player currently acting as dealer.
+     *
+     * @return The name of the current dealer.
+     */
+    public PlayerId getDealer() {
+        return players.get(dealerIndex);
+    }
+
+    /**
+     * Determines the small and big blind players relative to the dealer
+     * and submits the corresponding blind actions to the engine.
+     */
+    public void postBlinds() {
+
+        PlayerId smallBlind = players.get((dealerIndex + SMALL_BLIND_OFFSET) % players.size());
+        PlayerId bigBlind = players.get((dealerIndex + BIG_BLIND_OFFSET) % players.size());
+
+        engine.processAction(new BlindAction(smallBlind, SMALL_BLIND));
+        engine.processAction(new BlindAction(bigBlind, BIG_BLIND));
+    }
+
+    /**
+     * Deals hole cards to each player from the deck.
+     */
+    public void dealHoleCards() {
+
+        Deck deck = engine.getState().getDeck();
+
+        for (PlayerId player : players) {
+
+            Card c1 = deck.draw();
+            Card c2 = deck.draw();
+
+            engine.getState().giveHoleCards(player, c1, c2);
+        }
+    }
+
+    /**
+     * Draws three cards from the deck and adds them as community cards (flop).
+     */
+    public void dealFlop() {
+
+        Deck deck = engine.getState().getDeck();
+
+        engine.getState().addCommunityCard(deck.draw());
+        engine.getState().addCommunityCard(deck.draw());
+        engine.getState().addCommunityCard(deck.draw());
+    }
+
+    /**
+     * Deals the turn by drawing one community card from the deck and adding it to
+     * the game state.
+     */
+    public void dealTurn() {
+        engine.getState().addCommunityCard(engine.getState().getDeck().draw());
+    }
+
+    /**
+     * Deals the river by drawing one community card from the deck and adding it to
+     * the game state.
+     */
+    public void dealRiver() {
+        engine.getState().addCommunityCard(engine.getState().getDeck().draw());
+    }
+
+    /**
+     * Processes a player's fold action by sending a FoldAction to the GameEngine.
+     *
+     * @param playerId The ID of the player who is folding.
+     */
+    public void playerFold(PlayerId playerId) {
+        // engine.processAction(new FoldAction(PlayerId.of(playerId)));
+        engine.processAction(new FoldAction(playerId));
+    }
+
+    /**
+     * Processes a player's call action by sending a CallAction to the GameEngine.
+     *
+     * @param playerId The ID of the player who is calling.
+     */
+    public void playerCall(PlayerId playerId) {
+        // engine.processAction(new CallAction(PlayerId.of(playerId)));
+        engine.processAction(new CallAction(playerId));
+    }
+
+    /**
+     * Processes a player's raise action by sending a RaiseAction to the GameEngine.
+     *
+     * @param playerId The ID of the player who is raising.
+     * @param amount   The amount the player is raising.
+     */
+    public void playerRaise(PlayerId playerId, int amount) {
+        // engine.processAction(new RaiseAction(PlayerId.of(playerId), amount));
+        engine.processAction(new RaiseAction(playerId, amount));
+    }
+
+    /**
+     * Retrieves the current game state from the GameEngine.
+     *
+     * @return The current GameState object representing the state of the game.
+     */
+    public GameState getState() {
+        return engine.getState();
+    }
+
+    /**
+     * Retrieves the list of community cards currently on the table.
+     *
+     * @return A list of Card objects representing the community cards.
+     */
+    public List<Card> getCommunityCards() {
+        return engine.getState().getCommunityCards();
+    }
+
+    /**
+     * Retrieves the hole cards for each player in the game.
+     *
+     * @return A map where the key is the player's name and the value is a list of
+     *         Card objects representing the player's hole cards.
+     */
+    public Map<PlayerId, List<Card>> getPlayerCards() {
+        return engine.getState().getPlayerCards();
+    }
+
+    /**
+     * Determines the winner of the current hand by evaluating the best possible
+     * poker hand for each active player.
+     *
+     * The evaluation is based on the player's two hole cards combined with the
+     * five community cards on the board.
+     *
+     * @return The ID of the winning player.
+     */
+    public PlayerId determineWinner() {
+
+        List<Card> board = engine.getState().getCommunityCards();
+        GameState state = engine.getState();
+
+        PlayerId bestPlayer = null;
+        HandRank bestRank = null;
+
+        for (PlayerId player : players) {
+
+            if (state.isFolded(player)) {
+                continue;
+            }
+
+            List<Card> cards = new ArrayList<>(board);
+            cards.addAll(state.getHoleCards(player));
+
+            HandRank rank = HandEvaluator.evaluate(cards);
+
+            if (bestRank == null || rank.compareTo(bestRank) > 0) {
+                bestRank = rank;
+                bestPlayer = player;
+            }
+        }
+
+        return bestPlayer;
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/domain/game/engine/GameEngine.java

@@ -0,0 +1,108 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.domain.game.engine;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.action.Action;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.rules.RuleEngine;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.state.GameState;
+
+/**
+ * The GameEngine class is responsible for managing the core logic of the poker
+ * game. It integrates the RuleEngine, RoundManager, and TurnManager to
+ * orchestrate the flow of the game. The GameEngine processes player actions,
+ * updates the game state accordingly, and ensures that the game progresses
+ * through its various stages (pre-flop, flop, turn, river) while adhering to
+ * the rules of poker.
+ */
+public class GameEngine {
+
+    private final RuleEngine ruleEngine;
+    private final RoundManager roundManager;
+    private final TurnManager turnManager;
+
+    private final GameState state;
+
+    /**
+     * Constructs a GameEngine with the specified game state, rule engine, round
+     * manager, and turn manager.
+     *
+     * @param state        The initial game state to be managed by the engine.
+     * @param ruleEngine   The RuleEngine instance responsible for validating player
+     *                     actions.
+     * @param roundManager The RoundManager instance responsible for managing the
+     *                     progression of rounds.
+     * @param turnManager  The TurnManager instance responsible for managing player
+     *                     turns.
+     */
+    public GameEngine(GameState state,
+            RuleEngine ruleEngine,
+            RoundManager roundManager,
+            TurnManager turnManager) {
+        this.state = state;
+        this.ruleEngine = ruleEngine;
+        this.roundManager = roundManager;
+        this.turnManager = turnManager;
+    }
+
+    /**
+     * Starts a new hand with the provided game state. This method initializes the
+     * round manager to begin a new hand and sets up the game state accordingly.
+     *
+     * @param state The game state to be used for starting the new hand.
+     */
+    public void startNewHand(GameState state) {
+        roundManager.startNewHand(state);
+    }
+
+    /**
+     * Starts a new hand using the current game state. This method is a convenience
+     * method that calls the startNewHand method with the current state of the game.
+     */
+    public void startNewHand() {
+        roundManager.startNewHand(state);
+    }
+
+    /**
+     * Processes a player action by validating it against the game rules, executing
+     * the action, progressing to the next player's turn, and checking if the
+     * round should progress to the next stage.
+     *
+     * @param action The player action to be processed.
+     */
+    public void processAction(Action action) {
+        handleAction(state, action);
+    }
+
+    /**
+     * Handles a player action by performing the following steps:
+     * 1. Validates the action against the game rules using the RuleEngine.
+     * 2. Executes the action, which updates the game state accordingly.
+     * 3. Advances to the next player's turn using the TurnManager.
+     * 4. Checks if the round should progress to the next stage (e.g., from pre-flop
+     * to flop) using the RoundManager.
+     *
+     * @param state  The current game state on which to execute the action.
+     * @param action The player action to be processed.
+     */
+    public void handleAction(GameState state, Action action) {
+
+        // 1.Check the rules
+        ruleEngine.validate(state, action);
+
+        // 2. Perform action
+        action.execute(state);
+
+        // 3. Next turn
+        turnManager.nextPlayer(state);
+
+        // 4. Check loop logic
+        roundManager.progressIfNeeded(state);
+    }
+
+    /**
+     * Retrieves the current game state managed by the GameEngine.
+     *
+     * @return The current GameState instance.
+     */
+    public GameState getState() {
+        return state;
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/domain/game/engine/RoundManager.java

@@ -0,0 +1,144 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.domain.game.engine;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.player.Player;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.player.PlayerStatus;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.state.GameState;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * RoundManager is responsible for managing the flow of a poker game round. It
+ * handles the progression of the game through its various phases (pre-flop,
+ * flop, turn, river) and manages player actions such as posting blinds and
+ * dealing cards. The RoundManager ensures that the game state is updated
+ * correctly based on player actions and the current phase of the game.
+ */
+public class RoundManager {
+
+    public static final int SMALL_BLIND = 100;
+    public static final int BIG_BLIND = 200;
+
+    /**
+     * Starts a new hand by initializing the game state, dealing cards to players,
+     * and posting blinds. This method sets the hand as active and resets any
+     * necessary state variables to prepare for a new round of play.
+     *
+     * @param state The game state to be used for starting the new hand.
+     */
+    public void startNewHand(GameState state) {
+        state.setHandActive(true);
+        state.resetBets();
+
+        dealCards(state);
+
+        postBlinds(state);
+    }
+
+    /**
+     * Checks if the betting round is finished and advances the game phase if
+     * necessary. This method evaluates the current bets of all active players and
+     * determines if the betting round can be concluded. If all players have met
+     * the current bet or are all-in, the game phase is advanced to the next stage.
+     *
+     * @param state The current game state to be evaluated for betting round
+     *              progression.
+     */
+    public void progressIfNeeded(GameState state) {
+
+        if (isBettingRoundFinished(state)) {
+            advancePhase(state);
+        }
+    }
+
+    /**
+     * Determines if the betting round is finished by checking if all active players
+     * have met the current bet or are all-in. This method iterates through all
+     * players in the game state and evaluates their bets against the current bet on
+     * the table.
+     *
+     * @param state The current game state to be evaluated for betting round
+     *              completion.
+     * @return true if the betting round is finished, false otherwise.
+     */
+    private boolean isBettingRoundFinished(GameState state) {
+
+        int target = state.getTableState().getCurrentBet();
+
+        for (Player p : state.getPlayers()) {
+
+            if (p.getStatus() == PlayerStatus.FOLDED) {
+                continue;
+            }
+
+            int bet = state.getCurrentBet(p.getId());
+
+            // The player must have placed at least one bet
+            if (bet < target && !p.isAllIn()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Advances the game phase to the next stage (flop, turn, river, or showdown)
+     * based on the current phase of the game. This method is called when the
+     * betting round is finished and updates the game state accordingly to reflect
+     * the new phase of play.
+     *
+     * @param state The current game state to be updated with the new phase.
+     */
+    private void advancePhase(GameState state) {
+
+        switch (state.getPhase()) {
+            case PREFLOP -> dealFlop(state);
+            case FLOP -> dealTurn(state);
+            case TURN -> dealRiver(state);
+            case RIVER -> showdown(state);
+        }
+    }
+
+    /**
+     * Handles the posting of blinds at the start of a new hand. This method
+     * identifies the players responsible for posting the small and big blinds,
+     * updates their chip counts, adds the blind amounts to the pot, and updates
+     * the current bets for those players in the game state.
+     *
+     * @param state The current game state to be updated with the posted blinds.
+     */
+    private void postBlinds(GameState state) {
+        List<Player> playerList = new ArrayList<>(state.getPlayers());
+
+        Player sb = playerList.get(0);
+        Player bb = playerList.get(1);
+
+        int smallBlind = SMALL_BLIND;
+        int bigBlind = BIG_BLIND;
+
+        sb.removeChips(smallBlind);
+        bb.removeChips(bigBlind);
+
+        state.addToPot(smallBlind + bigBlind);
+
+        state.setCurrentBet(sb.getId(), smallBlind);
+        state.setCurrentBet(bb.getId(), bigBlind);
+
+        state.getTableState().setCurrentBet(bigBlind);
+    }
+
+    private void dealCards(GameState state) {
+    }
+
+    private void dealFlop(GameState state) {
+    }
+
+    private void dealTurn(GameState state) {
+    }
+
+    private void dealRiver(GameState state) {
+    }
+
+    private void showdown(GameState state) {
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/domain/game/engine/TurnManager.java

@@ -0,0 +1,31 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.domain.game.engine;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.game.state.GameState;
+
+/**
+ * The TurnManager class is responsible for managing the flow of turns in a
+ * poker
+ * game. It provides functionality to determine the next player in the sequence
+ * and update the game state accordingly. The TurnManager ensures that players
+ * take their turns in the correct order, allowing for a smooth and organized
+ * gameplay experience.
+ */
+public class TurnManager {
+
+    /**
+     * Advances the game state to the next player's turn. This method calculates
+     * the index of the next player based on the current player index and the total
+     * number of players in the game. It then updates the game state to reflect
+     * the new current player.
+     *
+     * @param state The current game state that will be updated to reflect the next
+     *              player's turn.
+     */
+    public void nextPlayer(GameState state) {
+
+        int next = (state.getCurrentPlayerIndex() + 1)
+                % state.getPlayers().size();
+
+        state.setCurrentPlayerIndex(next);
+    }
+}