Lazarev_FInal_24.01.2026

pom.xml

@@ -64,6 +64,11 @@
             <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>2.2</version>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/com/javarush/khmelov/lesson13/controller/GameServlet.java

@@ -0,0 +1,77 @@
+package com.javarush.khmelov.lesson13.controller;
+
+import com.javarush.khmelov.lesson13.model.GameResult;
+import com.javarush.khmelov.lesson13.model.Player;
+import com.javarush.khmelov.lesson13.model.Scene;
+import com.javarush.khmelov.lesson13.service.GameEngine;
+import com.javarush.khmelov.lesson13.service.PlayerService;
+import com.javarush.khmelov.lesson13.service.QuestRegistry;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpSession;
+
+import java.io.IOException;
+
+@WebServlet("/game")
+public class GameServlet extends HttpServlet {
+
+    private final PlayerService playerService = PlayerService.getInstance();
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+
+        HttpSession session = req.getSession();
+
+        String login = (String) session.getAttribute("currentPlayerLogin");
+        String questId = (String) session.getAttribute("questId");
+
+        if (login == null || questId == null) {
+            resp.sendRedirect(req.getContextPath() + "/login");
+            return;
+        }
+
+        Player player = playerService.findByLogin(login);
+        if (player == null) {
+            resp.sendRedirect(req.getContextPath() + "/login");
+            return;
+        }
+        req.setAttribute("player", player);
+
+        String questPath = QuestRegistry.getPath(questId);
+        GameEngine engine = new GameEngine(questPath);
+
+        String sceneId = (String) session.getAttribute("sceneId");
+        if (sceneId == null) {
+            sceneId = engine.getStartSceneId();
+            session.setAttribute("sceneId", sceneId);
+        }
+
+        String choiceId = req.getParameter("choice");
+        if (choiceId != null) {
+            GameResult result = engine.makeChoice(sceneId, choiceId);
+
+            if (result.isGameOver()) {
+                if (result.isWin()) {
+                    player.recordWin();
+                } else {
+                    player.recordLoss();
+                }
+            }
+
+            sceneId = result.getNextSceneId();
+            session.setAttribute("sceneId", sceneId);
+
+            req.setAttribute("gameOver", result.isGameOver());
+            req.setAttribute("win", result.isWin());
+        }
+
+        Scene scene = engine.getScene(sceneId);
+        req.setAttribute("scene", scene);
+
+        req.getRequestDispatcher("/WEB-INF/game.jsp").forward(req, resp);
+    }
+}

src/main/java/com/javarush/khmelov/lesson13/controller/LoginServlet.java

@@ -0,0 +1,62 @@
+package com.javarush.khmelov.lesson13.controller;
+
+import com.javarush.khmelov.lesson13.model.Player;
+import com.javarush.khmelov.lesson13.service.PlayerService;
+import com.javarush.khmelov.lesson13.service.QuestRegistry;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpSession;
+
+import java.io.IOException;
+
+@WebServlet("/login")
+public class LoginServlet extends HttpServlet {
+
+    private final PlayerService playerService = PlayerService.getInstance();
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+
+        req.setAttribute("players", playerService.getAll());
+        req.setAttribute("quests", QuestRegistry.getQuestIds());
+        req.getRequestDispatcher("/WEB-INF/login.jsp").forward(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+
+        String login = req.getParameter("login");
+        String password = req.getParameter("password");
+        String questId = req.getParameter("questId");
+        String action = req.getParameter("action"); // login / register
+
+        try {
+            Player player;
+
+            if ("register".equals(action)) {
+                player = playerService.register(login, password);
+            } else {
+                player = playerService.login(login, password);
+            }
+
+            HttpSession session = req.getSession(true);
+            session.setAttribute("currentPlayerLogin", player.getLogin());
+            session.setAttribute("questId", questId);
+            session.removeAttribute("sceneId");
+
+            resp.sendRedirect(req.getContextPath() + "/game");
+
+        } catch (IllegalArgumentException e) {
+            req.setAttribute("error", e.getMessage());
+            req.setAttribute("players", playerService.getAll());
+            req.setAttribute("quests", QuestRegistry.getQuestIds());
+            req.getRequestDispatcher("/WEB-INF/login.jsp").forward(req, resp);
+        }
+    }
+
+}

src/main/java/com/javarush/khmelov/lesson13/controller/IndexServlet.java → src/main/java/com/javarush/khmelov/lesson13/controller/RestartServlet.java

@@ -1,19 +1,23 @@
 package com.javarush.khmelov.lesson13.controller;
 
-import jakarta.servlet.ServletException;
 import jakarta.servlet.annotation.WebServlet;
 import jakarta.servlet.http.HttpServlet;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpSession;
 
 import java.io.IOException;
 
-@WebServlet("")
-public class IndexServlet extends HttpServlet {
+@WebServlet("/restart")
+public class RestartServlet extends HttpServlet {
+
     @Override
-    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        req.getRequestDispatcher("WEB-INF/index.jsp")
-                .forward(req, resp);
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws IOException {
+
+        HttpSession session = req.getSession();
+        session.invalidate();
 
+        resp.sendRedirect(req.getContextPath() + "/login");
     }
 }

src/main/java/com/javarush/khmelov/lesson13/model/Choice.java

@@ -0,0 +1,19 @@
+package com.javarush.khmelov.lesson13.model;
+
+import lombok.Getter;
+
+public class Choice {
+
+    @Getter
+    private final String id;
+    @Getter
+    private final String text;
+    @Getter
+    private final String nextSceneId;
+
+    public Choice(String id, String text, String nextSceneId) {
+        this.id = id;
+        this.text = text;
+        this.nextSceneId = nextSceneId;
+    }
+}

src/main/java/com/javarush/khmelov/lesson13/model/GameResult.java

@@ -0,0 +1,19 @@
+package com.javarush.khmelov.lesson13.model;
+
+import lombok.Getter;
+
+public class GameResult {
+
+    @Getter
+    private final String nextSceneId;
+    @Getter
+    private final boolean gameOver;
+    @Getter
+    private final boolean win;
+
+    public GameResult(String nextSceneId, boolean gameOver, boolean win) {
+        this.nextSceneId = nextSceneId;
+        this.gameOver = gameOver;
+        this.win = win;
+    }
+}

src/main/java/com/javarush/khmelov/lesson13/model/Player.java

@@ -0,0 +1,41 @@
+package com.javarush.khmelov.lesson13.model;
+
+import lombok.Getter;
+
+public class Player {
+
+    @Getter
+    private final String login;
+    @Getter
+    private final String passwordHash;
+    @Getter
+    private int gamesPlayed;
+    @Getter
+    private int wins;
+    @Getter
+    private int losses;
+
+    public Player(String login, String passwordHash) {
+
+        this.login = login;
+        this.passwordHash = passwordHash;
+    }
+
+    public boolean checkPassword(String rawPassword) {
+        return passwordHash.equals(hash(rawPassword));
+    }
+
+    public void recordWin() {
+        gamesPlayed++;
+        wins++;
+    }
+
+    public void recordLoss() {
+        gamesPlayed++;
+        losses++;
+    }
+
+    private static String hash(String input) {
+        return Integer.toHexString(input.hashCode());
+    }
+}