Fixing branch setup to match main

.gitignore

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+# Gradle
+.gradle
+build
+
+# VSC
+bin
+
+# IntelliJ
+*.iml
+.idea
+out
+
+# Eclipse
+.classpath
+.project
+
+# Libraries
+*.so
+*.dylib
+*.dll
+*.jar
+*.class
+
+.DS_Store
+!Projekte/gradle/wrapper/gradle-wrapper.jar
+

Dokumente/.gitignore

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+#

Projekte/.gitattributes

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+*.bat           text eol=crlf
+gradlew         text eol=lf
+

Projekte/.run/BattleshipApp (Mac).run.xml

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+<component name="ProjectRunConfigurationManager">
+    <configuration default="false" name="BattleshipApp (Mac)" type="Application" factoryName="Application"
+                   singleton="false">
+        <option name="MAIN_CLASS_NAME" value="pp.battleship.client.BattleshipApp"/>
+        <module name="Projekte.battleship.client.main"/>
+        <option name="VM_PARAMETERS" value="-XstartOnFirstThread"/>
+        <option name="WORKING_DIRECTORY" value="$MODULE_WORKING_DIR$"/>
+        <extension name="coverage">
+            <pattern>
+                <option name="PATTERN" value="pp.battleship.client.*"/>
+                <option name="ENABLED" value="true"/>
+            </pattern>
+        </extension>
+        <method v="2">
+            <option name="Make" enabled="true"/>
+        </method>
+    </configuration>
+</component>

Projekte/.run/BattleshipApp.run.xml

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+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="BattleshipApp" type="Application" factoryName="Application" singleton="false"
+                 nameIsGenerated="true">
+    <option name="MAIN_CLASS_NAME" value="pp.battleship.client.BattleshipApp"/>
+    <module name="Projekte.battleship.client.main"/>
+    <option name="VM_PARAMETERS" value="-Djava.util.logging.config.file=logging.properties"/>
+    <option name="WORKING_DIRECTORY" value="$MODULE_WORKING_DIR$"/>
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value="pp.battleship.client.*"/>
+        <option name="ENABLED" value="true"/>
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true"/>
+    </method>
+  </configuration>
+</component>

Projekte/.run/BattleshipServer.run.xml

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+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="BattleshipServer" type="Application" factoryName="Application"
+                 nameIsGenerated="true">
+    <option name="MAIN_CLASS_NAME" value="pp.battleship.server.BattleshipServer"/>
+    <module name="Projekte.battleship.server.main"/>
+    <option name="WORKING_DIRECTORY" value="$MODULE_WORKING_DIR$"/>
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value="pp.battleship.server.*"/>
+        <option name="ENABLED" value="true"/>
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true"/>
+    </method>
+  </configuration>
+</component>

Projekte/.run/Projekte [test].run.xml

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+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Projekte [test]" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="--continue" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="test" />
+        </list>
+      </option>
+      <option name="vmOptions" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <RunAsTest>false</RunAsTest>
+    <method v="2" />
+  </configuration>
+</component>

Projekte/README.md

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+# Beispielprogramme des Programmierprojekts
+
+Hier ist der Quellcode für das in der Einarbeitungsphase genutzte Spiel
+_Battleships_ zu finden. Die Quellen bestehen aus den folgenden
+Gradle-Unterprojekten:
+
+* _:battleship:server_
+* _:battleship:client_
+* _:battleship:model_
+* _:battleship:converter_
+* _:common_
+* _:jme-common_
+
+_Battleships_ ist ein netzwerkbasiertes Spiel und besteht aus einem Server- und
+einem Clientanteil, die in den Unterprojekten _:battleship:server_ und
+_:battleship:client_ realisiert sind. Beide nutzen das Unterprojekt
+_:battleship:model_, das den gemeinsamen Modellanteil enthält.
+
+Die Unterprojekte _:common_ und _:jme-common_ enthalten Hilfsklassen.
+
+Das Unterprojekt _:battleship:converter_ wird für _Battleships_ selbst nicht
+benötigt, sondern enthält lediglich den Code, um ein im Spiel verwendetes
+3d-Modell eines Schlachtschiffs in eine _J3O_-Datei umzuwandeln, die von jME
+einfacher geladen werden kann.
+
+## 1 Vorbereitung
+
+Für das Programmierprojekt empfehlen wir die Verwendung von Java 20. Unter Linux
+sollte [_Eclipse Temurin_](https://adoptium.net/temurin/releases/?version=20)
+als JDK verwendet werden, andere JDKs können unter Linux Probleme verursachen.
+Auf anderen Betriebssystemen empfehlen wir aber ebenfalls Temurin. Im Folgenden
+ist beschrieben, wie Sie Temurin installieren und die Umgebungsvariable
+**JAVA_HOME** richtig setzen, damit Sie Gradle (siehe unten) verwenden können.
+
+### 1.1 Installation von Temurin
+
+Laden Sie [_Eclipse Temurin_](https://adoptium.net/temurin/releases/?version=20)
+entsprechend Ihrem Betriebssystem und Ihrer Prozessorarchitektur herunter und
+entpacken Sie das Archiv in einem Verzeichnis Ihrer Wahl auf Ihrem Rechner.
+
+### 1.2 Setzen von JAVA_HOME
+
+Zur Verwendung mit Gradle muss die Umgebungsvariable **JAVA_HOME** richtig
+gesetzt werden. Folgen Sie dazu den nachfolgenden Anweisungen entsprechend Ihrem
+Betriebssystem:
+
+* **Windows:**
+
+  Öffnen Sie ihre Powershell (Core) bzw. ihr Windows Terminal mit Powershell
+  (Core). Überprüfen Sie, ob die Umgebungsvariable korrekt gesetzt ist:  
+  `Get-ChildItem -Path Env:JAVA_HOME`  
+  Falls kein oder ein falscher Pfad gesetzt ist, setzen Sie diesen mit dem
+  folgenden Kommando (in einer Zeile):  
+  `[System.Environment]::SetEnvironmentVariable('JAVA_HOME','<Pfad zum SDK>',[System.EnvironmentVariableTarget]::User)`
+
+  Alternativ können Sie die GUI verwenden. Unter Windows 10 klicken Sie die
+  Windows-Taste und dann das Zahnrad um die Einstellungen zu öffnen. Dort wählen
+  Sie "System", dann "Info" (links unten) und nun
+  "Erweiterte Systemeinstellungen" (rechts) um den Dialog "Systemeigenschaften"
+  zu starten. Im Reiter "Erweitert" klicken Sie
+  "Umgebungsvariablen..." und klicken dann unter "Benutzervariablen" den Knopf
+  "Neu..." um JAVA_HOME anzulegen oder "Bearbeiten" um ihn zu ändern. Geben Sie
+  als Name `JAVA_HOME` und als Wert den Pfad ein. Schließen Sie mit "OK".
+
+  > **(!) Beachten Sie, dass Sie die jeweilige Applikation neu starten müssen**,
+  > um von der gesetzten Umgebungsvariablen Notiz zu nehmen.
+  > Dies betrifft auch die Shell, die Sie gerade verwenden.
+
+* **UNIX (Linux/MacOS):**
+
+  Öffnen oder erstellen Sie die Datei `~/.profile` (wenn Sie die Bash verwenden;
+  bei anderen Shells sind es andere Dateien) und ergänzen Sie am Ende der Datei
+  die Zeile:
+
+  `export JAVA_HOME="<Pfad zum entpackten Archiv>"`
+
+  Ersetzen Sie dabei `<Pfad zum entpackten Archiv>` mit dem entsprechenden Pfad.
+  Zum Beispiel:
+
+  `export JAVA_HOME="/home/user/jdk-20.0.2"`
+
+  Fügen Sie dann die folgende Zeile hinzu:
+
+  `export PATH="$JAVA_HOME/bin:$PATH"`
+
+## 2 Programmstart
+
+Grundsätzlich kann man das gesamte Projekt einfach in IntelliJ öffnen. Details
+dazu sind im Aufgabenblatt zur Einarbeitungsaufgabe zu finden. Im Folgenden ist
+beschrieben, wie die _Batttleships_ unmittelbar von der Kommandozeile gestartet
+werden können.
+
+Um _Battleships_ spielen zu können, muss man zuerst das Server-Programm auf
+einem Rechner und dann zweimal das Client-Programm auf beliebigen Rechnern
+starten, die TCP/IP-Verbindungen zum Server erlauben. Natürlich ist es auch
+möglich, alle drei Programme auf demselben Rechner zu starten.
+
+Es empfiehlt sich der Start von der Kommandozeile. Will man alle drei Programme
+auf demselben Rechner starten, sollte man dazu drei Shell-Instanzen öffnen und
+in jeder eines der Programme starten. Auf diese Weise können die
+Logging-Ausgaben der drei Programme voneinander unterschieden werden.
+
+Das Server-Programm startet man unmittelbar mit Gradle mit
+
+`./gradlew :battleship:server:run`
+
+Unter Windows kann es je nach Shell (Eingabeaufforderung cmd) erforderlich sein,
+`/` jeweils durch `\ ` zu ersetzen.
+
+Im Verzeichnis `battleship/server` befindet sich die Datei `config.propeties`,
+worüber sich der Server konfigurieren lässt. Mit der Zeile `port=1234` lässt
+sich der verwendete Server-Port (hier 1234) einstellen. Außerdem befindet sich
+dort die Datei `logging.properties`, womit das Logging des Servers konfiguriert
+wird.
+
+Das Client-Programm startet man unmittelbar mit Gradle mit
+
+`./gradlew :battleship:client:run`
+
+Die Datei `logging.properties` im Verzeichnis `battleship/client` konfiguriert
+das Logging des Clients.
+
+Alternativ kann man auch die Start-Skripte
+
+* `./battleship/server/build/install/battleship-server/bin/battleship-server`
+* `./battleship/client/build/install/battleship/bin/battleship`
+
+direkt in der Kommandozeile starten. Allerdings müssen sie zuvor mittels
+
+`./gradlew installDist`
+
+erzeugt worden sein. Beachten Sie aber, dass nur im **aktuellen
+Arbeitsverzeichnis** nach den Dateien `config.properties` und
+`logging.properties` gesucht wird und diese geladen werden. Das heißt, dass die
+vordefinierten Dateien in den Verzeichnissen `battleship/server` und
+`battleship/client` nur dann gelesen werden, wenn Sie diese Verzeichnisse als
+aktuelle Arbeitsverzeichnisse nutzen. Wie üblich müssen Sie dazu in der
+Kommandozeile
+
+`cd battleship/server`
+
+bzw.
+
+`cd battleship/client`
+
+eingeben.
+
+## 3 Hinweise zu _Battleships_
+
+Der _Battleships_-Client hat ein Menü, in das man immer mit der
+Esc-Taste kommt. Aus dem Menü heraus lässt sich das Programm auch schließen.
+Beachte, dass sich beim Laden und Speichern eines Spiels kein Dateidialog
+öffnet. Vielmehr muss man den Dateipfad in das Dialogfeld eingeben. Da
+JSON-Dateien geschrieben werden, empfiehlt sich das Datei-Suffix _.json_.
+
+## 4 Allgemeine Gradle-Tasks:
+
+- `./gradlew clean`
+
+  Entfernt alle `build`-Verzeichnisse und alle erzeugten Dateien.
+
+- `./gradlew classes`
+
+  Übersetzt den Quellcode und legt unter build den Bytecode sowie
+  Ressourcen ab.
+
+- `./gradlew javadoc`
+
+  Erzeugt die Dokumentation aus den JavaDoc-Kommentaren im Verzeichnis
+  `build/docs/javadoc` des jeweiligen Unterprojekts.
+
+- `./gradlew test`
+
+  Führt die JUnit-Tests durch. Ergebnisse sind im Verzeichnis
+  `build/reports/tests` des jeweiligen Unterprojekts zu finden.
+
+- `./gradlew build`
+
+  Führt die JUnit-Tests durch und erstellt in `build/distributions`
+  gepackte Distributionsdateien
+
+- `./gradlew installDist`
+
+  Erstellt unter `battleship/client/build/install` und
+  `battleship/server/build/install` Verzeichnisse, die jeweils eine ausführbare
+  Distribution samt Start-Skripten enthält (siehe oben).
+
+---
+Juli 2024

Projekte/battleship/client/build.gradle

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+plugins {
+    id 'buildlogic.jme-application-conventions'
+}
+
+description = 'Battleship Client'
+
+dependencies {
+    implementation project(":jme-common")
+    implementation project(":battleship:model")
+
+    implementation libs.jme3.desktop
+
+    runtimeOnly libs.jme3.awt.dialogs
+    runtimeOnly libs.jme3.plugins
+    runtimeOnly libs.jme3.jogg
+    runtimeOnly libs.jme3.testdata
+}
+
+application {
+    mainClass = 'pp.battleship.client.BattleshipApp'
+    applicationName = 'battleship'
+}

Projekte/battleship/client/client.properties

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+########################################
+## Programming project code
+## UniBw M, 2022, 2023, 2024
+## www.unibw.de/inf2
+## (c) Mark Minas (mark.minas@unibw.de)
+########################################
+#
+# Battleship client configuration
+#
+# Specifies the map used by the opponent in single mode.
+# Single mode is activated if this property is set.
+#map.opponent=maps/map2.json
+#
+# Specifies the map used by the player in single mode.
+# The player must define their own map if this property is not set.
+map.own=maps/map1.json
+#
+# Coordinates of the shots fired by the RobotClient in the order listed.
+# Example:
+#   2, 0,\
+#   2, 1,\
+#   2, 2,\
+#   2, 3
+#  defines four shots, namely at the coordinates
+#  (x=2, y=0), (x=2, y=1), (x=2, y=2), and (x=2, y=3)
+robot.targets=2, 0,\
+              2, 1,\
+              2, 2,\
+              2, 3
+#
+# Delay in milliseconds between each shot fired by the RobotClient.
+robot.delay=500
+#
+# The dimensions of the game map used in single mode.
+# 'map.width' defines the number of columns, and 'map.height' defines the number of rows.
+map.width=10
+map.height=10
+#
+# The number of ships of each length available in single mode.
+# The value is a comma-separated list where each element corresponds to the number of ships
+# with a specific length. For example:
+# ship.nums=4, 3, 2, 1
+# This configuration means:
+#   - 4 ships of length 1
+#   - 3 ships of length 2
+#   - 2 ships of length 3
+#   - 1 ship of length 4
+ship.nums=4, 3, 2, 1
+#
+# Screen settings
+#
+# Color of the text displayed at the top of the overlay.
+# The format is (red, green, blue, alpha) where each value ranges from 0 to 1.
+overlay.top.color=1, 1, 1, 1
+#
+# Application settings configuration
+# Determines whether the settings window is shown at startup.
+settings.show=false
+#
+# Specifies the width of the application window in pixels.
+settings.resolution.width=1200
+#
+# Specifies the height of the application window in pixels.
+settings.resolution.height=800
+#
+# Determines whether the application runs in full-screen mode.
+settings.full-screen=false
+#
+# Enables or disables gamma correction to improve color accuracy.
+settings.use-gamma-correction=true
+#
+# Indicates whether the statistics window is displayed during gameplay.
+statistics.show=false

Projekte/battleship/client/logging.properties

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+handlers=java.util.logging.ConsoleHandler
+.level=INFO
+pp.level=FINE
+com.jme3.network.level=INFO
+;com.jme3.util.TangentBinormalGenerator.level=SEVERE
+java.util.logging.ConsoleHandler.level=FINER
+java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter
+;java.util.logging.SimpleFormatter.format=[%4$s %2$s] %5$s%n

Projekte/battleship/client/maps/map1.json

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+{
+  "width": 10,
+  "height": 10,
+  "ships": [
+    {
+      "length": 4,
+      "x": 2,
+      "y": 8,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 3,
+      "x": 2,
+      "y": 5,
+      "rot": "DOWN"
+    },
+    {
+      "length": 3,
+      "x": 5,
+      "y": 6,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 2,
+      "x": 4,
+      "y": 4,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 2,
+      "x": 7,
+      "y": 4,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 2,
+      "x": 4,
+      "y": 2,
+      "rot": "DOWN"
+    },
+    {
+      "length": 1,
+      "x": 6,
+      "y": 2,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 8,
+      "y": 2,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 6,
+      "y": 0,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 8,
+      "y": 0,
+      "rot": "RIGHT"
+    }
+  ]
+}

Projekte/battleship/client/maps/map2.json

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+{
+  "width": 10,
+  "height": 10,
+  "ships": [
+    {
+      "length": 4,
+      "x": 0,
+      "y": 5,
+      "rot": "DOWN"
+    },
+    {
+      "length": 3,
+      "x": 0,
+      "y": 9,
+      "rot": "DOWN"
+    },
+    {
+      "length": 3,
+      "x": 2,
+      "y": 6,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 2,
+      "x": 4,
+      "y": 8,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 2,
+      "x": 2,
+      "y": 4,
+      "rot": "DOWN"
+    },
+    {
+      "length": 2,
+      "x": 2,
+      "y": 1,
+      "rot": "DOWN"
+    },
+    {
+      "length": 1,
+      "x": 6,
+      "y": 2,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 8,
+      "y": 2,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 6,
+      "y": 0,
+      "rot": "RIGHT"
+    },
+    {
+      "length": 1,
+      "x": 8,
+      "y": 0,
+      "rot": "RIGHT"
+    }
+  ]
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/BattleshipApp.java

@@ -0,0 +1,429 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.jme3.app.DebugKeysAppState;
+import com.jme3.app.SimpleApplication;
+import com.jme3.app.StatsAppState;
+import com.jme3.font.BitmapFont;
+import com.jme3.font.BitmapText;
+import com.jme3.input.KeyInput;
+import com.jme3.input.MouseInput;
+import com.jme3.input.controls.ActionListener;
+import com.jme3.input.controls.KeyTrigger;
+import com.jme3.input.controls.MouseButtonTrigger;
+import com.jme3.system.AppSettings;
+import com.simsilica.lemur.GuiGlobals;
+import com.simsilica.lemur.style.BaseStyles;
+import pp.battleship.client.gui.BattleAppState;
+import pp.battleship.client.gui.EditorAppState;
+import pp.battleship.client.gui.SeaAppState;
+import pp.battleship.game.client.BattleshipClient;
+import pp.battleship.game.client.ClientGameLogic;
+import pp.battleship.game.client.ServerConnection;
+import pp.battleship.game.singlemode.BattleshipClientConfig;
+import pp.battleship.game.singlemode.ServerConnectionMockup;
+import pp.battleship.notification.ClientStateEvent;
+import pp.battleship.notification.GameEventListener;
+import pp.battleship.notification.InfoTextEvent;
+import pp.dialog.DialogBuilder;
+import pp.dialog.DialogManager;
+import pp.graphics.Draw;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.logging.LogManager;
+
+import static pp.battleship.Resources.lookup;
+
+/**
+ * The main class for the Battleship client application.
+ * It manages the initialization, input setup, GUI setup, and game states for the client.
+ */
+public class BattleshipApp extends SimpleApplication implements BattleshipClient, GameEventListener {
+
+    /**
+     * Logger for logging messages within the application.
+     */
+    private static final Logger LOGGER = System.getLogger(BattleshipApp.class.getName());
+
+    /**
+     * Path to the styles script for GUI elements.
+     */
+    private static final String STYLES_SCRIPT = "Interface/Lemur/pp-styles.groovy"; //NON-NLS
+
+    /**
+     * Path to the font resource used in the GUI.
+     */
+    private static final String FONT = "Interface/Fonts/Default.fnt"; //NON-NLS
+
+    /**
+     * Path to the client configuration file, if one exists.
+     */
+    private static final File CONFIG_FILE = new File("client.properties");
+
+    /**
+     * Input mapping name for mouse clicks.
+     */
+    public static final String CLICK = "CLICK";
+
+    /**
+     * Input mapping name for the Escape key.
+     */
+    private static final String ESC = "ESC";
+
+    /**
+     * Manager for handling dialogs within the application.
+     */
+    private final DialogManager dialogManager = new DialogManager(this);
+
+    /**
+     * The server connection instance, used for communicating with the game server.
+     */
+    private final ServerConnection serverConnection;
+
+    /**
+     * Instance of the {@link Draw} class for rendering graphics.
+     */
+    private Draw draw;
+
+    /**
+     * Text display at the top of the GUI for showing information to the user.
+     */
+    private BitmapText topText;
+
+    /**
+     * Executor service for handling asynchronous tasks within the application.
+     */
+    private ExecutorService executor;
+
+    /**
+     * Handler for managing the client's game logic.
+     */
+    private final ClientGameLogic logic;
+
+    /**
+     * Configuration settings for the Battleship client application.
+     */
+    private final BattleshipAppConfig config;
+
+    /**
+     * Listener for handling actions triggered by the Escape key.
+     */
+    private final ActionListener escapeListener = (name, isPressed, tpf) -> escape(isPressed);
+
+    static {
+        // Configure logging
+        LogManager manager = LogManager.getLogManager();
+        try {
+            manager.readConfiguration(new FileInputStream("logging.properties"));
+            LOGGER.log(Level.INFO, "Successfully read logging properties"); //NON-NLS
+        }
+        catch (IOException e) {
+            LOGGER.log(Level.INFO, e.getMessage());
+        }
+    }
+
+    /**
+     * Starts the Battleship application.
+     *
+     * @param args Command-line arguments for launching the application.
+     */
+    public static void main(String[] args) {
+        new BattleshipApp().start();
+    }
+
+    /**
+     * Constructs a new {@code BattleshipApp} instance.
+     * Initializes the configuration, server connection, and game logic listeners.
+     */
+    private BattleshipApp() {
+        config = new BattleshipAppConfig();
+        config.readFromIfExists(CONFIG_FILE);
+        serverConnection = makeServerConnection();
+        logic = new ClientGameLogic(serverConnection);
+        logic.addListener(this);
+        setShowSettings(config.getShowSettings());
+        setSettings(makeSettings());
+    }
+
+    /**
+     * Creates and configures application settings from the client configuration.
+     *
+     * @return A configured {@link AppSettings} object.
+     */
+    private AppSettings makeSettings() {
+        final AppSettings settings = new AppSettings(true);
+        settings.setTitle(lookup("battleship.name"));
+        settings.setResolution(config.getResolutionWidth(), config.getResolutionHeight());
+        settings.setFullscreen(config.fullScreen());
+        settings.setUseRetinaFrameBuffer(config.useRetinaFrameBuffer());
+        settings.setGammaCorrection(config.useGammaCorrection());
+        return settings;
+    }
+
+    /**
+     * Factory method for creating a server connection based on the current
+     * client configuration.
+     *
+     * @return A {@link ServerConnection} instance, which could be a real or mock server.
+     */
+    private ServerConnection makeServerConnection() {
+        if (config.isSingleMode())
+            return new ServerConnectionMockup(this);
+        return new NetworkSupport(this);
+    }
+
+    /**
+     * Returns the dialog manager responsible for managing in-game dialogs.
+     *
+     * @return The {@link DialogManager} instance.
+     */
+    DialogManager getDialogManager() {
+        return dialogManager;
+    }
+
+    /**
+     * Returns the game logic handler for the client.
+     *
+     * @return The {@link ClientGameLogic} instance.
+     */
+    @Override
+    public ClientGameLogic getGameLogic() {
+        return logic;
+    }
+
+    /**
+     * Returns the current configuration settings for the Battleship client.
+     *
+     * @return The {@link BattleshipClientConfig} instance.
+     */
+    @Override
+    public BattleshipAppConfig getConfig() {
+        return config;
+    }
+
+    /**
+     * Initializes the application.
+     * Sets up input mappings, GUI, game states, and connects to the server.
+     */
+    @Override
+    public void simpleInitApp() {
+        setPauseOnLostFocus(false);
+        draw = new Draw(assetManager);
+        setupInput();
+        setupStates();
+        setupGui();
+        serverConnection.connect();
+    }
+
+    /**
+     * Sets up the graphical user interface (GUI) for the application.
+     */
+    private void setupGui() {
+        GuiGlobals.initialize(this);
+        BaseStyles.loadStyleResources(STYLES_SCRIPT);
+        GuiGlobals.getInstance().getStyles().setDefaultStyle("pp"); //NON-NLS
+        final BitmapFont normalFont = assetManager.loadFont(FONT); //NON-NLS
+        topText = new BitmapText(normalFont);
+        final int height = context.getSettings().getHeight();
+        topText.setLocalTranslation(10f, height - 10f, 0f);
+        topText.setColor(config.getTopColor());
+        guiNode.attachChild(topText);
+    }
+
+    /**
+     * Configures input mappings and sets up listeners for user interactions.
+     */
+    private void setupInput() {
+        inputManager.deleteMapping(INPUT_MAPPING_EXIT);
+        inputManager.setCursorVisible(false);
+        inputManager.addMapping(ESC, new KeyTrigger(KeyInput.KEY_ESCAPE));
+        inputManager.addMapping(CLICK, new MouseButtonTrigger(MouseInput.BUTTON_LEFT));
+        inputManager.addListener(escapeListener, ESC);
+    }
+
+    /**
+     * Initializes and attaches the necessary application states for the game.
+     */
+    private void setupStates() {
+        if (config.getShowStatistics()) {
+            final BitmapFont normalFont = assetManager.loadFont(FONT); //NON-NLS
+            final StatsAppState stats = new StatsAppState(guiNode, normalFont);
+            stateManager.attach(stats);
+        }
+        flyCam.setEnabled(false);
+        stateManager.detach(stateManager.getState(StatsAppState.class));
+        stateManager.detach(stateManager.getState(DebugKeysAppState.class));
+
+        attachGameSound();
+        stateManager.attachAll(new EditorAppState(), new BattleAppState(), new SeaAppState());
+    }
+
+    /**
+     * Attaches the game sound state and sets its initial enabled state.
+     */
+    private void attachGameSound() {
+        final GameSound gameSound = new GameSound();
+        logic.addListener(gameSound);
+        gameSound.setEnabled(GameSound.enabledInPreferences());
+        stateManager.attach(gameSound);
+    }
+
+    /**
+     * Updates the application state every frame.
+     * This method is called once per frame during the game loop.
+     *
+     * @param tpf Time per frame in seconds.
+     */
+    @Override
+    public void simpleUpdate(float tpf) {
+        super.simpleUpdate(tpf);
+        dialogManager.update(tpf);
+        logic.update(tpf);
+    }
+
+    /**
+     * Handles the Escape key action to either close the top dialog or show the main menu.
+     *
+     * @param isPressed Indicates whether the Escape key is pressed.
+     */
+    private void escape(boolean isPressed) {
+        if (!isPressed) return;
+        if (dialogManager.showsDialog())
+            dialogManager.escape();
+        else
+            new Menu(this).open();
+    }
+
+    /**
+     * Returns the {@link Draw} instance used for rendering graphical elements in the game.
+     *
+     * @return The {@link Draw} instance.
+     */
+    public Draw getDraw() {
+        return draw;
+    }
+
+    /**
+     * Handles a request to close the application.
+     * If the request is initiated by pressing ESC, this parameter is true.
+     *
+     * @param esc If true, the request is due to the ESC key being pressed.
+     */
+    @Override
+    public void requestClose(boolean esc) { /* do nothing */ }
+
+    /**
+     * Closes the application, displaying a confirmation dialog if the client is connected to a server.
+     */
+    public void closeApp() {
+        if (serverConnection.isConnected())
+            confirmDialog(lookup("confirm.leaving"), this::close);
+        else
+            close();
+    }
+
+    /**
+     * Closes the application, disconnecting from the server and stopping the application.
+     */
+    private void close() {
+        serverConnection.disconnect();
+        stop();
+    }
+
+    /**
+     * Updates the informational text displayed in the GUI.
+     *
+     * @param text The information text to display.
+     */
+    void setInfoText(String text) {
+        LOGGER.log(Level.DEBUG, "setInfoText {0}", text); //NON-NLS
+        topText.setText(text);
+    }
+
+    /**
+     * Updates the informational text in the GUI based on the key received in an {@link InfoTextEvent}.
+     *
+     * @param event The {@link InfoTextEvent} containing the key for the text to display.
+     */
+    @Override
+    public void receivedEvent(InfoTextEvent event) {
+        LOGGER.log(Level.DEBUG, "received info text {0}", event.key()); //NON-NLS
+        setInfoText(lookup(event.key()));
+    }
+
+    /**
+     * Handles client state events to update the game states accordingly.
+     *
+     * @param event The {@link ClientStateEvent} representing the state change.
+     */
+    @Override
+    public void receivedEvent(ClientStateEvent event) {
+        stateManager.getState(EditorAppState.class).setEnabled(logic.showEditor());
+        stateManager.getState(BattleAppState.class).setEnabled(logic.showBattle());
+        stateManager.getState(SeaAppState.class).setEnabled(logic.showBattle());
+    }
+
+    /**
+     * Returns the executor service used for handling multithreaded tasks.
+     *
+     * @return The {@link ExecutorService} instance.
+     */
+    public ExecutorService getExecutor() {
+        if (executor == null)
+            executor = Executors.newCachedThreadPool();
+        return executor;
+    }
+
+    /**
+     * Stops the application, shutting down the executor service and halting execution.
+     *
+     * @param waitFor If true, waits for the application to stop before returning.
+     */
+    @Override
+    public void stop(boolean waitFor) {
+        if (executor != null) executor.shutdownNow();
+        super.stop(waitFor);
+    }
+
+    /**
+     * Displays a confirmation dialog with a specified question and action for the "Yes" button.
+     *
+     * @param question  The question to display in the dialog.
+     * @param yesAction The action to perform if "Yes" is selected.
+     */
+    void confirmDialog(String question, Runnable yesAction) {
+        DialogBuilder.simple(dialogManager)
+                     .setTitle(lookup("dialog.question"))
+                     .setText(question)
+                     .setOkButton(lookup("button.yes"), yesAction)
+                     .setNoButton(lookup("button.no"))
+                     .build()
+                     .open();
+    }
+
+    /**
+     * Displays an error dialog with the specified error message.
+     *
+     * @param errorMessage The error message to display in the dialog.
+     */
+    void errorDialog(String errorMessage) {
+        DialogBuilder.simple(dialogManager)
+                     .setTitle(lookup("dialog.error"))
+                     .setText(errorMessage)
+                     .setOkButton(lookup("button.ok"))
+                     .build()
+                     .open();
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/BattleshipAppConfig.java

@@ -0,0 +1,196 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.jme3.math.ColorRGBA;
+import pp.battleship.game.singlemode.BattleshipClientConfig;
+
+/**
+ * Provides access to the Battleship application configuration.
+ * Extends {@link BattleshipClientConfig} to include additional properties specific to the client,
+ * particularly those related to screen settings and visual customization.
+ * <p>
+ * <b>Note:</b> Attributes of this class should not be marked as {@code final}
+ * to ensure proper functionality when reading from a properties file.
+ * </p>
+ */
+public class BattleshipAppConfig extends BattleshipClientConfig {
+
+    /**
+     * Converts a string value found in the properties file into an object of the specified type.
+     * Extends the superclass method to support conversion to {@link ColorRGBA}.
+     *
+     * @param value      the string value to be converted
+     * @param targetType the target type into which the value string is converted
+     * @return the converted object of the specified type
+     */
+    @Override
+    protected Object convertToType(String value, Class<?> targetType) {
+        if (targetType == ColorRGBA.class)
+            return makeColorRGBA(value);
+        return super.convertToType(value, targetType);
+    }
+
+    /**
+     * Converts the specified string value to a corresponding {@link ColorRGBA} object.
+     *
+     * @param value the color in the format "red, green, blue, alpha" with all values in the range [0..1]
+     * @return a {@link ColorRGBA} object representing the color
+     * @throws IllegalArgumentException if the input string is not in the expected format
+     */
+    private static ColorRGBA makeColorRGBA(String value) {
+        String[] split = value.split(",", -1);
+        try {
+            if (split.length == 4)
+                return new ColorRGBA(Float.parseFloat(split[0]),
+                                     Float.parseFloat(split[1]),
+                                     Float.parseFloat(split[2]),
+                                     Float.parseFloat(split[3]));
+        }
+        catch (NumberFormatException e) {
+            // deliberately left empty
+        }
+        throw new IllegalArgumentException(value + " should consist of exactly 4 numbers");
+    }
+
+    /**
+     * The width of the game view resolution in pixels.
+     */
+    @Property("settings.resolution.width") //NON-NLS
+    private int resolutionWidth = 1200;
+
+    /**
+     * The height of the game view resolution in pixels.
+     */
+    @Property("settings.resolution.height") //NON-NLS
+    private int resolutionHeight = 800;
+
+    /**
+     * Specifies whether the game should start in full-screen mode.
+     */
+    @Property("settings.full-screen") //NON-NLS
+    private boolean fullScreen = false;
+
+    /**
+     * Specifies whether gamma correction should be enabled.
+     * If enabled, the main framebuffer is configured for sRGB colors,
+     * and sRGB images are linearized.
+     * <p>
+     * Requires a GPU that supports GL_ARB_framebuffer_sRGB; otherwise, this setting will be ignored.
+     * </p>
+     */
+    @Property("settings.use-gamma-correction") //NON-NLS
+    private boolean useGammaCorrection = true;
+
+    /**
+     * Specifies whether full resolution framebuffers should be used on Retina displays.
+     * This setting is ignored on non-Retina platforms.
+     */
+    @Property("settings.use-retina-framebuffer") //NON-NLS
+    private boolean useRetinaFrameBuffer = false;
+
+    /**
+     * Specifies whether the settings window should be shown for configuring the game.
+     */
+    @Property("settings.show") //NON-NLS
+    private boolean showSettings = false;
+
+    /**
+     * Specifies whether the JME statistics window should be shown in the lower left corner of the screen.
+     */
+    @Property("statistics.show") //NON-NLS
+    private boolean showStatistics = false;
+
+    /**
+     * The color of the top text during gameplay, represented as a {@link ColorRGBA} object.
+     */
+    @Property("overlay.top.color") //NON-NLS
+    private ColorRGBA topColor = ColorRGBA.White;
+
+    /**
+     * Creates a default {@code BattleshipAppConfig} with predefined values.
+     */
+    public BattleshipAppConfig() {
+        // Default constructor
+    }
+
+    /**
+     * Returns the width of the game view resolution in pixels.
+     *
+     * @return the width of the game view resolution in pixels
+     */
+    public int getResolutionWidth() {
+        return resolutionWidth;
+    }
+
+    /**
+     * Returns the height of the game view resolution in pixels.
+     *
+     * @return the height of the game view resolution in pixels
+     */
+    public int getResolutionHeight() {
+        return resolutionHeight;
+    }
+
+    /**
+     * Returns whether the game should start in full-screen mode.
+     *
+     * @return {@code true} if the game should start in full-screen mode; {@code false} otherwise
+     */
+    public boolean fullScreen() {
+        return fullScreen;
+    }
+
+    /**
+     * Returns whether gamma correction is enabled.
+     * If enabled, the main framebuffer is configured for sRGB colors,
+     * and sRGB images are linearized.
+     *
+     * @return {@code true} if gamma correction is enabled; {@code false} otherwise
+     */
+    public boolean useGammaCorrection() {
+        return useGammaCorrection;
+    }
+
+    /**
+     * Returns whether full resolution framebuffers should be used on Retina displays.
+     * This setting is ignored on non-Retina platforms.
+     *
+     * @return {@code true} if full resolution framebuffers should be used on Retina displays; {@code false} otherwise
+     */
+    public boolean useRetinaFrameBuffer() {
+        return useRetinaFrameBuffer;
+    }
+
+    /**
+     * Returns whether the settings window should be shown for configuring the game.
+     *
+     * @return {@code true} if the settings window should be shown; {@code false} otherwise
+     */
+    public boolean getShowSettings() {
+        return showSettings;
+    }
+
+    /**
+     * Returns whether the JME statistics window should be shown in the lower left corner of the screen.
+     *
+     * @return {@code true} if the statistics window should be shown; {@code false} otherwise
+     */
+    public boolean getShowStatistics() {
+        return showStatistics;
+    }
+
+    /**
+     * Returns the color of the top text during gameplay as a {@link ColorRGBA} object.
+     *
+     * @return the color of the top text during gameplay
+     */
+    public ColorRGBA getTopColor() {
+        return topColor;
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/BattleshipAppState.java

@@ -0,0 +1,102 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.jme3.app.Application;
+import com.jme3.app.state.AbstractAppState;
+import com.jme3.app.state.AppStateManager;
+import pp.battleship.game.client.ClientGameLogic;
+
+/**
+ * Abstract class representing a state in the Battleship game.
+ * Extends the AbstractAppState from jMonkeyEngine to manage state behavior.
+ */
+public abstract class BattleshipAppState extends AbstractAppState {
+    private BattleshipApp app;
+
+    /**
+     * Creates a new BattleshipAppState that is initially disabled.
+     *
+     * @see #setEnabled(boolean)
+     */
+    protected BattleshipAppState() {
+        setEnabled(false);
+    }
+
+    /**
+     * Initializes the state manager and application.
+     *
+     * @param stateManager The state manager
+     * @param application  The application instance
+     */
+    @Override
+    public void initialize(AppStateManager stateManager, Application application) {
+        super.initialize(stateManager, application);
+        this.app = (BattleshipApp) application;
+        if (isEnabled()) enableState();
+    }
+
+    /**
+     * Returns the BattleshipApp instance associated with this BattleshipAppState.
+     *
+     * @return The BattleshipApp instance.
+     */
+    public BattleshipApp getApp() {
+        return app;
+    }
+
+    /**
+     * Returns the client game logic handler.
+     *
+     * @return the client game logic handler
+     */
+    public ClientGameLogic getGameLogic() {
+        return app.getGameLogic();
+    }
+
+    /**
+     * Checks if any dialog is currently displayed.
+     *
+     * @return true if any dialog is currently shown, false otherwise
+     */
+    public boolean showsDialog() {
+        return app.getDialogManager().showsDialog();
+    }
+
+    /**
+     * Sets the enabled state of the BattleshipAppState.
+     * If the new state is the same as the current state, the method returns.
+     *
+     * @param enabled The new enabled state.
+     */
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (isEnabled() == enabled) return;
+        super.setEnabled(enabled);
+        if (app != null) {
+            if (enabled)
+                enableState();
+            else
+                disableState();
+        }
+    }
+
+    /**
+     * This method is called when the state is enabled.
+     * It is meant to be overridden by subclasses to perform
+     * specific actions when the state is enabled.
+     */
+    protected abstract void enableState();
+
+    /**
+     * This method is called when the state is disabled.
+     * It is meant to be overridden by subclasses to perform
+     * specific actions when the state is disabled.
+     */
+    protected abstract void disableState();
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/GameSound.java

@@ -0,0 +1,135 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.jme3.app.Application;
+import com.jme3.app.state.AbstractAppState;
+import com.jme3.app.state.AppStateManager;
+import com.jme3.asset.AssetLoadException;
+import com.jme3.asset.AssetNotFoundException;
+import com.jme3.audio.AudioData;
+import com.jme3.audio.AudioNode;
+import pp.battleship.notification.GameEventListener;
+import pp.battleship.notification.SoundEvent;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.prefs.Preferences;
+
+import static pp.util.PreferencesUtils.getPreferences;
+
+/**
+ * An application state that plays sounds.
+ */
+public class GameSound extends AbstractAppState implements GameEventListener {
+    private static final Logger LOGGER = System.getLogger(GameSound.class.getName());
+    private static final Preferences PREFERENCES = getPreferences(GameSound.class);
+    private static final String ENABLED_PREF = "enabled"; //NON-NLS
+
+    private AudioNode splashSound;
+    private AudioNode shipDestroyedSound;
+    private AudioNode explosionSound;
+
+    /**
+     * Checks if sound is enabled in the preferences.
+     *
+     * @return {@code true} if sound is enabled, {@code false} otherwise.
+     */
+    public static boolean enabledInPreferences() {
+        return PREFERENCES.getBoolean(ENABLED_PREF, true);
+    }
+
+    /**
+     * Toggles the game sound on or off.
+     */
+    public void toggleSound() {
+        setEnabled(!isEnabled());
+    }
+
+    /**
+     * Sets the enabled state of this AppState.
+     * Overrides {@link com.jme3.app.state.AbstractAppState#setEnabled(boolean)}
+     *
+     * @param enabled {@code true} to enable the AppState, {@code false} to disable it.
+     */
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (isEnabled() == enabled) return;
+        super.setEnabled(enabled);
+        LOGGER.log(Level.INFO, "Sound enabled: {0}", enabled); //NON-NLS
+        PREFERENCES.putBoolean(ENABLED_PREF, enabled);
+    }
+
+    /**
+     * Initializes the sound effects for the game.
+     * Overrides {@link AbstractAppState#initialize(AppStateManager, Application)}
+     *
+     * @param stateManager The state manager
+     * @param app          The application
+     */
+    @Override
+    public void initialize(AppStateManager stateManager, Application app) {
+        super.initialize(stateManager, app);
+        shipDestroyedSound = loadSound(app, "Sound/Effects/sunken.wav"); //NON-NLS
+        splashSound = loadSound(app, "Sound/Effects/splash.wav"); //NON-NLS
+        explosionSound = loadSound(app, "Sound/Effects/explosion.wav"); //NON-NLS
+    }
+
+    /**
+     * Loads a sound from the specified file.
+     *
+     * @param app  The application
+     * @param name The name of the sound file.
+     * @return The loaded AudioNode.
+     */
+    private AudioNode loadSound(Application app, String name) {
+        try {
+            final AudioNode sound = new AudioNode(app.getAssetManager(), name, AudioData.DataType.Buffer);
+            sound.setLooping(false);
+            sound.setPositional(false);
+            return sound;
+        }
+        catch (AssetLoadException | AssetNotFoundException ex) {
+            LOGGER.log(Level.ERROR, ex.getMessage(), ex);
+        }
+        return null;
+    }
+
+    /**
+     * Plays the splash sound effect.
+     */
+    public void splash() {
+        if (isEnabled() && splashSound != null)
+            splashSound.playInstance();
+    }
+
+    /**
+     * Plays the explosion sound effect.
+     */
+    public void explosion() {
+        if (isEnabled() && explosionSound != null)
+            explosionSound.playInstance();
+    }
+
+    /**
+     * Plays sound effect when a ship has been destroyed.
+     */
+    public void shipDestroyed() {
+        if (isEnabled() && shipDestroyedSound != null)
+            shipDestroyedSound.playInstance();
+    }
+
+    @Override
+    public void receivedEvent(SoundEvent event) {
+        switch (event.sound()) {
+            case EXPLOSION -> explosion();
+            case SPLASH -> splash();
+            case DESTROYED_SHIP -> shipDestroyed();
+        }
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/Menu.java

@@ -0,0 +1,143 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.simsilica.lemur.Button;
+import com.simsilica.lemur.Checkbox;
+import com.simsilica.lemur.Label;
+import com.simsilica.lemur.style.ElementId;
+import pp.dialog.Dialog;
+import pp.dialog.StateCheckboxModel;
+import pp.dialog.TextInputDialog;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.prefs.Preferences;
+
+import static pp.battleship.Resources.lookup;
+import static pp.util.PreferencesUtils.getPreferences;
+
+/**
+ * The Menu class represents the main menu in the Battleship game application.
+ * It extends the Dialog class and provides functionalities for loading, saving,
+ * returning to the game, and quitting the application.
+ */
+class Menu extends Dialog {
+    private static final Preferences PREFERENCES = getPreferences(Menu.class);
+    private static final String LAST_PATH = "last.file.path";
+    private final BattleshipApp app;
+    private final Button loadButton = new Button(lookup("menu.map.load"));
+    private final Button saveButton = new Button(lookup("menu.map.save"));
+
+    /**
+     * Constructs the Menu dialog for the Battleship application.
+     *
+     * @param app the BattleshipApp instance
+     */
+    public Menu(BattleshipApp app) {
+        super(app.getDialogManager());
+        this.app = app;
+        addChild(new Label(lookup("battleship.name"), new ElementId("header"))); //NON-NLS
+        addChild(new Checkbox(lookup("menu.sound-enabled"),
+                              new StateCheckboxModel(app, GameSound.class)));
+        addChild(loadButton)
+                .addClickCommands(s -> ifTopDialog(this::loadDialog));
+        addChild(saveButton)
+                .addClickCommands(s -> ifTopDialog(this::saveDialog));
+        addChild(new Button(lookup("menu.return-to-game")))
+                .addClickCommands(s -> ifTopDialog(this::close));
+        addChild(new Button(lookup("menu.quit")))
+                .addClickCommands(s -> ifTopDialog(app::closeApp));
+        update();
+    }
+
+    /**
+     * Updates the state of the load and save buttons based on the game logic.
+     */
+    @Override
+    public void update() {
+        loadButton.setEnabled(app.getGameLogic().mayLoadMap());
+        saveButton.setEnabled(app.getGameLogic().maySaveMap());
+    }
+
+    /**
+     * As an escape action, this method closes the menu if it is the top dialog.
+     */
+    @Override
+    public void escape() {
+        close();
+    }
+
+    /**
+     * Functional interface for file actions.
+     */
+    @FunctionalInterface
+    private interface FileAction {
+        /**
+         * Executes a file action.
+         *
+         * @param file the file to be processed
+         * @throws IOException if an I/O error occurs
+         */
+        void run(File file) throws IOException;
+    }
+
+    /**
+     * Handles the file action for the provided dialog.
+     *
+     * @param fileAction the file action to be executed
+     * @param dialog     the dialog providing the file input
+     */
+    private void handle(FileAction fileAction, TextInputDialog dialog) {
+        try {
+            final String path = dialog.getInput().getText();
+            PREFERENCES.put(LAST_PATH, path);
+            fileAction.run(new File(path));
+            dialog.close();
+        }
+        catch (IOException e) {
+            app.errorDialog(e.getLocalizedMessage());
+        }
+    }
+
+    /**
+     * Shows a file dialog for loading or saving files.
+     *
+     * @param fileAction the action to perform with the selected file
+     * @param label      the label for the dialog
+     */
+    private void fileDialog(FileAction fileAction, String label) {
+        final TextInputDialog dialog =
+                TextInputDialog.builder(app.getDialogManager())
+                               .setLabel(lookup("label.file"))
+                               .setFocus(TextInputDialog::getInput)
+                               .setTitle(label)
+                               .setOkButton(lookup("button.ok"), d -> handle(fileAction, d))
+                               .setNoButton(lookup("button.cancel"))
+                               .setOkClose(false)
+                               .build();
+        final String path = PREFERENCES.get(LAST_PATH, null);
+        if (path != null)
+            dialog.getInput().setText(path.trim());
+        dialog.open();
+    }
+
+    /**
+     * Shows the load dialog for loading maps.
+     */
+    private void loadDialog() {
+        fileDialog(app.getGameLogic()::loadMap, lookup("menu.map.load"));
+    }
+
+    /**
+     * Shows the save dialog for saving maps.
+     */
+    private void saveDialog() {
+        fileDialog(app.getGameLogic()::saveMap, lookup("menu.map.save"));
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/NetworkDialog.java

@@ -0,0 +1,153 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.simsilica.lemur.Container;
+import com.simsilica.lemur.Label;
+import com.simsilica.lemur.TextField;
+import com.simsilica.lemur.component.SpringGridLayout;
+import pp.dialog.Dialog;
+import pp.dialog.DialogBuilder;
+import pp.dialog.SimpleDialog;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import static pp.battleship.Resources.lookup;
+
+/**
+ * Represents a dialog for setting up a network connection in the Battleship game.
+ * Allows users to specify the host and port for connecting to a game server.
+ */
+class NetworkDialog extends SimpleDialog {
+    private static final Logger LOGGER = System.getLogger(NetworkDialog.class.getName());
+    private static final String LOCALHOST = "localhost"; //NON-NLS
+    private static final String DEFAULT_PORT = "1234"; //NON-NLS
+    private final NetworkSupport network;
+    private final TextField host = new TextField(LOCALHOST);
+    private final TextField port = new TextField(DEFAULT_PORT);
+    private String hostname;
+    private int portNumber;
+    private Future<Object> connectionFuture;
+    private Dialog progressDialog;
+
+    /**
+     * Constructs a new NetworkDialog.
+     *
+     * @param network The NetworkSupport instance to be used for network operations.
+     */
+    NetworkDialog(NetworkSupport network) {
+        super(network.getApp().getDialogManager());
+        this.network = network;
+        host.setSingleLine(true);
+        host.setPreferredWidth(400f);
+        port.setSingleLine(true);
+
+        final BattleshipApp app = network.getApp();
+        final Container input = new Container(new SpringGridLayout());
+        input.addChild(new Label(lookup("host.name") + ":  "));
+        input.addChild(host, 1);
+        input.addChild(new Label(lookup("port.number") + ":  "));
+        input.addChild(port, 1);
+
+        DialogBuilder.simple(app.getDialogManager())
+                     .setTitle(lookup("server.dialog"))
+                     .setExtension(d -> d.addChild(input))
+                     .setOkButton(lookup("button.connect"), d -> connect())
+                     .setNoButton(lookup("button.cancel"), app::closeApp)
+                     .setOkClose(false)
+                     .setNoClose(false)
+                     .build(this);
+    }
+
+    /**
+     * Handles the action for the connect button in the connection dialog.
+     * Tries to parse the port number and initiate connection to the server.
+     */
+    private void connect() {
+        LOGGER.log(Level.INFO, "connect to host={0}, port={1}", host, port); //NON-NLS
+        try {
+            hostname = host.getText().trim().isEmpty() ? LOCALHOST : host.getText();
+            portNumber = Integer.parseInt(port.getText());
+            openProgressDialog();
+            connectionFuture = network.getApp().getExecutor().submit(this::initNetwork);
+        }
+        catch (NumberFormatException e) {
+            network.getApp().errorDialog(lookup("port.must.be.integer"));
+        }
+    }
+
+    /**
+     * Creates a dialog indicating that the connection is in progress.
+     */
+    private void openProgressDialog() {
+        progressDialog = DialogBuilder.simple(network.getApp().getDialogManager())
+                                      .setText(lookup("label.connecting"))
+                                      .build();
+        progressDialog.open();
+    }
+
+    /**
+     * Tries to initialize the network connection.
+     *
+     * @throws RuntimeException If an error occurs when creating the client.
+     */
+    private Object initNetwork() {
+        try {
+            network.initNetwork(hostname, portNumber);
+            return null;
+        }
+        catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * This method is called by {@linkplain pp.dialog.DialogManager#update(float)} for periodically
+     * updating this dialog. T
+     */
+    @Override
+    public void update(float delta) {
+        if (connectionFuture != null && connectionFuture.isDone())
+            try {
+                connectionFuture.get();
+                success();
+            }
+            catch (ExecutionException e) {
+                failure(e.getCause());
+            }
+            catch (InterruptedException e) {
+                LOGGER.log(Level.WARNING, "Interrupted!", e); //NON-NLS
+                Thread.currentThread().interrupt();
+            }
+    }
+
+    /**
+     * Handles a successful connection to the game server.
+     */
+    private void success() {
+        connectionFuture = null;
+        progressDialog.close();
+        this.close();
+        network.getApp().setInfoText(lookup("wait.for.an.opponent"));
+    }
+
+    /**
+     * Handles a failed connection attempt.
+     *
+     * @param e The cause of the failure.
+     */
+    private void failure(Throwable e) {
+        connectionFuture = null;
+        progressDialog.close();
+        network.getApp().errorDialog(lookup("server.connection.failed"));
+        network.getApp().setInfoText(e.getLocalizedMessage());
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/NetworkSupport.java

@@ -0,0 +1,152 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client;
+
+import com.jme3.network.Client;
+import com.jme3.network.ClientStateListener;
+import com.jme3.network.Message;
+import com.jme3.network.MessageListener;
+import com.jme3.network.Network;
+import pp.battleship.game.client.ServerConnection;
+import pp.battleship.message.client.ClientMessage;
+import pp.battleship.message.server.ServerMessage;
+
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+
+import static pp.battleship.Resources.lookup;
+
+/**
+ * Manages the network connection for the Battleship application.
+ * Handles connecting to and disconnecting from the server, and sending messages.
+ */
+class NetworkSupport implements MessageListener<Client>, ClientStateListener, ServerConnection {
+    private static final Logger LOGGER = System.getLogger(NetworkSupport.class.getName());
+    private final BattleshipApp app;
+    private Client client;
+
+    /**
+     * Constructs a NetworkSupport instance for the given Battleship application.
+     *
+     * @param app The Battleship application instance.
+     */
+    public NetworkSupport(BattleshipApp app) {
+        this.app = app;
+    }
+
+    /**
+     * Returns the Battleship application instance.
+     *
+     * @return Battleship application instance
+     */
+    BattleshipApp getApp() {
+        return app;
+    }
+
+    /**
+     * Checks if there is a connection to the game server.
+     *
+     * @return true if there is a connection to the game server, false otherwise.
+     */
+    @Override
+    public boolean isConnected() {
+        return client != null && client.isConnected();
+    }
+
+    /**
+     * Attempts to join the game if there is no connection yet.
+     * Opens a dialog for the user to enter the host and port information.
+     */
+    @Override
+    public void connect() {
+        if (client == null)
+            new NetworkDialog(this).open();
+    }
+
+    /**
+     * Closes the client connection.
+     */
+    @Override
+    public void disconnect() {
+        if (client == null) return;
+        client.close();
+        client = null;
+        LOGGER.log(Level.INFO, "client closed"); //NON-NLS
+    }
+
+    /**
+     * Initializes the network connection.
+     *
+     * @param host The server's address.
+     * @param port The server's port.
+     * @throws IOException If an I/O error occurs when creating the client.
+     */
+    void initNetwork(String host, int port) throws IOException {
+        if (client != null)
+            throw new IllegalStateException("trying to join a game again");
+        client = Network.connectToServer(host, port);
+        client.start();
+        client.addMessageListener(this);
+        client.addClientStateListener(this);
+    }
+
+    /**
+     * Called when a message is received from the server.
+     *
+     * @param client  The client instance that received the message.
+     * @param message The message received from the server.
+     */
+    @Override
+    public void messageReceived(Client client, Message message) {
+        LOGGER.log(Level.INFO, "message received from server: {0}", message); //NON-NLS
+        if (message instanceof ServerMessage serverMessage)
+            app.enqueue(() -> serverMessage.accept(app.getGameLogic()));
+    }
+
+    /**
+     * Called when the client has successfully connected to the server.
+     *
+     * @param client The client that connected to the server.
+     */
+    @Override
+    public void clientConnected(Client client) {
+        LOGGER.log(Level.INFO, "Client connected: {0}", client); //NON-NLS
+    }
+
+    /**
+     * Called when the client is disconnected from the server.
+     *
+     * @param client         The client that was disconnected.
+     * @param disconnectInfo Information about the disconnection.
+     */
+    @Override
+    public void clientDisconnected(Client client, DisconnectInfo disconnectInfo) {
+        LOGGER.log(Level.INFO, "Client {0} disconnected: {1}", client, disconnectInfo); //NON-NLS
+        if (this.client != client)
+            throw new IllegalArgumentException("parameter value must be client");
+        LOGGER.log(Level.INFO, "client still connected: {0}", client.isConnected()); //NON-NLS
+        this.client = null;
+        disconnect();
+        app.enqueue(() -> app.setInfoText(lookup("lost.connection.to.server")));
+    }
+
+    /**
+     * Sends the specified message to the server.
+     *
+     * @param message The message to be sent to the server.
+     */
+    @Override
+    public void send(ClientMessage message) {
+        LOGGER.log(Level.INFO, "sending {0}", message); //NON-NLS
+        if (client == null)
+            app.errorDialog(lookup("lost.connection.to.server"));
+        else
+            client.send(message);
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/BattleAppState.java

@@ -0,0 +1,122 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.input.controls.ActionListener;
+import com.jme3.scene.Node;
+import com.jme3.system.AppSettings;
+import pp.battleship.client.BattleshipAppState;
+import pp.battleship.model.IntPoint;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+
+import static pp.battleship.client.BattleshipApp.CLICK;
+
+/**
+ * Represents the state responsible for managing the battle interface within the Battleship game.
+ * This state handles the display and interaction of the battle map, including the opponent's map.
+ * It manages GUI components, input events, and the layout of the interface when this state is enabled.
+ */
+public class BattleAppState extends BattleshipAppState {
+    private static final Logger LOGGER = System.getLogger(BattleAppState.class.getName());
+    private static final float DEPTH = 0f;
+    private static final float GAP = 20f;
+
+    /**
+     * A listener for handling click events in the battle interface.
+     * When a click is detected, it triggers the corresponding actions on the opponent's map.
+     */
+    private final ActionListener clickListener = (name, isPressed, tpf) -> click(isPressed);
+
+    /**
+     * The root node for all GUI components in the battle state.
+     */
+    private final Node battleNode = new Node("Battle"); //NON-NLS
+
+    /**
+     * A view representing the opponent's map in the GUI.
+     */
+    private MapView opponentMapView;
+
+    /**
+     * Enables the battle state by initializing, laying out, and adding GUI components.
+     * Attaches the components to the GUI node and registers input listeners.
+     */
+    @Override
+    protected void enableState() {
+        battleNode.detachAllChildren();
+        initializeGuiComponents();
+        layoutGuiComponents();
+        addGuiComponents();
+        getApp().getGuiNode().attachChild(battleNode);
+        getApp().getInputManager().addListener(clickListener, CLICK);
+    }
+
+    /**
+     * Disables the battle state by removing GUI components and unregistering input listeners.
+     * Also handles cleanup of resources, such as the opponent's map view.
+     */
+    @Override
+    protected void disableState() {
+        getApp().getGuiNode().detachChild(battleNode);
+        getApp().getInputManager().removeListener(clickListener);
+        if (opponentMapView != null) {
+            opponentMapView.unregister();
+            opponentMapView = null;
+        }
+    }
+
+    /**
+     * Initializes the GUI components used in the battle state.
+     * Creates the opponent's map view and adds a grid overlay to it.
+     */
+    private void initializeGuiComponents() {
+        opponentMapView = new MapView(getGameLogic().getOpponentMap(), getApp());
+        opponentMapView.addGrid();
+    }
+
+    /**
+     * Adds the initialized GUI components to the battle node.
+     * Currently, it attaches the opponent's map view to the node.
+     */
+    private void addGuiComponents() {
+        battleNode.attachChild(opponentMapView.getNode());
+    }
+
+    /**
+     * Lays out the GUI components within the window, positioning them appropriately.
+     * The opponent's map view is positioned based on the window's dimensions and a specified gap.
+     */
+    private void layoutGuiComponents() {
+        final AppSettings s = getApp().getContext().getSettings();
+        final float mapWidth = opponentMapView.getWidth();
+        final float mapHeight = opponentMapView.getHeight();
+        final float windowWidth = s.getWidth();
+        final float windowHeight = s.getHeight();
+
+        opponentMapView.getNode().setLocalTranslation(windowWidth - mapWidth - GAP,
+                                                      windowHeight - mapHeight - GAP,
+                                                      DEPTH);
+    }
+
+    /**
+     * Handles click events in the battle interface. If the event indicates a click (not a release),
+     * it translates the cursor position to the model's coordinate system and triggers the game logic
+     * for interacting with the opponent's map.
+     *
+     * @param isPressed whether the mouse button is currently pressed (true) or released (false)
+     */
+    private void click(boolean isPressed) {
+        if (!isPressed || showsDialog())
+            return;
+        final IntPoint cursorPos = opponentMapView.mouseToModel(getApp().getInputManager().getCursorPosition());
+        LOGGER.log(Level.DEBUG, "click: {0}", cursorPos); //NON-NLS
+        getGameLogic().clickOpponentMap(cursorPos);
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/EditorAppState.java

@@ -0,0 +1,173 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.input.controls.ActionListener;
+import com.jme3.math.Vector2f;
+import com.jme3.scene.Node;
+import com.jme3.system.AppSettings;
+import com.simsilica.lemur.Button;
+import com.simsilica.lemur.Container;
+import pp.battleship.client.BattleshipAppState;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+
+import static pp.battleship.Resources.lookup;
+import static pp.battleship.client.BattleshipApp.CLICK;
+
+/**
+ * EditorState manages the editor mode in the Battleship game,
+ * allowing players to place and rotate ships.
+ */
+public class EditorAppState extends BattleshipAppState {
+    private static final Logger LOGGER = System.getLogger(EditorAppState.class.getName());
+    private static final float DEPTH = 0f;
+    private static final float GAP = 20f;
+
+    private final ActionListener clickListener = (name, isPressed, tpf) -> click(isPressed);
+    private final Node editorNode = new Node("Editor"); //NON-NLS
+    private Container buttonContainer;
+    private Button rotateButton;
+    private Button readyButton;
+    private MapView ownMapView;
+    private MapView harborView;
+    private Vector2f oldCursorPosition;
+
+    /**
+     * Enables the editor state by attaching necessary nodes and listeners.
+     */
+    @Override
+    protected void enableState() {
+        editorNode.detachAllChildren();
+        initializeGuiComponents();
+        addGuiComponents();
+        layoutGuiComponents();
+        getApp().getGuiNode().attachChild(editorNode);
+        getApp().getInputManager().addListener(clickListener, CLICK);
+    }
+
+    /**
+     * Disables the editor state by detaching nodes and removing listeners.
+     */
+    @Override
+    protected void disableState() {
+        getApp().getGuiNode().detachChild(editorNode);
+        getApp().getInputManager().removeListener(clickListener);
+        if (ownMapView != null) {
+            ownMapView.unregister();
+            ownMapView = null;
+        }
+        if (harborView != null) {
+            harborView.unregister();
+            harborView = null;
+        }
+    }
+
+    /**
+     * Updates the editor state, handling cursor movement and enabling buttons.
+     *
+     * @param tpf Time per frame
+     */
+    @Override
+    public void update(float tpf) {
+        super.update(tpf);
+        cursorMovement();
+        enableButtons();
+    }
+
+    /**
+     * Enables or disables buttons based on the logic state.
+     */
+    private void enableButtons() {
+        readyButton.setEnabled(getGameLogic().isMapComplete());
+        rotateButton.setEnabled(getGameLogic().movingShip());
+    }
+
+    /**
+     * Handles cursor movement for previewing ship placement.
+     */
+    private void cursorMovement() {
+        if (!getGameLogic().movingShip() || ownMapView == null || showsDialog())
+            return;
+        final Vector2f cursorPosition = getApp().getInputManager().getCursorPosition();
+        if (!cursorPosition.equals(oldCursorPosition)) {
+            oldCursorPosition = new Vector2f(cursorPosition);
+            getGameLogic().movePreview(ownMapView.mouseToModel(cursorPosition));
+        }
+    }
+
+    /**
+     * Initializes the GUI components for the editor.
+     */
+    private void initializeGuiComponents() {
+        ownMapView = new MapView(getGameLogic().getOwnMap(), getApp());
+        harborView = new MapView(getGameLogic().getHarbor(), getApp());
+        ownMapView.addGrid();
+        rotateButton = new Button(lookup("button.rotate"));
+        readyButton = new Button(lookup("button.ready"));
+        rotateButton.addClickCommands(e -> {
+            if (!showsDialog())
+                getGameLogic().rotateShip();
+        });
+        readyButton.addClickCommands(e -> {
+            if (!showsDialog())
+                getGameLogic().mapFinished();
+        });
+        buttonContainer = new Container();
+    }
+
+    /**
+     * Adds the GUI components to the editor node.
+     */
+    private void addGuiComponents() {
+        buttonContainer.addChild(rotateButton, 0, 0);
+        buttonContainer.addChild(readyButton, 0, 1);
+        editorNode.attachChild(ownMapView.getNode());
+        editorNode.attachChild(harborView.getNode());
+        editorNode.attachChild(buttonContainer);
+    }
+
+    /**
+     * Lays out the GUI components on the screen.
+     */
+    private void layoutGuiComponents() {
+        final AppSettings s = getApp().getContext().getSettings();
+        final float harborWidth = harborView.getWidth();
+        final float harborHeight = harborView.getHeight();
+        final float ownMapWidth = ownMapView.getWidth();
+        final float ownMapHeight = ownMapView.getHeight();
+        final float windowWidth = s.getWidth();
+        final float windowHeight = s.getHeight();
+
+        ownMapView.getNode()
+                  .setLocalTranslation(0.5f * (windowWidth - harborWidth - ownMapWidth - GAP),
+                                       0.5f * (windowHeight - ownMapHeight),
+                                       DEPTH);
+
+        harborView.getNode()
+                  .setLocalTranslation(0.5f * (windowWidth - harborWidth + ownMapWidth + GAP),
+                                       0.5f * (windowHeight - harborHeight),
+                                       DEPTH);
+
+        buttonContainer.setLocalTranslation(0.5f * (windowWidth - harborWidth - ownMapWidth - GAP),
+                                            0.5f * (windowHeight - ownMapHeight - GAP),
+                                            DEPTH);
+    }
+
+    /**
+     * Handles click events to place or rotate ships on the maps.
+     */
+    private void click(boolean isPressed) {
+        if (!isPressed || showsDialog()) return;
+        final Vector2f cursorPos = getApp().getInputManager().getCursorPosition();
+        LOGGER.log(Level.DEBUG, "click: {0}", cursorPos); //NON-NLS
+        getGameLogic().clickHarbor(harborView.mouseToModel(cursorPos));
+        getGameLogic().clickOwnMap(ownMapView.mouseToModel(cursorPos));
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/MapView.java

@@ -0,0 +1,191 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.material.Material;
+import com.jme3.material.RenderState.BlendMode;
+import com.jme3.math.ColorRGBA;
+import com.jme3.math.Vector2f;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial.CullHint;
+import com.jme3.scene.shape.Quad;
+import pp.battleship.client.BattleshipApp;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.ShipMap;
+import pp.util.FloatPoint;
+import pp.util.Position;
+
+/**
+ * Represents the visual view of a {@link ShipMap}, used to display the map structure such as the player's map, harbor,
+ * and opponent's map. This class handles the graphical representation of the map, including background setup, grid lines,
+ * and interaction between the model and the view.
+ */
+class MapView {
+    private static final float FIELD_SIZE = 40f;
+    private static final float GRID_LINE_WIDTH = 2f;
+    private static final float BACKGROUND_DEPTH = -4f;
+    private static final float GRID_DEPTH = -1f;
+    private static final ColorRGBA BACKGROUND_COLOR = new ColorRGBA(0, 0.05f, 0.05f, 0.5f);
+    private static final ColorRGBA GRID_COLOR = ColorRGBA.Green;
+
+    // Reference to the main application and the ship map being visualized
+    private final BattleshipApp app;
+    private final Node mapNode = new Node("map"); // NON-NLS
+    private final ShipMap map;
+    private final MapViewSynchronizer synchronizer;
+
+    /**
+     * Constructs a new MapView for a given {@link ShipMap} and {@link BattleshipApp}.
+     * Initializes the view by setting up the background and registering a synchronizer to listen to changes in the map.
+     *
+     * @param map the ship map to visualize
+     * @param app the main application instance
+     */
+    MapView(ShipMap map, BattleshipApp app) {
+        this.map = map;
+        this.app = app;
+        this.synchronizer = new MapViewSynchronizer(this);
+        setupBackground();
+        app.getGameLogic().addListener(synchronizer);
+    }
+
+    /**
+     * Unregisters the {@link MapViewSynchronizer} from the listener list of the ClientGameLogic,
+     * stopping the view from receiving updates when the underlying {@link ShipMap} changes.
+     * After calling this method, this MapView instance should no longer be used.
+     */
+    void unregister() {
+        app.getGameLogic().removeListener(synchronizer);
+    }
+
+    /**
+     * Gets the {@link ShipMap} associated with this view.
+     *
+     * @return the ship map
+     */
+    public ShipMap getMap() {
+        return map;
+    }
+
+    /**
+     * Gets the {@link BattleshipApp} instance associated with this view.
+     *
+     * @return the main application instance
+     */
+    public BattleshipApp getApp() {
+        return app;
+    }
+
+    /**
+     * Sets up the background of the map view using a quad geometry.
+     * The background is configured with a semi-transparent color and placed at a specific depth.
+     */
+    private void setupBackground() {
+        final Material mat = new Material(app.getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md"); // NON-NLS
+        mat.setColor("Color", BACKGROUND_COLOR); // NON-NLS
+        mat.getAdditionalRenderState().setBlendMode(BlendMode.Alpha);
+        final Position corner = modelToView(map.getWidth(), map.getHeight());
+        final Geometry background = new Geometry("MapBackground", new Quad(corner.getX(), corner.getY()));
+        background.setMaterial(mat);
+        background.setLocalTranslation(0f, 0f, BACKGROUND_DEPTH);
+        background.setCullHint(CullHint.Never);
+        mapNode.attachChild(background);
+    }
+
+    /**
+     * Adds grid lines to the map view to visually separate the fields within the map.
+     * The grid lines are drawn based on the dimensions of the ship map.
+     */
+    public void addGrid() {
+        for (int x = 0; x <= map.getWidth(); x++) {
+            final Position f = modelToView(x, 0);
+            final Position t = modelToView(x, map.getHeight());
+            mapNode.attachChild(gridLine(f, t));
+        }
+        for (int y = 0; y <= map.getHeight(); y++) {
+            final Position f = modelToView(0, y);
+            final Position t = modelToView(map.getWidth(), y);
+            mapNode.attachChild(gridLine(f, t));
+        }
+    }
+
+    /**
+     * Gets the root node containing all visual elements in this map view.
+     *
+     * @return the root node for the map view
+     */
+    public Node getNode() {
+        return mapNode;
+    }
+
+    /**
+     * Gets the total width of the map in view coordinates.
+     *
+     * @return the width of the map in view coordinates
+     */
+    public float getWidth() {
+        return FIELD_SIZE * map.getWidth();
+    }
+
+    /**
+     * Gets the total height of the map in view coordinates.
+     *
+     * @return the height of the map in view coordinates
+     */
+    public float getHeight() {
+        return FIELD_SIZE * map.getHeight();
+    }
+
+    /**
+     * Converts coordinates from view coordinates to model coordinates.
+     *
+     * @param x the x-coordinate in view space
+     * @param y the y-coordinate in view space
+     * @return the corresponding model coordinates as an {@link IntPoint}
+     */
+    public IntPoint viewToModel(float x, float y) {
+        return new IntPoint((int) Math.floor(x / FIELD_SIZE), (int) Math.floor(y / FIELD_SIZE));
+    }
+
+    /**
+     * Converts coordinates from model coordinates to view coordinates.
+     *
+     * @param x the x-coordinate in model space
+     * @param y the y-coordinate in model space
+     * @return the corresponding view coordinates as a {@link Position}
+     */
+    public Position modelToView(float x, float y) {
+        return new FloatPoint(x * FIELD_SIZE, y * FIELD_SIZE);
+    }
+
+    /**
+     * Converts the mouse position to model coordinates.
+     * This method takes into account the map's transformation in the 3D scene.
+     *
+     * @param pos the 2D vector representing the mouse position in the view
+     * @return the corresponding model coordinates as an {@link IntPoint}
+     */
+    public IntPoint mouseToModel(Vector2f pos) {
+        final Vector3f world = new Vector3f(pos.getX(), pos.getY(), 0f);
+        final Vector3f view = mapNode.getWorldTransform().transformInverseVector(world, null);
+        return viewToModel(view.getX(), view.getY());
+    }
+
+    /**
+     * Creates a visual representation of a grid line between two positions.
+     *
+     * @param p1 the start position of the grid line
+     * @param p2 the end position of the grid line
+     * @return a {@link Geometry} representing the grid line
+     */
+    private Geometry gridLine(Position p1, Position p2) {
+        return app.getDraw().makeFatLine(p1, p2, GRID_DEPTH, GRID_COLOR, GRID_LINE_WIDTH);
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/MapViewSynchronizer.java

@@ -0,0 +1,125 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.math.ColorRGBA;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.Shot;
+import pp.util.Position;
+
+/**
+ * Synchronizes the visual representation of the ship map with the game model.
+ * It handles the rendering of ships and shots on the map view, updating the view
+ * whenever changes occur in the model.
+ */
+class MapViewSynchronizer extends ShipMapSynchronizer {
+    // Constants for rendering properties
+    private static final float SHIP_LINE_WIDTH = 6f;
+    private static final float SHOT_DEPTH = -2f;
+    private static final float SHIP_DEPTH = 0f;
+    private static final float INDENT = 4f;
+
+    // Colors used for different visual elements
+    private static final ColorRGBA HIT_COLOR = ColorRGBA.Red;
+    private static final ColorRGBA MISS_COLOR = ColorRGBA.Blue;
+    private static final ColorRGBA SHIP_BORDER_COLOR = ColorRGBA.White;
+    private static final ColorRGBA PREVIEW_COLOR = ColorRGBA.Gray;
+    private static final ColorRGBA ERROR_COLOR = ColorRGBA.Red;
+
+    // The MapView associated with this synchronizer
+    private final MapView view;
+
+    /**
+     * Constructs a new MapViewSynchronizer for the given MapView.
+     * Initializes the synchronizer and adds existing elements from the model to the view.
+     *
+     * @param view the MapView to synchronize with the game model
+     */
+    public MapViewSynchronizer(MapView view) {
+        super(view.getMap(), view.getNode());
+        this.view = view;
+        addExisting();
+    }
+
+    /**
+     * Creates a visual representation of a shot on the map.
+     * A hit shot is represented in red, while a miss is represented in blue.
+     *
+     * @param shot the Shot object representing the shot in the model
+     * @return a Spatial representing the shot on the map
+     */
+    @Override
+    public Spatial visit(Shot shot) {
+        // Convert the shot's model coordinates to view coordinates
+        final Position p1 = view.modelToView(shot.getX(), shot.getY());
+        final Position p2 = view.modelToView(shot.getX() + 1, shot.getY() + 1);
+        final ColorRGBA color = shot.isHit() ? HIT_COLOR : MISS_COLOR;
+
+        // Create and return a rectangle representing the shot
+        return view.getApp().getDraw().makeRectangle(p1.getX(), p1.getY(),
+                                                     SHOT_DEPTH,
+                                                     p2.getX() - p1.getX(), p2.getY() - p1.getY(),
+                                                     color);
+    }
+
+    /**
+     * Creates a visual representation of a battleship on the map.
+     * The ship's border color depends on its status: normal, valid preview, or invalid preview.
+     *
+     * @param ship the Battleship object representing the ship in the model
+     * @return a Spatial representing the ship on the map
+     */
+    @Override
+    public Spatial visit(Battleship ship) {
+        // Create a node to represent the ship
+        final Node shipNode = new Node("ship"); //NON-NLS
+
+        // Convert the ship's model coordinates to view coordinates
+        final Position p1 = view.modelToView(ship.getMinX(), ship.getMinY());
+        final Position p2 = view.modelToView(ship.getMaxX() + 1, ship.getMaxY() + 1);
+
+        // Calculate the coordinates for the ship's bounding box
+        final float x1 = p1.getX() + INDENT;
+        final float y1 = p1.getY() + INDENT;
+        final float x2 = p2.getX() - INDENT;
+        final float y2 = p2.getY() - INDENT;
+
+        // Determine the color based on the ship's status
+        final ColorRGBA color = switch (ship.getStatus()) {
+            case NORMAL -> SHIP_BORDER_COLOR;
+            case VALID_PREVIEW -> PREVIEW_COLOR;
+            case INVALID_PREVIEW -> ERROR_COLOR;
+        };
+
+        // Add the ship's borders to the node
+        shipNode.attachChild(shipLine(x1, y1, x2, y1, color));
+        shipNode.attachChild(shipLine(x1, y2, x2, y2, color));
+        shipNode.attachChild(shipLine(x1, y1, x1, y2, color));
+        shipNode.attachChild(shipLine(x2, y1, x2, y2, color));
+
+        // Return the complete ship representation
+        return shipNode;
+    }
+
+    /**
+     * Creates a line geometry representing part of the ship's border.
+     *
+     * @param x1    the starting x-coordinate of the line
+     * @param y1    the starting y-coordinate of the line
+     * @param x2    the ending x-coordinate of the line
+     * @param y2    the ending y-coordinate of the line
+     * @param color the color of the line
+     * @return a Geometry representing the line
+     */
+    private Geometry shipLine(float x1, float y1, float x2, float y2, ColorRGBA color) {
+        return view.getApp().getDraw().makeFatLine(x1, y1, x2, y2, SHIP_DEPTH, color, SHIP_LINE_WIDTH);
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/SeaAppState.java

@@ -0,0 +1,203 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.app.Application;
+import com.jme3.app.state.AppStateManager;
+import com.jme3.asset.AssetManager;
+import com.jme3.light.AmbientLight;
+import com.jme3.light.DirectionalLight;
+import com.jme3.material.Material;
+import com.jme3.math.ColorRGBA;
+import com.jme3.math.Vector2f;
+import com.jme3.math.Vector3f;
+import com.jme3.renderer.Camera;
+import com.jme3.renderer.queue.RenderQueue.ShadowMode;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.shape.Box;
+import com.jme3.shadow.DirectionalLightShadowRenderer;
+import com.jme3.shadow.EdgeFilteringMode;
+import com.jme3.texture.Texture;
+import com.jme3.util.SkyFactory;
+import com.jme3.util.TangentBinormalGenerator;
+import pp.battleship.client.BattleshipAppState;
+import pp.battleship.model.ShipMap;
+import pp.util.FloatMath;
+
+import static pp.util.FloatMath.TWO_PI;
+import static pp.util.FloatMath.cos;
+import static pp.util.FloatMath.sin;
+import static pp.util.FloatMath.sqrt;
+
+/**
+ * Manages the rendering and visual aspects of the sea and sky in the Battleship game.
+ * This state is responsible for setting up and updating the sea, sky, and lighting
+ * conditions, and controls the camera to create a dynamic view of the game environment.
+ */
+public class SeaAppState extends BattleshipAppState {
+    /**
+     * The path to the sea texture material.
+     */
+    private static final String SEA_TEXTURE = "Textures/Terrain/Water/Water.j3m"; //NON-NLS
+    private static final float ABOVE_SEA_LEVEL = 4f;
+    private static final float INCLINATION = 2.5f;
+
+    /**
+     * The root node for all visual elements in this state.
+     */
+    private final Node viewNode = new Node("view"); //NON-NLS
+
+    /**
+     * The node containing the scene elements, such as the sea surface.
+     */
+    private final Node sceneNode = new Node("scene"); //NON-NLS
+
+    /**
+     * Synchronizes the sea's visual representation with the game logic.
+     */
+    private SeaSynchronizer synchronizer;
+
+    /**
+     * The current angle of the camera around the center of the map.
+     */
+    private float cameraAngle;
+
+    /**
+     * Initializes the state by setting up the sky, lights, and other visual components.
+     * This method is called when the state is first attached to the state manager.
+     *
+     * @param stateManager the state manager
+     * @param application  the application
+     */
+    @Override
+    public void initialize(AppStateManager stateManager, Application application) {
+        super.initialize(stateManager, application);
+        viewNode.attachChild(sceneNode);
+        setupLights();
+        setupSky();
+    }
+
+    /**
+     * Enables the sea and sky state, setting up the scene and registering any necessary listeners.
+     * This method is called when the state is set to active.
+     */
+    @Override
+    protected void enableState() {
+        sceneNode.detachAllChildren();
+        setupScene();
+        if (synchronizer == null) {
+            synchronizer = new SeaSynchronizer(getApp(), sceneNode, getGameLogic().getOwnMap());
+            getGameLogic().addListener(synchronizer);
+        }
+        getApp().getRootNode().attachChild(viewNode);
+    }
+
+    /**
+     * Disables the sea and sky state, removing visual elements from the scene and unregistering listeners.
+     * This method is called when the state is set to inactive.
+     */
+    @Override
+    protected void disableState() {
+        getApp().getRootNode().detachChild(viewNode);
+        if (synchronizer != null) {
+            getGameLogic().removeListener(synchronizer);
+            synchronizer = null;
+        }
+    }
+
+    /**
+     * Updates the state each frame, moving the camera to simulate it circling around the map.
+     *
+     * @param tpf the time per frame (seconds)
+     */
+    @Override
+    public void update(float tpf) {
+        super.update(tpf);
+        cameraAngle += TWO_PI * 0.05f * tpf;
+        adjustCamera();
+    }
+
+    /**
+     * Sets up the lighting for the scene, including directional and ambient lights.
+     * Also configures shadows to enhance the visual depth of the scene.
+     */
+    private void setupLights() {
+        final AssetManager assetManager = getApp().getAssetManager();
+        final DirectionalLightShadowRenderer shRend = new DirectionalLightShadowRenderer(assetManager, 2048, 3);
+        shRend.setLambda(0.55f);
+        shRend.setShadowIntensity(0.6f);
+        shRend.setEdgeFilteringMode(EdgeFilteringMode.Bilinear);
+        getApp().getViewPort().addProcessor(shRend);
+
+        final DirectionalLight sun = new DirectionalLight();
+        sun.setDirection(new Vector3f(-1f, -0.7f, -1f).normalizeLocal());
+        viewNode.addLight(sun);
+        shRend.setLight(sun);
+
+        final AmbientLight ambientLight = new AmbientLight(new ColorRGBA(0.3f, 0.3f, 0.3f, 0f));
+        viewNode.addLight(ambientLight);
+    }
+
+    /**
+     * Sets up the sky in the scene using a skybox with textures for all six directions.
+     * This creates a realistic and immersive environment for the sea.
+     */
+    private void setupSky() {
+        final AssetManager assetManager = getApp().getAssetManager();
+        final Texture west = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_west.jpg"); //NON-NLS
+        final Texture east = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_east.jpg"); //NON-NLS
+        final Texture north = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_north.jpg"); //NON-NLS
+        final Texture south = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_south.jpg"); //NON-NLS
+        final Texture up = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_up.jpg"); //NON-NLS
+        final Texture down = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_down.jpg"); //NON-NLS
+        final Spatial sky = SkyFactory.createSky(assetManager, west, east, north, south, up, down);
+        sky.rotate(0f, FloatMath.PI, 0f);
+        viewNode.attachChild(sky);
+    }
+
+    /**
+     * Sets up the sea surface in the scene. This includes creating the sea mesh,
+     * applying textures, and enabling shadows.
+     */
+    private void setupScene() {
+        final ShipMap ownMap = getGameLogic().getOwnMap();
+        final float x = 0.5f * ownMap.getWidth();
+        final float y = 0.5f * ownMap.getHeight();
+        final Box seaMesh = new Box(y + 0.5f, 0.1f, x + 0.5f);
+        final Geometry seaGeo = new Geometry("sea", seaMesh); //NON-NLS
+        seaGeo.setLocalTranslation(new Vector3f(y, -0.1f, x));
+        seaMesh.scaleTextureCoordinates(new Vector2f(4f, 4f));
+        final Material seaMat = getApp().getAssetManager().loadMaterial(SEA_TEXTURE);
+        seaGeo.setMaterial(seaMat);
+        seaGeo.setShadowMode(ShadowMode.CastAndReceive);
+        TangentBinormalGenerator.generate(seaGeo);
+        sceneNode.attachChild(seaGeo);
+    }
+
+    /**
+     * Adjusts the camera position and orientation to create a circular motion around
+     * the center of the map. This provides a dynamic view of the sea and surrounding environment.
+     */
+    private void adjustCamera() {
+        final ShipMap ownMap = getGameLogic().getOwnMap();
+        final float mx = 0.5f * ownMap.getWidth();
+        final float my = 0.5f * ownMap.getHeight();
+        final float radius = 2f * sqrt(mx * mx + my + my);
+        final float cos = radius * cos(cameraAngle);
+        final float sin = radius * sin(cameraAngle);
+        final float x = mx - cos;
+        final float y = my - sin;
+        final Camera camera = getApp().getCamera();
+        camera.setLocation(new Vector3f(y, ABOVE_SEA_LEVEL, x));
+        camera.getRotation().lookAt(new Vector3f(sin, -INCLINATION, cos),
+                                    Vector3f.UNIT_Y);
+        camera.update();
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/SeaSynchronizer.java

@@ -0,0 +1,213 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.material.Material;
+import com.jme3.material.RenderState.BlendMode;
+import com.jme3.math.ColorRGBA;
+import com.jme3.renderer.queue.RenderQueue.ShadowMode;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.shape.Box;
+import com.jme3.scene.shape.Cylinder;
+import pp.battleship.client.BattleshipApp;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.Rotation;
+import pp.battleship.model.ShipMap;
+import pp.battleship.model.Shot;
+
+import static java.util.Objects.requireNonNull;
+import static pp.util.FloatMath.HALF_PI;
+import static pp.util.FloatMath.PI;
+
+/**
+ * The {@code SeaSynchronizer} class is responsible for synchronizing the graphical
+ * representation of the ships and shots on the sea map with the underlying data model.
+ * It extends the {@link ShipMapSynchronizer} to provide specific synchronization
+ * logic for the sea map.
+ */
+class SeaSynchronizer extends ShipMapSynchronizer {
+    private static final String UNSHADED = "Common/MatDefs/Misc/Unshaded.j3md"; //NON-NLS
+    private static final String KING_GEORGE_V_MODEL = "Models/KingGeorgeV/KingGeorgeV.j3o"; //NON-NLS
+    private static final String COLOR = "Color"; //NON-NLS
+    private static final String SHIP = "ship"; //NON-NLS
+    private static final String SHOT = "shot"; //NON-NLS
+    private static final ColorRGBA BOX_COLOR = ColorRGBA.Gray;
+    private static final ColorRGBA SPLASH_COLOR = new ColorRGBA(0f, 0f, 1f, 0.4f);
+    private static final ColorRGBA HIT_COLOR = new ColorRGBA(1f, 0f, 0f, 0.4f);
+
+    private final ShipMap map;
+    private final BattleshipApp app;
+
+    /**
+     * Constructs a {@code SeaSynchronizer} object with the specified application, root node, and ship map.
+     *
+     * @param app  the Battleship application
+     * @param root the root node to which graphical elements will be attached
+     * @param map  the ship map containing the ships and shots
+     */
+    public SeaSynchronizer(BattleshipApp app, Node root, ShipMap map) {
+        super(app.getGameLogic().getOwnMap(), root);
+        this.app = app;
+        this.map = map;
+        addExisting();
+    }
+
+    /**
+     * Visits a {@link Shot} and creates a graphical representation of it.
+     * If the shot is a hit, it attaches the representation to the ship node.
+     *
+     * @param shot the shot to be represented
+     * @return the graphical representation of the shot, or null if the shot is a hit
+     * and the representation has been attached to the ship node
+     */
+    @Override
+    public Spatial visit(Shot shot) {
+        return shot.isHit() ? handleHit(shot) : createCylinder(shot);
+    }
+
+    /**
+     * Handles a hit by attaching its representation to the node that
+     * contains the ship model as a child so that it moves with the ship.
+     *
+     * @param shot a hit
+     * @return always null to prevent the representation from being attached
+     * to the items node as well
+     */
+    private Spatial handleHit(Shot shot) {
+        final Battleship ship = requireNonNull(map.findShipAt(shot), "Missing ship");
+        final Node shipNode = requireNonNull((Node) getSpatial(ship), "Missing ship node");
+
+        final Geometry representation = createCylinder(shot);
+        representation.getLocalTranslation().subtractLocal(shipNode.getLocalTranslation());
+        shipNode.attachChild(representation);
+
+        return null;
+    }
+
+    /**
+     * Creates a cylinder geometry representing the specified shot.
+     * The appearance of the cylinder depends on whether the shot is a hit or a miss.
+     *
+     * @param shot the shot to be represented
+     * @return the geometry representing the shot
+     */
+    private Geometry createCylinder(Shot shot) {
+        final ColorRGBA color = shot.isHit() ? HIT_COLOR : SPLASH_COLOR;
+        final float height = shot.isHit() ? 1.2f : 0.1f;
+
+        final Cylinder cylinder = new Cylinder(2, 20, 0.45f, height, true);
+        final Geometry geometry = new Geometry(SHOT, cylinder);
+
+        geometry.setMaterial(createColoredMaterial(color));
+        geometry.rotate(HALF_PI, 0f, 0f);
+        // compute the center of the shot in world coordinates
+        geometry.setLocalTranslation(shot.getY() + 0.5f, 0f, shot.getX() + 0.5f);
+
+        return geometry;
+    }
+
+    /**
+     * Visits a {@link Battleship} and creates a graphical representation of it.
+     * The representation is either a 3D model or a simple box depending on the
+     * type of battleship.
+     *
+     * @param ship the battleship to be represented
+     * @return the node containing the graphical representation of the battleship
+     */
+    @Override
+    public Spatial visit(Battleship ship) {
+        final Node node = new Node(SHIP);
+        node.attachChild(createShip(ship));
+        // compute the center of the ship in world coordinates
+        final float x = 0.5f * (ship.getMinY() + ship.getMaxY() + 1f);
+        final float z = 0.5f * (ship.getMinX() + ship.getMaxX() + 1f);
+        node.setLocalTranslation(x, 0f, z);
+        node.addControl(new ShipControl(ship));
+        return node;
+    }
+
+    /**
+     * Creates the appropriate graphical representation of the specified battleship.
+     * The representation is either a detailed model or a simple box based on the length of the ship.
+     *
+     * @param ship the battleship to be represented
+     * @return the spatial representing the battleship
+     */
+    private Spatial createShip(Battleship ship) {
+        return ship.getLength() == 4 ? createBattleship(ship) : createBox(ship);
+    }
+
+    /**
+     * Creates a simple box to represent a battleship that is not of the "King George V" type.
+     *
+     * @param ship the battleship to be represented
+     * @return the geometry representing the battleship as a box
+     */
+    private Spatial createBox(Battleship ship) {
+        final Box box = new Box(0.5f * (ship.getMaxY() - ship.getMinY()) + 0.3f,
+                                0.3f,
+                                0.5f * (ship.getMaxX() - ship.getMinX()) + 0.3f);
+        final Geometry geometry = new Geometry(SHIP, box);
+        geometry.setMaterial(createColoredMaterial(BOX_COLOR));
+        geometry.setShadowMode(ShadowMode.CastAndReceive);
+
+        return geometry;
+    }
+
+    /**
+     * Creates a new {@link Material} with the specified color.
+     * If the color includes transparency (i.e., alpha value less than 1),
+     * the material's render state is set to use alpha blending, allowing for
+     * semi-transparent rendering.
+     *
+     * @param color the {@link ColorRGBA} to be applied to the material. If the alpha value
+     *              of the color is less than 1, the material will support transparency.
+     * @return a {@link Material} instance configured with the specified color and,
+     * if necessary, alpha blending enabled.
+     */
+    private Material createColoredMaterial(ColorRGBA color) {
+        final Material material = new Material(app.getAssetManager(), UNSHADED);
+        if (color.getAlpha() < 1f)
+            material.getAdditionalRenderState().setBlendMode(BlendMode.Alpha);
+        material.setColor(COLOR, color);
+        return material;
+    }
+
+    /**
+     * Creates a detailed 3D model to represent a "King George V" battleship.
+     *
+     * @param ship the battleship to be represented
+     * @return the spatial representing the "King George V" battleship
+     */
+    private Spatial createBattleship(Battleship ship) {
+        final Spatial model = app.getAssetManager().loadModel(KING_GEORGE_V_MODEL);
+
+        model.rotate(-HALF_PI, calculateRotationAngle(ship.getRot()), 0f);
+        model.scale(1.48f);
+        model.setShadowMode(ShadowMode.CastAndReceive);
+
+        return model;
+    }
+
+    /**
+     * Calculates the rotation angle for the specified rotation.
+     *
+     * @param rot the rotation of the battleship
+     * @return the rotation angle in radians
+     */
+    private static float calculateRotationAngle(Rotation rot) {
+        return switch (rot) {
+            case RIGHT -> HALF_PI;
+            case DOWN -> 0f;
+            case LEFT -> -HALF_PI;
+            case UP -> PI;
+        };
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/ShipControl.java

@@ -0,0 +1,106 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.jme3.renderer.RenderManager;
+import com.jme3.renderer.ViewPort;
+import com.jme3.scene.control.AbstractControl;
+import pp.battleship.model.Battleship;
+
+import static pp.util.FloatMath.DEG_TO_RAD;
+import static pp.util.FloatMath.TWO_PI;
+import static pp.util.FloatMath.sin;
+
+/**
+ * Controls the oscillating pitch motion of a battleship model in the game.
+ * The ship oscillates to simulate a realistic movement on water, based on its orientation and length.
+ */
+class ShipControl extends AbstractControl {
+    /**
+     * The axis of rotation for the ship's pitch (tilting forward and backward).
+     */
+    private final Vector3f axis;
+
+    /**
+     * The duration of one complete oscillation cycle in seconds.
+     */
+    private final float cycle;
+
+    /**
+     * The amplitude of the pitch oscillation in radians, determining how much the ship tilts.
+     */
+    private final float amplitude;
+
+    /**
+     * A quaternion representing the ship's current pitch rotation.
+     */
+    private final Quaternion pitch = new Quaternion();
+
+    /**
+     * The current time within the oscillation cycle, used to calculate the ship's pitch angle.
+     */
+    private float time;
+
+    /**
+     * Constructs a new ShipControl instance for the specified Battleship.
+     * The ship's orientation determines the axis of rotation, while its length influences
+     * the cycle duration and amplitude of the oscillation.
+     *
+     * @param ship the Battleship object to control
+     */
+    public ShipControl(Battleship ship) {
+        // Determine the axis of rotation based on the ship's orientation
+        axis = switch (ship.getRot()) {
+            case LEFT, RIGHT -> Vector3f.UNIT_X;
+            case UP, DOWN -> Vector3f.UNIT_Z;
+        };
+
+        // Set the cycle duration and amplitude based on the ship's length
+        cycle = ship.getLength() * 2f;
+        amplitude = 5f * DEG_TO_RAD / ship.getLength();
+    }
+
+    /**
+     * Updates the ship's pitch oscillation each frame. The ship's pitch is adjusted
+     * to create a continuous tilting motion, simulating the effect of waves.
+     *
+     * @param tpf time per frame (in seconds), used to calculate the new pitch angle
+     */
+    @Override
+    protected void controlUpdate(float tpf) {
+        // If spatial is null, do nothing
+        if (spatial == null) return;
+
+        // Update the time within the oscillation cycle
+        time = (time + tpf) % cycle;
+
+        // Calculate the current angle of the oscillation
+        final float angle = amplitude * sin(time * TWO_PI / cycle);
+
+        // Update the pitch Quaternion with the new angle
+        pitch.fromAngleAxis(angle, axis);
+
+        // Apply the pitch rotation to the spatial
+        spatial.setLocalRotation(pitch);
+    }
+
+    /**
+     * This method is called during the rendering phase, but it does not perform any
+     * operations in this implementation as the control only influences the spatial's
+     * transformation, not its rendering process.
+     *
+     * @param rm the RenderManager rendering the controlled Spatial (not null)
+     * @param vp the ViewPort being rendered (not null)
+     */
+    @Override
+    protected void controlRender(RenderManager rm, ViewPort vp) {
+        // No rendering logic is needed for this control
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/ShipMapSynchronizer.java

@@ -0,0 +1,89 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.gui;
+
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import pp.battleship.model.Item;
+import pp.battleship.model.ShipMap;
+import pp.battleship.model.Visitor;
+import pp.battleship.notification.GameEventListener;
+import pp.battleship.notification.ItemAddedEvent;
+import pp.battleship.notification.ItemRemovedEvent;
+import pp.view.ModelViewSynchronizer;
+
+/**
+ * Abstract base class for synchronizing the visual representation of a {@link ShipMap} with its model state.
+ * This class handles the addition and removal of items from the ship map, ensuring that changes in the model
+ * are accurately reflected in the view.
+ * <p>
+ * Subclasses are responsible for providing the specific implementation of how each item in the map
+ * is represented visually by implementing the {@link Visitor} interface.
+ * </p>
+ */
+abstract class ShipMapSynchronizer extends ModelViewSynchronizer<Item> implements Visitor<Spatial>, GameEventListener {
+    // The ship map that this synchronizer is responsible for
+    private final ShipMap shipMap;
+
+    /**
+     * Constructs a new ShipMapSynchronizer.
+     * Initializes the synchronizer with the provided ship map and the root node for attaching view representations.
+     *
+     * @param map  the ship map to be synchronized
+     * @param root the root node to which the view representations of the ship map items are attached
+     */
+    protected ShipMapSynchronizer(ShipMap map, Node root) {
+        super(root);
+        this.shipMap = map;
+    }
+
+    /**
+     * Translates a model item into its corresponding visual representation.
+     * The specific visual representation is determined by the concrete implementation of the {@link Visitor} interface.
+     *
+     * @param item the item from the model to be translated
+     * @return the visual representation of the item as a {@link Spatial}
+     */
+    @Override
+    protected Spatial translate(Item item) {
+        return item.accept(this);
+    }
+
+    /**
+     * Adds the existing items from the ship map to the view.
+     * This method should be called during initialization to ensure that all current items in the ship map
+     * are visually represented.
+     */
+    protected void addExisting() {
+        shipMap.getItems().forEach(this::add);
+    }
+
+    /**
+     * Handles the event when an item is removed from the ship map.
+     * Removes the visual representation of the item from the view if it belongs to the synchronized ship map.
+     *
+     * @param event the event indicating that an item has been removed from the ship map
+     */
+    @Override
+    public void receivedEvent(ItemRemovedEvent event) {
+        if (shipMap == event.map())
+            delete(event.item());
+    }
+
+    /**
+     * Handles the event when an item is added to the ship map.
+     * Adds the visual representation of the new item to the view if it belongs to the synchronized ship map.
+     *
+     * @param event the event indicating that an item has been added to the ship map
+     */
+    @Override
+    public void receivedEvent(ItemAddedEvent event) {
+        if (shipMap == event.map())
+            add(event.item());
+    }
+}

Projekte/battleship/client/src/main/resources/Models/KingGeorgeV/README.txt

@@ -0,0 +1,3 @@
+based on:
+https://free3d.com/3d-model/wwii-ship-uk-king-george-v-class-battleship-v1--185381.html
+License: Free Personal Use Only

Projekte/battleship/client/src/main/resources/Textures/Terrain/Water/README.txt

@@ -0,0 +1,4 @@
+based on:
+water 002
+by Katsukagi on 29/11/2018
+https://3dtextures.me/2018/11/29/water-002/

Projekte/battleship/client/src/main/resources/Textures/Terrain/Water/Water.j3m

@@ -0,0 +1,14 @@
+Material Water : Common/MatDefs/Light/Lighting.j3md {
+     MaterialParameters {
+         Shininess            : 64
+         DiffuseMap           : Repeat Textures/Terrain/Water/Water_002_COLOR.jpg
+         NormalMap            : Repeat Textures/Terrain/Water/Water_002_NORM.jpg
+         SpecularMap          : Repeat Textures/Terrain/Water/Water_002_ROUGH.jpg
+         ParallaxMap          : Repeat Textures/Terrain/Water/Water_002_DISP.png
+         // PackedNormalParallax : true
+         // UseMaterialColors : true
+         Ambient  : 0.5 0.5 0.5 1.0
+         Diffuse  : 1.0 1.0 1.0 1.0
+         Specular : 1.0 1.0 1.0 1.0
+     }
+}

Projekte/battleship/converter/build.gradle

@@ -0,0 +1,16 @@
+plugins {
+    id 'buildlogic.jme-application-conventions'
+}
+
+description = 'Battleship converter for resources'
+
+dependencies {
+    implementation libs.jme3.core
+
+    runtimeOnly libs.jme3.desktop
+    runtimeOnly libs.jme3.plugins
+}
+
+application {
+    mainClass = 'pp.battleship.exporter.ModelExporter'
+}

Projekte/battleship/converter/src/main/java/pp/battleship/exporter/ModelExporter.java

@@ -0,0 +1,69 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.exporter;
+
+import com.jme3.app.SimpleApplication;
+import com.jme3.export.JmeExporter;
+import com.jme3.export.binary.BinaryExporter;
+import com.jme3.scene.Spatial;
+import com.jme3.system.JmeContext;
+import com.jme3.util.TangentBinormalGenerator;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+
+/**
+ * This class transforms models into j3o format.
+ */
+public class ModelExporter extends SimpleApplication {
+    private static final Logger LOGGER = System.getLogger(ModelExporter.class.getName());
+
+    /**
+     * The main method of the converter
+     *
+     * @param args input args
+     */
+    public static void main(String[] args) {
+        ModelExporter application = new ModelExporter();
+        application.start(JmeContext.Type.Headless);
+    }
+
+    /**
+     * Overrides  {@link com.jme3.app.SimpleApplication#simpleInitApp()}.
+     * It initializes a simple app by exporting robots and rocks.
+     */
+    @Override
+    public void simpleInitApp() {
+        export("Models/KingGeorgeV/King_George_V.obj", "KingGeorgeV.j3o"); //NON-NLS
+
+        stop();
+    }
+
+    /**
+     * Exports spatial into a file
+     *
+     * @param fileName       the file name of the model
+     * @param exportFileName the name of the file where the .j3o file is going to be stored
+     */
+    private void export(String fileName, String exportFileName) {
+        final File file = new File(exportFileName);
+        JmeExporter exporter = BinaryExporter.getInstance();
+        try {
+            final Spatial model = getAssetManager().loadModel(fileName);
+            TangentBinormalGenerator.generate(model);
+            exporter.save(model, file);
+        }
+        catch (IOException exception) {
+            LOGGER.log(Level.ERROR, "write to {0} failed", file); //NON-NLS
+            throw new RuntimeException(exception);
+        }
+        LOGGER.log(Level.INFO, "wrote file {0}", file); //NON-NLS
+    }
+}

Projekte/battleship/converter/src/main/resources/Models/KingGeorgeV/King_George_V.mtl

@@ -0,0 +1,18 @@
+# 3ds Max Wavefront OBJ Exporter v0.97b - (c)2007 guruware
+# File Created: 16.03.2012 14:15:53
+
+newmtl _King_George_V
+	Ns 60.0000
+	Ni 1.5000
+	d 1.0000
+	Tr 0.0000
+	Tf 1.0000 1.0000 1.0000 
+	illum 2
+	Ka 1.0000 1.0000 1.0000
+	Kd 1.0000 1.0000 1.0000
+	Ks 0.4500 0.4500 0.4500
+	Ke 0.0000 0.0000 0.0000
+	map_Ka King_George_V.jpg
+	map_Kd King_George_V.jpg
+	map_bump King_George_V_bump.jpg
+	bump King_George_V_bump.jpg

Projekte/battleship/converter/src/main/resources/Models/KingGeorgeV/README.txt

@@ -0,0 +1,3 @@
+based on:
+https://free3d.com/3d-model/wwii-ship-uk-king-george-v-class-battleship-v1--185381.html
+License: Free Personal Use Only

Projekte/battleship/model/build.gradle

@@ -0,0 +1,12 @@
+plugins {
+    id 'buildlogic.java-library-conventions'
+}
+
+description = 'Battleship common model'
+
+dependencies {
+    api project(":common")
+    api libs.jme3.networking
+    implementation libs.gson
+    testImplementation libs.mockito.core
+}

Projekte/battleship/model/src/main/java/pp/battleship/BattleshipConfig.java

@@ -0,0 +1,103 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship;
+
+import pp.util.config.Config;
+
+import java.util.Map;
+import java.util.TreeMap;
+
+import static java.lang.Math.max;
+
+/**
+ * Provides access to the configuration settings for the Battleship game.
+ * <p>
+ * This class allows for loading configuration settings from a properties file,
+ * including the server port, map dimensions, and the number of ships of various lengths.
+ * </p>
+ * <p>
+ * <b>Note:</b> Attributes of this class are not marked as {@code final} to allow
+ * for proper initialization when reading from a properties file.
+ * </p>
+ */
+public class BattleshipConfig extends Config {
+
+    /**
+     * The default port number for the Battleship server.
+     */
+    @Property("port")
+    private int port = 1234;
+
+    /**
+     * The width of the game map in terms of grid units.
+     */
+    @Property("map.width")
+    private int mapWidth = 10;
+
+    /**
+     * The height of the game map in terms of grid units.
+     */
+    @Property("map.height")
+    private int mapHeight = 10;
+
+    /**
+     * An array representing the number of ships available for each length.
+     * The index corresponds to the ship length minus one, and the value at each index
+     * is the number of ships of that length.
+     */
+    @Property("ship.nums")
+    private int[] shipNums = {4, 3, 2, 1};
+
+    /**
+     * Creates an instance of {@code BattleshipConfig} with default settings.
+     */
+    public BattleshipConfig() {
+        // Default constructor
+    }
+
+    /**
+     * Returns the port number configured for the Battleship server.
+     *
+     * @return the port number
+     */
+    public int getPort() {
+        return port;
+    }
+
+    /**
+     * Returns the width of the game map. The width is guaranteed to be at least 2 units.
+     *
+     * @return the width of the game map
+     */
+    public int getMapWidth() {
+        return max(mapWidth, 2);
+    }
+
+    /**
+     * Returns the height of the game map. The height is guaranteed to be at least 2 units.
+     *
+     * @return the height of the game map
+     */
+    public int getMapHeight() {
+        return max(mapHeight, 2);
+    }
+
+    /**
+     * Returns a map representing the number of ships for each length.
+     * The keys are ship lengths, and the values are the corresponding number of ships.
+     *
+     * @return a map of ship lengths to the number of ships
+     */
+    public Map<Integer, Integer> getShipNums() {
+        final TreeMap<Integer, Integer> ships = new TreeMap<>();
+        for (int i = 0; i < shipNums.length; i++)
+            if (shipNums[i] > 0)
+                ships.put(i + 1, shipNums[i]);
+        return ships;
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/Resources.java

@@ -0,0 +1,40 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship;
+
+import java.util.ResourceBundle;
+
+/**
+ * Provides access to the resource bundle of the game.
+ *
+ * @see #BUNDLE
+ */
+public class Resources {
+    /**
+     * The resource bundle for the Battleship game.
+     */
+    public static final ResourceBundle BUNDLE = ResourceBundle.getBundle("battleship"); //NON-NLS
+
+    /**
+     * Gets a string for the given key from the resource bundle in {@linkplain #BUNDLE}.
+     *
+     * @param key the key for the desired string
+     * @return the string for the given key
+     * @throws NullPointerException               if {@code key} is {@code null}
+     * @throws java.util.MissingResourceException if no object for the given key can be found
+     * @throws ClassCastException                 if the object found for the given key is not a string
+     */
+    public static String lookup(String key) {
+        return BUNDLE.getString(key);
+    }
+
+    /**
+     * Private constructor to prevent instantiation.
+     */
+    private Resources() { /* do not instantiate */ }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/BattleState.java

@@ -0,0 +1,102 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.client.ShootMessage;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.ShipMap;
+import pp.battleship.notification.Sound;
+
+import java.lang.System.Logger.Level;
+
+/**
+ * Represents the state of the client where players take turns to attack each other's ships.
+ */
+class BattleState extends ClientState {
+    private boolean myTurn;
+
+    /**
+     * Constructs a new instance of {@link BattleState}.
+     *
+     * @param logic  the game logic
+     * @param myTurn true if it is my turn
+     */
+    public BattleState(ClientGameLogic logic, boolean myTurn) {
+        super(logic);
+        this.myTurn = myTurn;
+    }
+
+    @Override
+    public boolean showBattle() {
+        return true;
+    }
+
+    @Override
+    public void clickOpponentMap(IntPoint pos) {
+        if (!myTurn)
+            logic.setInfoText("wait.its.not.your.turn");
+        else if (logic.getOpponentMap().isValid(pos))
+            logic.send(new ShootMessage(pos));
+    }
+
+    /**
+     * Reports the effect of a shot based on the server message.
+     *
+     * @param msg the message containing the effect of the shot
+     */
+    @Override
+    public void receivedEffect(EffectMessage msg) {
+        ClientGameLogic.LOGGER.log(Level.INFO, "report effect: {0}", msg); //NON-NLS
+        playSound(msg);
+        myTurn = msg.isMyTurn();
+        logic.setInfoText(msg.getInfoTextKey());
+        affectedMap(msg).add(msg.getShot());
+        if (destroyedOpponentShip(msg))
+            logic.getOpponentMap().add(msg.getDestroyedShip());
+        if (msg.isGameOver()) {
+            msg.getRemainingOpponentShips().forEach(logic.getOwnMap()::add);
+            logic.setState(new GameOverState(logic));
+        }
+    }
+
+    /**
+     * Determines which map (own or opponent's) should be affected by the shot based on the message.
+     *
+     * @param msg the effect message received from the server
+     * @return the map (either the opponent's or player's own map) that is affected by the shot
+     */
+    private ShipMap affectedMap(EffectMessage msg) {
+        return msg.isOwnShot() ? logic.getOpponentMap() : logic.getOwnMap();
+    }
+
+    /**
+     * Checks if the opponent's ship was destroyed by the player's shot.
+     *
+     * @param msg the effect message received from the server
+     * @return true if the shot destroyed an opponent's ship, false otherwise
+     */
+    private boolean destroyedOpponentShip(EffectMessage msg) {
+        return msg.getDestroyedShip() != null && msg.isOwnShot();
+    }
+
+    /**
+     * Plays a sound based on the outcome of the shot. Different sounds are played for a miss, hit,
+     * or destruction of a ship.
+     *
+     * @param msg the effect message containing the result of the shot
+     */
+    private void playSound(EffectMessage msg) {
+        if (!msg.getShot().isHit())
+            logic.playSound(Sound.SPLASH);
+        else if (msg.getDestroyedShip() == null)
+            logic.playSound(Sound.EXPLOSION);
+        else
+            logic.playSound(Sound.DESTROYED_SHIP);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/BattleshipClient.java

@@ -0,0 +1,38 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.game.singlemode.BattleshipClientConfig;
+
+/**
+ * Interface representing a Battleship client.
+ * Provides methods to access game logic, configuration, and to enqueue tasks.
+ */
+public interface BattleshipClient {
+
+    /**
+     * Returns the game logic associated with this client.
+     *
+     * @return the ClientGameLogic instance
+     */
+    ClientGameLogic getGameLogic();
+
+    /**
+     * Returns the configuration associated with this client.
+     *
+     * @return the BattleshipConfig instance
+     */
+    BattleshipClientConfig getConfig();
+
+    /**
+     * Enqueues a task to be executed by the client.
+     *
+     * @param runnable the task to be executed
+     */
+    void enqueue(Runnable runnable);
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/ClientGameLogic.java

@@ -0,0 +1,355 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.client.ClientMessage;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.ServerInterpreter;
+import pp.battleship.message.server.StartBattleMessage;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.ShipMap;
+import pp.battleship.model.dto.ShipMapDTO;
+import pp.battleship.notification.ClientStateEvent;
+import pp.battleship.notification.GameEvent;
+import pp.battleship.notification.GameEventBroker;
+import pp.battleship.notification.GameEventListener;
+import pp.battleship.notification.InfoTextEvent;
+import pp.battleship.notification.Sound;
+import pp.battleship.notification.SoundEvent;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.lang.Math.max;
+
+/**
+ * Controls the client-side game logic for Battleship.
+ * Manages the player's ship placement, interactions with the map, and response to server messages.
+ */
+public class ClientGameLogic implements ServerInterpreter, GameEventBroker {
+    static final Logger LOGGER = System.getLogger(ClientGameLogic.class.getName());
+    private final ClientSender clientSender;
+    private final List<GameEventListener> listeners = new ArrayList<>();
+    private GameDetails details;
+    private ShipMap ownMap;
+    private ShipMap harbor;
+    private ShipMap opponentMap;
+    private ClientState state = new InitialState(this);
+
+    /**
+     * Constructs a ClientGameLogic with the specified sender object.
+     *
+     * @param clientSender the object used to send messages to the server
+     */
+    public ClientGameLogic(ClientSender clientSender) {
+        this.clientSender = clientSender;
+    }
+
+    /**
+     * Returns the current state of the game logic.
+     */
+    ClientState getState() {
+        return state;
+    }
+
+    /**
+     * Sets the current state of the game logic.
+     *
+     * @param newState the new state to be set
+     */
+    void setState(ClientState newState) {
+        LOGGER.log(Level.DEBUG, "state transition {0} --> {1}", state.getName(), newState.getName()); //NON-NLS
+        state = newState;
+        notifyListeners(new ClientStateEvent());
+        state.entry();
+    }
+
+    /**
+     * Returns the game details.
+     *
+     * @return the game details
+     */
+    GameDetails getDetails() {
+        return details;
+    }
+
+    /**
+     * Returns the player's own map.
+     *
+     * @return the player's own map
+     */
+    public ShipMap getOwnMap() {
+        return ownMap;
+    }
+
+    /**
+     * Returns the opponent's map.
+     *
+     * @return the opponent's map
+     */
+    public ShipMap getOpponentMap() {
+        return opponentMap;
+    }
+
+    /**
+     * Returns the harbor map.
+     *
+     * @return the harbor map
+     */
+    public ShipMap getHarbor() {
+        return harbor;
+    }
+
+    /**
+     * Checks if the editor should be shown.
+     *
+     * @return true if the editor should be shown, false otherwise
+     */
+    public boolean showEditor() {
+        return state.showEditor();
+    }
+
+    /**
+     * Checks if the battle state should be shown.
+     *
+     * @return true if the battle state should be shown, false otherwise
+     */
+    public boolean showBattle() {
+        return state.showBattle();
+    }
+
+    /**
+     * Sets the game details provided by the server.
+     *
+     * @param details the game details including map size and ships
+     */
+    @Override
+    public void received(GameDetails details) {
+        state.receivedGameDetails(details);
+    }
+
+    /**
+     * Moves the preview ship to the specified position.
+     *
+     * @param pos the new position for the preview ship
+     */
+    public void movePreview(IntPoint pos) {
+        state.movePreview(pos);
+    }
+
+    /**
+     * Handles a click on the player's own map.
+     *
+     * @param pos the position where the click occurred
+     */
+    public void clickOwnMap(IntPoint pos) {
+        state.clickOwnMap(pos);
+    }
+
+    /**
+     * Handles a click on the harbor map.
+     *
+     * @param pos the position where the click occurred
+     */
+    public void clickHarbor(IntPoint pos) {
+        state.clickHarbor(pos);
+    }
+
+    /**
+     * Handles a click on the opponent's map.
+     *
+     * @param pos the position where the click occurred
+     */
+    public void clickOpponentMap(IntPoint pos) {
+        state.clickOpponentMap(pos);
+    }
+
+    /**
+     * Rotates the preview ship.
+     */
+    public void rotateShip() {
+        state.rotateShip();
+    }
+
+    /**
+     * Marks the player's map as finished.
+     */
+    public void mapFinished() {
+        state.mapFinished();
+    }
+
+    /**
+     * Checks if the player's map is complete (i.e., all ships are placed).
+     *
+     * @return true if all ships are placed, false otherwise
+     */
+    public boolean isMapComplete() {
+        return state.isMapComplete();
+    }
+
+    /**
+     * Checks if there is currently a preview ship.
+     *
+     * @return true if there is currently a preview ship, false otherwise
+     */
+    public boolean movingShip() {
+        return state.movingShip();
+    }
+
+    /**
+     * Starts the battle based on the server message.
+     *
+     * @param msg the message indicating whose turn it is to shoot
+     */
+    @Override
+    public void received(StartBattleMessage msg) {
+        state.receivedStartBattle(msg);
+    }
+
+    /**
+     * Reports the effect of a shot based on the server message.
+     *
+     * @param msg the message containing the effect of the shot
+     */
+    @Override
+    public void received(EffectMessage msg) {
+        state.receivedEffect(msg);
+    }
+
+    /**
+     * Initializes the player's own map, opponent's map, and harbor based on the game details.
+     *
+     * @param details the game details including map size and ships
+     */
+    void initializeMaps(GameDetails details) {
+        this.details = details;
+        final int numShips = details.getShipNums().values().stream().mapToInt(Integer::intValue).sum();
+        final int maxLength = details.getShipNums().keySet().stream().mapToInt(Integer::intValue).max().orElse(2);
+        ownMap = new ShipMap(details.getWidth(), details.getHeight(), this);
+        opponentMap = new ShipMap(details.getWidth(), details.getHeight(), this);
+        harbor = new ShipMap(max(maxLength, 2), max(numShips, details.getHeight()), this);
+    }
+
+    /**
+     * Sets the informational text to be displayed to the player.
+     *
+     * @param key the key for the info text
+     */
+    void setInfoText(String key) {
+        notifyListeners(new InfoTextEvent(key));
+    }
+
+    /**
+     * Emits an event to play the specified sound.
+     *
+     * @param sound the sound to be played.
+     */
+    public void playSound(Sound sound) {
+        notifyListeners(new SoundEvent(sound));
+    }
+
+    /**
+     * Loads a map from the specified file.
+     *
+     * @param file the file to load the map from
+     * @throws IOException if an I/O error occurs
+     */
+    public void loadMap(File file) throws IOException {
+        state.loadMap(file);
+    }
+
+    /**
+     * Checks if the player's own map may be loaded from a file.
+     *
+     * @return true if the own map may be loaded from file, false otherwise
+     */
+    public boolean mayLoadMap() {
+        return state.mayLoadMap();
+    }
+
+    /**
+     * Checks if the player's own map may be saved to a file.
+     *
+     * @return true if the own map may be saved to file, false otherwise
+     */
+    public boolean maySaveMap() {
+        return state.maySaveMap();
+    }
+
+    /**
+     * Saves the player's own map to the specified file.
+     *
+     * @param file the file to save the map to
+     * @throws IOException if the map cannot be saved in the current state
+     */
+    public void saveMap(File file) throws IOException {
+        if (ownMap != null && maySaveMap())
+            new ShipMapDTO(ownMap).saveTo(file);
+        else
+            throw new IOException("You are not allowed to save the map in this state of the game");
+    }
+
+    /**
+     * Sends a message to the server.
+     *
+     * @param msg the message to be sent
+     */
+    void send(ClientMessage msg) {
+        if (clientSender == null)
+            LOGGER.log(Level.ERROR, "trying to send {0} with sender==null", msg); //NON-NLS
+        else
+            clientSender.send(msg);
+    }
+
+    /**
+     * Adds a listener to receive game events.
+     *
+     * @param listener the listener to add
+     */
+    public synchronized void addListener(GameEventListener listener) {
+        listeners.add(listener);
+    }
+
+    /**
+     * Removes a listener from receiving game events.
+     *
+     * @param listener the listener to remove
+     */
+    public synchronized void removeListener(GameEventListener listener) {
+        listeners.remove(listener);
+    }
+
+    /**
+     * Notifies all listeners of a game event.
+     *
+     * @param event the game event to notify listeners of
+     */
+    @Override
+    public void notifyListeners(GameEvent event) {
+        final List<GameEventListener> copy;
+        synchronized (this) {
+            copy = new ArrayList<>(listeners);
+        }
+        for (GameEventListener listener : copy)
+            event.notifyListener(listener);
+    }
+
+    /**
+     * Called once per frame by the update loop.
+     *
+     * @param delta time in seconds since the last update call
+     */
+    public void update(float delta) {
+        state.update(delta);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/ClientSender.java

@@ -0,0 +1,22 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.client.ClientMessage;
+
+/**
+ * Interface for sending messages to the server.
+ */
+public interface ClientSender {
+    /**
+     * Send the specified message to the server.
+     *
+     * @param message the message
+     */
+    void send(ClientMessage message);
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/ClientState.java

@@ -0,0 +1,202 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.StartBattleMessage;
+import pp.battleship.model.IntPoint;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.System.Logger.Level;
+
+/**
+ * Defines the behavior and state transitions for the client-side game logic.
+ * Different states of the game logic implement this interface to handle various game events and actions.
+ */
+abstract class ClientState {
+    /**
+     * The game logic object.
+     */
+    final ClientGameLogic logic;
+
+    /**
+     * Constructs a client state of the specified game logic.
+     *
+     * @param logic the game logic
+     */
+    ClientState(ClientGameLogic logic) {
+        this.logic = logic;
+    }
+
+    /**
+     * Method to be overridden by subclasses for post-transition initialization.
+     * By default, it does nothing, but it can be overridden in derived states.
+     */
+    void entry() {
+        // Default implementation does nothing
+    }
+
+    /**
+     * Returns the name of the current state.
+     *
+     * @return the name of the current state
+     */
+    String getName() {
+        return getClass().getSimpleName();
+    }
+
+    /**
+     * Checks if the editor should be shown.
+     *
+     * @return true if the editor should be shown, false otherwise
+     */
+    boolean showEditor() {
+        return false;
+    }
+
+    /**
+     * Checks if the battle state should be shown.
+     *
+     * @return true if the battle state should be shown, false otherwise
+     */
+    boolean showBattle() {
+        return false;
+    }
+
+    /**
+     * Checks if the player's map is complete (i.e., all ships are placed).
+     *
+     * @return true if all ships are placed, false otherwise
+     */
+    boolean isMapComplete() {
+        return false;
+    }
+
+    /**
+     * Checks if there is currently a preview ship.
+     *
+     * @return true if there is currently a preview ship, false otherwise
+     */
+    boolean movingShip() {
+        return false;
+    }
+
+    /**
+     * Handles a click on the player's own map.
+     *
+     * @param pos the position where the click occurred
+     */
+    void clickOwnMap(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "clickOwnMap has no effect in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Handles a click on the harbor map.
+     *
+     * @param pos the position where the click occurred
+     */
+    void clickHarbor(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "clickHarbor has no effect in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Handles a click on the opponent's map.
+     *
+     * @param pos the position where the click occurred
+     */
+    void clickOpponentMap(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "clickOpponentMap has no effect in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Moves the preview ship to the specified position.
+     *
+     * @param pos the new position for the preview ship
+     */
+    void movePreview(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "movePreview has no effect in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Rotates the preview ship.
+     */
+    void rotateShip() {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "rotateShip has no effect in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * The user has marked the map as finished.
+     */
+    void mapFinished() {
+        ClientGameLogic.LOGGER.log(Level.ERROR, "mapFinished not allowed in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Sets the game details provided by the server.
+     *
+     * @param details the game details including map size and ships
+     */
+    void receivedGameDetails(GameDetails details) {
+        ClientGameLogic.LOGGER.log(Level.ERROR, "receivedGameDetails not allowed in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Starts the battle based on the server message.
+     *
+     * @param msg the message indicating whose turn it is to shoot
+     */
+    void receivedStartBattle(StartBattleMessage msg) {
+        ClientGameLogic.LOGGER.log(Level.ERROR, "receivedStartBattle not allowed in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Reports the effect of a shot based on the server message.
+     *
+     * @param msg the message containing the effect of the shot
+     */
+    void receivedEffect(EffectMessage msg) {
+        ClientGameLogic.LOGGER.log(Level.ERROR, "receivedEffect not allowed in {0}", getName()); //NON-NLS
+    }
+
+    /**
+     * Loads a map from the specified file.
+     *
+     * @param file the file to load the map from
+     * @throws IOException if the map cannot be loaded in the current state
+     */
+    void loadMap(File file) throws IOException {
+        throw new IOException("You are not allowed to load a map in this state of the game");
+    }
+
+    /**
+     * Checks if the own map may be loaded from file.
+     *
+     * @return true if the own map may be loaded from file, false otherwise
+     */
+    boolean mayLoadMap() {
+        return false;
+    }
+
+    /**
+     * Checks if the own map may be saved to file.
+     *
+     * @return true if the own map may be saved to file, false otherwise
+     */
+    boolean maySaveMap() {
+        return true;
+    }
+
+    /**
+     * Called once per frame by the update loop if this state is active.
+     *
+     * @param delta time in seconds since the last update call
+     */
+    void update(float delta) { /* do nothing by default */ }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/EditorState.java

@@ -0,0 +1,267 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.client.MapMessage;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.ShipMap;
+import pp.battleship.model.dto.ShipMapDTO;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.System.Logger.Level;
+
+import static pp.battleship.Resources.lookup;
+import static pp.battleship.model.Battleship.Status.INVALID_PREVIEW;
+import static pp.battleship.model.Battleship.Status.NORMAL;
+import static pp.battleship.model.Battleship.Status.VALID_PREVIEW;
+import static pp.battleship.model.Rotation.RIGHT;
+
+/**
+ * Represents the state of the client setting up the ship map.
+ */
+class EditorState extends ClientState {
+    private Battleship preview;
+    private Battleship selectedInHarbor;
+
+    /**
+     * Constructs a new EditorState with the specified ClientGameLogic.
+     *
+     * @param logic the ClientGameLogic associated with this state
+     */
+    public EditorState(ClientGameLogic logic) {
+        super(logic);
+    }
+
+    /**
+     * Returns true to indicate that the editor should be shown.
+     *
+     * @return true if the editor should be shown
+     */
+    @Override
+    public boolean showEditor() {
+        return true;
+    }
+
+    /**
+     * Moves the preview ship to the specified position.
+     *
+     * @param pos the new position for the preview ship
+     */
+    @Override
+    public void movePreview(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "move preview to {0}", pos); //NON-NLS
+        if (preview == null || !ownMap().isValid(pos)) return;
+        preview.moveTo(pos);
+        setPreviewStatus(preview);
+        ownMap().remove(preview);
+        ownMap().add(preview);
+    }
+
+    /**
+     * Handles a click on the player's own map.
+     *
+     * @param pos the position where the click occurred
+     */
+    @Override
+    public void clickOwnMap(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "click at {0} in own map", pos); //NON-NLS
+        if (!ownMap().isValid(pos)) return;
+        if (preview == null)
+            modifyShip(pos);
+        else
+            placeShip(pos);
+    }
+
+    /**
+     * Modifies a ship on the map at the specified position.
+     *
+     * @param cursor the position of the ship to modify
+     */
+    private void modifyShip(IntPoint cursor) {
+        preview = ownMap().findShipAt(cursor);
+        if (preview == null)
+            return;
+        preview.moveTo(cursor);
+        setPreviewStatus(preview);
+        ownMap().remove(preview);
+        ownMap().add(preview);
+        selectedInHarbor = new Battleship(preview.getLength(), 0, freeY(), RIGHT);
+        selectedInHarbor.setStatus(VALID_PREVIEW);
+        harbor().add(selectedInHarbor);
+    }
+
+    /**
+     * Places the preview ship at the specified position.
+     *
+     * @param cursor the position to place the ship
+     */
+    private void placeShip(IntPoint cursor) {
+        ownMap().remove(preview);
+        preview.moveTo(cursor);
+        if (ownMap().isValid(preview)) {
+            preview.setStatus(NORMAL);
+            ownMap().add(preview);
+            harbor().remove(selectedInHarbor);
+            preview = null;
+            selectedInHarbor = null;
+        }
+        else {
+            preview.setStatus(INVALID_PREVIEW);
+            ownMap().add(preview);
+        }
+    }
+
+    /**
+     * Handles a click on the harbor map.
+     *
+     * @param pos the position where the click occurred
+     */
+    @Override
+    public void clickHarbor(IntPoint pos) {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "click at {0} in harbor", pos); //NON-NLS
+        if (!harbor().isValid(pos)) return;
+        final Battleship shipAtCursor = harbor().findShipAt(pos);
+        if (preview != null) {
+            ownMap().remove(preview);
+            selectedInHarbor.setStatus(NORMAL);
+            harbor().remove(selectedInHarbor);
+            harbor().add(selectedInHarbor);
+            preview = null;
+            selectedInHarbor = null;
+        }
+        else if (shipAtCursor != null) {
+            selectedInHarbor = shipAtCursor;
+            selectedInHarbor.setStatus(VALID_PREVIEW);
+            harbor().remove(selectedInHarbor);
+            harbor().add(selectedInHarbor);
+            preview = new Battleship(selectedInHarbor.getLength(), 0, 0, RIGHT);
+            setPreviewStatus(preview);
+            ownMap().add(preview);
+        }
+    }
+
+    /**
+     * Rotates the preview ship.
+     */
+    @Override
+    public void rotateShip() {
+        ClientGameLogic.LOGGER.log(Level.DEBUG, "pushed rotate"); //NON-NLS
+        if (preview == null) return;
+        preview.rotated();
+        ownMap().remove(preview);
+        ownMap().add(preview);
+    }
+
+    /**
+     * Finds a free position in the harbor to place a ship.
+     *
+     * @return the y coordinate of a free position in the harbor
+     */
+    private int freeY() {
+        for (int i = 0; i < harbor().getHeight(); i++)
+            if (harbor().findShipAt(0, i) == null)
+                return i;
+        throw new RuntimeException("Cannot find a free slot in harbor");
+    }
+
+    /**
+     * Updates the status of the specified ship based on its validity.
+     */
+    private void setPreviewStatus(Battleship ship) {
+        ship.setStatus(ownMap().isValid(ship) ? VALID_PREVIEW : INVALID_PREVIEW);
+    }
+
+    /**
+     * The user has marked the map as finished.
+     */
+    @Override
+    public void mapFinished() {
+        if (!harbor().getItems().isEmpty()) return;
+        logic.send(new MapMessage(ownMap().getRemainingShips()));
+        logic.setInfoText("wait.for.opponent");
+        logic.setState(new WaitState(logic));
+    }
+
+    /**
+     * Checks if the player's map is complete (i.e., all ships are placed).
+     *
+     * @return true if all ships are placed, false otherwise
+     */
+    @Override
+    public boolean isMapComplete() {
+        return harbor().getItems().isEmpty();
+    }
+
+    /**
+     * Checks if there is currently a preview ship.
+     *
+     * @return true if there is currently a preview ship, false otherwise
+     */
+    @Override
+    public boolean movingShip() {
+        return preview != null;
+    }
+
+    /**
+     * Returns the player's own map.
+     *
+     * @return the player's own map
+     */
+    private ShipMap ownMap() {
+        return logic.getOwnMap();
+    }
+
+    /**
+     * Returns the harbor map.
+     *
+     * @return the harbor map
+     */
+    private ShipMap harbor() {
+        return logic.getHarbor();
+    }
+
+    /**
+     * Loads a map from the specified file.
+     *
+     * @param file the file to load the map from
+     * @throws IOException if the map cannot be loaded
+     */
+    @Override
+    public void loadMap(File file) throws IOException {
+        final ShipMapDTO dto = ShipMapDTO.loadFrom(file);
+        if (!dto.fits(logic.getDetails()))
+            throw new IOException(lookup("map.doesnt.fit"));
+        ownMap().clear();
+        dto.getShips().forEach(ownMap()::add);
+        harbor().clear();
+        preview = null;
+        selectedInHarbor = null;
+    }
+
+    /**
+     * Checks if the player's own map may be loaded from a file.
+     *
+     * @return true if the own map may be loaded from file, false otherwise
+     */
+    @Override
+    public boolean mayLoadMap() {
+        return true;
+    }
+
+    /**
+     * Checks if the player's own map may be saved to a file.
+     *
+     * @return true if the own map may be saved to file, false otherwise
+     */
+    @Override
+    public boolean maySaveMap() {
+        return harbor().getItems().isEmpty();
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/GameOverState.java

@@ -0,0 +1,32 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+/**
+ * Represents the state of the client when the game is over.
+ */
+class GameOverState extends ClientState {
+    /**
+     * Constructs a new instance of GameOverState.
+     *
+     * @param logic the client game logic
+     */
+    GameOverState(ClientGameLogic logic) {
+        super(logic);
+    }
+
+    /**
+     * Returns true to indicate that the battle state should be shown.
+     *
+     * @return true if the battle state should be shown
+     */
+    @Override
+    public boolean showBattle() {
+        return true;
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/InitialState.java

@@ -0,0 +1,65 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.Rotation;
+
+import java.util.Map.Entry;
+
+/**
+ * Represents the state of the client waiting for the
+ * {@linkplain pp.battleship.message.server.GameDetails}
+ * from the server.
+ */
+class InitialState extends ClientState {
+    /**
+     * Creates a new initial state.
+     *
+     * @param logic the game logic
+     */
+    public InitialState(ClientGameLogic logic) {
+        super(logic);
+    }
+
+    /**
+     * Sets the game details provided by the server.
+     *
+     * @param details the game details including map size and ships
+     */
+    @Override
+    public void receivedGameDetails(GameDetails details) {
+        logic.initializeMaps(details);
+        fillHarbor(details);
+        logic.setInfoText(details.getInfoTextKey());
+        logic.setState(new EditorState(logic));
+    }
+
+    /**
+     * Fills the harbor with ships as specified by the game details.
+     *
+     * @param details the game details including map size and ships
+     */
+    private void fillHarbor(GameDetails details) {
+        int y = 0;
+        for (Entry<Integer, Integer> entry : details.getShipNums().entrySet()) {
+            final int len = entry.getKey();
+            final int num = entry.getValue();
+            for (int i = 0; i < num; i++) {
+                final Battleship ship = new Battleship(len, 0, y++, Rotation.RIGHT);
+                logic.getHarbor().add(ship);
+            }
+        }
+    }
+
+    @Override
+    public boolean maySaveMap() {
+        return false;
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/ServerConnection.java

@@ -0,0 +1,32 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+/**
+ * Interface representing a connection to the server.
+ * Extends ClientSender to allow sending messages to the server.
+ */
+public interface ServerConnection extends ClientSender {
+
+    /**
+     * Checks if the client is currently connected to the server.
+     *
+     * @return true if connected, false otherwise.
+     */
+    boolean isConnected();
+
+    /**
+     * Establishes a connection to the server.
+     */
+    void connect();
+
+    /**
+     * Disconnects from the server.
+     */
+    void disconnect();
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/client/WaitState.java

@@ -0,0 +1,41 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.client;
+
+import pp.battleship.message.server.StartBattleMessage;
+
+import java.lang.System.Logger.Level;
+
+class WaitState extends ClientState {
+
+    /**
+     * Creates a new instance of {@link WaitState}.
+     *
+     * @param logic the game logic
+     */
+    public WaitState(ClientGameLogic logic) {
+        super(logic);
+    }
+
+    @Override
+    public boolean showEditor() {
+        return true;
+    }
+
+    /**
+     * Starts the battle based on the server message.
+     *
+     * @param msg the message indicating whose turn it is to shoot
+     */
+    @Override
+    public void receivedStartBattle(StartBattleMessage msg) {
+        ClientGameLogic.LOGGER.log(Level.INFO, "start battle, {0} turn", msg.isMyTurn() ? "my" : "other's"); //NON-NLS
+        logic.setInfoText(msg.getInfoTextKey());
+        logic.setState(new BattleState(logic, msg.isMyTurn()));
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/server/Player.java

@@ -0,0 +1,54 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.server;
+
+import pp.battleship.BattleshipConfig;
+import pp.battleship.model.ShipMap;
+
+/**
+ * Class representing a player
+ */
+public class Player {
+    private final ShipMap map;
+    private final String name;
+    private final int id;
+
+    /**
+     * Creates new Player
+     *
+     * @param id     the id of the connection to the client represented by this player
+     * @param name   the human-readable name of this player
+     * @param config model holding the player
+     */
+    Player(int id, String name, BattleshipConfig config) {
+        this.id = id;
+        this.name = name;
+        map = new ShipMap(config.getMapWidth(), config.getMapHeight(), null);
+    }
+
+    /**
+     * Returns the id of the connection to the client represented by this player.
+     *
+     * @return the id
+     */
+    public int getId() {
+        return id;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Player(%s,%s)", name, id); //NON-NLS
+    }
+
+    /**
+     * @return map containing own ships and shots
+     */
+    public ShipMap getMap() {
+        return map;
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerGameLogic.java

@@ -0,0 +1,220 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.server;
+
+import pp.battleship.BattleshipConfig;
+import pp.battleship.message.client.ClientInterpreter;
+import pp.battleship.message.client.MapMessage;
+import pp.battleship.message.client.ShootMessage;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.ServerMessage;
+import pp.battleship.message.server.StartBattleMessage;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.IntPoint;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Controls the server-side game logic for Battleship.
+ * Manages game states, player interactions, and message handling.
+ */
+public class ServerGameLogic implements ClientInterpreter {
+    private static final Logger LOGGER = System.getLogger(ServerGameLogic.class.getName());
+
+    private final BattleshipConfig config;
+    private final List<Player> players = new ArrayList<>(2);
+    private final Set<Player> readyPlayers = new HashSet<>();
+    private final ServerSender serverSender;
+    private Player activePlayer;
+    private ServerState state = ServerState.WAIT;
+
+    /**
+     * Constructs a ServerGameLogic with the specified sender and configuration.
+     *
+     * @param serverSender the sender used to send messages to clients
+     * @param config       the game configuration
+     */
+    public ServerGameLogic(ServerSender serverSender, BattleshipConfig config) {
+        this.serverSender = serverSender;
+        this.config = config;
+    }
+
+    /**
+     * Returns the  state of the game.
+     */
+    ServerState getState() {
+        return state;
+    }
+
+    /**
+     * Sets the new state of the game and logs the state transition.
+     *
+     * @param newState the new state to set
+     */
+    void setState(ServerState newState) {
+        LOGGER.log(Level.DEBUG, "state transition {0} --> {1}", state, newState); //NON-NLS
+        state = newState;
+    }
+
+    /**
+     * Returns the opponent of the specified player.
+     *
+     * @param p the player
+     * @return the opponent of the player
+     */
+    Player getOpponent(Player p) {
+        if (players.size() != 2)
+            throw new RuntimeException("trying to find opponent without having 2 players");
+        final int index = players.indexOf(p);
+        if (index < 0)
+            throw new RuntimeException("Nonexistent player " + p);
+        return players.get(1 - index);
+    }
+
+    /**
+     * Returns the player representing the client with the specified connection ID.
+     *
+     * @param id the ID of the client
+     * @return the player associated with the client ID, or null if not found
+     */
+    public Player getPlayerById(int id) {
+        for (Player player : players)
+            if (player.getId() == id)
+                return player;
+        LOGGER.log(Level.ERROR, "no player found with connection {0}", id); //NON-NLS
+        return null;
+    }
+
+    /**
+     * Sends a message to the specified player.
+     *
+     * @param player the player to send the message to
+     * @param msg    the message to send
+     */
+    void send(Player player, ServerMessage msg) {
+        LOGGER.log(Level.INFO, "sending to {0}: {1}", player, msg); //NON-NLS
+        serverSender.send(player.getId(), msg);
+    }
+
+    /**
+     * Adds a new player to the game if there are less than two players.
+     * Transitions the state to SET_UP if two players are present.
+     *
+     * @param id the connection ID of the new player
+     * @return the player added to the game, or null if the game is not in the right state
+     */
+    public Player addPlayer(int id) {
+        if (state != ServerState.WAIT) {
+            LOGGER.log(Level.ERROR, "addPlayer not allowed in {0}", state); //NON-NLS
+            return null;
+        }
+        final int n = players.size() + 1;
+        final Player player = new Player(id, "player " + n, config); //NON-NLS
+        LOGGER.log(Level.INFO, "adding {0}", player); //NON-NLS
+        players.add(player);
+        if (players.size() == 2) {
+            activePlayer = players.get(0);
+            for (Player p : players)
+                send(p, new GameDetails(config));
+            setState(ServerState.SET_UP);
+        }
+        return player;
+    }
+
+    /**
+     * Handles the reception of a MapMessage.
+     *
+     * @param msg  the received MapMessage
+     * @param from the ID of the sender client
+     */
+    @Override
+    public void received(MapMessage msg, int from) {
+        if (state != ServerState.SET_UP)
+            LOGGER.log(Level.ERROR, "playerReady not allowed in {0}", state); //NON-NLS
+        else
+            playerReady(getPlayerById(from), msg.getShips());
+    }
+
+    /**
+     * Handles the reception of a ShootMessage.
+     *
+     * @param msg  the received ShootMessage
+     * @param from the ID of the sender client
+     */
+    @Override
+    public void received(ShootMessage msg, int from) {
+        if (state != ServerState.BATTLE)
+            LOGGER.log(Level.ERROR, "shoot not allowed in {0}", state); //NON-NLS
+        else
+            shoot(getPlayerById(from), msg.getPosition());
+    }
+
+    /**
+     * Marks the player as ready and sets their ships.
+     * Transitions the state to PLAY if both players are ready.
+     *
+     * @param player the player who is ready
+     * @param ships  the list of ships placed by the player
+     */
+    void playerReady(Player player, List<Battleship> ships) {
+        if (!readyPlayers.add(player)) {
+            LOGGER.log(Level.ERROR, "{0} was already ready", player); //NON-NLS
+            return;
+        }
+        ships.forEach(player.getMap()::add);
+        if (readyPlayers.size() == 2) {
+            for (Player p : players)
+                send(p, new StartBattleMessage(p == activePlayer));
+            setState(ServerState.BATTLE);
+        }
+    }
+
+    /**
+     * Handles the shooting action by the player.
+     *
+     * @param p   the player who shot
+     * @param pos the position of the shot
+     */
+    void shoot(Player p, IntPoint pos) {
+        if (p != activePlayer) return;
+        final Player otherPlayer = getOpponent(activePlayer);
+        final Battleship selectedShip = otherPlayer.getMap().findShipAt(pos);
+        if (selectedShip == null) {
+            // shot missed
+            send(activePlayer, EffectMessage.miss(true, pos));
+            send(otherPlayer, EffectMessage.miss(false, pos));
+            activePlayer = otherPlayer;
+        }
+        else {
+            // shot hit a ship
+            selectedShip.hit(pos);
+            if (otherPlayer.getMap().getRemainingShips().isEmpty()) {
+                // game is over
+                send(activePlayer, EffectMessage.won(pos, selectedShip));
+                send(otherPlayer, EffectMessage.lost(pos, selectedShip, activePlayer.getMap().getRemainingShips()));
+                setState(ServerState.GAME_OVER);
+            }
+            else if (selectedShip.isDestroyed()) {
+                // ship has been destroyed, but game is not yet over
+                send(activePlayer, EffectMessage.shipDestroyed(true, pos, selectedShip));
+                send(otherPlayer, EffectMessage.shipDestroyed(false, pos, selectedShip));
+            }
+            else {
+                // ship has been hit, but it hasn't been destroyed
+                send(activePlayer, EffectMessage.hit(true, pos));
+                send(otherPlayer, EffectMessage.hit(false, pos));
+            }
+        }
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerSender.java

@@ -0,0 +1,23 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.server;
+
+import pp.battleship.message.server.ServerMessage;
+
+/**
+ * Interface for sending messages to a client.
+ */
+public interface ServerSender {
+    /**
+     * Send the specified message to the client.
+     *
+     * @param id      the id of the client that shall receive the message
+     * @param message the message
+     */
+    void send(int id, ServerMessage message);
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerState.java

@@ -0,0 +1,33 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.server;
+
+/**
+ * Represents the different states of the Battleship server during the game lifecycle.
+ */
+enum ServerState {
+    /**
+     * The server is waiting for clients to connect.
+     */
+    WAIT,
+
+    /**
+     * The server is waiting for clients to set up their maps.
+     */
+    SET_UP,
+
+    /**
+     * The battle of the game where players take turns to attack each other's ships.
+     */
+    BATTLE,
+
+    /**
+     * The game has ended because all the ships of one player have been destroyed.
+     */
+    GAME_OVER
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/singlemode/BattleshipClientConfig.java

@@ -0,0 +1,114 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.singlemode;
+
+import pp.battleship.BattleshipConfig;
+import pp.battleship.model.IntPoint;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Class providing access to the Battleship client configuration.
+ * Extends {@link BattleshipConfig} to include additional properties specific to the client.
+ * This class manages configuration settings related to the RobotClient's behavior
+ * and the game maps used in single mode.
+ * <p>
+ * <b>Note:</b> Attributes of this class should not be marked as {@code final}
+ * to ensure proper functionality when reading from a properties file.
+ * </p>
+ */
+public class BattleshipClientConfig extends BattleshipConfig {
+
+    /**
+     * Array representing the predefined shooting locations for the RobotClient.
+     * The array stores coordinates in pairs, where even indices represent x-coordinates
+     * and odd indices represent y-coordinates.
+     */
+    @Property("robot.targets")
+    private int[] robotTargets = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+
+    /**
+     * The delay (in milliseconds) between shots fired by the RobotClient.
+     */
+    @Property("robot.delay")
+    private int delay = 750;
+
+    /**
+     * Path to the file representing the opponent's map.
+     */
+    @Property("map.opponent")
+    private String opponentMap;
+
+    /**
+     * Path to the file representing the player's own map.
+     */
+    @Property("map.own")
+    private String ownMap;
+
+    /**
+     * Creates a default {@code BattleshipClientConfig} with predefined values.
+     */
+    public BattleshipClientConfig() {
+        // Default constructor
+    }
+
+    /**
+     * Returns an iterator of {@link IntPoint} objects representing the predefined
+     * shooting locations for the RobotClient.
+     *
+     * @return an iterator of {@code IntPoint} representing the shooting locations.
+     */
+    public Iterator<IntPoint> getRobotTargets() {
+        List<IntPoint> targets = new ArrayList<>();
+        for (int i = 0; i < robotTargets.length; i += 2) {
+            int x = robotTargets[i];
+            int y = robotTargets[i + 1];
+            targets.add(new IntPoint(x, y));
+        }
+        return targets.iterator();
+    }
+
+    /**
+     * Returns the delay (in milliseconds) between shots by the RobotClient.
+     *
+     * @return the delay in milliseconds.
+     */
+    public int getDelay() {
+        return delay;
+    }
+
+    /**
+     * Returns the file representing the opponent's map.
+     *
+     * @return the opponent's map file, or {@code null} if not set.
+     */
+    public File getOpponentMap() {
+        return opponentMap == null ? null : new File(opponentMap);
+    }
+
+    /**
+     * Returns the file representing the player's own map.
+     *
+     * @return the player's own map file, or {@code null} if not set.
+     */
+    public File getOwnMap() {
+        return ownMap == null ? null : new File(ownMap);
+    }
+
+    /**
+     * Determines if the game is in single mode based on the presence of an opponent map.
+     *
+     * @return {@code true} if the opponent map is set, indicating single mode; {@code false} otherwise.
+     */
+    public boolean isSingleMode() {
+        return opponentMap != null;
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/singlemode/Copycat.java

@@ -0,0 +1,75 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.singlemode;
+
+import pp.battleship.message.client.ClientInterpreter;
+import pp.battleship.message.client.ClientMessage;
+import pp.battleship.message.client.MapMessage;
+import pp.battleship.message.client.ShootMessage;
+import pp.battleship.model.Battleship;
+
+/**
+ * The {@code Copycat} class is a utility that creates a copy of a {@link ClientMessage}.
+ * It implements the {@link ClientInterpreter} interface to interpret and process
+ * different types of messages.
+ */
+class Copycat implements ClientInterpreter {
+    private ClientMessage copiedMessage;
+
+    /**
+     * Creates a copy of the provided {@link ClientMessage}.
+     *
+     * @param msg the message to be copied
+     * @return a copy of the provided message
+     */
+    static ClientMessage copy(ClientMessage msg) {
+        final Copycat copycat = new Copycat();
+        msg.accept(copycat, 0);
+        return copycat.copiedMessage;
+    }
+
+    /**
+     * Private constructor to prevent direct instantiation of {@code Copycat}.
+     */
+    private Copycat() { /* do nothing */ }
+
+    /**
+     * Handles the reception of a {@link ShootMessage}.
+     * Since a {@code ShootMessage} does not need to be copied, it is directly assigned.
+     *
+     * @param msg  the received {@code ShootMessage}
+     * @param from the identifier of the sender
+     */
+    @Override
+    public void received(ShootMessage msg, int from) {
+        // copying is not necessary
+        copiedMessage = msg;
+    }
+
+    /**
+     * Handles the reception of a {@link MapMessage}.
+     * Creates a deep copy of the {@code MapMessage} by copying each {@link Battleship} in the message.
+     *
+     * @param msg  the received {@code MapMessage}
+     * @param from the identifier of the sender
+     */
+    @Override
+    public void received(MapMessage msg, int from) {
+        copiedMessage = new MapMessage(msg.getShips().stream().map(Copycat::copy).toList());
+    }
+
+    /**
+     * Creates a copy of the provided {@link Battleship}.
+     *
+     * @param ship the battleship to be copied
+     * @return a copy of the provided battleship
+     */
+    private static Battleship copy(Battleship ship) {
+        return new Battleship(ship.getLength(), ship.getX(), ship.getY(), ship.getRot());
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/singlemode/InterpreterProxy.java

@@ -0,0 +1,93 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.singlemode;
+
+import pp.battleship.game.client.BattleshipClient;
+import pp.battleship.game.client.ClientGameLogic;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.ServerInterpreter;
+import pp.battleship.message.server.ServerMessage;
+import pp.battleship.message.server.StartBattleMessage;
+
+import java.io.IOException;
+
+/**
+ * A proxy class that interprets messages from the server and forwards them to the BattleshipClient.
+ * Implements the ServerInterpreter interface to handle specific server messages.
+ */
+class InterpreterProxy implements ServerInterpreter {
+    private final BattleshipClient playerClient;
+
+    /**
+     * Constructs an InterpreterProxy with the specified BattleshipClient.
+     *
+     * @param playerClient the client to which the server messages are forwarded
+     */
+    InterpreterProxy(BattleshipClient playerClient) {
+        this.playerClient = playerClient;
+    }
+
+    /**
+     * Handles the received GameDetails message by accepting it with the client's game logic.
+     * If the client's own map option is set, it also loads the map.
+     *
+     * @param msg the GameDetails message received from the server
+     */
+    @Override
+    public void received(GameDetails msg) {
+        msg.accept(playerClient.getGameLogic());
+        if (playerClient.getConfig().getOwnMap() != null)
+            playerClient.enqueue(this::loadMap);
+    }
+
+    /**
+     * Loads the map specified in the client's options and notifies the game logic that the map is finished.
+     *
+     * @throws RuntimeException if the map fails to load.
+     */
+    private void loadMap() {
+        final ClientGameLogic clientGameLogic = playerClient.getGameLogic();
+        try {
+            clientGameLogic.loadMap(playerClient.getConfig().getOwnMap());
+        }
+        catch (IOException e) {
+            throw new RuntimeException("Failed to load PlayerClient map", e);
+        }
+        clientGameLogic.mapFinished();
+    }
+
+    /**
+     * Forwards the received StartBattleMessage to the client's game logic.
+     *
+     * @param msg the StartBattleMessage received from the server
+     */
+    @Override
+    public void received(StartBattleMessage msg) {
+        forward(msg);
+    }
+
+    /**
+     * Forwards the received EffectMessage to the client's game logic.
+     *
+     * @param msg the EffectMessage received from the server
+     */
+    @Override
+    public void received(EffectMessage msg) {
+        forward(msg);
+    }
+
+    /**
+     * Forwards the specified ServerMessage to the client's game logic by enqueuing the message acceptance.
+     *
+     * @param msg the ServerMessage to forward
+     */
+    private void forward(ServerMessage msg) {
+        playerClient.enqueue(() -> msg.accept(playerClient.getGameLogic()));
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/singlemode/RobotClient.java

@@ -0,0 +1,127 @@
+package pp.battleship.game.singlemode;
+
+import pp.battleship.game.client.BattleshipClient;
+import pp.battleship.message.client.MapMessage;
+import pp.battleship.message.client.ShootMessage;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.ServerInterpreter;
+import pp.battleship.message.server.StartBattleMessage;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.dto.ShipMapDTO;
+import pp.util.RandomPositionIterator;
+
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import static pp.battleship.Resources.lookup;
+
+/**
+ * RobotClient simulates a client in the Battleship game.
+ * It handles its own shooting targets and acts as a sender of client messages.
+ * The RobotClient can shoot at predefined targets or generate random targets if predefined ones are exhausted.
+ */
+class RobotClient implements ServerInterpreter {
+    private static final Logger LOGGER = System.getLogger(RobotClient.class.getName());
+    private final BattleshipClient app;
+    private final ServerConnectionMockup connection;
+    private final BattleshipClientConfig config;
+    private final ShipMapDTO dto;
+    private final Iterator<IntPoint> targetIterator;
+    private final Iterator<IntPoint> randomPositionIterator;
+    private final Set<IntPoint> shotTargets = new HashSet<>();
+    private final Timer timer = new Timer(true);
+
+    /**
+     * Constructs a RobotClient instance with the given connection and configuration.
+     * Initializes the shooting targets from the configuration.
+     *
+     * @param app        The BattleshipApp instance, used to enqueue actions on the main thread
+     * @param connection The ServerConnectionMockup instance
+     * @param config     The BattleshipClientConfig instance
+     * @param dto        The ShipMap dto specified at app start
+     */
+    RobotClient(BattleshipClient app, ServerConnectionMockup connection, BattleshipClientConfig config, ShipMapDTO dto) {
+        this.app = app;
+        this.connection = connection;
+        this.config = config;
+        this.dto = dto;
+        this.targetIterator = config.getRobotTargets();
+        this.randomPositionIterator = new RandomPositionIterator<>(IntPoint::new, config.getMapWidth(), config.getMapHeight());
+    }
+
+    /**
+     * Schedules the RobotClient to take a shot after the specified delay.
+     */
+    private void shoot() {
+        timer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                app.enqueue(RobotClient.this::robotShot);
+            }
+        }, config.getDelay());
+    }
+
+    /**
+     * Makes the RobotClient take a shot by sending a ShootMessage with the target position.
+     */
+    private void robotShot() {
+        connection.sendRobotMessage(new ShootMessage(getShotPosition()));
+    }
+
+    /**
+     * Determines the next shot position. If predefined targets are available, uses the next target.
+     * Otherwise, generates a random target that has not been shot at before.
+     *
+     * @return the next shot position as IntPosition
+     */
+    private IntPoint getShotPosition() {
+        while (true) {
+            final IntPoint target = targetIterator.hasNext() ? targetIterator.next() : randomPositionIterator.next();
+            if (shotTargets.add(target)) return target;
+        }
+    }
+
+    /**
+     * Receives GameDetails, creates and sends the ShipMap to the mock server.
+     *
+     * @param details The game details
+     */
+    @Override
+    public void received(GameDetails details) {
+        if (!dto.fits(details))
+            throw new RuntimeException(lookup("map.doesnt.fit"));
+        app.enqueue(() -> connection.sendRobotMessage(new MapMessage(dto.getShips())));
+    }
+
+    /**
+     * Receives the StartBattleMessage and updates the turn status.
+     * If it is RobotClient's turn to shoot, schedules a shot using shoot();
+     *
+     * @param msg The start battle message
+     */
+    @Override
+    public void received(StartBattleMessage msg) {
+        LOGGER.log(Level.INFO, "Received StartBattleMessage: {0}", msg); //NON-NLS
+        if (msg.isMyTurn())
+            shoot();
+    }
+
+    /**
+     * Receives an effect message, logs it, and updates the turn status.
+     * If it is RobotClient's turn to shoot, schedules a shot using shoot();
+     *
+     * @param msg The effect message
+     */
+    @Override
+    public void received(EffectMessage msg) {
+        LOGGER.log(Level.INFO, "Received EffectMessage: {0}", msg); //NON-NLS
+        if (msg.isMyTurn())
+            shoot();
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/game/singlemode/ServerConnectionMockup.java

@@ -0,0 +1,145 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.game.singlemode;
+
+import pp.battleship.game.client.BattleshipClient;
+import pp.battleship.game.client.ServerConnection;
+import pp.battleship.game.server.ServerGameLogic;
+import pp.battleship.game.server.ServerSender;
+import pp.battleship.message.client.ClientMessage;
+import pp.battleship.message.server.ServerInterpreter;
+import pp.battleship.message.server.ServerMessage;
+import pp.battleship.model.dto.ShipMapDTO;
+
+import java.io.IOException;
+
+import static pp.battleship.game.singlemode.Copycat.copy;
+
+/**
+ * A mock implementation of the ServerConnection interface for single mode.
+ * Simulates a server connection without actual network communication.
+ * Handles a mock player named RobotClient and schedules its shots when due.
+ */
+public class ServerConnectionMockup implements ServerConnection, ServerSender {
+    /**
+     * The id of the player client.
+     */
+    private static final int PLAYER_CLIENT = 1;
+    /**
+     * The id of the robot client.
+     */
+    private static final int ROBOT_CLIENT = 2;
+
+    private final BattleshipClient playerClient;
+    private final RobotClient robotClient;
+    private final InterpreterProxy playerProxy;
+    private final ServerGameLogic serverGameLogic;
+
+    /**
+     * Constructs a ServerConnectionMockup instance for the given Battleship application.
+     * Creates a RobotClient instance and an instance of ServerGameLogic.
+     *
+     * @param playerClient The Battleship client instance, e.g., a BattleshipApp instance.
+     */
+    public ServerConnectionMockup(BattleshipClient playerClient) {
+        this.playerClient = playerClient;
+        robotClient = new RobotClient(playerClient, this, playerClient.getConfig(), getShipMapDTO());
+        serverGameLogic = new ServerGameLogic(this, playerClient.getConfig());
+        playerProxy = new InterpreterProxy(playerClient);
+    }
+
+    /**
+     * Always returns true as this is a mock connection.
+     *
+     * @return true, indicating the mock connection is always considered connected.
+     */
+    @Override
+    public boolean isConnected() {
+        return true;
+    }
+
+    /**
+     * Simulates connecting to a server by adding the PlayerClient and the RobotClient to the serverGameLogic.
+     * Loads the map of the PlayerClient and triggers sending it to the serverGameLogic.
+     */
+    @Override
+    public void connect() {
+        serverGameLogic.addPlayer(PLAYER_CLIENT);
+        serverGameLogic.addPlayer(ROBOT_CLIENT);
+    }
+
+    /**
+     * Does nothing upon shutdown of the app.
+     */
+    @Override
+    public void disconnect() {
+        //do nothing
+    }
+
+    /**
+     * Forwards the specified message received from the player client to the server logic.
+     *
+     * @param message The message from the player client to be processed.
+     */
+    @Override
+    public void send(ClientMessage message) { // from PlayerClient, as this is the PlayerClients 'serverConnection'
+        copy(message).accept(serverGameLogic, PLAYER_CLIENT);
+    }
+
+    /**
+     * Forwards the specified message received from the robot client to the server logic.
+     *
+     * @param message The message from the robot client to be processed.
+     */
+    void sendRobotMessage(ClientMessage message) {
+        message.accept(serverGameLogic, ROBOT_CLIENT);
+    }
+
+    /**
+     * Forwards the specified message received from the server logic either to the player client or to the
+     * robot client, depending on the specified id.
+     *
+     * @param id      The recipient id
+     * @param message The server message to be processed
+     * @see #PLAYER_CLIENT
+     * @see #ROBOT_CLIENT
+     */
+    @Override
+    public void send(int id, ServerMessage message) {
+        message.accept(getInterpreter(id));
+    }
+
+    /**
+     * Retrieves the ServerInterpreter of the client with the specified id.
+     *
+     * @param clientId the id of the client whose ServerInterpreter shall be retrieved.
+     * @return the ServerInterpreter of the client
+     * @throws java.lang.IllegalArgumentException if there is no client with the specified id.
+     */
+    private ServerInterpreter getInterpreter(int clientId) {
+        return switch (clientId) {
+            case PLAYER_CLIENT -> playerProxy;
+            case ROBOT_CLIENT -> robotClient;
+            default -> throw new IllegalArgumentException("Unexpected value: " + clientId);
+        };
+    }
+
+    /**
+     * Loads the ShipMapDTO from the opponent map file.
+     *
+     * @return the loaded ShipMapDTO.
+     */
+    private ShipMapDTO getShipMapDTO() {
+        try {
+            return ShipMapDTO.loadFrom(playerClient.getConfig().getOpponentMap());
+        }
+        catch (IOException e) {
+            throw new RuntimeException("Failed to load RobotClient map", e);
+        }
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/client/ClientInterpreter.java

@@ -0,0 +1,29 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.client;
+
+/**
+ * Visitor interface for processing all client messages.
+ */
+public interface ClientInterpreter {
+    /**
+     * Processes a received ShootMessage.
+     *
+     * @param msg  the ShootMessage to be processed
+     * @param from the connection ID from which the message was received
+     */
+    void received(ShootMessage msg, int from);
+
+    /**
+     * Processes a received MapMessage.
+     *
+     * @param msg  the MapMessage to be processed
+     * @param from the connection ID from which the message was received
+     */
+    void received(MapMessage msg, int from);
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/client/ClientMessage.java

@@ -0,0 +1,32 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.client;
+
+import com.jme3.network.AbstractMessage;
+
+/**
+ * An abstract base class for client messages used in network transfer.
+ * It extends the AbstractMessage class provided by the jme3-network library.
+ */
+public abstract class ClientMessage extends AbstractMessage {
+
+    /**
+     * Constructs a new ClientMessage instance.
+     */
+    protected ClientMessage() {
+        super(true);
+    }
+
+    /**
+     * Accepts a visitor for processing this message.
+     *
+     * @param interpreter the visitor to be used for processing
+     * @param from        the connection ID of the sender
+     */
+    public abstract void accept(ClientInterpreter interpreter, int from);
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/client/MapMessage.java

@@ -0,0 +1,66 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.client;
+
+import com.jme3.network.serializing.Serializable;
+import pp.battleship.model.Battleship;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A message sent by the client containing the positions of the ships on the player's map.
+ */
+@Serializable
+public class MapMessage extends ClientMessage {
+    private List<Battleship> ships;
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private MapMessage() { /* empty */ }
+
+    /**
+     * Constructs a MapMessage with the specified list of ships.
+     *
+     * @param ships the list of ships placed on the player's map
+     */
+    public MapMessage(List<Battleship> ships) {
+        this.ships = new ArrayList<>(ships);
+    }
+
+    /**
+     * Returns the list of ships on the player's map.
+     *
+     * @return the list of ships
+     */
+    public List<Battleship> getShips() {
+        return ships;
+    }
+
+    /**
+     * Returns a string representation of the MapMessage.
+     *
+     * @return a string representation of the MapMessage
+     */
+    @Override
+    public String toString() {
+        return "MapMessage{ships=" + ships + '}'; //NON-NLS
+    }
+
+    /**
+     * Accepts a visitor to process this message.
+     *
+     * @param interpreter the visitor to process this message
+     * @param from        the connection ID from which the message was received
+     */
+    @Override
+    public void accept(ClientInterpreter interpreter, int from) {
+        interpreter.received(this, from);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/client/ShootMessage.java

@@ -0,0 +1,63 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.client;
+
+import com.jme3.network.serializing.Serializable;
+import pp.battleship.model.IntPoint;
+
+/**
+ * A message sent by the client to indicate a shooting action in the game.
+ */
+@Serializable
+public class ShootMessage extends ClientMessage {
+    private IntPoint position;
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private ShootMessage() { /* empty */ }
+
+    /**
+     * Constructs a ShootMessage with the specified position.
+     *
+     * @param position the position where the shot is fired
+     */
+    public ShootMessage(IntPoint position) {
+        this.position = position;
+    }
+
+    /**
+     * Returns the position of the shot.
+     *
+     * @return the position of the shot
+     */
+    public IntPoint getPosition() {
+        return position;
+    }
+
+    /**
+     * Returns a string representation of the ShootMessage.
+     *
+     * @return a string representation of the ShootMessage
+     */
+    @Override
+    public String toString() {
+        return "ShootMessage{position=" + position + '}'; //NON-NLS
+    }
+
+    /**
+     * Accepts a visitor to process this message.
+     *
+     * @param interpreter the visitor to process this message
+     * @param from        the connection ID from which the message was received
+     */
+    @Override
+    public void accept(ClientInterpreter interpreter, int from) {
+        interpreter.received(this, from);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/server/EffectMessage.java

@@ -0,0 +1,211 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.server;
+
+import com.jme3.network.serializing.Serializable;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.Shot;
+
+import java.util.Collections;
+import java.util.List;
+
+import static pp.util.Util.copy;
+
+/**
+ * A message sent by the server to inform clients about the effects of a shot in the Battleship game.
+ */
+@Serializable
+public class EffectMessage extends ServerMessage {
+    private boolean ownShot;
+    private Shot shot;
+    private Battleship destroyedShip;
+    private List<Battleship> remainingOpponentShips;
+
+    /**
+     * Creates an EffectMessage indicating a hit.
+     *
+     * @param ownShot true if the shot was fired by the player, false if by the opponent
+     * @param pos     the position of the shot
+     * @return an EffectMessage indicating a hit
+     */
+    public static EffectMessage hit(boolean ownShot, IntPoint pos) {
+        return new EffectMessage(ownShot, new Shot(pos, true), null, null);
+    }
+
+    /**
+     * Creates an EffectMessage indicating a miss.
+     *
+     * @param ownShot true if the shot was fired by the player, false if by the opponent
+     * @param pos     the position of the shot
+     * @return an EffectMessage indicating a miss
+     */
+    public static EffectMessage miss(boolean ownShot, IntPoint pos) {
+        return new EffectMessage(ownShot, new Shot(pos, false), null, null);
+    }
+
+    /**
+     * Creates an EffectMessage indicating a ship was destroyed.
+     *
+     * @param ownShot       true if the shot was fired by the player, false if by the opponent
+     * @param pos           the position of the shot
+     * @param destroyedShip the ship that was destroyed
+     * @return an EffectMessage indicating a ship was destroyed
+     */
+    public static EffectMessage shipDestroyed(boolean ownShot, IntPoint pos, Battleship destroyedShip) {
+        return new EffectMessage(ownShot, new Shot(pos, true), destroyedShip, null);
+    }
+
+    /**
+     * Creates an EffectMessage indicating the player has won the game.
+     *
+     * @param pos           the position of the shot
+     * @param destroyedShip the ship that was destroyed
+     * @return an EffectMessage indicating the player has won
+     */
+    public static EffectMessage won(IntPoint pos, Battleship destroyedShip) {
+        return new EffectMessage(true, new Shot(pos, true), destroyedShip, Collections.emptyList());
+    }
+
+    /**
+     * Creates an EffectMessage indicating the player has lost the game.
+     *
+     * @param pos                    the position of the shot
+     * @param destroyedShip          the ship that was destroyed
+     * @param remainingOpponentShips the list of opponent's remaining ships
+     * @return an EffectMessage indicating the player has lost
+     */
+    public static EffectMessage lost(IntPoint pos, Battleship destroyedShip, List<Battleship> remainingOpponentShips) {
+        return new EffectMessage(false, new Shot(pos, true), destroyedShip, remainingOpponentShips);
+    }
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private EffectMessage() { /* empty */ }
+
+    /**
+     * Constructs an EffectMessage with the specified parameters.
+     *
+     * @param ownShot                true if the shot was fired by the player, false if by the opponent
+     * @param shot                   the shot fired
+     * @param destroyedShip          the ship that was destroyed by the shot, null if no ship was destroyed
+     * @param remainingOpponentShips the list of opponent's remaining ships after the shot
+     */
+    private EffectMessage(boolean ownShot, Shot shot, Battleship destroyedShip, List<Battleship> remainingOpponentShips) {
+        this.ownShot = ownShot;
+        this.shot = shot;
+        this.destroyedShip = destroyedShip;
+        this.remainingOpponentShips = copy(remainingOpponentShips);
+    }
+
+    /**
+     * Accepts a visitor to process this message.
+     *
+     * @param interpreter the visitor to process this message
+     */
+    @Override
+    public void accept(ServerInterpreter interpreter) {
+        interpreter.received(this);
+    }
+
+    /**
+     * Checks if the shot was fired by the player.
+     *
+     * @return true if the shot was fired by the player, false otherwise
+     */
+    public boolean isOwnShot() {
+        return ownShot;
+    }
+
+    /**
+     * Returns the shot fired.
+     *
+     * @return the shot fired
+     */
+    public Shot getShot() {
+        return shot;
+    }
+
+    /**
+     * Returns the ship that was destroyed by the shot.
+     *
+     * @return the destroyed ship, null if no ship was destroyed
+     */
+    public Battleship getDestroyedShip() {
+        return destroyedShip;
+    }
+
+    /**
+     * Returns the list of opponent's remaining ships after the shot.
+     *
+     * @return the list of opponent's remaining ships, null if the game is not yet over
+     */
+    public List<Battleship> getRemainingOpponentShips() {
+        return remainingOpponentShips;
+    }
+
+    /**
+     * Checks if the game is over.
+     *
+     * @return true if the game is over, false otherwise
+     */
+    public boolean isGameOver() {
+        return remainingOpponentShips != null;
+    }
+
+    /**
+     * Checks if the game is won by the player.
+     *
+     * @return true if the game is won by the player, false otherwise
+     */
+    public boolean isGameWon() {
+        return isGameOver() && isOwnShot();
+    }
+
+    /**
+     * Checks if the game is lost by the player.
+     *
+     * @return true if the game is lost by the player, false otherwise
+     */
+    public boolean isGameLost() {
+        return isGameOver() && !isOwnShot();
+    }
+
+    /**
+     * Checks if it's currently the player's turn.
+     *
+     * @return true if it's the player's turn, false otherwise
+     */
+    public boolean isMyTurn() {
+        return isOwnShot() == shot.isHit();
+    }
+
+    /**
+     * Returns a string representation of the EffectMessage.
+     *
+     * @return a string representation of the EffectMessage
+     */
+    @Override
+    public String toString() {
+        return "EffectMessage{ownShot=" + ownShot + ", shot=" + shot + ", destroyedShip=" + destroyedShip + //NON-NLS
+               ", remainingOpponentShips=" + remainingOpponentShips + '}'; //NON-NLS
+    }
+
+    /**
+     * Returns the key for the informational text associated with this message.
+     *
+     * @return the key for the informational text
+     */
+    @Override
+    public String getInfoTextKey() {
+        if (isGameOver())
+            return isGameWon() ? "you.won.the.game" : "you.lost.the.game";
+        return isMyTurn() ? "its.your.turn" : "wait.for.opponent";
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/server/GameDetails.java

@@ -0,0 +1,97 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.server;
+
+import com.jme3.network.serializing.Serializable;
+import pp.battleship.BattleshipConfig;
+
+import java.util.Map;
+
+/**
+ * A message sent by the server to provide details about the game configuration.
+ */
+@Serializable
+public class GameDetails extends ServerMessage {
+    private Map<Integer, Integer> shipNums;
+    private int width;
+    private int height;
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private GameDetails() { /* empty */ }
+
+    /**
+     * Constructs a GameDetails message with the specified BattleshipConfig.
+     *
+     * @param config the BattleshipConfig containing game configuration details
+     */
+    public GameDetails(BattleshipConfig config) {
+        this.shipNums = config.getShipNums();
+        this.width = config.getMapWidth();
+        this.height = config.getMapHeight();
+    }
+
+    /**
+     * Accepts a visitor to process this message.
+     *
+     * @param interpreter the visitor to process this message
+     */
+    @Override
+    public void accept(ServerInterpreter interpreter) {
+        interpreter.received(this);
+    }
+
+    /**
+     * Returns a map where the keys represent ship lengths
+     * and the values represent the number of ships of that length.
+     *
+     * @return a map of ship lengths to the number of ships
+     */
+    public Map<Integer, Integer> getShipNums() {
+        return shipNums;
+    }
+
+    /**
+     * Returns the width of the game map.
+     *
+     * @return the width of the game map
+     */
+    public int getWidth() {
+        return width;
+    }
+
+    /**
+     * Returns the height of the game map.
+     *
+     * @return the height of the game map
+     */
+    public int getHeight() {
+        return height;
+    }
+
+    /**
+     * Returns a string representation of the GameDetails message.
+     *
+     * @return a string representation of the GameDetails message
+     */
+    @Override
+    public String toString() {
+        return "GameDetails{" + "ships=" + getShipNums() + ", width=" + width + ", height=" + height + '}'; //NON-NLS
+    }
+
+    /**
+     * Returns the key for the informational text associated with this message.
+     *
+     * @return the key for the informational text
+     */
+    @Override
+    public String getInfoTextKey() {
+        return "place.ships.in.your.map";
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/server/ServerInterpreter.java

@@ -0,0 +1,36 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.server;
+
+/**
+ * An interface for processing server messages.
+ * Implementations of this interface can be used to handle different types of server messages.
+ */
+public interface ServerInterpreter {
+
+    /**
+     * Handles a GameDetails message received from the server.
+     *
+     * @param msg the GameDetails message received
+     */
+    void received(GameDetails msg);
+
+    /**
+     * Handles a StartBattleMessage received from the server.
+     *
+     * @param msg the StartBattleMessage received
+     */
+    void received(StartBattleMessage msg);
+
+    /**
+     * Handles an EffectMessage received from the server.
+     *
+     * @param msg the EffectMessage received
+     */
+    void received(EffectMessage msg);
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/server/ServerMessage.java

@@ -0,0 +1,39 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.server;
+
+import com.jme3.network.AbstractMessage;
+
+/**
+ * An abstract base class for server messages used in network transfer.
+ * It extends the AbstractMessage class provided by the jme3-network library.
+ */
+public abstract class ServerMessage extends AbstractMessage {
+
+    /**
+     * Constructs a new ServerMessage instance.
+     */
+    protected ServerMessage() {
+        super(true);
+    }
+
+    /**
+     * Accepts a visitor for processing this message.
+     *
+     * @param interpreter the visitor to be used for processing
+     */
+    public abstract void accept(ServerInterpreter interpreter);
+
+    /**
+     * Gets the bundle key of the informational text to be shown at the client.
+     * This key is used to retrieve the appropriate localized text for display.
+     *
+     * @return the bundle key of the informational text
+     */
+    public abstract String getInfoTextKey();
+}

Projekte/battleship/model/src/main/java/pp/battleship/message/server/StartBattleMessage.java

@@ -0,0 +1,71 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.message.server;
+
+import com.jme3.network.serializing.Serializable;
+
+/**
+ * A message sent by the server to inform clients about the start of the battle.
+ */
+@Serializable
+public class StartBattleMessage extends ServerMessage {
+    private boolean myTurn;
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private StartBattleMessage() { /* empty */ }
+
+    /**
+     * Constructs a StartBattleMessage with the specified turn indicator.
+     *
+     * @param myTurn true if it's the client's turn to shoot, false otherwise
+     */
+    public StartBattleMessage(boolean myTurn) {
+        this.myTurn = myTurn;
+    }
+
+    /**
+     * Accepts a visitor to process this message.
+     *
+     * @param interpreter the visitor to process this message
+     */
+    @Override
+    public void accept(ServerInterpreter interpreter) {
+        interpreter.received(this);
+    }
+
+    /**
+     * Checks if it's the client's turn to shoot.
+     *
+     * @return true if it's the client's turn, false otherwise
+     */
+    public boolean isMyTurn() {
+        return myTurn;
+    }
+
+    /**
+     * Returns a string representation of the StartBattleMessage.
+     *
+     * @return a string representation of the StartBattleMessage
+     */
+    @Override
+    public String toString() {
+        return "StartBattleMessage{myTurn=" + myTurn + '}'; //NON-NLS
+    }
+
+    /**
+     * Returns the key for the informational text associated with this message.
+     *
+     * @return the key for the informational text
+     */
+    @Override
+    public String getInfoTextKey() {
+        return isMyTurn() ? "its.your.turn" : "wait.for.opponent";
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/Battleship.java

@@ -0,0 +1,324 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+import com.jme3.network.serializing.Serializable;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import static java.lang.Math.max;
+import static java.lang.Math.min;
+
+/**
+ * Represents a battleship in the game. A battleship is characterized by its length, position,
+ * rotation, and status. It can be moved, rotated, and hit during the game. This class also
+ * provides methods to check for collisions with other ships and to determine whether the
+ * battleship has been destroyed.
+ */
+@Serializable
+public class Battleship implements Item {
+    /**
+     * Enumeration representing the different statuses a battleship can have during the game.
+     */
+    public enum Status {
+        /**
+         * The ship is in its normal state, not being previewed for placement.
+         */
+        NORMAL,
+
+        /**
+         * The ship is being previewed in a valid position for placement.
+         */
+        VALID_PREVIEW,
+
+        /**
+         * The ship is being previewed in an invalid position for placement.
+         */
+        INVALID_PREVIEW
+    }
+
+    private final int length; // The length of the battleship
+    private int x;            // The x-coordinate of the battleship's position
+    private int y;            // The y-coordinate of the battleship's position
+    private Rotation rot;     // The rotation of the battleship
+    private Status status;    // The current status of the battleship
+    private final Set<IntPoint> damaged = new HashSet<>(); // The set of positions that have been hit on this ship
+
+    /**
+     * Default constructor for serialization. Initializes a battleship with length 0,
+     * at position (0, 0), with a default rotation of RIGHT.
+     */
+    private Battleship() {
+        this(0, 0, 0, Rotation.RIGHT);
+    }
+
+    /**
+     * Constructs a new Battleship with the specified length, position, and rotation.
+     *
+     * @param length the length of the battleship
+     * @param x      the x-coordinate of the battleship's initial position
+     * @param y      the y-coordinate of the battleship's initial position
+     * @param rot    the rotation of the battleship
+     */
+    public Battleship(int length, int x, int y, Rotation rot) {
+        this.x = x;
+        this.y = y;
+        this.rot = rot;
+        this.length = length;
+        this.status = Status.NORMAL;
+    }
+
+    /**
+     * Returns the current x-coordinate of the battleship's position.
+     *
+     * @return the x-coordinate of the battleship
+     */
+    public int getX() {
+        return x;
+    }
+
+    /**
+     * Returns the current y-coordinate of the battleship's position.
+     *
+     * @return the y-coordinate of the battleship
+     */
+    public int getY() {
+        return y;
+    }
+
+    /**
+     * Moves the battleship to the specified coordinates.
+     *
+     * @param x the new x-coordinate of the battleship's position
+     * @param y the new y-coordinate of the battleship's position
+     */
+    public void moveTo(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    /**
+     * Moves the battleship to the specified position.
+     *
+     * @param pos the new position of the battleship
+     */
+    public void moveTo(IntPosition pos) {
+        moveTo(pos.getX(), pos.getY());
+    }
+
+    /**
+     * Returns the current status of the battleship.
+     *
+     * @return the status of the battleship
+     */
+    public Status getStatus() {
+        return status;
+    }
+
+    /**
+     * Sets the status of the battleship.
+     *
+     * @param status the new status to be set for the battleship
+     */
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+
+    /**
+     * Returns the length of the battleship.
+     *
+     * @return the length of the battleship
+     */
+    public int getLength() {
+        return length;
+    }
+
+    /**
+     * Returns the minimum x-coordinate that the battleship occupies based on its current position and rotation.
+     *
+     * @return the minimum x-coordinate of the battleship
+     */
+    public int getMinX() {
+        return x + min(0, (length - 1) * rot.dx());
+    }
+
+    /**
+     * Returns the maximum x-coordinate that the battleship occupies based on its current position and rotation.
+     *
+     * @return the maximum x-coordinate of the battleship
+     */
+    public int getMaxX() {
+        return x + max(0, (length - 1) * rot.dx());
+    }
+
+    /**
+     * Returns the minimum y-coordinate that the battleship occupies based on its current position and rotation.
+     *
+     * @return the minimum y-coordinate of the battleship
+     */
+    public int getMinY() {
+        return y + min(0, (length - 1) * rot.dy());
+    }
+
+    /**
+     * Returns the maximum y-coordinate that the battleship occupies based on its current position and rotation.
+     *
+     * @return the maximum y-coordinate of the battleship
+     */
+    public int getMaxY() {
+        return y + max(0, (length - 1) * rot.dy());
+    }
+
+    /**
+     * Returns the current rotation of the battleship.
+     *
+     * @return the rotation of the battleship
+     */
+    public Rotation getRot() {
+        return rot;
+    }
+
+    /**
+     * Sets the rotation of the battleship.
+     *
+     * @param rot the new rotation to be set for the battleship
+     */
+    public void setRotation(Rotation rot) {
+        this.rot = rot;
+    }
+
+    /**
+     * Rotates the battleship by 90 degrees clockwise.
+     */
+    public void rotated() {
+        setRotation(rot.rotate());
+    }
+
+    /**
+     * Attempts to hit the battleship at the specified position.
+     * If the position is part of the battleship, the hit is recorded.
+     *
+     * @param x the x-coordinate of the position to hit
+     * @param y the y-coordinate of the position to hit
+     * @return true if the position is part of the battleship, false otherwise
+     * @see #contains(int, int)
+     */
+    public boolean hit(int x, int y) {
+        if (!contains(x, y))
+            return false;
+        damaged.add(new IntPoint(x, y));
+        return true;
+    }
+
+    /**
+     * Attempts to hit the battleship at the specified position.
+     * If the position is part of the battleship, the hit is recorded.
+     * This is a convenience method for {@linkplain #hit(int, int)}.
+     *
+     * @param position the position to hit
+     * @return true if the position is part of the battleship, false otherwise
+     */
+    public boolean hit(IntPosition position) {
+        return hit(position.getX(), position.getY());
+    }
+
+    /**
+     * Returns the positions of this battleship that have been hit.
+     *
+     * @return a set of positions that have been hit
+     * @see #hit(int, int)
+     */
+    public Set<IntPoint> getDamaged() {
+        return Collections.unmodifiableSet(damaged);
+    }
+
+    /**
+     * Checks whether the specified position is covered by the battleship. This method does
+     * not record a hit, only checks coverage.
+     * This is a convenience method for {@linkplain #contains(int, int)}.
+     *
+     * @param pos the position to check
+     * @return true if the position is covered by the battleship, false otherwise
+     */
+    public boolean contains(IntPosition pos) {
+        return contains(pos.getX(), pos.getY());
+    }
+
+    /**
+     * Checks whether the specified position is covered by the battleship. This method does
+     * not record a hit, only checks coverage.
+     *
+     * @param x the x-coordinate of the position to check
+     * @param y the y-coordinate of the position to check
+     * @return true if the position is covered by the battleship, false otherwise
+     */
+    public boolean contains(int x, int y) {
+        return getMinX() <= x && x <= getMaxX() &&
+               getMinY() <= y && y <= getMaxY();
+    }
+
+    /**
+     * Determines if the battleship has been completely destroyed. A battleship is considered
+     * destroyed if all of its positions have been hit.
+     *
+     * @return true if the battleship is destroyed, false otherwise
+     * @see #hit(int, int)
+     */
+    public boolean isDestroyed() {
+        return damaged.size() == length;
+    }
+
+    /**
+     * Checks whether this battleship collides with another battleship. Two battleships collide
+     * if any of their occupied positions overlap.
+     *
+     * @param other the other battleship to check collision with
+     * @return true if the battleships collide, false otherwise
+     */
+    public boolean collidesWith(Battleship other) {
+        return other.getMaxX() >= getMinX() && getMaxX() >= other.getMinX() &&
+               other.getMaxY() >= getMinY() && getMaxY() >= other.getMinY();
+    }
+
+    /**
+     * Returns a string representation of the battleship, including its length, position,
+     * and rotation.
+     *
+     * @return a string representation of the battleship
+     */
+    @Override
+    public String toString() {
+        return "Ship{length=" + length + ", x=" + x + ", y=" + y + ", rot=" + rot + '}';  //NON-NLS
+    }
+
+    /**
+     * Accepts a visitor that returns a value of type {@code T}. This method is part of the
+     * Visitor design pattern.
+     *
+     * @param visitor the visitor to accept
+     * @param <T>     the type of the value returned by the visitor
+     * @return the value returned by the visitor
+     */
+    @Override
+    public <T> T accept(Visitor<T> visitor) {
+        return visitor.visit(this);
+    }
+
+    /**
+     * Accepts a visitor that does not return a value. This method is part of the
+     * Visitor design pattern.
+     *
+     * @param visitor the visitor to accept
+     */
+    @Override
+    public void accept(VoidVisitor visitor) {
+        visitor.visit(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/IntPoint.java

@@ -0,0 +1,94 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+import com.jme3.network.serializing.Serializable;
+
+import java.util.Objects;
+
+/**
+ * Represents a point in the two-dimensional plane with integer coordinates.
+ */
+@Serializable
+public final class IntPoint implements IntPosition {
+    private int x;
+    private int y;
+
+    /**
+     * Default constructor for serialization purposes.
+     */
+    private IntPoint() { /* do nothing */ }
+
+    /**
+     * Constructs a new IntPoint with the specified coordinates.
+     *
+     * @param x the x-coordinate of the point
+     * @param y the y-coordinate of the point
+     */
+    public IntPoint(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    /**
+     * Gets the x-coordinate of the point.
+     *
+     * @return the x-coordinate
+     */
+    @Override
+    public int getX() {
+        return x;
+    }
+
+    /**
+     * Gets the y-coordinate of the point.
+     *
+     * @return the y-coordinate
+     */
+    @Override
+    public int getY() {
+        return y;
+    }
+
+    /**
+     * Indicates whether some other object is "equal to" this one.
+     *
+     * @param obj the reference object with which to compare
+     * @return true if this object is the same as the obj argument; false otherwise
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) return true;
+        if (obj == null || obj.getClass() != this.getClass()) return false;
+        var that = (IntPoint) obj;
+        return this.x == that.x &&
+               this.y == that.y;
+    }
+
+    /**
+     * Returns a hash code value for the IntPoint.
+     *
+     * @return a hash code value for this object
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(x, y);
+    }
+
+    /**
+     * Returns a string representation of the IntPoint.
+     *
+     * @return a string representation of the object
+     */
+    @Override
+    public String toString() {
+        return "IntPoint[" + //NON-NLS
+               "x=" + x + ", " + //NON-NLS
+               "y=" + y + ']'; //NON-NLS
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/IntPosition.java

@@ -0,0 +1,28 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+/**
+ * Interface representing a position with X and Y coordinates.
+ */
+public interface IntPosition {
+
+    /**
+     * Returns the X coordinate of this position.
+     *
+     * @return the X coordinate.
+     */
+    int getX();
+
+    /**
+     * Returns the Y coordinate of this position.
+     *
+     * @return the Y coordinate.
+     */
+    int getY();
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/Item.java

@@ -0,0 +1,31 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+/**
+ * An interface representing any item on a ship map.
+ * It extends the IntPosition interface to provide position information.
+ */
+public interface Item {
+
+    /**
+     * Accepts a visitor to perform operations on the item.
+     *
+     * @param visitor the visitor performing operations on the item
+     * @param <T>     the type of result returned by the visitor
+     * @return the result of the visitor's operation on the item
+     */
+    <T> T accept(Visitor<T> visitor);
+
+    /**
+     * Accepts a visitor to perform operations on the item without returning a result.
+     *
+     * @param visitor the visitor performing operations on the item
+     */
+    void accept(VoidVisitor visitor);
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/Rotation.java

@@ -0,0 +1,67 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+import java.io.Serializable;
+
+/**
+ * Represents the rotation of a ship and provides functionality related to rotation.
+ */
+public enum Rotation implements Serializable {
+    /**
+     * Represents the ship facing upwards.
+     */
+    UP,
+    /**
+     * Represents the ship facing rightwards.
+     */
+    RIGHT,
+    /**
+     * Represents the ship facing downwards.
+     */
+    DOWN,
+    /**
+     * Represents the ship facing leftwards.
+     */
+    LEFT;
+
+    /**
+     * Gets the change in x-coordinate corresponding to this rotation.
+     *
+     * @return the change in x-coordinate
+     */
+    public int dx() {
+        return switch (this) {
+            case UP, DOWN -> 0;
+            case RIGHT -> 1;
+            case LEFT -> -1;
+        };
+    }
+
+    /**
+     * Gets the change in y-coordinate corresponding to this rotation.
+     *
+     * @return the change in y-coordinate
+     */
+    public int dy() {
+        return switch (this) {
+            case UP -> 1;
+            case LEFT, RIGHT -> 0;
+            case DOWN -> -1;
+        };
+    }
+
+    /**
+     * Rotates the orientation clockwise and returns the next rotation.
+     *
+     * @return the next rotation after rotating clockwise
+     */
+    public Rotation rotate() {
+        return values()[(ordinal() + 1) % values().length];
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/ShipMap.java

@@ -0,0 +1,251 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+import pp.battleship.notification.GameEvent;
+import pp.battleship.notification.GameEventBroker;
+import pp.battleship.notification.ItemAddedEvent;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Stream;
+
+/**
+ * Represents a rectangular map that holds ships and registers shots fired.
+ * It also supports event notification for game state changes such as item addition or removal.
+ * Valid positions on this map have x-coordinates in the range of 0 to width-1 and y-coordinates
+ * in the range of 0 to height-1.
+ *
+ * @see #getWidth()
+ * @see #getHeight()
+ */
+public class ShipMap {
+    /**
+     * A list of items (ships, shots, etc.) placed on the map.
+     */
+    private final List<Item> items = new ArrayList<>();
+
+    /**
+     * The broker responsible for notifying registered listeners of events
+     * (such as when an item is added or removed from the map).
+     * Can be null, in which case no notifications will be sent.
+     */
+    private final GameEventBroker eventBroker;
+
+    private final int width;
+    private final int height;
+
+    /**
+     * Constructs an empty map with the given dimensions. The specified event broker
+     * will handle the notification of changes in the map state, such as adding or removing items.
+     * Passing null as the event broker is allowed, but in that case, no notifications will occur.
+     *
+     * @param width       the number of columns (width) of the map
+     * @param height      the number of rows (height) of the map
+     * @param eventBroker the event broker used for notifying listeners, or null if event distribution is not needed
+     */
+    public ShipMap(int width, int height, GameEventBroker eventBroker) {
+        if (width < 1 || height < 1)
+            throw new IllegalArgumentException("Invalid map size");
+        this.width = width;
+        this.height = height;
+        this.eventBroker = eventBroker;
+    }
+
+    /**
+     * Adds an item (e.g., a ship or a shot) to the map and triggers the appropriate event.
+     *
+     * @param item the item to be added to the map
+     */
+    private void addItem(Item item) {
+        items.add(item);
+        notifyListeners(new ItemAddedEvent(item, this));
+    }
+
+    /**
+     * Adds a battleship to the map and triggers an item addition event.
+     *
+     * @param ship the battleship to be added to the map
+     */
+    public void add(Battleship ship) {
+        addItem(ship);
+    }
+
+    /**
+     * Registers a shot on the map, updates the state of the affected ship (if any),
+     * and triggers an item addition event.
+     *
+     * @param shot the shot to be registered on the map
+     */
+    public void add(Shot shot) {
+        final Battleship ship = findShipAt(shot);
+        if (ship != null)
+            ship.hit(shot);
+        addItem(shot);
+    }
+
+    /**
+     * Removes an item from the map and triggers an item removal event.
+     *
+     * @param item the item to be removed from the map
+     */
+    public void remove(Item item) {
+        items.remove(item);
+        notifyListeners(new ItemAddedEvent(item, this));
+    }
+
+    /**
+     * Removes all items from the map and triggers corresponding removal events for each.
+     */
+    public void clear() {
+        new ArrayList<>(items).forEach(this::remove);
+    }
+
+    /**
+     * Returns a stream of items of a specified type (class).
+     *
+     * @param clazz the class type to filter items by
+     * @param <T>   the type of items to return
+     * @return a stream of items matching the specified class type
+     */
+    private <T extends Item> Stream<T> getItems(Class<T> clazz) {
+        return items.stream().filter(clazz::isInstance).map(clazz::cast);
+    }
+
+    /**
+     * Returns a stream of all battleships currently on the map.
+     *
+     * @return a stream of battleships
+     */
+    public Stream<Battleship> getShips() {
+        return getItems(Battleship.class);
+    }
+
+    /**
+     * Returns a list of all remaining battleships that have not been destroyed.
+     *
+     * @return a list of remaining battleships
+     */
+    public List<Battleship> getRemainingShips() {
+        return getShips().filter(s -> !s.isDestroyed()).toList();
+    }
+
+    /**
+     * Returns a stream of all shots fired on the map.
+     *
+     * @return a stream of shots
+     */
+    public Stream<Shot> getShots() {
+        return getItems(Shot.class);
+    }
+
+    /**
+     * Returns an unmodifiable list of all items currently on the map.
+     *
+     * @return an unmodifiable list of all items
+     */
+    public List<Item> getItems() {
+        return Collections.unmodifiableList(items);
+    }
+
+    /**
+     * Returns the width (number of columns) of the map.
+     *
+     * @return the width of the map
+     */
+    public int getWidth() {
+        return width;
+    }
+
+    /**
+     * Returns the height (number of rows) of the map.
+     *
+     * @return the height of the map
+     */
+    public int getHeight() {
+        return height;
+    }
+
+    /**
+     * Checks if the given ship is in a valid position (within the map bounds and non-colliding with other ships).
+     *
+     * @param ship the battleship to validate
+     * @return true if the ship's position is valid, false otherwise
+     */
+    public boolean isValid(Battleship ship) {
+        return isValid(ship.getMinX(), ship.getMinY()) &&
+               isValid(ship.getMaxX(), ship.getMaxY()) &&
+               getShips().filter(s -> s != ship).noneMatch(ship::collidesWith);
+    }
+
+    /**
+     * Finds a battleship at the specified coordinates.
+     *
+     * @param x the x-coordinate of the position
+     * @param y the y-coordinate of the position
+     * @return the ship at the specified coordinates, or null if none is found
+     */
+    public Battleship findShipAt(int x, int y) {
+        return getShips().filter(ship -> ship.contains(x, y))
+                         .findAny()
+                         .orElse(null);
+    }
+
+    /**
+     * Finds a battleship at the specified position. This is a convenience method.
+     *
+     * @param position the position within the map
+     * @return the ship at the specified position, or null if none is found
+     */
+    public Battleship findShipAt(IntPosition position) {
+        return findShipAt(position.getX(), position.getY());
+    }
+
+    /**
+     * Validates whether the specified position is within the map boundaries.
+     *
+     * @param pos the position to validate
+     * @return true if the position is within the map, false otherwise
+     */
+    public boolean isValid(IntPosition pos) {
+        return isValid(pos.getX(), pos.getY());
+    }
+
+    /**
+     * Checks if the specified coordinates are within the map boundaries.
+     *
+     * @param x the x-coordinate to validate
+     * @param y the y-coordinate to validate
+     * @return true if the coordinates are valid, false otherwise
+     */
+    public boolean isValid(int x, int y) {
+        return x >= 0 && x < width &&
+               y >= 0 && y < height;
+    }
+
+    /**
+     * Returns a string representation of the ship map.
+     *
+     * @return a string representation of the ship map
+     */
+    @Override
+    public String toString() {
+        return "ShipMap{" + items + '}'; //NON-NLS
+    }
+
+    /**
+     * Notifies all registered listeners about a game event if the event broker is available.
+     *
+     * @param event the event to be distributed to listeners
+     */
+    private void notifyListeners(GameEvent event) {
+        if (eventBroker != null)
+            eventBroker.notifyListeners(event);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/Shot.java

@@ -0,0 +1,140 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+import com.jme3.network.serializing.Serializable;
+
+import java.util.Objects;
+
+/**
+ * Represents a shot in the Battleship game.
+ * A shot is defined by its coordinates and whether it was a hit or miss.
+ */
+@Serializable
+public final class Shot implements Item, IntPosition {
+    private int x;
+    private int y;
+    private boolean hit;
+
+    // Private no-arg constructor for serialization purposes
+    private Shot() {}
+
+    /**
+     * Creates a new shot.
+     *
+     * @param x   the x-coordinate of the shot
+     * @param y   the y-coordinate of the shot
+     * @param hit indicates whether the shot was a hit
+     */
+    public Shot(int x, int y, boolean hit) {
+        this.x = x;
+        this.y = y;
+        this.hit = hit;
+    }
+
+    /**
+     * Creates a new shot.
+     *
+     * @param pos the position of the shot
+     * @param hit indicates whether the shot was a hit
+     */
+    public Shot(IntPosition pos, boolean hit) {
+        this(pos.getX(), pos.getY(), hit);
+    }
+
+    /**
+     * Gets the x-coordinate of the shot.
+     *
+     * @return the x-coordinate of the shot
+     */
+    @Override
+    public int getX() {
+        return x;
+    }
+
+    /**
+     * Gets the y-coordinate of the shot.
+     *
+     * @return the y-coordinate of the shot
+     */
+    @Override
+    public int getY() {
+        return y;
+    }
+
+    /**
+     * Checks if the shot was a hit.
+     *
+     * @return true if the shot was a hit, false otherwise
+     */
+    public boolean isHit() {
+        return hit;
+    }
+
+    /**
+     * Checks if this shot is equal to another object.
+     * Two shots are considered equal if they have the same coordinates and hit status.
+     *
+     * @param obj the object to compare with
+     * @return true if the objects are equal, false otherwise
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) return true;
+        if (obj == null || obj.getClass() != this.getClass()) return false;
+        var that = (Shot) obj;
+        return this.x == that.x &&
+               this.y == that.y &&
+               this.hit == that.hit;
+    }
+
+    /**
+     * Computes the hash code of this shot.
+     *
+     * @return the hash code of this shot
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(x, y, hit);
+    }
+
+    /**
+     * Returns a string representation of the shot.
+     *
+     * @return a string representation of the shot
+     */
+    @Override
+    public String toString() {
+        return "Shot[" + //NON-NLS
+               "x=" + x + ", " + //NON-NLS
+               "y=" + y + ", " + //NON-NLS
+               "hit=" + hit + ']'; //NON-NLS
+    }
+
+    /**
+     * Accepts a visitor with a return value.
+     *
+     * @param visitor the visitor to accept
+     * @param <T>     the type of the return value
+     * @return the result of the visitor's visit method
+     */
+    @Override
+    public <T> T accept(Visitor<T> visitor) {
+        return visitor.visit(this);
+    }
+
+    /**
+     * Accepts a visitor without a return value.
+     *
+     * @param visitor the visitor to accept
+     */
+    @Override
+    public void accept(VoidVisitor visitor) {
+        visitor.visit(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/Visitor.java

@@ -0,0 +1,31 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+/**
+ * An interface for implementing the Visitor pattern for different types of elements in the Battleship model.
+ *
+ * @param <T> the type of result returned by the visit methods
+ */
+public interface Visitor<T> {
+    /**
+     * Visits a Shot element.
+     *
+     * @param shot the Shot element to visit
+     * @return the result of visiting the Shot element
+     */
+    T visit(Shot shot);
+
+    /**
+     * Visits a Battleship element.
+     *
+     * @param ship the Battleship element to visit
+     * @return the result of visiting the Battleship element
+     */
+    T visit(Battleship ship);
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/VoidVisitor.java

@@ -0,0 +1,28 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model;
+
+/**
+ * An interface for implementing the Visitor pattern for different types of elements in the Battleship model
+ * without returning any result.
+ */
+public interface VoidVisitor {
+    /**
+     * Visits a Shot element.
+     *
+     * @param shot the Shot element to visit
+     */
+    void visit(Shot shot);
+
+    /**
+     * Visits a Battleship element.
+     *
+     * @param ship the Battleship element to visit
+     */
+    void visit(Battleship ship);
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/dto/BattleshipDTO.java

@@ -0,0 +1,51 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model.dto;
+
+import pp.battleship.model.Battleship;
+import pp.battleship.model.Rotation;
+
+/**
+ * A class representing data transfer objects of battleships for JSON serialization and deserialization.
+ */
+class BattleshipDTO {
+    private final int length;   // The length of the battleship
+    private final int x;        // The x-coordinate of the battleship's position
+    private final int y;        // The y-coordinate of the battleship's position
+    private final Rotation rot; // The rotation of the battleship
+
+    /**
+     * Constructs a BattleshipDTO object from a Battleship object.
+     *
+     * @param ship the Battleship object to be converted
+     */
+    BattleshipDTO(Battleship ship) {
+        length = ship.getLength();
+        x = ship.getX();
+        y = ship.getY();
+        rot = ship.getRot();
+    }
+
+    /**
+     * Gets the length of the battleship.
+     *
+     * @return the length
+     */
+    public int getLength() {
+        return length;
+    }
+
+    /**
+     * Converts this BattleshipDTO object to a Battleship object.
+     *
+     * @return the Battleship object
+     */
+    Battleship toBattleship() {
+        return new Battleship(length, x, y, rot);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/model/dto/ShipMapDTO.java

@@ -0,0 +1,117 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.model.dto;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.ShipMap;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.List;
+
+/**
+ * A class representing data transfer objects of ship maps for JSON serialization and deserialization.
+ */
+public class ShipMapDTO {
+    // Logger instance for logging messages
+    static final Logger LOGGER = System.getLogger(ShipMapDTO.class.getName());
+
+    // Width of the ship map
+    private int width;
+
+    // Height of the ship map
+    private int height;
+
+    // List of ships in the map
+    private List<BattleshipDTO> ships;
+
+    /**
+     * Constructs a ShipMapDTO object from a ShipMap object.
+     *
+     * @param map the ShipMap object to be converted
+     */
+    public ShipMapDTO(ShipMap map) {
+        this.width = map.getWidth();
+        this.height = map.getHeight();
+        this.ships = map.getShips().map(BattleshipDTO::new).toList();
+    }
+
+    /**
+     * Checks if the current ship map fits the game details provided.
+     *
+     * @param details the game details to be matched against
+     * @return true if the ship map fits the game details, false otherwise
+     */
+    public boolean fits(GameDetails details) {
+        if (width != details.getWidth() || height != details.getHeight())
+            return false;
+        int numShips = details.getShipNums().values().stream().mapToInt(Integer::intValue).sum();
+        if (numShips != ships.size())
+            return false;
+        for (var e : details.getShipNums().entrySet()) {
+            final int shipLength = e.getKey();
+            final int requiredNum = e.getValue();
+            final int actualNum = (int) ships.stream()
+                                             .filter(s -> s.getLength() == shipLength)
+                                             .count();
+            if (requiredNum != actualNum)
+                return false;
+        }
+        return true;
+    }
+
+    /**
+     * Returns the ships stored in this DTO.
+     *
+     * @return the ships stored in this DTO
+     */
+    public List<Battleship> getShips() {
+        return ships.stream().map(BattleshipDTO::toBattleship).toList();
+    }
+
+    /**
+     * Saves the current ShipMapDTO to a file in JSON format.
+     *
+     * @param file the file to which the ShipMapDTO will be saved
+     * @throws IOException if an I/O error occurs
+     */
+    public void saveTo(File file) throws IOException {
+        try (FileWriter writer = new FileWriter(file)) {
+            final Gson gson = new GsonBuilder().setPrettyPrinting().create();
+            final String json = gson.toJson(this);
+            LOGGER.log(Level.DEBUG, "JSON of map: {0}", json); //NON-NLS
+            writer.write(json);
+            LOGGER.log(Level.INFO, "JSON written to {0}", file.getAbsolutePath()); //NON-NLS
+        }
+    }
+
+    /**
+     * Loads a ShipMapDTO from a file containing JSON data.
+     *
+     * @param file the file from which the ShipMapDTO will be loaded
+     * @return the loaded ShipMapDTO object
+     * @throws IOException if an I/O error occurs or if the JSON is invalid
+     */
+    public static ShipMapDTO loadFrom(File file) throws IOException {
+        try (FileReader reader = new FileReader(file)) {
+            final Gson gson = new Gson();
+            return gson.fromJson(reader, ShipMapDTO.class);
+        }
+        catch (JsonParseException e) {
+            throw new IOException(e.getLocalizedMessage());
+        }
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/ClientStateEvent.java

@@ -0,0 +1,23 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Event when an item is added to a map.
+ */
+public record ClientStateEvent() implements GameEvent {
+    /**
+     * Notifies the game event listener of this event.
+     *
+     * @param listener the game event listener
+     */
+    @Override
+    public void notifyListener(GameEventListener listener) {
+        listener.receivedEvent(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/GameEvent.java

@@ -0,0 +1,20 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * An interface used for all game events.
+ */
+public interface GameEvent {
+    /**
+     * Notifies the game event listener of the event.
+     *
+     * @param listener the game event listener to be notified
+     */
+    void notifyListener(GameEventListener listener);
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/GameEventBroker.java

@@ -0,0 +1,20 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Defines a broker for distributing game events to registered listeners.
+ */
+public interface GameEventBroker {
+    /**
+     * Notifies all registered listeners about the specified game event.
+     *
+     * @param event the game event to be broadcast to listeners
+     */
+    void notifyListeners(GameEvent event);
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/GameEventListener.java

@@ -0,0 +1,48 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Listener interface for all events implemented by subclasses of {@linkplain pp.battleship.notification.GameEvent}.
+ */
+public interface GameEventListener {
+    /**
+     * Indicates that an item has been destroyed
+     *
+     * @param event the received event
+     */
+    default void receivedEvent(ItemRemovedEvent event) { /* do nothing */ }
+
+    /**
+     * Indicates that an item has been added to a map.
+     *
+     * @param event the received event
+     */
+    default void receivedEvent(ItemAddedEvent event) { /* do nothing */ }
+
+    /**
+     * Indicates that an info text shall be shown.
+     *
+     * @param event the received event
+     */
+    default void receivedEvent(InfoTextEvent event) { /* do nothing */ }
+
+    /**
+     * Indicates that a sound shall be played.
+     *
+     * @param event the received event
+     */
+    default void receivedEvent(SoundEvent event) { /* do nothing */ }
+
+    /**
+     * Indicates that the client's state has changed.
+     *
+     * @param event the received event
+     */
+    default void receivedEvent(ClientStateEvent event) { /* do nothing */ }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/InfoTextEvent.java

@@ -0,0 +1,25 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Event when an item is added to a map.
+ *
+ * @param key the bundle key for the message
+ */
+public record InfoTextEvent(String key) implements GameEvent {
+    /**
+     * Notifies the game event listener of this event.
+     *
+     * @param listener the game event listener
+     */
+    @Override
+    public void notifyListener(GameEventListener listener) {
+        listener.receivedEvent(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/ItemAddedEvent.java

@@ -0,0 +1,29 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+import pp.battleship.model.Item;
+import pp.battleship.model.ShipMap;
+
+/**
+ * Event when an item is added to a map.
+ *
+ * @param item the added item
+ * @param map  the map that got the additional item
+ */
+public record ItemAddedEvent(Item item, ShipMap map) implements GameEvent {
+    /**
+     * Notifies the game event listener of this event.
+     *
+     * @param listener the game event listener
+     */
+    @Override
+    public void notifyListener(GameEventListener listener) {
+        listener.receivedEvent(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/ItemRemovedEvent.java

@@ -0,0 +1,28 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+import pp.battleship.model.Item;
+import pp.battleship.model.ShipMap;
+
+/**
+ * Event when an item gets removed.
+ *
+ * @param item the destroyed item
+ */
+public record ItemRemovedEvent(Item item, ShipMap map) implements GameEvent {
+    /**
+     * Notifies the game event listener of this event.
+     *
+     * @param listener the game event listener
+     */
+    @Override
+    public void notifyListener(GameEventListener listener) {
+        listener.receivedEvent(this);
+    }
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/Sound.java

@@ -0,0 +1,26 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Enumeration representing different types of sounds used in the game.
+ */
+public enum Sound {
+    /**
+     * Sound of an explosion.
+     */
+    EXPLOSION,
+    /**
+     * Sound of a splash.
+     */
+    SPLASH,
+    /**
+     * Sound of a ship being destroyed.
+     */
+    DESTROYED_SHIP
+}

Projekte/battleship/model/src/main/java/pp/battleship/notification/SoundEvent.java

@@ -0,0 +1,26 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.notification;
+
+/**
+ * Event when an item is added to a map.
+ *
+ * @param sound the sound to be played
+ */
+public record SoundEvent(Sound sound) implements GameEvent {
+
+    /**
+     * Notifies the game event listener of this event.
+     *
+     * @param listener the game event listener
+     */
+    @Override
+    public void notifyListener(GameEventListener listener) {
+        listener.receivedEvent(this);
+    }
+}