semesterprojekt: implement full text adventure (phases 1-7)

Walking skeleton through Swing GUI: YAML-driven world (4 rooms,
4 items, 1 NPC), HashMap command dispatch with parser, three-tier
item hierarchy (readable / switchable / plain), and end-to-end
NPC give/receive flow. 67 tests green.

Semesterprojekt/src/main/java/thb/jeanluc/adventure/App.java

@@ -0,0 +1,86 @@
+package thb.jeanluc.adventure;
+
+import lombok.extern.slf4j.Slf4j;
+import thb.jeanluc.adventure.command.CommandParser;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.impl.DropCommand;
+import thb.jeanluc.adventure.command.impl.ExamineCommand;
+import thb.jeanluc.adventure.command.impl.GiveCommand;
+import thb.jeanluc.adventure.command.impl.GoCommand;
+import thb.jeanluc.adventure.command.impl.HelpCommand;
+import thb.jeanluc.adventure.command.impl.InventoryCommand;
+import thb.jeanluc.adventure.command.impl.LookCommand;
+import thb.jeanluc.adventure.command.impl.QuitCommand;
+import thb.jeanluc.adventure.command.impl.ReadCommand;
+import thb.jeanluc.adventure.command.impl.TakeCommand;
+import thb.jeanluc.adventure.command.impl.TalkCommand;
+import thb.jeanluc.adventure.command.impl.UseCommand;
+import thb.jeanluc.adventure.game.Game;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.ConsoleIO;
+import thb.jeanluc.adventure.io.GameIO;
+import thb.jeanluc.adventure.loader.WorldLoader;
+
+/**
+ * Entry point for the console version of the game. Loads the world from
+ * YAML, wires up the command registry, and hands control to the
+ * {@link Game} loop.
+ */
+@Slf4j
+public final class App {
+
+    private App() {
+    }
+
+    /**
+     * Standard JVM entry point.
+     *
+     * @param args ignored
+     */
+    public static void main(String[] args) {
+        GameIO io = new ConsoleIO();
+        try {
+            run(io);
+        } catch (RuntimeException e) {
+            log.error("Fatal error during game startup", e);
+            io.write("Fatal error: " + e.getMessage());
+            System.exit(1);
+        }
+    }
+
+    /**
+     * Boots the game on the given IO channel. Reusable by both
+     * {@link App} (console) and {@code AppGui} (Swing worker thread).
+     *
+     * @param io the IO channel to use
+     */
+    public static void run(GameIO io) {
+        WorldLoader.LoadResult loaded = new WorldLoader().load();
+        GameContext ctx = new GameContext(loaded.world(), loaded.player(), io);
+
+        CommandRegistry registry = new CommandRegistry();
+        registry.register(new GoCommand(), "go", "move", "walk");
+        registry.register(new LookCommand(), "look", "l");
+        registry.register(new InventoryCommand(), "inventory", "inv", "i");
+        registry.register(new TakeCommand(), "take", "pick", "get");
+        registry.register(new DropCommand(), "drop", "put");
+        registry.register(new UseCommand(), "use");
+        registry.register(new ReadCommand(), "read");
+        registry.register(new ExamineCommand(), "examine", "x", "inspect");
+        registry.register(new TalkCommand(), "talk", "speak");
+        registry.register(new GiveCommand(), "give");
+        registry.register(new HelpCommand(registry), "help", "?");
+
+        QuitCommand quit = new QuitCommand();
+        registry.register(quit, "quit", "exit");
+
+        Game game = new Game(ctx, registry, new CommandParser());
+        quit.bind(game);
+
+        io.write(loaded.world().getTitle());
+        io.write(loaded.world().getWelcomeMessage());
+        new LookCommand().execute(ctx, java.util.List.of());
+
+        game.run();
+    }
+}