feat: implemented WorldFactory

api/src/main/java/ru/dragonestia/msb3/api/world/World.java

@@ -0,0 +1,31 @@
+package ru.dragonestia.msb3.api.world;
+
+import lombok.Getter;
+import lombok.extern.log4j.Log4j2;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.instance.EntityTracker;
+import net.minestom.server.instance.InstanceContainer;
+
+@Log4j2
+@Getter
+public class World {
+
+    private final InstanceContainer instance;
+
+    World(InstanceContainer instance) {
+        this.instance = instance;
+    }
+
+    public synchronized void unload() {
+        if (!instance.isRegistered()) return;
+
+        log.info("Unloading world {} ({})", instance.getUniqueId(), instance.getChunkLoader().getClass().getSimpleName());
+
+        for (var player: instance.getPlayers()) {
+            if (player.isOnline()) player.kick("World forced to unload");
+            else instance.getEntityTracker().unregister(player, EntityTracker.Target.ENTITIES, null);
+        }
+
+        MinecraftServer.getInstanceManager().unregisterInstance(instance);
+    }
+}

api/src/main/java/ru/dragonestia/msb3/api/world/WorldFactory.java

@@ -0,0 +1,30 @@
+package ru.dragonestia.msb3.api.world;
+
+import lombok.extern.log4j.Log4j2;
+import net.minestom.server.instance.InstanceContainer;
+import ru.dragonestia.msb3.api.world.factory.AnvilWorldFactory;
+
+import java.io.File;
+import java.util.concurrent.CompletableFuture;
+
+@Log4j2
+public abstract class WorldFactory {
+
+    public final CompletableFuture<World> createWorld() {
+        return CompletableFuture.supplyAsync(this::loadWorld)
+                .thenApply(world -> {
+                    log.info("Created world {} ({})", world.getInstance().getUniqueId(), world.getInstance().getChunkLoader().getClass().getSimpleName());
+                    return world;
+                });
+    }
+
+    protected final World createWorld(InstanceContainer instance) {
+        return new World(instance);
+    }
+
+    protected abstract World loadWorld();
+
+    public static WorldFactory anvil(File worldDir) {
+        return new AnvilWorldFactory(worldDir);
+    }
+}

api/src/main/java/ru/dragonestia/msb3/api/world/factory/AnvilWorldFactory.java

@@ -0,0 +1,23 @@
+package ru.dragonestia.msb3.api.world.factory;
+
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.instance.anvil.AnvilLoader;
+import ru.dragonestia.msb3.api.world.World;
+import ru.dragonestia.msb3.api.world.WorldFactory;
+
+import java.io.File;
+
+public final class AnvilWorldFactory extends WorldFactory {
+
+    private final File file;
+
+    public AnvilWorldFactory(File file) {
+        this.file = file;
+    }
+
+    @Override
+    protected World loadWorld() {
+        var instance = MinecraftServer.getInstanceManager().createInstanceContainer(new AnvilLoader(file.toPath()));
+        return createWorld(instance);
+    }
+}