[Chore] Replace enum with registry system for feature flags (#28)

* [Chore] Replace enum with registry system for feature flags

* Remove wildcard import

* Create CNAME

* Bump snapshot version (#31)

* [Bugfix] Fix failing tests

* Update build.gradle.kts

* [Chore] Replace enum with code generator for fluids (#27)

* Move Fluids to CodeGenerator

* [Chore] Replace enum with registry

* Refactor: Move 'Fluids' interface from FluidImpl implements to Fluid extends

---------

Co-authored-by: OneLiteFeather <seelenretterin@onelitefeather.net>

* [Chore] Replace enum with registry system for feature flags

* Remove wildcard import

---------

Co-authored-by: theEvilReaper <steffenwx@gmail.com>
Co-authored-by: OneLiteFeather <seelenretterin@onelitefeather.net>

Author: 3 people

code-generators/src/main/java/net/minestom/codegen/feature/FeatureFlagGenerator.java

@@ -0,0 +1,15 @@
+package net.minestom.server.featureflag;
+
+/**
+ * Code autogenerated, do not edit!
+ */
+@SuppressWarnings("unused")
+interface FeatureFlags {
+    FeatureFlag UPDATE_1_21 = FeatureFlagImpl.get("minecraft:update_1_21");
+
+    FeatureFlag BUNDLE = FeatureFlagImpl.get("minecraft:bundle");
+
+    FeatureFlag VANILLA = FeatureFlagImpl.get("minecraft:vanilla");
+
+    FeatureFlag TRADE_REBALANCE = FeatureFlagImpl.get("minecraft:trade_rebalance");
+}

src/autogenerated/java/net/minestom/server/feature/FeatureFlags.java

@@ -0,0 +1,39 @@
+package net.minestom.server.featureflag;
+
+import net.minestom.server.registry.Registry;
+import net.minestom.server.registry.StaticProtocolObject;
+import net.minestom.server.utils.NamespaceID;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+public sealed interface FeatureFlag extends StaticProtocolObject permits FeatureFlagImpl {
+
+    /**
+     * Returns the entity registry.
+     *
+     * @return the entity registry or null if it was created with a builder
+     */
+    @Contract(pure = true)
+    @Nullable
+    Registry.FeatureFlagEntry registry();
+
+    @Override
+    @NotNull
+    NamespaceID namespace();
+
+    static @NotNull Collection<@NotNull FeatureFlag> values() {
+        return FeatureFlagImpl.values();
+    }
+
+    static @Nullable FeatureFlag fromNamespaceId(@NotNull String namespaceID) {
+        return FeatureFlagImpl.getSafe(namespaceID);
+    }
+
+    static @Nullable FeatureFlag fromNamespaceId(@NotNull NamespaceID namespaceID) {
+        return fromNamespaceId(namespaceID.asString());
+    }
+
+}

src/autogenerated/java/net/minestom/server/featureflag/FeatureFlags.java

@@ -0,0 +1,33 @@
+package net.minestom.server.featureflag;
+
+import net.minestom.server.registry.Registry;
+import net.minestom.server.utils.NamespaceID;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public record FeatureFlagImpl(Registry.FeatureFlagEntry registry, NamespaceID namespace, int id) implements FeatureFlag {
+    private static final Registry.DynamicContainer<FeatureFlag> CONTAINER = Registry.createDynamicContainer(Registry.Resource.FEATURE_FLAGS, FeatureFlagImpl::createImpl);
+    private static final AtomicInteger INDEX = new AtomicInteger();
+
+    private static FeatureFlagImpl createImpl(String namespace, Registry.Properties properties) {
+        return new FeatureFlagImpl(Registry.featureFlag(namespace, properties));
+    }
+
+    private FeatureFlagImpl(Registry.FeatureFlagEntry registry) {
+        this(registry, registry.namespace(), INDEX.getAndIncrement());
+    }
+
+    static Collection<FeatureFlag> values() {
+        return CONTAINER.values();
+    }
+
+    public static FeatureFlag get(@NotNull String namespace) {
+        return CONTAINER.get(namespace);
+    }
+
+    static FeatureFlag getSafe(@NotNull String namespace) {
+        return CONTAINER.getSafe(namespace);
+    }
+}

src/main/java/net/minestom/server/featureflag/FeatureFlag.java

@@ -1,25 +1,25 @@
 package net.minestom.server.network.packet.server.configuration;
 
+import net.minestom.server.featureflag.FeatureFlag;
 import net.minestom.server.network.NetworkBuffer;
 import net.minestom.server.network.packet.server.ServerPacket;
 import net.minestom.server.network.packet.server.ServerPacketIdentifier;
-import net.minestom.server.utils.NamespaceID;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Set;
 
 import static net.minestom.server.network.NetworkBuffer.STRING;
 
-public record UpdateEnabledFeaturesPacket(@NotNull Set<NamespaceID> features) implements ServerPacket.Configuration {
-    public static final int MAX_FEATURES = 1024;
+public record UpdateEnabledFeaturesPacket(@NotNull Set<FeatureFlag> features) implements ServerPacket.Configuration {
+    public static final int MAX_FEATURES = 64;
 
     public UpdateEnabledFeaturesPacket(@NotNull NetworkBuffer buffer) {
-        this(Set.copyOf(buffer.readCollection((b) -> NamespaceID.from(b.read(STRING)), MAX_FEATURES)));
+        this(Set.copyOf(buffer.readCollection((b) -> FeatureFlag.fromNamespaceId(b.read(STRING)), MAX_FEATURES)));
     }
 
     @Override
     public void write(@NotNull NetworkBuffer writer) {
-        writer.writeCollection(features, (b, feature) -> b.write(STRING, feature.asString()));
+        writer.writeCollection(features, (b, feature) -> b.write(STRING, feature.namespace().toString()));
     }
 
     @Override