feature(#13558): add copper golem state api

Author: yannicklamprecht

paper-api/src/main/java/org/bukkit/entity/CopperGolem.java

@@ -25,6 +25,20 @@ public interface CopperGolem extends Golem, Shearable {
      */
     void setWeatheringState(WeatheringCopperState state);
 
+    /**
+     * Get the current copper golem state of the copper golem.
+     *
+     * @return the copper golem state
+     */
+    CopperGolem.State getState();
+
+    /**
+     * Set the copper golem state of the copper golem.
+     *
+     * @param state the new copper golem state
+     */
+    void setState(CopperGolem.State state);
+
     /**
      * Get the current oxidizing state of the copper golem.
      *
@@ -125,4 +139,15 @@ sealed interface AtTime extends Oxidizing permits AtTimeImpl {
         @ApiStatus.Internal
         record AtTimeImpl(long time) implements AtTime {}
     }
+
+    @NullMarked
+    enum State {
+        // Start generate - CopperGolemState
+        IDLE,
+        GETTING_ITEM,
+        GETTING_NO_ITEM,
+        DROPPING_ITEM,
+        DROPPING_NO_ITEM;
+        // End generate - CopperGolemState
+    }
 }

paper-generator/src/main/java/io/papermc/generator/Rewriters.java

@@ -66,6 +66,7 @@
 import org.bukkit.entity.Boat;
 import org.bukkit.entity.Cat;
 import org.bukkit.entity.Chicken;
+import org.bukkit.entity.CopperGolem;
 import org.bukkit.entity.Cow;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Fox;
@@ -142,6 +143,7 @@ protected EnumValue.Builder rewriteEnumValue(net.minecraft.world.entity.animal.p
             .register("SoundCategory", SoundCategory.class, new EnumCloneRewriter<>(SoundSource.class))
             .register("AttributeSentiment", Attribute.Sentiment.class, new EnumCloneRewriter<>(net.minecraft.world.entity.ai.attributes.Attribute.Sentiment.class))
             .register("WeatheringCopperState", WeatheringCopperState.class, new EnumCloneRewriter<>(WeatheringCopper.WeatherState.class))
+            .register("CopperGolemState", CopperGolem.State.class, new EnumCloneRewriter<>(net.minecraft.world.entity.animal.golem.CopperGolemState.class))
             .register(ClientOption.class, composite(
                 holder("ChatVisibility", ClientOption.ChatVisibility.class, new EnumCloneRewriter<>(ChatVisiblity.class) {
                     @Override

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftCopperGolem.java

@@ -3,6 +3,7 @@
 import com.google.common.base.Preconditions;
 import io.papermc.paper.entity.PaperShearable;
 import io.papermc.paper.world.WeatheringCopperState;
+import net.minecraft.world.entity.animal.golem.CopperGolemState;
 import net.minecraft.world.level.block.WeatheringCopper;
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.entity.CopperGolem;
@@ -30,6 +31,17 @@ public void setWeatheringState(final WeatheringCopperState state) {
         this.getHandle().setWeatherState(WeatheringCopper.WeatherState.valueOf(state.name()));
     }
 
+    @Override
+    public CopperGolem.State getState() {
+        return State.valueOf(this.getHandle().getState().name());
+    }
+
+    @Override
+    public void setState(final CopperGolem.State state) {
+        Preconditions.checkArgument(state != null, "state cannot be null");
+        this.getHandle().setState(CopperGolemState.valueOf(state.name()));
+    }
+
     @Override
     public Oxidizing getOxidizing() {
         long value = this.getHandle().nextWeatheringTick;