CurseItemDropsSystem.java

package com.hypixel.hytale.builtin.portals.systems.curse;

import com.hypixel.hytale.builtin.portals.resources.PortalWorld;
import com.hypixel.hytale.component.AddReason;
import com.hypixel.hytale.component.CommandBuffer;
import com.hypixel.hytale.component.Ref;
import com.hypixel.hytale.component.RemoveReason;
import com.hypixel.hytale.component.Store;
import com.hypixel.hytale.component.query.Query;
import com.hypixel.hytale.component.system.RefSystem;
import com.hypixel.hytale.server.core.asset.type.item.config.metadata.AdventureMetadata;
import com.hypixel.hytale.server.core.inventory.ItemStack;
import com.hypixel.hytale.server.core.modules.entity.item.ItemComponent;
import com.hypixel.hytale.server.core.universe.world.storage.EntityStore;
import java.util.Set;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class CurseItemDropsSystem extends RefSystem<EntityStore> {
   public CurseItemDropsSystem() {
   }

   public void onEntityAdded(@Nonnull Ref<EntityStore> ref, @Nonnull AddReason reason, @Nonnull Store<EntityStore> store, @Nonnull CommandBuffer<EntityStore> commandBuffer) {
      PortalWorld portalWorld = (PortalWorld)store.getResource(PortalWorld.getResourceType());
      if (portalWorld.exists()) {
         Set<String> cursedItemsInWorld = portalWorld.getPortalType().getCursedItems();
         if (!cursedItemsInWorld.isEmpty()) {
            ItemComponent itemComponent = (ItemComponent)store.getComponent(ref, ItemComponent.getComponentType());
            ItemStack itemStack = itemComponent.getItemStack();
            if (itemStack != null) {
               String itemId = itemStack.getItemId().toString();
               if (cursedItemsInWorld.contains(itemId)) {
                  AdventureMetadata adventureMeta = (AdventureMetadata)itemStack.getFromMetadataOrDefault("Adventure", AdventureMetadata.CODEC);
                  adventureMeta.setCursed(true);
                  ItemStack cursed = itemStack.withMetadata(AdventureMetadata.KEYED_CODEC, adventureMeta);
                  itemComponent.setItemStack(cursed);
               }
            }
         }
      }
   }

   public void onEntityRemove(@Nonnull Ref<EntityStore> ref, @Nonnull RemoveReason reason, @Nonnull Store<EntityStore> store, @Nonnull CommandBuffer<EntityStore> commandBuffer) {
   }

   @Nullable
   public Query<EntityStore> getQuery() {
      return ItemComponent.getComponentType();
   }
}