custom tags

src/main/java/net/kaupenjoe/tutorialmod/block/custom/MagicBlock.java

@@ -1,6 +1,7 @@
 package net.kaupenjoe.tutorialmod.block.custom;
 
 import net.kaupenjoe.tutorialmod.item.ModItems;
+import net.kaupenjoe.tutorialmod.util.ModTags;
 import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
@@ -35,14 +36,18 @@ protected ActionResult onUse(BlockState state, World world, BlockPos pos, Player
     @Override
     public void onSteppedOn(World world, BlockPos pos, BlockState state, Entity entity) {
         if(entity instanceof ItemEntity itemEntity) {
-            if(itemEntity.getStack().getItem() == ModItems.RAW_PINK_GARNET) {
+            if(isValidItem(itemEntity.getStack())) {
                 itemEntity.setStack(new ItemStack(Items.DIAMOND, itemEntity.getStack().getCount()));
             }
         }
 
         super.onSteppedOn(world, pos, state, entity);
     }
 
+    private boolean isValidItem(ItemStack stack) {
+        return stack.isIn(ModTags.Items.TRANSFORMABLE_ITEMS);
+    }
+
     @Override
     public void appendTooltip(ItemStack stack, Item.TooltipContext context, List<Text> tooltip, TooltipType options) {
         tooltip.add(Text.translatable("tooltip.tutorialmod.magic_block.tooltip"));

src/main/java/net/kaupenjoe/tutorialmod/util/ModTags.java

@@ -0,0 +1,25 @@
+package net.kaupenjoe.tutorialmod.util;
+
+import net.kaupenjoe.tutorialmod.TutorialMod;
+import net.minecraft.block.Block;
+import net.minecraft.item.Item;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.tag.TagKey;
+import net.minecraft.util.Identifier;
+
+public class ModTags {
+    public static class Blocks {
+
+        private static TagKey<Block> createTag(String name) {
+            return TagKey.of(RegistryKeys.BLOCK, Identifier.of(TutorialMod.MOD_ID, name));
+        }
+    }
+
+    public static class Items {
+        public static final TagKey<Item> TRANSFORMABLE_ITEMS = createTag("transformable_items");
+
+        private static TagKey<Item> createTag(String name) {
+            return TagKey.of(RegistryKeys.ITEM, Identifier.of(TutorialMod.MOD_ID, name));
+        }
+    }
+}

src/main/resources/data/tutorialmod/tags/item/transformable_items.json

@@ -0,0 +1,9 @@
+{
+  "values": [
+    "tutorialmod:pink_garnet",
+    "tutorialmod:raw_pink_garnet",
+    "minecraft:coal",
+    "minecraft:stick",
+    "minecraft:apple"
+  ]
+}