Start working on recipe rewriting

api/src/main/java/com/viaversion/viaversion/api/minecraft/HolderSet.java

@@ -36,7 +36,7 @@ public interface HolderSet {
      * @return a new holder set
      */
     static HolderSet of(final String tagKey) {
-        return new HolderSetImpl(tagKey);
+        return new HolderSetImpl.Tag(tagKey);
     }
 
     /**
@@ -46,7 +46,7 @@ public interface HolderSet {
      * @return a new holder set
      */
     static HolderSet of(final int[] ids) {
-        return new HolderSetImpl(ids);
+        return new HolderSetImpl.Ids(ids);
     }
 
     /**

api/src/main/java/com/viaversion/viaversion/api/minecraft/HolderSetImpl.java

@@ -22,50 +22,63 @@
  */
 package com.viaversion.viaversion.api.minecraft;
 
-import com.viaversion.viaversion.util.EitherImpl;
 import it.unimi.dsi.fastutil.ints.Int2IntFunction;
+import java.util.Arrays;
 
-final class HolderSetImpl extends EitherImpl<String, int[]> implements HolderSet {
+final class HolderSetImpl {
-
-    HolderSetImpl(final String tagKey) {
-        super(tagKey, null);
-    }
-
-    HolderSetImpl(final int[] ids) {
-        super(null, ids);
-    }
-
-    @Override
-    public String tagKey() {
-        return left();
-    }
 
+    record Tag(String tagKey) implements HolderSet {
         @Override
         public boolean hasTagKey() {
-        return isLeft();
+            return true;
         }
 
         @Override
         public int[] ids() {
-        return right();
+            throw new IllegalArgumentException("This holder set has a tag key");
         }
 
         @Override
         public boolean hasIds() {
-        return isRight();
+            return false;
         }
 
         @Override
         public HolderSet rewrite(final Int2IntFunction idRewriter) {
-        if (hasTagKey()) {
             return this;
         }
+    }
 
-        final int[] ids = ids();
+    record Ids(int[] ids) implements HolderSet {
+        @Override
+        public boolean hasTagKey() {
+            return false;
+        }
+
+        @Override
+        public String tagKey() {
+            throw new IllegalArgumentException("This holder set has direct ids");
+        }
+
+        @Override
+        public boolean hasIds() {
+            return true;
+        }
+
+        @Override
+        public HolderSet rewrite(final Int2IntFunction idRewriter) {
             final int[] mappedIds = new int[ids.length];
             for (int i = 0; i < mappedIds.length; i++) {
                 mappedIds[i] = idRewriter.applyAsInt(ids[i]);
             }
-        return new HolderSetImpl(mappedIds);
+            return new Ids(mappedIds);
+        }
+
+        @Override
+        public String toString() {
+            return "Ids{" +
+                "ids=" + Arrays.toString(ids) +
+                '}';
+        }
     }
 }

common/src/main/java/com/viaversion/viaversion/protocols/template/BlockItemPacketRewriter1_99.java

@@ -23,7 +23,7 @@ import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundPac
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundPackets1_20_5;
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPacket1_21;
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
-import com.viaversion.viaversion.protocols.v1_21to1_21_2.rewriter.RecipeRewriter1_21_2;
+import com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;
 import com.viaversion.viaversion.rewriter.BlockRewriter;
 import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
 
@@ -70,9 +70,11 @@ final class BlockItemPacketRewriter1_99 extends StructuredItemRewriter<Clientbou
         registerLevelParticles1_20_5(ClientboundPackets1_21.LEVEL_PARTICLES);
         registerExplosion1_21_2(ClientboundPackets1_21.EXPLODE); // Rewrites the included sound and particles
 
-        new RecipeRewriter1_21_2<>(protocol).register1_20_5(ClientboundPackets1_21.UPDATE_RECIPES);
+        final RecipeDisplayRewriter<ClientboundPacket1_21> recipeRewriter = new RecipeDisplayRewriter<>(protocol);
+        recipeRewriter.registerUpdateRecipes(ClientboundPackets1_21.UPDATE_RECIPES);
+        //recipeRewriter.registerRecipeBookAdd(ClientboundPackets1_21.RECIPE_BOOK_ADD);
+        recipeRewriter.registerPlaceGhostRecipe(ClientboundPackets1_21.PLACE_GHOST_RECIPE);
         // OR do this if serialization of recipes changed and override the relevant method
-        // Add new serializers to RecipeRewriter, or extend the last one for changes
+        // Add new serializers to RecipeDisplayRewriter, or extend the last one for changes
-        // new RecipeRewriter1_21_2<ClientboundPacket1_21>(this) {}.register1_20_5(ClientboundPackets1_21.DECLARE_RECIPES);
     }
 }

common/src/main/java/com/viaversion/viaversion/protocols/v1_21to1_21_2/rewriter/BlockItemPacketRewriter1_21_2.java

@@ -193,7 +193,7 @@ public final class BlockItemPacketRewriter1_21_2 extends StructuredItemRewriter<
         });
 
         protocol.registerClientbound(ClientboundPackets1_21.UPDATE_RECIPES, wrapper -> {
-            final RecipeRewriter rewriter = new RecipeRewriter(protocol);
+            final RecipeRewriter1_21_2 rewriter = new RecipeRewriter1_21_2(protocol); // Holds state, create a new one for each packet
             wrapper.cancel(); // TODO
 
             final int size = wrapper.passthrough(Types.VAR_INT);

common/src/main/java/com/viaversion/viaversion/protocols/v1_21to1_21_2/rewriter/RecipeRewriter.java

@@ -1,94 +0,0 @@
-/*
- * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2024 ViaVersion and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viaversion.protocols.v1_21to1_21_2.rewriter;
-
-import com.viaversion.viaversion.api.minecraft.HolderSet;
-import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.viaversion.api.protocol.Protocol;
-import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
-import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.rewriter.RecipeRewriter1_20_3;
-import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPacket1_21;
-
-final class RecipeRewriter extends RecipeRewriter1_20_3<ClientboundPacket1_21> {
-
-    RecipeRewriter(final Protocol<ClientboundPacket1_21, ?, ?, ?> protocol) {
-        super(protocol);
-    }
-
-    @Override
-    protected void handleIngredient(final PacketWrapper wrapper) {
-        wrapper.write(Types.HOLDER_SET, ingredient(wrapper));
-    }
-
-    @Override
-    public void handleCraftingShaped(final PacketWrapper wrapper) {
-        wrapper.passthrough(Types.STRING); // Group
-        wrapper.passthrough(Types.VAR_INT); // Crafting book category
-        final int width = wrapper.passthrough(Types.VAR_INT);
-        final int height = wrapper.passthrough(Types.VAR_INT);
-        final int ingredients = width * height;
-
-        wrapper.write(Types.VAR_INT, ingredients);
-        for (int i = 0; i < ingredients; i++) {
-            wrapper.write(Types.HOLDER_SET, ingredient(wrapper));
-        }
-
-        wrapper.write(mappedItemType(), rewrite(wrapper.user(), wrapper.read(itemType()))); // Result
-        wrapper.passthrough(Types.BOOLEAN); // Show notification
-    }
-
-    @Override
-    public void handleCraftingShapeless(final PacketWrapper wrapper) {
-        wrapper.passthrough(Types.STRING); // Group
-        wrapper.passthrough(Types.VAR_INT); // Crafting book category
-
-        final int ingredients = wrapper.read(Types.VAR_INT);
-        final HolderSet[] ingredient = new HolderSet[ingredients];
-        for (int i = 0; i < ingredients; i++) {
-            ingredient[i] = ingredient(wrapper);
-        }
-
-        wrapper.write(mappedItemType(), rewrite(wrapper.user(), wrapper.read(itemType())));
-
-        // Also moved below here
-        wrapper.write(Types.VAR_INT, ingredients);
-        for (final HolderSet item : ingredient) {
-            wrapper.write(Types.HOLDER_SET, item);
-        }
-    }
-
-    private HolderSet ingredient(final PacketWrapper wrapper) {
-        final Item[] items = wrapper.read(itemArrayType());
-        final int[] ids = new int[items.length];
-        for (int i = 0; i < items.length; i++) {
-            final Item item = rewrite(wrapper.user(), items[i]);
-            ids[i] = item.identifier();
-        }
-        return HolderSet.of(ids);
-    }
-
-    @Override
-    public void handleRecipeType(final PacketWrapper wrapper, final String type) {
-        if (type.equals("crafting_special_suspiciousstew") || type.equals("crafting_special_shulkerboxcoloring")) {
-            wrapper.read(Types.VAR_INT); // Crafting book category
-        } else {
-            super.handleRecipeType(wrapper, type);
-        }
-    }
-}

common/src/main/java/com/viaversion/viaversion/protocols/v1_21to1_21_2/rewriter/RecipeRewriter1_21_2.java

@@ -17,63 +17,161 @@
  */
 package com.viaversion.viaversion.protocols.v1_21to1_21_2.rewriter;
 
-import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.data.MappingData;
 import com.viaversion.viaversion.api.minecraft.HolderSet;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.Protocol;
-import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.rewriter.RecipeRewriter1_20_3;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPacket1_21;
+import it.unimi.dsi.fastutil.ints.IntArrayList;
+import it.unimi.dsi.fastutil.ints.IntCollection;
+import it.unimi.dsi.fastutil.ints.IntList;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
+import java.util.ArrayList;
+import java.util.List;
 
-// Dead as of 1.21.2, the server only sends simple recipe display data instead of full results
+final class RecipeRewriter1_21_2 extends RecipeRewriter1_20_3<ClientboundPacket1_21> {
-public class RecipeRewriter1_21_2<C extends ClientboundPacketType> extends RecipeRewriter1_20_3<C> {
 
-    public RecipeRewriter1_21_2(final Protocol<C, ?, ?, ?> protocol) {
+    private final List<ShapelessRecipe> shapelessRecipes = new ArrayList<>();
+    private final List<ShapedRecipe> shapedRecipes = new ArrayList<>();
+    private final List<SmithingRecipe> smithingRecipes = new ArrayList<>();
+    private final List<StoneCutterRecipe> stoneCutterRecipes = new ArrayList<>();
+    private final List<SimpleRecipe> simpleRecipes = new ArrayList<>();
+    private final Object2IntMap<String> recipeGroups = new Object2IntOpenHashMap<>();
+    // TODO
+    private final IntList smithingAddition = new IntArrayList();
+    private final IntList smithingTemplate = new IntArrayList();
+    private final IntList smithingBase = new IntArrayList();
+    private final IntList furnaceInput = new IntArrayList();
+    private final IntList smokerInput = new IntArrayList();
+    private final IntList blastFurnaceInput = new IntArrayList();
+    private final IntList campfireInput = new IntArrayList();
+
+    record SimpleRecipe(int category) {
+    }
+
+    record ShapelessRecipe(int group, int category, HolderSet[] ingredients, Item result) {
+    }
+
+    record ShapedRecipe(int group, int category, int width, int height, HolderSet[] ingredients, Item result) {
+    }
+
+    record StoneCutterRecipe(int group, HolderSet ingredient, Item result) {
+    }
+
+    record SmithingRecipe(HolderSet ingredient, Item result) {
+    }
+
+    RecipeRewriter1_21_2(final Protocol<ClientboundPacket1_21, ?, ?, ?> protocol) {
         super(protocol);
+        // TODO ?
+        recipeHandlers.put("smelting", wrapper -> handleSmelting(wrapper, furnaceInput));
+        recipeHandlers.put("blasting", wrapper -> handleSmelting(wrapper, blastFurnaceInput));
+        recipeHandlers.put("smoking", wrapper -> handleSmelting(wrapper, smokerInput));
+        recipeHandlers.put("campfire_cooking", wrapper -> handleSmelting(wrapper, campfireInput));
+        recipeGroups.defaultReturnValue(-1);
+    }
+
+    private HolderSet readIngredient(final PacketWrapper wrapper) {
+        // Ingredients are no longer full items, already store them as just holder sets
+        final Item[] items = wrapper.read(itemArrayType());
+        final int[] ids = new int[items.length];
+        final MappingData mappings = protocol.getMappingData();
+        for (int i = 0; i < items.length; i++) {
+            final Item item = items[i];
+            ids[i] = mappings.getNewItemId(item.identifier());
+        }
+        return HolderSet.of(ids);
+    }
+
+    private void readIngredientToList(final PacketWrapper wrapper, final IntCollection list) {
+        final Item[] items = wrapper.read(itemArrayType());
+        final MappingData mappings = protocol.getMappingData();
+        for (final Item item : items) {
+            final int mappedId = mappings.getNewItemId(item.identifier());
+            list.add(mappedId);
+        }
+    }
+
+    @Override
+    public void handleSimpleRecipe(final PacketWrapper wrapper) {
+        final int category = wrapper.read(Types.VAR_INT);
+        simpleRecipes.add(new SimpleRecipe(category));
+    }
+
+    @Override
+    public void handleStonecutting(final PacketWrapper wrapper) {
+        final int group = recipeGroupId(wrapper.read(Types.STRING));
+        final HolderSet ingredient = readIngredient(wrapper);
+        final Item result = rewrite(wrapper.user(), wrapper.read(itemType()));
+        stoneCutterRecipes.add(new StoneCutterRecipe(group, ingredient, result));
+    }
+
+    private int recipeGroupId(final String recipeGroup) {
+        final int size = recipeGroups.size();
+        final int value = recipeGroups.putIfAbsent(recipeGroup, size);
+        return value != -1 ? value : size;
+    }
+
+    @Override
+    public void handleSmithingTransform(final PacketWrapper wrapper) {
+        final IntList template = new IntArrayList();
+        readIngredientToList(wrapper, template);
+        smithingTemplate.addAll(template);
+        readIngredientToList(wrapper, smithingBase);
+        readIngredientToList(wrapper, smithingAddition);
+        final Item result = rewrite(wrapper.user(), wrapper.read(itemType()));
+        smithingRecipes.add(new SmithingRecipe(HolderSet.of(template.toIntArray()), result)); // TODO ?
+    }
+
+    @Override
+    public void handleSmithingTrim(final PacketWrapper wrapper) {
+        readIngredientToList(wrapper, smithingTemplate);
+        readIngredientToList(wrapper, smithingBase);
+        readIngredientToList(wrapper, smithingAddition);
     }
 
     @Override
     public void handleCraftingShaped(final PacketWrapper wrapper) {
-        wrapper.passthrough(Types.STRING); // Group
+        final int group = recipeGroupId(wrapper.read(Types.STRING));
-        wrapper.passthrough(Types.VAR_INT); // Crafting book category
+        final int category = wrapper.read(Types.VAR_INT);
-        wrapper.passthrough(Types.VAR_INT); // Width
+        final int width = wrapper.read(Types.VAR_INT);
-        wrapper.passthrough(Types.VAR_INT); // Height
+        final int height = wrapper.read(Types.VAR_INT);
-
+        final int ingredientsSize = width * height;
-        final int ingredients = wrapper.passthrough(Types.VAR_INT);
+        final HolderSet[] ingredients = new HolderSet[ingredientsSize];
-        for (int i = 0; i < ingredients; i++) {
+        for (int i = 0; i < ingredientsSize; i++) {
-            handleIngredient(wrapper);
+            ingredients[i] = readIngredient(wrapper);
         }
+        final Item result = rewrite(wrapper.user(), wrapper.read(itemType()));
+        shapedRecipes.add(new ShapedRecipe(group, category, width, height, ingredients, result));
 
-        wrapper.write(mappedItemType(), rewrite(wrapper.user(), wrapper.read(itemType()))); // Result
+        wrapper.read(Types.BOOLEAN); // Show notification
-        wrapper.passthrough(Types.BOOLEAN); // Show notification
     }
 
     @Override
     public void handleCraftingShapeless(final PacketWrapper wrapper) {
-        wrapper.passthrough(Types.STRING); // Group
+        final int group = recipeGroupId(wrapper.read(Types.STRING));
-        wrapper.passthrough(Types.VAR_INT); // Crafting book category
+        final int category = wrapper.read(Types.VAR_INT);
-        wrapper.write(mappedItemType(), rewrite(wrapper.user(), wrapper.read(itemType()))); // Result
+        final int ingredientsSize = wrapper.read(Types.VAR_INT);
-        handleIngredients(wrapper);
+        final HolderSet[] ingredients = new HolderSet[ingredientsSize];
+        for (int i = 0; i < ingredientsSize; i++) {
+            ingredients[i] = readIngredient(wrapper);
         }
 
-    @Override
+        final Item result = rewrite(wrapper.user(), wrapper.read(itemType()));
-    protected void handleIngredient(final PacketWrapper wrapper) {
+        shapelessRecipes.add(new ShapelessRecipe(group, category, ingredients, result));
-        final HolderSet items = wrapper.passthrough(Types.HOLDER_SET);
-        if (items.hasTagKey()) {
-            return;
     }
 
-        final int[] ids = items.ids();
+    private void handleSmelting(final PacketWrapper wrapper, final IntCollection list) {
-        for (int i = 0; i < ids.length; i++) {
+        final int group = recipeGroupId(wrapper.read(Types.STRING));
-            ids[i] = rewriteItemId(wrapper.user(), ids[i]);
+        final int category = wrapper.read(Types.VAR_INT);
-        }
+        readIngredientToList(wrapper, list);
-    }
+        wrapper.read(itemType()); // Result
 
-    protected int rewriteItemId(final UserConnection connection, final int id) {
+        wrapper.read(Types.FLOAT); // EXP
-        if (protocol.getMappingData() != null && protocol.getMappingData().getItemMappings() != null) {
+        wrapper.read(Types.VAR_INT); // Cooking time
-            return protocol.getMappingData().getItemMappings().getNewIdOrDefault(id, id);
-        }
-        return id;
     }
 }

common/src/main/java/com/viaversion/viaversion/rewriter/RecipeDisplayRewriter.java

@@ -0,0 +1,175 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.rewriter;
+
+import com.viaversion.viaversion.api.minecraft.HolderSet;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.protocol.Protocol;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.rewriter.ItemRewriter;
+import com.viaversion.viaversion.api.type.Types;
+
+// Base for 1.21.2 and onwards
+public class RecipeDisplayRewriter<C extends ClientboundPacketType> {
+    protected final Protocol<C, ?, ?, ?> protocol;
+
+    public RecipeDisplayRewriter(final Protocol<C, ?, ?, ?> protocol) {
+        this.protocol = protocol;
+    }
+
+    public void registerUpdateRecipes(final C packetType) {
+        protocol.registerClientbound(packetType, wrapper -> {
+            final int size = wrapper.passthrough(Types.VAR_INT);
+            for (int i = 0; i < size; i++) {
+                wrapper.passthrough(Types.STRING); // Recipe group
+                rewriteItemIds(wrapper.passthrough(Types.VAR_INT_ARRAY_PRIMITIVE));
+            }
+
+            final int stonecutterRecipesSize = wrapper.passthrough(Types.VAR_INT);
+            for (int i = 0; i < stonecutterRecipesSize; i++) {
+                handleIngredient(wrapper);
+                handleSlotDisplay(wrapper);
+            }
+        });
+    }
+
+    public void registerRecipeBookAdd(final C packetType) {
+        protocol.registerClientbound(packetType, wrapper -> {
+            final int size = wrapper.passthrough(Types.VAR_INT);
+            for (int i = 0; i < size; i++) {
+                wrapper.passthrough(Types.VAR_INT); // Display ID
+                handleRecipeDisplay(wrapper);
+                wrapper.passthrough(Types.OPTIONAL_VAR_INT); // Group
+                wrapper.passthrough(Types.VAR_INT); // Category
+                if (wrapper.passthrough(Types.BOOLEAN)) {
+                    final int ingredientsSize = wrapper.passthrough(Types.VAR_INT);
+                    for (int j = 0; j < ingredientsSize; j++) {
+                        handleIngredient(wrapper); // Items
+                    }
+                }
+                wrapper.passthrough(Types.BYTE); // Flags
+            }
+        });
+    }
+
+    public void registerPlaceGhostRecipe(final C packetType) {
+        protocol.registerClientbound(packetType, wrapper -> {
+            wrapper.passthrough(Types.VAR_INT); // Container ID
+            handleRecipeDisplay(wrapper);
+        });
+    }
+
+    protected void handleShapeless(final PacketWrapper wrapper) {
+        handleSlotDisplayList(wrapper); // Ingredients
+        handleSlotDisplay(wrapper); // Result
+        handleSlotDisplay(wrapper); // Crafting station
+    }
+
+    protected void handleShaped(final PacketWrapper wrapper) {
+        wrapper.passthrough(Types.VAR_INT); // Width
+        wrapper.passthrough(Types.VAR_INT); // Height
+        handleSlotDisplayList(wrapper); // Ingredients
+        handleSlotDisplay(wrapper); // Result
+        handleSlotDisplay(wrapper); // Crafting station
+    }
+
+    protected void handleFurnace(final PacketWrapper wrapper) {
+        handleSlotDisplay(wrapper); // Ingredient
+        handleSlotDisplay(wrapper); // Fuel
+        handleSlotDisplay(wrapper); // Result
+        handleSlotDisplay(wrapper); // Crafting station
+    }
+
+    protected void handleStoneCutter(final PacketWrapper wrapper) {
+        handleSlotDisplay(wrapper); // Result
+        handleSlotDisplay(wrapper); // Crafting station
+    }
+
+    protected void handleSmithing(final PacketWrapper wrapper) {
+        handleSlotDisplay(wrapper); // Result
+        handleSlotDisplay(wrapper); // Crafting station
+    }
+
+    protected void handleSlotDisplayList(final PacketWrapper wrapper) {
+        final int size = wrapper.passthrough(Types.VAR_INT);
+        for (int i = 0; i < size; i++) {
+            handleSlotDisplay(wrapper);
+        }
+    }
+
+    protected void handleRecipeDisplay(final PacketWrapper wrapper) {
+        final int type = wrapper.passthrough(Types.VAR_INT);
+        switch (type) {
+            case 0 -> handleShapeless(wrapper);
+            case 1 -> handleShaped(wrapper);
+            case 2 -> handleFurnace(wrapper);
+            case 3 -> handleStoneCutter(wrapper);
+            case 4 -> handleSmithing(wrapper);
+        }
+    }
+
+    protected void handleSlotDisplay(final PacketWrapper wrapper) {
+        // empty, any_fuel, smithing_trim are empty
+        final int type = wrapper.passthrough(Types.VAR_INT);
+        switch (type) {
+            case 2 -> handleItemId(wrapper); // Item type
+            case 3 -> handleItem(wrapper); // Item
+            case 4 -> wrapper.passthrough(Types.STRING); // Tag key
+            case 6 -> handleSlotDisplayList(wrapper); // Composite
+        }
+    }
+
+    protected void handleIngredient(final PacketWrapper wrapper) {
+        final HolderSet items = wrapper.passthrough(Types.HOLDER_SET);
+        if (items.hasTagKey()) {
+            return;
+        }
+
+        final int[] ids = items.ids();
+        for (int i = 0; i < ids.length; i++) {
+            ids[i] = rewriteItemId(ids[i]);
+        }
+    }
+
+    protected void handleItemId(final PacketWrapper wrapper) {
+        final int id = wrapper.passthrough(Types.VAR_INT);
+        wrapper.write(Types.VAR_INT, rewriteItemId(id));
+    }
+
+    protected void handleItem(final PacketWrapper wrapper) {
+        final ItemRewriter<?> itemRewriter = protocol.getItemRewriter();
+        final Item item = wrapper.read(itemRewriter.itemType());
+        itemRewriter.handleItemToClient(wrapper.user(), item);
+        wrapper.write(itemRewriter.mappedItemType(), item);
+    }
+
+    protected int rewriteItemId(final int id) {
+        if (protocol.getMappingData() != null && protocol.getMappingData().getItemMappings() != null) {
+            return protocol.getMappingData().getItemMappings().getNewIdOrDefault(id, id);
+        }
+        return id;
+    }
+
+    protected void rewriteItemIds(final int[] ids) {
+        for (int i = 0; i < ids.length; i++) {
+            final int id = ids[i];
+            ids[i] = rewriteItemId(id);
+        }
+    }
+}

common/src/main/java/com/viaversion/viaversion/rewriter/RecipeRewriter.java

@@ -30,6 +30,7 @@ import java.util.HashMap;
 import java.util.Map;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+// Base up to and including 1.21.1
 public class RecipeRewriter<C extends ClientboundPacketType> {
 
     protected final Protocol<C, ?, ?, ?> protocol;
@@ -54,9 +55,6 @@ public class RecipeRewriter<C extends ClientboundPacketType> {
         recipeHandlers.put("smithing_transform", this::handleSmithingTransform);
         recipeHandlers.put("smithing_trim", this::handleSmithingTrim);
         recipeHandlers.put("crafting_decorated_pot", this::handleSimpleRecipe);
-
-        // Added in 1.21.2
-        recipeHandlers.put("crafting_transmute", this::handleTransmute);
     }
 
     public void handleRecipeType(PacketWrapper wrapper, String type) {
@@ -163,15 +161,6 @@ public class RecipeRewriter<C extends ClientboundPacketType> {
         handleIngredient(wrapper); // Additions
     }
 
-    private void handleTransmute(final PacketWrapper wrapper) {
-        wrapper.passthrough(Types.STRING); // Group
-        wrapper.passthrough(Types.VAR_INT); // Crafting book category
-        handleIngredient(wrapper); // Input
-        handleIngredient(wrapper); // Material
-        final int resultItemId = wrapper.read(Types.VAR_INT);
-        wrapper.write(Types.VAR_INT, rewrite(resultItemId));
-    }
-
     protected int rewrite(final int itemId) {
         if (protocol.getMappingData() != null && protocol.getItemRewriter() != null) {
             return protocol.getMappingData().getNewItemId(itemId);