24w10a, more item component work

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

@@ -31,13 +31,13 @@ public final class GameProfile {
     private final UUID id;
     private final Property[] properties;
 
-    public GameProfile(final String name, @Nullable final UUID id, final Property[] properties) {
+    public GameProfile(@Nullable final String name, @Nullable final UUID id, final Property[] properties) {
         this.name = name;
         this.id = id;
         this.properties = properties;
     }
 
-    public String name() {
+    public @Nullable String name() {
         return name;
     }
 

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/EmptyStructuredData.java

@@ -67,4 +67,28 @@ final class EmptyStructuredData<T> implements StructuredData<T> {
     public int id() {
         return this.id;
     }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        final EmptyStructuredData<?> that = (EmptyStructuredData<?>) o;
+        if (id != that.id) return false;
+        return key.equals(that.key);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = key.hashCode();
+        result = 31 * result + id;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "EmptyStructuredData{" +
+            "key=" + key +
+            ", id=" + id +
+            '}';
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/FilledStructuredData.java

@@ -24,6 +24,7 @@ package com.viaversion.viaversion.api.minecraft.data;
 
 import com.google.common.base.Preconditions;
 import io.netty.buffer.ByteBuf;
+import java.util.Objects;
 
 final class FilledStructuredData<T> implements StructuredData<T> {
 
@@ -72,4 +73,31 @@ final class FilledStructuredData<T> implements StructuredData<T> {
     public int id() {
         return id;
     }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        final FilledStructuredData<?> that = (FilledStructuredData<?>) o;
+        if (id != that.id) return false;
+        if (!key.equals(that.key)) return false;
+        return Objects.equals(value, that.value);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = key.hashCode();
+        result = 31 * result + (value != null ? value.hashCode() : 0);
+        result = 31 * result + id;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "FilledStructuredData{" +
+            "key=" + key +
+            ", value=" + value +
+            ", id=" + id +
+            '}';
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/StructuredDataContainer.java

@@ -25,6 +25,7 @@ package com.viaversion.viaversion.api.minecraft.data;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.data.FullMappings;
 import com.viaversion.viaversion.api.protocol.Protocol;
+import com.viaversion.viaversion.util.Unit;
 import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
 import java.util.Map;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -68,13 +69,17 @@ public final class StructuredDataContainer {
         return data != null && data.isPresent() ? data : null;
     }
 
-    public <T> void add(final StructuredDataKey<T> key, final T value) {
+    public <T> void set(final StructuredDataKey<T> key, final T value) {
         final int id = serializerId(key);
         if (id != -1) {
             this.data.put(key, StructuredData.of(key, value, id));
         }
     }
 
+    public void set(final StructuredDataKey<Unit> key) {
+        this.set(key, Unit.INSTANCE);
+    }
+
     public void addEmpty(final StructuredDataKey<?> key) {
         // Empty optional to override the Minecraft default
         this.data.put(key, StructuredData.empty(key, serializerId(key)));

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/StructuredDataKey.java

@@ -30,7 +30,7 @@ import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.item.data.AdventureModePredicate;
 import com.viaversion.viaversion.api.minecraft.item.data.ArmorTrim;
 import com.viaversion.viaversion.api.minecraft.item.data.AttributeModifiers;
-import com.viaversion.viaversion.api.minecraft.item.data.BannerPattern;
+import com.viaversion.viaversion.api.minecraft.item.data.BannerPatternLayer;
 import com.viaversion.viaversion.api.minecraft.item.data.Bee;
 import com.viaversion.viaversion.api.minecraft.item.data.BlockStateProperties;
 import com.viaversion.viaversion.api.minecraft.item.data.DyedColor;
@@ -38,7 +38,7 @@ import com.viaversion.viaversion.api.minecraft.item.data.Enchantments;
 import com.viaversion.viaversion.api.minecraft.item.data.FireworkExplosion;
 import com.viaversion.viaversion.api.minecraft.item.data.Fireworks;
 import com.viaversion.viaversion.api.minecraft.item.data.Instrument;
-import com.viaversion.viaversion.api.minecraft.item.data.LodestoneTarget;
+import com.viaversion.viaversion.api.minecraft.item.data.LodestoneTracker;
 import com.viaversion.viaversion.api.minecraft.item.data.PotionContents;
 import com.viaversion.viaversion.api.minecraft.item.data.SuspiciousStewEffect;
 import com.viaversion.viaversion.api.minecraft.item.data.WrittenBook;
@@ -82,12 +82,12 @@ public final class StructuredDataKey<T> {
     public static final StructuredDataKey<CompoundTag> BLOCK_ENTITY_DATA = new StructuredDataKey<>("block_entity_data", Type.COMPOUND_TAG);
     public static final StructuredDataKey<Holder<Instrument>> INSTRUMENT = new StructuredDataKey<>("instrument", Instrument.TYPE);
     public static final StructuredDataKey<String[]> RECIPES = new StructuredDataKey<>("recipes", Type.STRING_ARRAY);
-    public static final StructuredDataKey<LodestoneTarget> LODESTONE_TARGET = new StructuredDataKey<>("lodestone_target", LodestoneTarget.TYPE);
+    public static final StructuredDataKey<LodestoneTracker> LODESTONE_TRACKER = new StructuredDataKey<>("lodestone_tracker", LodestoneTracker.TYPE);
     public static final StructuredDataKey<FireworkExplosion> FIREWORK_EXPLOSION = new StructuredDataKey<>("firework_explosion", FireworkExplosion.TYPE);
     public static final StructuredDataKey<Fireworks> FIREWORKS = new StructuredDataKey<>("fireworks", Fireworks.TYPE);
     public static final StructuredDataKey<GameProfile> PROFILE = new StructuredDataKey<>("profile", Type.GAME_PROFILE);
     public static final StructuredDataKey<String> NOTE_BLOCK_SOUND = new StructuredDataKey<>("note_block_sound", Type.STRING);
-    public static final StructuredDataKey<BannerPattern[]> BANNER_PATTERNS = new StructuredDataKey<>("banner_patterns", BannerPattern.ARRAY_TYPE);
+    public static final StructuredDataKey<BannerPatternLayer[]> BANNER_PATTERNS = new StructuredDataKey<>("banner_patterns", BannerPatternLayer.ARRAY_TYPE);
     public static final StructuredDataKey<Integer> BASE_COLOR = new StructuredDataKey<>("base_color", Type.VAR_INT);
     public static final StructuredDataKey<int[]> POT_DECORATIONS = new StructuredDataKey<>("pot_decorations", Type.VAR_INT_ARRAY_PRIMITIVE);
     public static final StructuredDataKey<Item[]> CONTAINER = new StructuredDataKey<>("container", Types1_20_5.ITEM_ARRAY);

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/StructuredItem.java

@@ -29,13 +29,13 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 public class StructuredItem implements Item {
     private final StructuredDataContainer data;
     private int identifier;
-    private byte amount;
+    private int amount;
 
     public StructuredItem() {
-        this(0, (byte) 0, new StructuredDataContainer());
+        this(0, 0, new StructuredDataContainer());
     }
 
-    public StructuredItem(final int identifier, final byte amount, final StructuredDataContainer data) {
+    public StructuredItem(final int identifier, final int amount, final StructuredDataContainer data) {
         this.identifier = identifier;
         this.amount = amount;
         this.data = data;
@@ -58,10 +58,7 @@ public class StructuredItem implements Item {
 
     @Override
     public void setAmount(final int amount) {
-        if (amount > Byte.MAX_VALUE || amount < Byte.MIN_VALUE) {
+        this.amount = amount;
-            throw new IllegalArgumentException("Invalid item amount: " + amount);
-        }
-        this.amount = (byte) amount;
     }
 
     @Override

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/BannerPattern.java

@@ -23,40 +23,39 @@
 package com.viaversion.viaversion.api.minecraft.item.data;
 
 import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.viaversion.api.type.types.ArrayType;
+import com.viaversion.viaversion.api.type.types.misc.HolderType;
 import io.netty.buffer.ByteBuf;
 
 public final class BannerPattern {
 
-    public static final Type<BannerPattern> TYPE = new Type<BannerPattern>(BannerPattern.class) {
+    public static final HolderType<BannerPattern> TYPE = new HolderType<BannerPattern>() {
         @Override
-        public BannerPattern read(final ByteBuf buffer) throws Exception {
+        public BannerPattern readDirect(final ByteBuf buffer) throws Exception {
-            final int pattern = Type.VAR_INT.readPrimitive(buffer);
+            final String assetId = Type.STRING.read(buffer);
-            final int color = Type.VAR_INT.readPrimitive(buffer);
+            final String tanslationKey = Type.STRING.read(buffer);
-            return new BannerPattern(pattern, color);
+            return new BannerPattern(assetId, tanslationKey);
         }
 
         @Override
-        public void write(final ByteBuf buffer, final BannerPattern value) throws Exception {
+        public void writeDirect(final ByteBuf buffer, final BannerPattern value) throws Exception {
-            Type.VAR_INT.writePrimitive(buffer, value.pattern);
+            Type.STRING.write(buffer, value.assetId);
-            Type.VAR_INT.writePrimitive(buffer, value.color);
+            Type.STRING.write(buffer, value.tanslationKey);
         }
     };
-    public static final Type<BannerPattern[]> ARRAY_TYPE = new ArrayType<>(TYPE);
 
-    private final int pattern;
+    private final String assetId;
-    private final int color;
+    private final String tanslationKey;
 
-    public BannerPattern(final int pattern, final int color) {
+    public BannerPattern(final String assetId, final String tanslationKey) {
-        this.pattern = pattern;
+        this.assetId = assetId;
-        this.color = color;
+        this.tanslationKey = tanslationKey;
     }
 
-    public int pattern() {
+    public String assetId() {
-        return this.pattern;
+        return assetId;
     }
 
-    public int color() {
+    public String tanslationKey() {
-        return this.color;
+        return tanslationKey;
     }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/BannerPatternLayer.java

@@ -0,0 +1,63 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.minecraft.item.data;
+
+import com.viaversion.viaversion.api.minecraft.Holder;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.types.ArrayType;
+import io.netty.buffer.ByteBuf;
+
+public final class BannerPatternLayer {
+
+    public static final Type<BannerPatternLayer> TYPE = new Type<BannerPatternLayer>(BannerPatternLayer.class) {
+        @Override
+        public BannerPatternLayer read(final ByteBuf buffer) throws Exception {
+            final Holder<BannerPattern> pattern = BannerPattern.TYPE.read(buffer);
+            final DyedColor color = DyedColor.TYPE.read(buffer);
+            return new BannerPatternLayer(pattern, color);
+        }
+
+        @Override
+        public void write(final ByteBuf buffer, final BannerPatternLayer value) throws Exception {
+            BannerPattern.TYPE.write(buffer, value.pattern);
+            DyedColor.TYPE.write(buffer, value.color);
+        }
+    };
+    public static final Type<BannerPatternLayer[]> ARRAY_TYPE = new ArrayType<>(TYPE);
+
+    private final Holder<BannerPattern> pattern;
+    private final DyedColor color;
+
+    public BannerPatternLayer(final Holder<BannerPattern> pattern, final DyedColor color) {
+        this.pattern = pattern;
+        this.color = color;
+    }
+
+    public Holder<BannerPattern> pattern() {
+        return pattern;
+    }
+
+    public DyedColor color() {
+        return color;
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/LodestoneTracker.java

@@ -25,20 +25,21 @@ package com.viaversion.viaversion.api.minecraft.item.data;
 import com.viaversion.viaversion.api.minecraft.GlobalPosition;
 import com.viaversion.viaversion.api.type.Type;
 import io.netty.buffer.ByteBuf;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
-public final class LodestoneTarget {
+public final class LodestoneTracker {
 
-    public static final Type<LodestoneTarget> TYPE = new Type<LodestoneTarget>(LodestoneTarget.class) {
+    public static final Type<LodestoneTracker> TYPE = new Type<LodestoneTracker>(LodestoneTracker.class) {
         @Override
-        public LodestoneTarget read(final ByteBuf buffer) throws Exception {
+        public LodestoneTracker read(final ByteBuf buffer) throws Exception {
-            final GlobalPosition position = Type.GLOBAL_POSITION.read(buffer);
+            final GlobalPosition position = Type.OPTIONAL_GLOBAL_POSITION.read(buffer);
             final boolean tracked = buffer.readBoolean();
-            return new LodestoneTarget(position, tracked);
+            return new LodestoneTracker(position, tracked);
         }
 
         @Override
-        public void write(final ByteBuf buffer, final LodestoneTarget value) throws Exception {
+        public void write(final ByteBuf buffer, final LodestoneTracker value) throws Exception {
-            Type.GLOBAL_POSITION.write(buffer, value.position);
+            Type.OPTIONAL_GLOBAL_POSITION.write(buffer, value.position);
             buffer.writeBoolean(value.tracked);
         }
     };
@@ -46,12 +47,12 @@ public final class LodestoneTarget {
     private final GlobalPosition position;
     private final boolean tracked;
 
-    public LodestoneTarget(final GlobalPosition position, final boolean tracked) {
+    public LodestoneTracker(@Nullable final GlobalPosition position, final boolean tracked) {
         this.position = position;
         this.tracked = tracked;
     }
 
-    public GlobalPosition pos() {
+    public @Nullable GlobalPosition pos() {
         return this.position;
     }
 

api/src/main/java/com/viaversion/viaversion/api/minecraft/metadata/types/MetaTypes1_20_5.java

@@ -51,16 +51,17 @@ public final class MetaTypes1_20_5 extends AbstractMetaTypes {
     public final MetaType optionalVarIntType = add(19, Type.OPTIONAL_VAR_INT);
     public final MetaType poseType = add(20, Type.VAR_INT);
     public final MetaType catVariantType = add(21, Type.VAR_INT);
-    public final MetaType frogVariantType = add(22, Type.VAR_INT);
+    public final MetaType wolfVariantType = add(22, Type.VAR_INT);
-    public final MetaType optionalGlobalPosition = add(23, Type.OPTIONAL_GLOBAL_POSITION);
+    public final MetaType frogVariantType = add(23, Type.VAR_INT);
-    public final MetaType paintingVariantType = add(24, Type.VAR_INT);
+    public final MetaType optionalGlobalPosition = add(24, Type.OPTIONAL_GLOBAL_POSITION);
-    public final MetaType snifferState = add(25, Type.VAR_INT);
+    public final MetaType paintingVariantType = add(25, Type.VAR_INT);
-    public final MetaType armadilloState = add(26, Type.VAR_INT);
+    public final MetaType snifferState = add(26, Type.VAR_INT);
-    public final MetaType vectorType = add(27, Type.VECTOR3F);
+    public final MetaType armadilloState = add(27, Type.VAR_INT);
-    public final MetaType quaternionType = add(28, Type.QUATERNION);
+    public final MetaType vectorType = add(28, Type.VECTOR3F);
+    public final MetaType quaternionType = add(29, Type.QUATERNION);
 
     public MetaTypes1_20_5(final ParticleType particleType) {
-        super(29);
+        super(30);
         this.particleType = add(17, particleType);
     }
 }

api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java

@@ -83,7 +83,7 @@ public class ProtocolVersion implements Comparable<ProtocolVersion> {
     public static final ProtocolVersion v1_20 = register(763, "1.20/1.20.1", new SubVersionRange("1.20", 0, 1));
     public static final ProtocolVersion v1_20_2 = register(764, "1.20.2");
     public static final ProtocolVersion v1_20_3 = register(765, "1.20.3/1.20.4", new SubVersionRange("1.20", 3, 4));
-    public static final ProtocolVersion v1_20_5 = register(766, 178, "1.20.5");
+    public static final ProtocolVersion v1_20_5 = register(766, 179, "1.20.5");
     public static final ProtocolVersion unknown = new ProtocolVersion(VersionType.SPECIAL, -1, -1, "UNKNOWN", null);
 
     public static ProtocolVersion register(int version, String name) {

api/src/main/java/com/viaversion/viaversion/api/type/types/item/ItemType1_20_5.java

@@ -45,7 +45,7 @@ public class ItemType1_20_5 extends Type<Item> {
 
     @Override
     public @Nullable Item read(final ByteBuf buffer) throws Exception {
-        final byte amount = buffer.readByte();
+        final int amount = Type.VAR_INT.readPrimitive(buffer);
         if (amount <= 0) {
             return null;
         }
@@ -82,11 +82,11 @@ public class ItemType1_20_5 extends Type<Item> {
     @Override
     public void write(final ByteBuf buffer, @Nullable final Item object) throws Exception {
         if (object == null) {
-            buffer.writeByte(0);
+            Type.VAR_INT.writePrimitive(buffer, 0);
             return;
         }
 
-        buffer.writeByte(object.amount());
+        Type.VAR_INT.writePrimitive(buffer, object.amount());
         Type.VAR_INT.writePrimitive(buffer, object.identifier());
 
         final Map<StructuredDataKey<?>, StructuredData<?>> data = object.structuredData().data();

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/GameProfileType.java

@@ -34,7 +34,7 @@ public final class GameProfileType extends Type<GameProfile> {
 
     @Override
     public GameProfile read(final ByteBuf buffer) throws Exception {
-        final String name = Type.STRING.read(buffer);
+        final String name = Type.OPTIONAL_STRING.read(buffer);
         final java.util.UUID id = Type.OPTIONAL_UUID.read(buffer);
         final int propertyCount = Type.VAR_INT.readPrimitive(buffer);
         final GameProfile.Property[] properties = new GameProfile.Property[propertyCount];
@@ -49,7 +49,7 @@ public final class GameProfileType extends Type<GameProfile> {
 
     @Override
     public void write(final ByteBuf buffer, final GameProfile value) throws Exception {
-        Type.STRING.write(buffer, value.name());
+        Type.OPTIONAL_STRING.write(buffer, value.name());
         Type.OPTIONAL_UUID.write(buffer, value.id());
         Type.VAR_INT.writePrimitive(buffer, value.properties().length);
         for (final GameProfile.Property property : value.properties()) {

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/Protocol1_20_5To1_20_3.java

@@ -33,6 +33,7 @@ import com.viaversion.viaversion.api.type.types.version.Types1_20_5;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
+import com.viaversion.viaversion.protocols.protocol1_19_4to1_19_3.rewriter.CommandRewriter1_19_4;
 import com.viaversion.viaversion.protocols.protocol1_20_2to1_20.packet.ServerboundConfigurationPackets1_20_2;
 import com.viaversion.viaversion.protocols.protocol1_20_3to1_20_2.packet.ClientboundConfigurationPackets1_20_3;
 import com.viaversion.viaversion.protocols.protocol1_20_3to1_20_2.packet.ClientboundPacket1_20_3;
@@ -90,6 +91,8 @@ public final class Protocol1_20_5To1_20_3 extends AbstractProtocol<ClientboundPa
             wrapper.read(Type.BOOLEAN); // Enforces secure chat - moved to join game
         });
 
+        new CommandRewriter1_19_4<>(this).registerDeclareCommands1_19(ClientboundPackets1_20_3.DECLARE_COMMANDS);
+
         cancelServerbound(State.LOGIN, ServerboundLoginPackets.COOKIE_RESPONSE.getId());
         cancelServerbound(ServerboundConfigurationPackets1_20_5.COOKIE_RESPONSE);
         cancelServerbound(ServerboundConfigurationPackets1_20_5.SELECT_KNOWN_PACKS);
@@ -147,7 +150,7 @@ public final class Protocol1_20_5To1_20_3 extends AbstractProtocol<ClientboundPa
             .add(StructuredDataKey.BLOCK_ENTITY_DATA)
             .add(StructuredDataKey.INSTRUMENT)
             .add(StructuredDataKey.RECIPES)
-            .add(StructuredDataKey.LODESTONE_TARGET)
+            .add(StructuredDataKey.LODESTONE_TRACKER)
             .add(StructuredDataKey.FIREWORK_EXPLOSION)
             .add(StructuredDataKey.FIREWORKS)
             .add(StructuredDataKey.PROFILE)

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/rewriter/BlockItemPacketRewriter1_20_5.java

@@ -33,6 +33,7 @@ import com.viaversion.viaversion.api.minecraft.item.DataItem;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.item.StructuredItem;
 import com.viaversion.viaversion.api.minecraft.item.data.BlockStateProperties;
+import com.viaversion.viaversion.api.minecraft.item.data.DyedColor;
 import com.viaversion.viaversion.api.minecraft.item.data.Enchantments;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_20_2;
@@ -48,6 +49,7 @@ import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.Serverb
 import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundPackets1_20_5;
 import com.viaversion.viaversion.rewriter.BlockRewriter;
 import com.viaversion.viaversion.rewriter.ItemRewriter;
+import com.viaversion.viaversion.util.ComponentUtil;
 import com.viaversion.viaversion.util.Key;
 import com.viaversion.viaversion.util.UUIDUtil;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
@@ -192,17 +194,22 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
         return toOldItem(item);
     }
 
+    // TODO Block entity changes
     public Item toOldItem(final Item item) {
-        // Start out with custom data and add the rest on top
+        // Start out with custom data and add the rest on top, or short-curcuit with the original item
         final StructuredDataContainer data = item.structuredData();
         data.setIdLookup(protocol, true);
 
         final StructuredData<CompoundTag> customData = data.getNonEmpty(StructuredDataKey.CUSTOM_DATA);
         final CompoundTag tag = customData != null ? customData.value() : new CompoundTag();
+        final DataItem dataItem = new DataItem(item.identifier(), (byte) item.amount(), (short) 0, tag);
+        if (customData != null && tag.remove(tagMarker) != null) {
+            return dataItem;
+        }
 
         // TODO
 
-        return new DataItem(item.identifier(), (byte) item.amount(), (short) 0, tag);
+        return dataItem;
     }
 
     public Item toStructuredItem(final Item old) {
@@ -215,21 +222,27 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
         }
 
         // Rewrite nbt to new data structures
-        updateDisplay(data, tag.getCompoundTag("display"));
+        final NumberTag hideFlags = tag.getNumberTag("HideFlags");
+        final int hideFlagsValue = hideFlags != null ? hideFlags.asInt() : 0;
+        if ((hideFlagsValue & 0x20) != 0) {
+            data.set(StructuredDataKey.HIDE_ADDITIONAL_TOOLTIP);
+        }
+
+        updateDisplay(data, tag.getCompoundTag("display"), hideFlagsValue);
 
         final NumberTag damage = tag.getNumberTag("Damage");
         if (damage != null && damage.asInt() != 0) {
-            data.add(StructuredDataKey.DAMAGE, damage.asInt());
+            data.set(StructuredDataKey.DAMAGE, damage.asInt());
         }
 
         final NumberTag repairCost = tag.getNumberTag("RepairCost");
         if (repairCost != null && repairCost.asInt() != 0) {
-            data.add(StructuredDataKey.REPAIR_COST, repairCost.asInt());
+            data.set(StructuredDataKey.REPAIR_COST, repairCost.asInt());
         }
 
         final NumberTag customModelData = tag.getNumberTag("CustomModelData");
         if (customModelData != null) {
-            data.add(StructuredDataKey.CUSTOM_MODEL_DATA, customModelData.asInt());
+            data.set(StructuredDataKey.CUSTOM_MODEL_DATA, customModelData.asInt());
         }
 
         final CompoundTag blockState = tag.getCompoundTag("BlockStateTag");
@@ -240,12 +253,13 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
                     properties.put(entry.getKey(), ((StringTag) entry.getValue()).getValue());
                 }
             }
-            data.add(StructuredDataKey.BLOCK_STATE, new BlockStateProperties(properties));
+            // TODO block state changes
+            data.set(StructuredDataKey.BLOCK_STATE, new BlockStateProperties(properties));
         }
 
         final CompoundTag entityTag = tag.getCompoundTag("EntityTag");
         if (entityTag != null) {
-            data.add(StructuredDataKey.ENTITY_DATA, entityTag);
+            data.set(StructuredDataKey.ENTITY_DATA, entityTag);
         }
 
         final CompoundTag blockEntityTag = tag.getCompoundTag("BlockEntityTag");
@@ -254,24 +268,40 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             // item.structuredData().add(protocol, "block_entity_data", Type.COMPOUND_TAG, blockEntityTag);
         }
 
-        final NumberTag hideFlags = tag.getNumberTag("HideFlags");
-        final int hideFlagsValue = hideFlags != null ? hideFlags.asInt() : 0;
-
         final NumberTag unbreakable = tag.getNumberTag("Unbreakable");
         if (unbreakable != null && unbreakable.asBoolean()) {
             if ((hideFlagsValue & 0x04) != 0) {
-                data.add(StructuredDataKey.UNBREAKABLE, true); // TODO Value is hide, should have a wrapper
+                data.set(StructuredDataKey.UNBREAKABLE, true); // TODO Value is hide, should have a wrapper
             } else {
                 data.addEmpty(StructuredDataKey.UNBREAKABLE);
             }
         }
 
+        final CompoundTag trimTag = tag.getCompoundTag("Trim");
+        if (trimTag != null) {
+            // TODO
+            //final ArmorTrim armorTrim = new ArmorTrim(, , (hideFlagsValue & 0x80) == 0);
+            //data.set(StructuredDataKey.TRIM, armorTrim);
+        }
+
+        final ListTag chargedProjectiles = tag.getListTag("ChargedProjectiles");
+        if (chargedProjectiles != null) {
+            final List<Item> items = new ArrayList<>();
+            for (final Tag chargedProjectile : chargedProjectiles) {
+                if (!(chargedProjectile instanceof CompoundTag)) {
+                    continue;
+                }
+                items.add(itemFromTag((CompoundTag) chargedProjectile));
+            }
+            data.set(StructuredDataKey.CHARGED_PROJECTILES, items.toArray(new Item[0]));
+        }
+
         updateEnchantments(data, tag, "Enchantments", StructuredDataKey.ENCHANTMENTS, (hideFlagsValue & 0x01) == 0);
         updateEnchantments(data, tag, "StoredEnchantments", StructuredDataKey.STORED_ENCHANTMENTS, (hideFlagsValue & 0x20) == 0);
 
         final NumberTag map = tag.getNumberTag("map");
         if (map != null) {
-            data.add(StructuredDataKey.MAP_ID, map.asInt());
+            data.set(StructuredDataKey.MAP_ID, map.asInt());
         }
 
         updateMapDecorations(data, tag.getListTag("Decorations", CompoundTag.class));
@@ -281,13 +311,9 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
         updateProfile(data, tag.get("SkullOwner"));
 
         // TODO
-        //  StructuredDataKey.CUSTOM_NAME
-        //  StructuredDataKey.LORE
         //  StructuredDataKey.CAN_PLACE_ON
         //  StructuredDataKey.CAN_BREAK
         //  StructuredDataKey.ATTRIBUTE_MODIFIERS
-        //  StructuredDataKey.HIDE_ADDITIONAL_TOOLTIP
-        //  StructuredDataKey.REPAIR_COST
         //  StructuredDataKey.CREATIVE_SLOT_LOCK
         //  StructuredDataKey.INTANGIBLE_PROJECTILE
         //  StructuredDataKey.DYED_COLOR
@@ -317,10 +343,17 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
 
         // Add the original as custom data, to be re-used for creative clients as well
         tag.putBoolean(nbtTagName(), true);
-        data.add(StructuredDataKey.CUSTOM_DATA, tag);
+        data.set(StructuredDataKey.CUSTOM_DATA, tag);
         return item;
     }
 
+    private Item itemFromTag(final CompoundTag item) {
+        final StringTag id = item.getStringTag("id");
+        final NumberTag count = item.getNumberTag("Count");
+        final CompoundTag tag = item.getCompoundTag("tag");
+        return handleItemToClient(new DataItem(0, count.asByte(), (short) 0, tag)); // TODO unmapped id from key
+    }
+
     private void updateEnchantments(final StructuredDataContainer data, final CompoundTag tag, final String key,
                                     final StructuredDataKey<Enchantments> newKey, final boolean show) {
         final ListTag<CompoundTag> enchantmentsTag = tag.getListTag(key, CompoundTag.class);
@@ -346,11 +379,11 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             enchantments.enchantments().put(intId, lvl.asInt());
         }
 
-        data.add(newKey, enchantments);
+        data.set(newKey, enchantments);
 
         // Add glint if none of the enchantments were valid
         if (enchantments.size() == 0 && !enchantmentsTag.isEmpty()) {
-            data.add(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE, true);
+            data.set(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE, true);
         }
     }
 
@@ -397,7 +430,7 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             return;
         }
 
-        data.add(StructuredDataKey.PROFILE, new GameProfile(name, uuid, properties.toArray(new GameProfile.Property[0])));
+        data.set(StructuredDataKey.PROFILE, new GameProfile(name, uuid, properties.toArray(new GameProfile.Property[0])));
     }
 
     private void updateMapDecorations(final StructuredDataContainer data, final ListTag<CompoundTag> decorationsTag) {
@@ -423,18 +456,38 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             updatedDecorationsTag.put(id, updatedDecorationTag);
         }
 
-        data.add(StructuredDataKey.MAP_DECORATIONS, updatedDecorationsTag);
+        data.set(StructuredDataKey.MAP_DECORATIONS, updatedDecorationsTag);
     }
 
-    private void updateDisplay(final StructuredDataContainer data, final CompoundTag displayTag) {
+    private void updateDisplay(final StructuredDataContainer data, final CompoundTag displayTag, final int hideFlags) {
         if (displayTag == null) {
             return;
         }
 
         final NumberTag mapColorTag = displayTag.getNumberTag("MapColor");
         if (mapColorTag != null) {
-            data.add(StructuredDataKey.MAP_COLOR, mapColorTag.asInt());
+            data.set(StructuredDataKey.MAP_COLOR, mapColorTag.asInt());
+        }
+
+        final StringTag nameTag = displayTag.getStringTag("Name");
+        if (nameTag != null) {
+            data.set(StructuredDataKey.CUSTOM_NAME, ComponentUtil.jsonStringToTag(nameTag.getValue()));
+        }
+
+        final ListTag loreTag = displayTag.getListTag("Lore");
+        if (loreTag != null) {
+            final List<Tag> updatedLore = new ArrayList<>();
+            for (final Tag loreEntry : loreTag) {
+                if (loreEntry instanceof StringTag) {
+                    updatedLore.add(ComponentUtil.jsonStringToTag(((StringTag) loreEntry).getValue()));
+                }
+            }
+            data.set(StructuredDataKey.LORE, updatedLore.toArray(new Tag[0]));
+        }
+
+        final NumberTag colorTag = displayTag.getNumberTag("color");
+        if (colorTag != null) {
+            data.set(StructuredDataKey.DYED_COLOR, new DyedColor(colorTag.asInt(), (hideFlags & 0x40) == 0));
         }
-        // TODO other display values
     }
 }

common/src/main/java/com/viaversion/viaversion/util/ComponentUtil.java

@@ -92,6 +92,30 @@ public final class ComponentUtil {
         });
     }
 
+    public static @Nullable String tagToJsonString(@Nullable final Tag tag) {
+        try {
+            final ATextComponent component = TextComponentCodec.V1_20_3.deserializeNbtTree(tag);
+            return component != null ? SerializerVersion.V1_20_3.jsonSerializer.serialize(component) : null;
+        } catch (final Exception e) {
+            Via.getPlatform().getLogger().log(Level.SEVERE, "Error converting tag: " + tag, e);
+            return plainToJson("<error>").toString();
+        }
+    }
+
+    public static @Nullable Tag jsonStringToTag(@Nullable final String json) {
+        if (json == null) {
+            return null;
+        }
+
+        try {
+            final ATextComponent component = TextComponentSerializer.V1_20_3.deserialize(json);
+            return TextComponentCodec.V1_20_3.serializeNbt(component);
+        } catch (final Exception e) {
+            Via.getPlatform().getLogger().log(Level.SEVERE, "Error converting component: " + json, e);
+            return new StringTag("<error>");
+        }
+    }
+
     public static @Nullable JsonElement convertJson(@Nullable final JsonElement element, final SerializerVersion from, final SerializerVersion to) {
         return element != null ? convert(from, to, from.jsonSerializer.deserialize(element)) : null;
     }

gradle.properties

@@ -1,5 +1,5 @@
 # Project properties - we put these here so they can be modified without causing a recompile of the build scripts
-projectVersion=4.10.0-24w09a-SNAPSHOT
+projectVersion=4.10.0-24w10a-SNAPSHOT
 
 # Smile emoji
 mcVersions=1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16, 1.15.2, 1.15.1, 1.15, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14, 1.13.2, 1.13.1, 1.13, 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11, 1.10.2, 1.10.1, 1.10, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9, 1.8.9