Add item fixes to component rewriter in 1.21.x protocols as well (#4217)

Adds the rarity fix in 1.20.5->1.21 and the item/custom name fix in 1.21->1.21.2 to the component rewriters / chat items.

common/src/main/java/com/viaversion/viaversion/protocols/v1_20_5to1_21/rewriter/ComponentRewriter1_21.java

@@ -19,10 +19,12 @@ package com.viaversion.viaversion.protocols.v1_20_5to1_21.rewriter;
 
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPacket1_20_5;
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.Protocol1_20_5To1_21;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.util.Key;
 import com.viaversion.viaversion.util.SerializerVersion;
 import com.viaversion.viaversion.util.TagUtil;
 import com.viaversion.viaversion.util.UUIDUtil;
@@ -34,8 +36,24 @@ public final class ComponentRewriter1_21 extends ComponentRewriter<ClientboundPa
         super(protocol, ReadType.NBT);
     }
 
-    private void convertAttributeModifiersComponent(final CompoundTag tag) {
+    @Override
-        final CompoundTag attributeModifiers = TagUtil.getNamespacedCompoundTag(tag, "minecraft:attribute_modifiers");
+    protected void handleShowItem(final UserConnection connection, final CompoundTag itemTag, CompoundTag componentsTag) {
+        super.handleShowItem(connection, itemTag, componentsTag);
+        final String identifier = Key.stripMinecraftNamespace(itemTag.getString("id"));
+        if (identifier.equals("trident") || identifier.equals("piglin_banner_pattern")) {
+            if (componentsTag == null) {
+                itemTag.put("components", componentsTag = new CompoundTag());
+            }
+            if (!TagUtil.containsNamespaced(componentsTag, "rarity")) {
+                componentsTag.put("minecraft:rarity", new StringTag("common"));
+            }
+        }
+
+        if (componentsTag == null) {
+            return;
+        }
+
+        final CompoundTag attributeModifiers = TagUtil.getNamespacedCompoundTag(componentsTag, "attribute_modifiers");
         if (attributeModifiers == null) {
             return;
         }
@@ -48,14 +66,6 @@ public final class ComponentRewriter1_21 extends ComponentRewriter<ClientboundPa
         }
     }
 
-    @Override
-    protected void handleShowItem(final UserConnection connection, final CompoundTag itemTag, final CompoundTag componentsTag) {
-        super.handleShowItem(connection, itemTag, componentsTag);
-        if (componentsTag != null) {
-            convertAttributeModifiersComponent(componentsTag);
-        }
-    }
-
     @Override
     protected SerializerVersion inputSerializerVersion() {
         return SerializerVersion.V1_20_5;

common/src/main/java/com/viaversion/viaversion/protocols/v1_21to1_21_2/rewriter/ComponentRewriter1_21_2.java

@@ -20,6 +20,7 @@ package com.viaversion.viaversion.protocols.v1_21to1_21_2.rewriter;
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.ListTag;
 import com.viaversion.nbt.tag.StringTag;
+import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.data.FullMappings;
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPacket1_21;
@@ -27,6 +28,7 @@ import com.viaversion.viaversion.protocols.v1_21to1_21_2.Protocol1_21To1_21_2;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
 import com.viaversion.viaversion.util.SerializerVersion;
 import com.viaversion.viaversion.util.TagUtil;
+import java.util.Collections;
 import java.util.Iterator;
 
 public final class ComponentRewriter1_21_2 extends ComponentRewriter<ClientboundPacket1_21> {
@@ -62,6 +64,26 @@ public final class ComponentRewriter1_21_2 extends ComponentRewriter<Clientbound
 
         TagUtil.removeNamespaced(componentsTag, "fire_resistant");
         TagUtil.removeNamespaced(componentsTag, "lock");
+
+        final StringTag customName = TagUtil.getNamespacedStringTag(componentsTag, "custom_name");
+        final StringTag itemName = TagUtil.getNamespacedStringTag(componentsTag, "item_name");
+        if (customName != null || itemName == null) {
+            return;
+        }
+
+        final int identifier = protocol.getMappingData().getFullItemMappings().mappedId(itemTag.getString("id"));
+        if (identifier == 952 || identifier == 1147 || identifier == 1039 || identifier == 1203 || identifier == 1200 || identifier == 1204 || identifier == 1202) {
+            final var input = inputSerializerVersion();
+            final var output = outputSerializerVersion();
+
+            final CompoundTag name = new CompoundTag();
+            name.putBoolean("italic", false);
+            name.putString("text", "");
+            final Tag nameTag = input.toTag(input.toComponent(itemName.getValue()));
+            name.put("extra", new ListTag<>(Collections.singletonList(nameTag)));
+
+            componentsTag.put("minecraft:custom_name", new StringTag(output.toString(output.toComponent(name))));
+        }
     }
 
     public static void convertAttributes(final CompoundTag componentsTag, final FullMappings mappings) {

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

@@ -60,6 +60,10 @@ public final class TagUtil {
         return tag.remove(Key.namespaced(key)) != null || tag.remove(Key.stripMinecraftNamespace(key)) != null;
     }
 
+    public static boolean containsNamespaced(final CompoundTag tag, final String key) {
+        return tag.contains(Key.namespaced(key)) || tag.contains(Key.stripMinecraftNamespace(key));
+    }
+
     public static @Nullable CompoundTag getNamespacedCompoundTag(final CompoundTag tag, final String key) {
         final CompoundTag compoundTag = tag.getCompoundTag(Key.namespaced(key));
         return compoundTag != null ? compoundTag : tag.getCompoundTag(Key.stripMinecraftNamespace(key));