Handle rarity changes in trident/banner pattern item in 1.21->1.20.5 (#813)

Author: FlorianMichael

common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/rewriter/BlockItemPacketRewriter1_21.java

@@ -17,12 +17,12 @@
  */
 package com.viaversion.viabackwards.protocol.v1_21to1_20_5.rewriter;
 
+import com.viaversion.nbt.tag.ByteTag;
 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.viabackwards.api.rewriters.BackwardsStructuredItemRewriter;
-import com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter;
 import com.viaversion.viabackwards.api.rewriters.StructuredEnchantmentRewriter;
 import com.viaversion.viabackwards.protocol.v1_21to1_20_5.Protocol1_21To1_20_5;
 import com.viaversion.viabackwards.protocol.v1_21to1_20_5.storage.EnchantmentsPaintingsStorage;
@@ -53,6 +53,8 @@
 import static com.viaversion.viaversion.protocols.v1_20_5to1_21.rewriter.BlockItemPacketRewriter1_21.downgradeItemData;
 import static com.viaversion.viaversion.protocols.v1_20_5to1_21.rewriter.BlockItemPacketRewriter1_21.updateItemData;
 
+import static com.viaversion.viaversion.protocols.v1_20_5to1_21.rewriter.BlockItemPacketRewriter1_21.resetRarityValues;
+
 import static com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter.ENCHANTMENT_LEVEL_TRANSLATION;
 
 public final class BlockItemPacketRewriter1_21 extends BackwardsStructuredItemRewriter<ClientboundPacket1_21, ServerboundPacket1_20_5, Protocol1_21To1_20_5> {
@@ -153,9 +155,23 @@ public Item handleItemToClient(final UserConnection connection, final Item item)
         enchantmentRewriter.rewriteEnchantmentsToClient(data, StructuredDataKey.ENCHANTMENTS, idRewriteFunction, descriptionSupplier, false);
         enchantmentRewriter.rewriteEnchantmentsToClient(data, StructuredDataKey.STORED_ENCHANTMENTS, idRewriteFunction, descriptionSupplier, true);
 
+        final int identifier = item.identifier();
+
         // Order is important
         super.handleItemToClient(connection, item);
         downgradeItemData(item);
+
+        final StructuredDataContainer dataContainer = item.dataContainer();
+        if (dataContainer.contains(StructuredDataKey.RARITY)) {
+            return item;
+        }
+
+        // Change rarity of trident and piglin banner pattern
+        final boolean trident = identifier == 1188;
+        if (trident || identifier == 1200) {
+            dataContainer.set(StructuredDataKey.RARITY, trident ? 3 : 1); // Epic or Uncommon
+            saveTag(createCustomTag(item), new ByteTag(true), "rarity");
+        }
         return item;
     }
 
@@ -179,6 +195,7 @@ public Item handleItemToServer(final UserConnection connection, final Item item)
         // Order is important
         super.handleItemToServer(connection, item);
         updateItemData(item);
+        resetRarityValues(item, nbtTagName("rarity"));
         return item;
     }
 

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ metadata.format.version = "1.1"
 [versions]
 
 # ViaVersion
-viaver = "5.0.1-SNAPSHOT"
+viaver = "5.0.2-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"