From 1f3555df4a8907f73907ff6f61198681af5b8219 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Sat, 27 Jan 2024 21:04:32 +0100
Subject: [PATCH] Put books through component conversion in 1.20.3->1.20.2

---
 .../BlockItemPacketRewriter1_20_3.java        | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/rewriter/BlockItemPacketRewriter1_20_3.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/rewriter/BlockItemPacketRewriter1_20_3.java
index 98d1f5d1..4960d98d 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/rewriter/BlockItemPacketRewriter1_20_3.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/rewriter/BlockItemPacketRewriter1_20_3.java
@@ -21,15 +21,23 @@ import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.rewriters.ItemRewriter;
 import com.viaversion.viabackwards.protocol.protocol1_20_2to1_20_3.Protocol1_20_2To1_20_3;
 import com.viaversion.viaversion.api.data.ParticleMappings;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_20_2;
 import com.viaversion.viaversion.api.type.types.version.Types1_20_3;
+import com.viaversion.viaversion.libs.gson.JsonElement;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.ListTag;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.StringTag;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.Tag;
 import com.viaversion.viaversion.protocols.protocol1_20_2to1_20.packet.ServerboundPackets1_20_2;
 import com.viaversion.viaversion.protocols.protocol1_20_3to1_20_2.packet.ClientboundPackets1_20_3;
 import com.viaversion.viaversion.protocols.protocol1_20_3to1_20_2.rewriter.RecipeRewriter1_20_3;
 import com.viaversion.viaversion.rewriter.BlockRewriter;
+import com.viaversion.viaversion.util.ComponentUtil;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public final class BlockItemPacketRewriter1_20_3 extends ItemRewriter<ClientboundPackets1_20_3, ServerboundPackets1_20_2, Protocol1_20_2To1_20_3> {
 
@@ -155,4 +163,33 @@ public final class BlockItemPacketRewriter1_20_3 extends ItemRewriter<Clientboun
             wrapper.read(Type.OPTIONAL_FLOAT); // Sound range
         });
     }
+
+    @Override
+    public @Nullable Item handleItemToClient(@Nullable final Item item) {
+        if (item == null) return null;
+
+        final CompoundTag tag = item.tag();
+        if (tag != null) {
+            updatePages(tag, "pages");
+            updatePages(tag, "filtered_pages");
+        }
+        return super.handleItemToClient(item);
+    }
+
+    private void updatePages(final CompoundTag tag, final String key) {
+        if (!(tag.get(key) instanceof ListTag)) {
+            return;
+        }
+
+        final ListTag pages = tag.get(key);
+        for (final Tag pageTag : pages) {
+            if (!(pageTag instanceof StringTag)) {
+                continue;
+            }
+
+            final StringTag stringTag = (StringTag) pageTag;
+            final JsonElement updatedComponent = ComponentUtil.convertJson(stringTag.getValue(), ComponentUtil.SerializerVersion.V1_20_3, ComponentUtil.SerializerVersion.V1_19_4);
+            stringTag.setValue(updatedComponent.toString());
+        }
+    }
 }
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