Little more work

core/src/main/java/org/geysermc/geyser/inventory/AnvilContainer.java

@@ -29,6 +29,7 @@ import com.github.steveice10.mc.protocol.data.game.inventory.ContainerType;
 import com.github.steveice10.mc.protocol.packet.ingame.serverbound.inventory.ServerboundRenameItemPacket;
 import lombok.Getter;
 import lombok.Setter;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.translator.text.MessageTranslator;
@@ -72,7 +73,7 @@ public class AnvilContainer extends Container {
         String correctRename;
         newName = rename;
 
-        String originalName = ItemUtils.getCustomName(getInput().getNbt());
+        Component originalName = ItemUtils.getCustomName(getInput().getComponents());
 
         String plainOriginalName = MessageTranslator.convertToPlainTextLenient(originalName, session.locale());
         String plainNewName = MessageTranslator.convertToPlainText(rename);

core/src/main/java/org/geysermc/geyser/inventory/GeyserItemStack.java

@@ -26,6 +26,7 @@
 package org.geysermc.geyser.inventory;
 
 import com.github.steveice10.mc.protocol.data.game.item.ItemStack;
+import com.github.steveice10.mc.protocol.data.game.item.component.DataComponentType;
 import com.github.steveice10.mc.protocol.data.game.item.component.DataComponents;
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import lombok.AccessLevel;
@@ -87,6 +88,30 @@ public class GeyserItemStack {
         return isEmpty() ? null : components;
     }
 
+    public <T extends Boolean> boolean getComponent(DataComponentType<T> type, boolean def) {
+        if (components == null) {
+            return def;
+        }
+
+        Boolean result = components.get(type);
+        if (result != null) {
+            return result;
+        }
+        return def;
+    }
+
+    public <T extends Integer> int getComponent(DataComponentType<T> type, int def) {
+        if (components == null) {
+            return def;
+        }
+
+        Integer result = components.get(type);
+        if (result != null) {
+            return result;
+        }
+        return def;
+    }
+
     public int getNetId() {
         return isEmpty() ? 0 : netId;
     }

core/src/main/java/org/geysermc/geyser/inventory/updater/AnvilInventoryUpdater.java

@@ -26,6 +26,7 @@
 package org.geysermc.geyser.inventory.updater;
 
 import com.github.steveice10.mc.protocol.data.game.entity.player.GameMode;
+import com.github.steveice10.mc.protocol.data.game.item.component.DataComponentType;
 import com.github.steveice10.mc.protocol.packet.ingame.serverbound.inventory.ServerboundRenameItemPacket;
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.ListTag;
@@ -34,6 +35,7 @@ import com.github.steveice10.opennbt.tag.builtin.Tag;
 import it.unimi.dsi.fastutil.objects.Object2IntMap;
 import it.unimi.dsi.fastutil.objects.Object2IntMaps;
 import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
+import net.kyori.adventure.text.Component;
 import org.cloudburstmc.nbt.NbtMap;
 import org.cloudburstmc.nbt.NbtMapBuilder;
 import org.cloudburstmc.protocol.bedrock.data.inventory.ContainerId;
@@ -118,7 +120,8 @@ public class AnvilInventoryUpdater extends InventoryUpdater {
 
             // Changing the item in the input slot resets the name field on Bedrock, but
             // does not result in a FilterTextPacket
-            String originalName = MessageTranslator.convertToPlainTextLenient(ItemUtils.getCustomName(input.getNbt()), session.locale());
+            // TODO test
+            String originalName = MessageTranslator.convertToPlainText(ItemUtils.getCustomName(input.getComponents()));
             ServerboundRenameItemPacket renameItemPacket = new ServerboundRenameItemPacket(originalName);
             session.sendDownstreamGamePacket(renameItemPacket);
 
@@ -424,38 +427,27 @@ public class AnvilInventoryUpdater extends InventoryUpdater {
         }
         // This should really check the name field in all cases, but that requires the localized name
         // of the item which can change depending on NBT and Minecraft Edition
-        String originalName = ItemUtils.getCustomName(anvilContainer.getInput().getNbt());
+        Component originalName = ItemUtils.getCustomName(anvilContainer.getInput().getComponents());
         if (bedrock && originalName != null && anvilContainer.getNewName() != null) {
             // Check text and formatting
-            String legacyOriginalName = MessageTranslator.convertMessageLenient(originalName, session.locale());
+            String legacyOriginalName = MessageTranslator.convertMessage(originalName, session.locale());
             return !legacyOriginalName.equals(anvilContainer.getNewName());
         }
-        return !Objects.equals(originalName, ItemUtils.getCustomName(anvilContainer.getResult().getNbt()));
+        return !Objects.equals(originalName, ItemUtils.getCustomName(anvilContainer.getResult().getComponents()));
-    }
-
-    @SuppressWarnings("SameParameterValue")
-    private int getTagIntValueOr(GeyserItemStack itemStack, String tagName, int defaultValue) {
-        if (itemStack.getNbt() != null) {
-            Tag tag = itemStack.getNbt().get(tagName);
-            if (tag != null && tag.getValue() instanceof Number value) {
-                return value.intValue();
-            }
-        }
-        return defaultValue;
     }
 
     private int getRepairCost(GeyserItemStack itemStack) {
-        return getTagIntValueOr(itemStack, "RepairCost", 0);
+        return itemStack.getComponent(DataComponentType.REPAIR_COST, 0);
     }
 
     private boolean hasDurability(GeyserItemStack itemStack) {
         if (itemStack.asItem().maxDamage() > 0) {
-            return getTagIntValueOr(itemStack, "Unbreakable", 0) == 0;
+            return itemStack.getComponent(DataComponentType.UNBREAKABLE, false);
         }
         return false;
     }
 
     private int getDamage(GeyserItemStack itemStack) {
-        return getTagIntValueOr(itemStack, "Damage", 0);
+        return itemStack.getComponent(DataComponentType.DAMAGE, 0);
     }
 }

core/src/main/java/org/geysermc/geyser/translator/text/MessageTranslator.java

@@ -245,6 +245,16 @@ public class MessageTranslator {
         return GSON_SERIALIZER.serialize(component);
     }
 
+    /**
+     * Convert legacy format message to plain text
+     *
+     * @param message Message to convert
+     * @return The plain text of the message
+     */
+    public static String convertToPlainText(Component message) {
+        return PlainTextComponentSerializer.plainText().serialize(message);
+    }
+
     /**
      * Convert legacy format message to plain text
      *

core/src/main/java/org/geysermc/geyser/util/InventoryUtils.java

@@ -180,7 +180,7 @@ public class InventoryUtils {
     public static boolean canStack(GeyserItemStack item1, GeyserItemStack item2) {
         if (item1.isEmpty() || item2.isEmpty())
             return false;
-        return item1.getJavaId() == item2.getJavaId() && Objects.equals(item1.getNbt(), item2.getNbt());
+        return item1.getJavaId() == item2.getJavaId() && Objects.equals(item1.getComponents(), item2.getComponents());
     }
 
     /**

core/src/main/java/org/geysermc/geyser/util/ItemUtils.java

@@ -25,10 +25,13 @@
 
 package org.geysermc.geyser.util;
 
+import com.github.steveice10.mc.protocol.data.game.item.component.DataComponentType;
+import com.github.steveice10.mc.protocol.data.game.item.component.DataComponents;
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.ListTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import com.github.steveice10.opennbt.tag.builtin.Tag;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.item.Items;
 import org.geysermc.geyser.item.type.FishingRodItem;
@@ -70,17 +73,13 @@ public class ItemUtils {
     }
 
     /**
-     * @param itemTag the NBT tag of the item
+     * @param components the data components of the item
      * @return the custom name of the item
      */
-    public static @Nullable String getCustomName(CompoundTag itemTag) {
+    public static @Nullable Component getCustomName(DataComponents components) {
-        if (itemTag != null) {
+        if (components == null) {
-            if (itemTag.get("display") instanceof CompoundTag displayTag) {
+            return null;
-                if (displayTag.get("Name") instanceof StringTag nameTag) {
-                    return nameTag.getValue();
-                }
-            }
         }
-        return null;
+        return components.get(DataComponentType.CUSTOM_NAME);
     }
 }