Add a few structured data -> nbt converters

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/data/Enchantments1_20_3.java

@@ -64,11 +64,11 @@ public final class Enchantments1_20_3 {
         "vanishing_curse"
     );
 
-    public static @Nullable String enchantment(final int id) {
+    public static @Nullable String idToKey(final int id) {
         return ENCHANTMENTS.idToKey(id);
     }
 
-    public static int id(final String enchantment) {
+    public static int keyToId(final String enchantment) {
         return ENCHANTMENTS.keyToId(enchantment);
     }
 }

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

@@ -416,8 +416,8 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             final String name = modifierTag.getString("Name");
             final NumberTag amountTag = modifierTag.getNumberTag("Amount");
             final IntArrayTag uuidTag = modifierTag.getIntArrayTag("UUID");
-            final NumberTag slotTag = modifierTag.getNumberTag("Slot");
+            final int slot = modifierTag.getInt("Slot");
-            if (name == null || attributeName == null || amountTag == null || uuidTag == null || slotTag == null) {
+            if (name == null || attributeName == null || amountTag == null || uuidTag == null) {
                 return null;
             }
 
@@ -439,7 +439,7 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
                     amountTag.asDouble(),
                     operationId
                 ),
-                slotTag.asInt()
+                slot
             );
         }).filter(Objects::nonNull).toArray(AttributeModifier[]::new);
         data.set(StructuredDataKey.ATTRIBUTE_MODIFIERS, new AttributeModifiers(modifiers, showInTooltip));
@@ -699,7 +699,7 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
                 continue;
             }
 
-            final int intId = Enchantments1_20_3.id(id);
+            final int intId = Enchantments1_20_3.keyToId(id);
             if (intId == -1) {
                 continue;
             }

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

@@ -18,9 +18,17 @@
 package com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.rewriter;
 
 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 com.viaversion.viaversion.api.minecraft.data.StructuredData;
 import com.viaversion.viaversion.api.minecraft.data.StructuredDataKey;
+import com.viaversion.viaversion.api.minecraft.item.data.AttributeModifier;
+import com.viaversion.viaversion.api.minecraft.item.data.Enchantments;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.data.Attributes1_20_3;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.data.Enchantments1_20_3;
 import com.viaversion.viaversion.util.ComponentUtil;
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
 import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
 import java.util.Map;
 
@@ -29,8 +37,75 @@ final class StructuredDataConverter {
     private static final Map<StructuredDataKey<?>, Rewriter<?>> REWRITERS = new Reference2ObjectOpenHashMap<>();
 
     static {
-        // TODO
+        register(StructuredDataKey.DAMAGE, (data, tag) -> tag.putInt("Damage", data));
-        register(StructuredDataKey.CUSTOM_NAME, (data, tag) -> tag.putString("CustomName", ComponentUtil.tagToJsonString(data.value())));
+        register(StructuredDataKey.UNBREAKABLE, (data, tag) -> {
+            tag.putBoolean("Unbreakable", true);
+            if (!data.showInTooltip()) {
+                putHideFlag(tag, 0x04);
+            }
+        });
+        register(StructuredDataKey.CUSTOM_NAME, (data, tag) -> tag.putString("CustomName", ComponentUtil.tagToJsonString(data)));
+        register(StructuredDataKey.LORE, (data, tag) -> {
+            final ListTag<StringTag> lore = new ListTag<>(StringTag.class);
+            for (final Tag loreEntry : data) {
+                lore.add(new StringTag(ComponentUtil.tagToJsonString(loreEntry)));
+            }
+            tag.put("Lore", lore);
+        });
+        register(StructuredDataKey.ENCHANTMENTS, StructuredDataConverter::convertEnchantments);
+        register(StructuredDataKey.STORED_ENCHANTMENTS, StructuredDataConverter::convertEnchantments);
+        //register(StructuredDataKey.CAN_PLACE_ON, (data, tag) -> ); // TODO
+        //register(StructuredDataKey.CAN_BREAK, (data, tag) -> ); // TODO
+        register(StructuredDataKey.ATTRIBUTE_MODIFIERS, (data, tag) -> {
+            final ListTag<CompoundTag> modifiers = new ListTag<>(CompoundTag.class);
+            for (final AttributeModifier modifier : data.modifiers()) {
+                final String identifier = Attributes1_20_3.idToKey(modifier.attribute());
+                if (identifier == null) {
+                    continue;
+                }
+
+                final CompoundTag modifierTag = new CompoundTag();
+                modifierTag.putString("AttributeName", identifier);
+                modifierTag.putString("Name", modifier.modifier().name());
+                modifierTag.putDouble("Amount", modifier.modifier().amount());
+                modifierTag.putInt("Slot", modifier.slot());
+                modifierTag.putInt("Operation", modifier.modifier().operation());
+                modifiers.add(modifierTag);
+            }
+            tag.put("AttributeModifiers", modifiers);
+
+            if (!data.showInTooltip()) {
+                putHideFlag(tag, 0x02);
+            }
+        });
+        register(StructuredDataKey.CUSTOM_MODEL_DATA, (data, tag) -> tag.putInt("CustomModelData", data));
+        register(StructuredDataKey.HIDE_ADDITIONAL_TOOLTIP, (data, tag) -> putHideFlag(tag, 0x20));
+        register(StructuredDataKey.REPAIR_COST, (data, tag) -> tag.putInt("RepairCost", data));
+
+    }
+
+    private static void convertEnchantments(final Enchantments data, final CompoundTag tag) {
+        final ListTag<CompoundTag> enchantments = new ListTag<>(CompoundTag.class);
+        for (final Int2IntMap.Entry entry : data.enchantments().int2IntEntrySet()) {
+            final String identifier = Enchantments1_20_3.idToKey(entry.getIntKey());
+            if (identifier == null) {
+                continue;
+            }
+
+            final CompoundTag enchantment = new CompoundTag();
+            enchantment.putString("id", identifier);
+            enchantment.putShort("lvl", (short) entry.getIntKey());
+            enchantments.add(enchantment);
+        }
+        tag.put("Enchantments", enchantments);
+
+        if (!data.showInTooltip()) {
+            putHideFlag(tag, 0x01);
+        }
+    }
+
+    private static void putHideFlag(final CompoundTag tag, final int value) {
+        tag.putInt("HideFlags", tag.getInt("HideFlags") | value);
     }
 
     public static <T> void rewrite(final StructuredData<T> data, final CompoundTag tag) {
@@ -41,7 +116,7 @@ final class StructuredDataConverter {
         //noinspection unchecked
         final Rewriter<T> rewriter = (Rewriter<T>) REWRITERS.get(data.key());
         if (rewriter != null) {
-            rewriter.rewrite(data, tag);
+            rewriter.rewrite(data.value(), tag);
         }
     }
 
@@ -52,6 +127,6 @@ final class StructuredDataConverter {
     @FunctionalInterface
     interface Rewriter<T> {
 
-        void rewrite(StructuredData<T> data, CompoundTag tag);
+        void rewrite(T data, CompoundTag tag);
     }
 }