Merge rewriter and packet classes (entities and items) in 1.8->1.9

common/src/main/java/com/viaversion/viaversion/protocols/v1_10to1_11/Protocol1_10To1_11.java

@@ -33,7 +33,7 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_3;
 import com.viaversion.viaversion.api.type.types.version.Types1_9;
 import com.viaversion.viaversion.protocols.v1_10to1_11.data.PotionColorMapping;
-import com.viaversion.viaversion.protocols.v1_10to1_11.metadata.MetadataRewriter1_11To1_10;
+import com.viaversion.viaversion.protocols.v1_10to1_11.metadata.MetadataRewriter1_11;
 import com.viaversion.viaversion.protocols.v1_10to1_11.rewriter.BlockEntityRewriter;
 import com.viaversion.viaversion.protocols.v1_10to1_11.rewriter.EntityIdRewriter;
 import com.viaversion.viaversion.protocols.v1_10to1_11.rewriter.ItemPacketRewriter1_11;
@@ -51,7 +51,7 @@ public class Protocol1_10To1_11 extends AbstractProtocol<ClientboundPackets1_9_3
         }
     };
 
-    private final MetadataRewriter1_11To1_10 entityRewriter = new MetadataRewriter1_11To1_10(this);
+    private final MetadataRewriter1_11 entityRewriter = new MetadataRewriter1_11(this);
     private final ItemPacketRewriter1_11 itemRewriter = new ItemPacketRewriter1_11(this);
 
     public Protocol1_10To1_11() {
@@ -96,7 +96,7 @@ public class Protocol1_10To1_11 extends AbstractProtocol<ClientboundPackets1_9_3
                     // Change Type :)
                     int type = wrapper.get(Types.VAR_INT, 1);
 
-                    EntityTypes1_11.EntityType entType = MetadataRewriter1_11To1_10.rewriteEntityType(type, wrapper.get(Types1_9.METADATA_LIST, 0));
+                    EntityTypes1_11.EntityType entType = MetadataRewriter1_11.rewriteEntityType(type, wrapper.get(Types1_9.METADATA_LIST, 0));
                     if (entType != null) {
                         wrapper.set(Types.VAR_INT, 1, entType.getId());
 
@@ -357,7 +357,7 @@ public class Protocol1_10To1_11 extends AbstractProtocol<ClientboundPackets1_9_3
     }
 
     @Override
-    public MetadataRewriter1_11To1_10 getEntityRewriter() {
+    public MetadataRewriter1_11 getEntityRewriter() {
         return entityRewriter;
     }
 

common/src/main/java/com/viaversion/viaversion/protocols/v1_10to1_11/metadata/MetadataRewriter1_11.java

@@ -34,9 +34,9 @@ import java.util.List;
 import java.util.Optional;
 import java.util.logging.Level;
 
-public class MetadataRewriter1_11To1_10 extends EntityRewriter<ClientboundPackets1_9_3, Protocol1_10To1_11> {
+public class MetadataRewriter1_11 extends EntityRewriter<ClientboundPackets1_9_3, Protocol1_10To1_11> {
 
-    public MetadataRewriter1_11To1_10(Protocol1_10To1_11 protocol) {
+    public MetadataRewriter1_11(Protocol1_10To1_11 protocol) {
         super(protocol);
     }
 

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/Protocol1_8To1_9.java

@@ -32,7 +32,6 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8.packet.ServerboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.metadata.MetadataRewriter1_9To1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.providers.BossBarProvider;
@@ -63,7 +62,8 @@ public class Protocol1_8To1_9 extends AbstractProtocol<ClientboundPackets1_8, Cl
             return ComponentUtil.convertJsonOrEmpty(line, SerializerVersion.V1_8, SerializerVersion.V1_9);
         }
     };
-    private final MetadataRewriter1_9To1_8 metadataRewriter = new MetadataRewriter1_9To1_8(this);
+    private final EntityPacketRewriter1_9 entityRewriter = new EntityPacketRewriter1_9(this);
+    private final ItemPacketRewriter1_9 itemRewriter = new ItemPacketRewriter1_9(this);
 
     public Protocol1_8To1_9() {
         super(ClientboundPackets1_8.class, ClientboundPackets1_9.class, ServerboundPackets1_8.class, ServerboundPackets1_9.class);
@@ -100,8 +100,6 @@ public class Protocol1_8To1_9 extends AbstractProtocol<ClientboundPackets1_8, Cl
 
         // Other Handlers
         SpawnPackets1_9.register(this);
-        ItemPacketRewriter1_9.register(this);
-        EntityPacketRewriter1_9.register(this);
         PlayerPackets1_9.register(this);
         WorldPacketRewriter1_9.register(this);
     }
@@ -136,7 +134,12 @@ public class Protocol1_8To1_9 extends AbstractProtocol<ClientboundPackets1_8, Cl
     }
 
     @Override
-    public MetadataRewriter1_9To1_8 getEntityRewriter() {
-        return metadataRewriter;
+    public EntityPacketRewriter1_9 getEntityRewriter() {
+        return entityRewriter;
+    }
+
+    @Override
+    public ItemPacketRewriter1_9 getItemRewriter() {
+        return itemRewriter;
     }
 }

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/data/EffectIds.java

@@ -20,7 +20,7 @@ package com.viaversion.viaversion.protocols.v1_8to1_9.data;
 import it.unimi.dsi.fastutil.ints.Int2IntMap;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 
-public class Effect {
+public class EffectIds {
 
     private static final Int2IntMap EFFECTS = new Int2IntOpenHashMap(19, .99F);
 

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/data/EntityIds.java

@@ -0,0 +1,97 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.v1_8to1_9.data;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class EntityIds {
+
+    public static final Map<String, Integer> ENTITY_NAME_TO_ID = new HashMap<>();
+    public static final Map<Integer, String> ENTITY_ID_TO_NAME = new HashMap<>();
+
+    static {
+        register(1, "Item");
+        register(2, "XPOrb");
+        register(7, "ThrownEgg");
+        register(8, "LeashKnot");
+        register(9, "Painting");
+        register(10, "Arrow");
+        register(11, "Snowball");
+        register(12, "Fireball");
+        register(13, "SmallFireball");
+        register(14, "ThrownEnderpearl");
+        register(15, "EyeOfEnderSignal");
+        register(16, "ThrownPotion");
+        register(17, "ThrownExpBottle");
+        register(18, "ItemFrame");
+        register(19, "WitherSkull");
+        register(20, "PrimedTnt");
+        register(21, "FallingSand");
+        register(22, "FireworksRocketEntity");
+        register(30, "ArmorStand");
+        register(40, "MinecartCommandBlock");
+        register(41, "Boat");
+        register(42, "MinecartRideable");
+        register(43, "MinecartChest");
+        register(44, "MinecartFurnace");
+        register(45, "MinecartTNT");
+        register(46, "MinecartHopper");
+        register(47, "MinecartSpawner");
+        register(48, "Mob");
+        register(49, "Monster");
+        register(50, "Creeper");
+        register(51, "Skeleton");
+        register(52, "Spider");
+        register(53, "Giant");
+        register(54, "Zombie");
+        register(55, "Slime");
+        register(56, "Ghast");
+        register(57, "PigZombie");
+        register(58, "Enderman");
+        register(59, "CaveSpider");
+        register(60, "Silverfish");
+        register(61, "Blaze");
+        register(62, "LavaSlime");
+        register(63, "EnderDragon");
+        register(64, "WitherBoss");
+        register(65, "Bat");
+        register(66, "Witch");
+        register(67, "Endermite");
+        register(68, "Guardian");
+        register(90, "Pig");
+        register(91, "Sheep");
+        register(92, "Cow");
+        register(93, "Chicken");
+        register(94, "Squid");
+        register(95, "Wolf");
+        register(96, "MushroomCow");
+        register(97, "SnowMan");
+        register(98, "Ozelot");
+        register(99, "VillagerGolem");
+        register(100, "EntityHorse");
+        register(101, "Rabbit");
+        register(120, "Villager");
+        register(200, "EnderCrystal");
+    }
+
+    private static void register(final int id, final String name) {
+        ENTITY_ID_TO_NAME.put(id, name);
+        ENTITY_NAME_TO_ID.put(name, id);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/data/MetaIndex.java

@@ -15,7 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package com.viaversion.viaversion.protocols.v1_8to1_9.metadata;
+package com.viaversion.viaversion.protocols.v1_8to1_9.data;
 
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/data/PotionIds.java

@@ -0,0 +1,189 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.v1_8to1_9.data;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.util.ComponentUtil;
+import com.viaversion.viaversion.util.SerializerVersion;
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
+import java.util.HashMap;
+import java.util.Map;
+
+public class PotionIds {
+
+    public static final Map<String, Integer> POTION_NAME_TO_ID = new HashMap<>();
+    public static final Map<Integer, String> POTION_ID_TO_NAME = new HashMap<>();
+
+    public static final Int2IntMap POTION_INDEX = new Int2IntOpenHashMap(36, .99F);
+
+    static {
+        register(-1, "empty");
+        register(0, "water");
+        register(64, "mundane");
+        register(32, "thick");
+        register(16, "awkward");
+
+        register(8198, "night_vision");
+        register(8262, "long_night_vision");
+
+        register(8206, "invisibility");
+        register(8270, "long_invisibility");
+
+        register(8203, "leaping");
+        register(8267, "long_leaping");
+        register(8235, "strong_leaping");
+
+        register(8195, "fire_resistance");
+        register(8259, "long_fire_resistance");
+
+        register(8194, "swiftness");
+        register(8258, "long_swiftness");
+        register(8226, "strong_swiftness");
+
+        register(8202, "slowness");
+        register(8266, "long_slowness");
+
+        register(8205, "water_breathing");
+        register(8269, "long_water_breathing");
+
+        register(8261, "healing");
+        register(8229, "strong_healing");
+
+        register(8204, "harming");
+        register(8236, "strong_harming");
+
+        register(8196, "poison");
+        register(8260, "long_poison");
+        register(8228, "strong_poison");
+
+        register(8193, "regeneration");
+        register(8257, "long_regeneration");
+        register(8225, "strong_regeneration");
+
+        register(8201, "strength");
+        register(8265, "long_strength");
+        register(8233, "strong_strength");
+
+        register(8200, "weakness");
+        register(8264, "long_weakness");
+
+    }
+
+    public static String potionNameFromDamage(short damage) {
+        String cached = POTION_ID_TO_NAME.get((int) damage);
+        if (cached != null) {
+            return cached;
+        }
+        if (damage == 0) {
+            return "water";
+        }
+
+        int effect = damage & 0xF;
+        int name = damage & 0x3F;
+        boolean enhanced = (damage & 0x20) > 0;
+        boolean extended = (damage & 0x40) > 0;
+
+        boolean canEnhance = true;
+        boolean canExtend = true;
+
+        String id;
+        switch (effect) {
+            case 1 -> id = "regeneration";
+            case 2 -> id = "swiftness";
+            case 3 -> {
+                id = "fire_resistance";
+                canEnhance = false;
+            }
+            case 4 -> id = "poison";
+            case 5 -> {
+                id = "healing";
+                canExtend = false;
+            }
+            case 6 -> {
+                id = "night_vision";
+                canEnhance = false;
+            }
+            case 8 -> {
+                id = "weakness";
+                canEnhance = false;
+            }
+            case 9 -> id = "strength";
+            case 10 -> {
+                id = "slowness";
+                canEnhance = false;
+            }
+            case 11 -> id = "leaping";
+            case 12 -> {
+                id = "harming";
+                canExtend = false;
+            }
+            case 13 -> {
+                id = "water_breathing";
+                canEnhance = false;
+            }
+            case 14 -> {
+                id = "invisibility";
+                canEnhance = false;
+            }
+            default -> {
+                canEnhance = false;
+                canExtend = false;
+                id = switch (name) {
+                    case 0 -> "mundane";
+                    case 16 -> "awkward";
+                    case 32 -> "thick";
+                    default -> "empty";
+                };
+            }
+        }
+
+        if (effect > 0) {
+            if (canEnhance && enhanced) {
+                id = "strong_" + id;
+            } else if (canExtend && extended) {
+                id = "long_" + id;
+            }
+        }
+
+        return id;
+    }
+
+    public static int getNewPotionID(int oldID) {
+        if (oldID >= 16384) {
+            oldID -= 8192;
+        }
+
+        int index = POTION_INDEX.get(oldID);
+        if (index != -1) {
+            return index;
+        }
+
+        oldID = POTION_NAME_TO_ID.get(potionNameFromDamage((short) oldID));
+        return (index = POTION_INDEX.get(oldID)) != -1 ? index : 0;
+    }
+
+    private static void register(final int id, final String name) {
+        POTION_INDEX.put(id, POTION_ID_TO_NAME.size());
+        POTION_ID_TO_NAME.put(id, name);
+        POTION_NAME_TO_ID.put(name, id);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/metadata/MetadataRewriter1_9To1_8.java

@@ -1,153 +0,0 @@
-/*
- * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2024 ViaVersion and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viaversion.protocols.v1_8to1_9.metadata;
-
-import com.viaversion.viaversion.api.minecraft.EulerAngle;
-import com.viaversion.viaversion.api.minecraft.Vector;
-import com.viaversion.viaversion.api.minecraft.entities.EntityType;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;
-import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.viaversion.api.minecraft.metadata.MetaType;
-import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
-import com.viaversion.viaversion.api.minecraft.metadata.types.MetaType1_8;
-import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ItemRewriter;
-import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
-import com.viaversion.viaversion.rewriter.EntityRewriter;
-import com.viaversion.viaversion.rewriter.meta.MetaHandlerEvent;
-import com.viaversion.viaversion.util.ComponentUtil;
-import com.viaversion.viaversion.util.SerializerVersion;
-import java.util.UUID;
-
-public class MetadataRewriter1_9To1_8 extends EntityRewriter<ClientboundPackets1_8, Protocol1_8To1_9> {
-
-    public MetadataRewriter1_9To1_8(Protocol1_8To1_9 protocol) {
-        super(protocol);
-    }
-
-    @Override
-    protected void registerRewrites() {
-        filter().handler(this::handleMetadata);
-    }
-
-    private void handleMetadata(MetaHandlerEvent event, Metadata metadata) {
-        EntityType type = event.entityType();
-        MetaIndex metaIndex = MetaIndex.searchIndex(type, metadata.id());
-        if (metaIndex == null) {
-            // Almost certainly bad data, remove it
-            event.cancel();
-            return;
-        }
-
-        if (metaIndex.getNewType() == null) {
-            event.cancel();
-            return;
-        }
-
-        metadata.setId(metaIndex.getNewIndex());
-        metadata.setMetaTypeUnsafe(metaIndex.getNewType());
-
-        Object value = metadata.getValue();
-        switch (metaIndex.getNewType()) {
-            case BYTE:
-                // convert from int, byte
-                if (metaIndex.getOldType() == MetaType1_8.BYTE) {
-                    metadata.setValue(value);
-                }
-                if (metaIndex.getOldType() == MetaType1_8.INT) {
-                    metadata.setValue(((Integer) value).byteValue());
-                }
-                // After writing the last one
-                if (metaIndex == MetaIndex.ENTITY_STATUS && type == EntityTypes1_10.EntityType.PLAYER) {
-                    byte val = 0;
-                    if ((((Byte) value) & 0x10) == 0x10) { // Player eating/aiming/drinking
-                        val = 1;
-                    }
-                    int newIndex = MetaIndex.PLAYER_HAND.getNewIndex();
-                    MetaType metaType = MetaIndex.PLAYER_HAND.getNewType();
-                    event.createExtraMeta(new Metadata(newIndex, metaType, val));
-                }
-                break;
-            case OPTIONAL_UUID:
-                String owner = (String) value;
-                UUID toWrite = null;
-                if (!owner.isEmpty()) {
-                    try {
-                        toWrite = UUID.fromString(owner);
-                    } catch (Exception ignored) {
-                    }
-                }
-                metadata.setValue(toWrite);
-                break;
-            case VAR_INT:
-                // convert from int, short, byte
-                if (metaIndex.getOldType() == MetaType1_8.BYTE) {
-                    metadata.setValue(((Byte) value).intValue());
-                }
-                if (metaIndex.getOldType() == MetaType1_8.SHORT) {
-                    metadata.setValue(((Short) value).intValue());
-                }
-                if (metaIndex.getOldType() == MetaType1_8.INT) {
-                    metadata.setValue(value);
-                }
-                break;
-            case FLOAT, STRING:
-                metadata.setValue(value);
-                break;
-            case BOOLEAN:
-                if (metaIndex == MetaIndex.AGEABLE_CREATURE_AGE)
-                    metadata.setValue((Byte) value < 0);
-                else
-                    metadata.setValue((Byte) value != 0);
-                break;
-            case ITEM:
-                metadata.setValue(value);
-                ItemRewriter.toClient((Item) metadata.getValue());
-                break;
-            case BLOCK_POSITION:
-                Vector vector = (Vector) value;
-                metadata.setValue(vector);
-                break;
-            case ROTATIONS:
-                EulerAngle angle = (EulerAngle) value;
-                metadata.setValue(angle);
-                break;
-            case COMPONENT:
-                // Was previously also a component, so just convert it
-                String text = (String) value;
-                metadata.setValue(ComponentUtil.convertJsonOrEmpty(text, SerializerVersion.V1_8, SerializerVersion.V1_9));
-                break;
-            case OPTIONAL_BLOCK_STATE:
-                // Convert from int, short, byte
-                metadata.setValue(((Number) value).intValue());
-                break;
-            default:
-                throw new RuntimeException("Unhandled MetaDataType: " + metaIndex.getNewType());
-        }
-    }
-
-    @Override
-    public EntityType typeFromId(int type) {
-        return EntityTypes1_10.getTypeFromId(type, false);
-    }
-
-    @Override
-    public EntityType objectTypeFromId(int type) {
-        return EntityTypes1_10.getTypeFromId(type, true);
-    }
-}

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/ChatRewriter.java

@@ -1,50 +0,0 @@
-/*
- * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2024 ViaVersion and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viaversion.protocols.v1_8to1_9.rewriter;
-
-import com.google.gson.JsonArray;
-import com.google.gson.JsonObject;
-import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
-import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
-
-public class ChatRewriter {
-    /**
-     * Rewrite chat being sent to the client so that gamemode issues don't occur.
-     *
-     * @param obj  The json object being sent by the server
-     * @param user The player involved. (Required for Gamemode info)
-     */
-    public static void toClient(JsonObject obj, UserConnection user) {
-        //Check gamemode change
-        if (obj.get("translate") != null && obj.get("translate").getAsString().equals("gameMode.changed")) {
-            EntityTracker1_9 tracker = user.getEntityTracker(Protocol1_8To1_9.class);
-            String gameMode = tracker.getGameMode().getText();
-
-            JsonObject gameModeObject = new JsonObject();
-            gameModeObject.addProperty("text", gameMode);
-            gameModeObject.addProperty("color", "gray");
-            gameModeObject.addProperty("italic", true);
-
-            JsonArray array = new JsonArray();
-            array.add(gameModeObject);
-
-            obj.add("with", array);
-        }
-    }
-}

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/EntityPacketRewriter1_9.java

@@ -19,23 +19,31 @@ package com.viaversion.viaversion.protocols.v1_8to1_9.rewriter;
 
 import com.google.common.collect.ImmutableList;
 import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.minecraft.EulerAngle;
+import com.viaversion.viaversion.api.minecraft.Vector;
+import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;
 import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.minecraft.metadata.MetaType;
 import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
+import com.viaversion.viaversion.api.minecraft.metadata.types.MetaType1_8;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_8;
 import com.viaversion.viaversion.api.type.types.version.Types1_9;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ItemRewriter;
 import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
-import com.viaversion.viaversion.protocols.v1_8to1_9.metadata.MetadataRewriter1_9To1_8;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.MetaIndex1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
+import com.viaversion.viaversion.rewriter.EntityRewriter;
+import com.viaversion.viaversion.rewriter.meta.MetaHandlerEvent;
+import com.viaversion.viaversion.util.ComponentUtil;
 import com.viaversion.viaversion.util.Pair;
+import com.viaversion.viaversion.util.SerializerVersion;
 import com.viaversion.viaversion.util.Triple;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -43,7 +51,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
-public class EntityPacketRewriter1_9 {
+public class EntityPacketRewriter1_9 extends EntityRewriter<ClientboundPackets1_8, Protocol1_8To1_9> {
     public static final ValueTransformer<Byte, Short> toNewShort = new ValueTransformer<>(Types.SHORT) {
         @Override
         public Short transform(PacketWrapper wrapper, Byte inputValue) {
@@ -51,7 +59,12 @@ public class EntityPacketRewriter1_9 {
         }
     };
 
-    public static void register(Protocol1_8To1_9 protocol) {
+    public EntityPacketRewriter1_9(Protocol1_8To1_9 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
         // Attach Entity Packet
         protocol.registerClientbound(ClientboundPackets1_8.SET_ENTITY_LINK, new PacketHandlers() {
 
@@ -175,7 +188,7 @@ public class EntityPacketRewriter1_9 {
                 // Item Rewriter
                 handler(wrapper -> {
                     Item stack = wrapper.get(Types.ITEM1_8, 0);
-                    ItemRewriter.toClient(stack);
+                    protocol.getItemRewriter().handleItemToClient(wrapper.user(), stack);
                 });
                 // Blocking
                 handler(wrapper -> {
@@ -203,7 +216,7 @@ public class EntityPacketRewriter1_9 {
                     int entityId = wrapper.get(Types.VAR_INT, 0);
                     EntityTracker1_9 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_9.class);
                     if (tracker.hasEntity(entityId)) {
-                        protocol.get(MetadataRewriter1_9To1_8.class).handleMetadata(entityId, metadataList, wrapper.user());
+                        handleMetadata(entityId, metadataList, wrapper.user());
                     } else {
                         wrapper.cancel();
                     }
@@ -372,4 +385,115 @@ public class EntityPacketRewriter1_9 {
             }
         });
     }
+
+    @Override
+    protected void registerRewrites() {
+        filter().handler(this::handleMetadata);
+    }
+
+    private void handleMetadata(MetaHandlerEvent event, Metadata metadata) {
+        EntityType type = event.entityType();
+        MetaIndex metaIndex = MetaIndex.searchIndex(type, metadata.id());
+        if (metaIndex == null) {
+            // Almost certainly bad data, remove it
+            event.cancel();
+            return;
+        }
+
+        if (metaIndex.getNewType() == null) {
+            event.cancel();
+            return;
+        }
+
+        metadata.setId(metaIndex.getNewIndex());
+        metadata.setMetaTypeUnsafe(metaIndex.getNewType());
+
+        Object value = metadata.getValue();
+        switch (metaIndex.getNewType()) {
+            case BYTE:
+                // convert from int, byte
+                if (metaIndex.getOldType() == MetaType1_8.BYTE) {
+                    metadata.setValue(value);
+                }
+                if (metaIndex.getOldType() == MetaType1_8.INT) {
+                    metadata.setValue(((Integer) value).byteValue());
+                }
+                // After writing the last one
+                if (metaIndex == MetaIndex.ENTITY_STATUS && type == EntityTypes1_10.EntityType.PLAYER) {
+                    byte val = 0;
+                    if ((((Byte) value) & 0x10) == 0x10) { // Player eating/aiming/drinking
+                        val = 1;
+                    }
+                    int newIndex = MetaIndex.PLAYER_HAND.getNewIndex();
+                    MetaType metaType = MetaIndex.PLAYER_HAND.getNewType();
+                    event.createExtraMeta(new Metadata(newIndex, metaType, val));
+                }
+                break;
+            case OPTIONAL_UUID:
+                String owner = (String) value;
+                UUID toWrite = null;
+                if (!owner.isEmpty()) {
+                    try {
+                        toWrite = UUID.fromString(owner);
+                    } catch (Exception ignored) {
+                    }
+                }
+                metadata.setValue(toWrite);
+                break;
+            case VAR_INT:
+                // convert from int, short, byte
+                if (metaIndex.getOldType() == MetaType1_8.BYTE) {
+                    metadata.setValue(((Byte) value).intValue());
+                }
+                if (metaIndex.getOldType() == MetaType1_8.SHORT) {
+                    metadata.setValue(((Short) value).intValue());
+                }
+                if (metaIndex.getOldType() == MetaType1_8.INT) {
+                    metadata.setValue(value);
+                }
+                break;
+            case FLOAT, STRING:
+                metadata.setValue(value);
+                break;
+            case BOOLEAN:
+                if (metaIndex == MetaIndex1_8.AGEABLE_CREATURE_AGE)
+                    metadata.setValue((Byte) value < 0);
+                else
+                    metadata.setValue((Byte) value != 0);
+                break;
+            case ITEM:
+                metadata.setValue(value);
+                protocol.getItemRewriter().handleItemToClient(event.user(), (Item) metadata.getValue());
+                break;
+            case BLOCK_POSITION:
+                Vector vector = (Vector) value;
+                metadata.setValue(vector);
+                break;
+            case ROTATIONS:
+                EulerAngle angle = (EulerAngle) value;
+                metadata.setValue(angle);
+                break;
+            case COMPONENT:
+                // Was previously also a component, so just convert it
+                String text = (String) value;
+                metadata.setValue(ComponentUtil.convertJsonOrEmpty(text, SerializerVersion.V1_8, SerializerVersion.V1_9));
+                break;
+            case OPTIONAL_BLOCK_STATE:
+                // Convert from int, short, byte
+                metadata.setValue(((Number) value).intValue());
+                break;
+            default:
+                throw new RuntimeException("Unhandled MetaDataType: " + metaIndex.getNewType());
+        }
+    }
+
+    @Override
+    public EntityType typeFromId(int type) {
+        return EntityTypes1_10.getTypeFromId(type, false);
+    }
+
+    @Override
+    public EntityType objectTypeFromId(int type) {
+        return EntityTypes1_10.getTypeFromId(type, true);
+    }
 }

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/ItemPacketRewriter1_9.java

@@ -17,22 +17,38 @@
  */
 package com.viaversion.viaversion.protocols.v1_8to1_9.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ItemRewriter;
 import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.EntityIds;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIds;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.InventoryTracker;
+import com.viaversion.viaversion.rewriter.ItemRewriter;
+import com.viaversion.viaversion.util.ComponentUtil;
+import com.viaversion.viaversion.util.Key;
+import com.viaversion.viaversion.util.SerializerVersion;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import java.util.Collections;
 
-public class ItemPacketRewriter1_9 {
+public class ItemPacketRewriter1_9 extends ItemRewriter<ClientboundPackets1_8, ServerboundPackets1_9, Protocol1_8To1_9> {
 
-    public static void register(Protocol1_8To1_9 protocol) {
+    public ItemPacketRewriter1_9(final Protocol1_8To1_9 protocol) {
+        super(protocol, null, null);
+    }
+
+    @Override
+    protected void registerPackets() {
         protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_DATA, new PacketHandlers() {
 
             @Override
@@ -115,7 +131,7 @@ public class ItemPacketRewriter1_9 {
                         entityTracker.syncShieldWithSword();
                     }
 
-                    ItemRewriter.toClient(stack);
+                    handleItemToServer(wrapper.user(), stack);
                 });
                 // Brewing patch
                 handler(wrapper -> {
@@ -155,7 +171,7 @@ public class ItemPacketRewriter1_9 {
                             inventoryTracker.setItemId(windowId, i, stack == null ? 0 : stack.identifier());
                         }
 
-                        ItemRewriter.toClient(stack);
+                        handleItemToClient(wrapper.user(), stack);
                     }
 
                     // Sync shield item in offhand with main hand
@@ -236,7 +252,7 @@ public class ItemPacketRewriter1_9 {
                         entityTracker.syncShieldWithSword();
                     }
 
-                    ItemRewriter.toServer(stack);
+                    handleItemToServer(wrapper.user(), stack);
                 });
                 // Elytra throw patch
                 handler(wrapper -> {
@@ -280,7 +296,7 @@ public class ItemPacketRewriter1_9 {
                         inventoryTracker.handleWindowClick(wrapper.user(), windowId, mode, hoverSlot, button);
                     }
 
-                    ItemRewriter.toServer(stack);
+                    handleItemToServer(wrapper.user(), stack);
                 });
                 // Brewing patch and elytra throw patch
                 handler(wrapper -> {
@@ -362,4 +378,118 @@ public class ItemPacketRewriter1_9 {
                 }
             });
     }
+
+    @Override
+    public @Nullable Item handleItemToClient(final UserConnection connection, @Nullable final Item item) {
+        if (item == null) return null;
+        if (item.identifier() == 383 && item.data() != 0) { // Monster Egg
+            CompoundTag tag = item.tag();
+            if (tag == null) {
+                tag = new CompoundTag();
+            }
+            CompoundTag entityTag = new CompoundTag();
+            String entityName = EntityIds.ENTITY_ID_TO_NAME.get((int) item.data());
+            if (entityName != null) {
+                StringTag id = new StringTag(entityName);
+                entityTag.put("id", id);
+                tag.put("EntityTag", entityTag);
+            }
+            item.setTag(tag);
+            item.setData((short) 0);
+        }
+        if (item.identifier() == 373) { // Potion
+            CompoundTag tag = item.tag();
+            if (tag == null) {
+                tag = new CompoundTag();
+            }
+            if (item.data() >= 16384) {
+                item.setIdentifier(438); // splash id
+                item.setData((short) (item.data() - 8192));
+            }
+            String name = PotionIds.potionNameFromDamage(item.data());
+            StringTag potion = new StringTag(Key.namespaced(name));
+            tag.put("Potion", potion);
+            item.setTag(tag);
+            item.setData((short) 0);
+        }
+        if (item.identifier() == 387) { // WRITTEN_BOOK
+            CompoundTag tag = item.tag();
+            if (tag == null) {
+                tag = new CompoundTag();
+            }
+
+            ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
+            if (pages == null) {
+                pages = new ListTag<>(Collections.singletonList(new StringTag(ComponentUtil.emptyJsonComponent().toString())));
+                tag.put("pages", pages);
+            } else {
+                for (int i = 0; i < pages.size(); i++) {
+                    final StringTag page = pages.get(i);
+                    page.setValue(ComponentUtil.convertJsonOrEmpty(page.getValue(), SerializerVersion.V1_8, SerializerVersion.V1_9).toString());
+                }
+            }
+            item.setTag(tag);
+        }
+        return item;
+    }
+
+    @Override
+    public @Nullable Item handleItemToServer(final UserConnection connection, @Nullable final Item item) {
+        if (item == null) return null;
+        if (item.identifier() == 383 && item.data() == 0) { // Monster Egg
+            CompoundTag tag = item.tag();
+            int data = 0;
+            if (tag != null && tag.getCompoundTag("EntityTag") != null) {
+                CompoundTag entityTag = tag.getCompoundTag("EntityTag");
+                StringTag id = entityTag.getStringTag("id");
+                if (id != null) {
+                    if (EntityIds.ENTITY_NAME_TO_ID.containsKey(id.getValue())) {
+                        data = EntityIds.ENTITY_NAME_TO_ID.get(id.getValue());
+                    }
+                }
+                tag.remove("EntityTag");
+            }
+            item.setTag(tag);
+            item.setData((short) data);
+        }
+        if (item.identifier() == 373) { // Potion
+            CompoundTag tag = item.tag();
+            int data = 0;
+            if (tag != null && tag.getStringTag("Potion") != null) {
+                StringTag potion = tag.getStringTag("Potion");
+                String potionName = Key.stripMinecraftNamespace(potion.getValue());
+                if (PotionIds.POTION_NAME_TO_ID.containsKey(potionName)) {
+                    data = PotionIds.POTION_NAME_TO_ID.get(potionName);
+                }
+                tag.remove("Potion");
+            }
+            item.setTag(tag);
+            item.setData((short) data);
+        }
+        // Splash potion
+        if (item.identifier() == 438) {
+            CompoundTag tag = item.tag();
+            int data = 0;
+            item.setIdentifier(373); // Potion
+            if (tag != null && tag.getStringTag("Potion") != null) {
+                StringTag potion = tag.getStringTag("Potion");
+                String potionName = Key.stripMinecraftNamespace(potion.getValue());
+                if (PotionIds.POTION_NAME_TO_ID.containsKey(potionName)) {
+                    data = PotionIds.POTION_NAME_TO_ID.get(potionName) + 8192;
+                }
+                tag.remove("Potion");
+            }
+            item.setTag(tag);
+            item.setData((short) data);
+        }
+
+        boolean newItem = item.identifier() >= 198 && item.identifier() <= 212;
+        newItem |= item.identifier() == 397 && item.data() == 5;
+        newItem |= item.identifier() >= 432 && item.identifier() <= 448;
+        if (newItem) { // Replace server-side unknown items
+            item.setIdentifier(1);
+            item.setData((short) 0);
+        }
+        return item;
+    }
 }

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/ItemRewriter.java

@@ -1,396 +0,0 @@
-/*
- * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2024 ViaVersion and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viaversion.protocols.v1_8to1_9.rewriter;
-
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.StringTag;
-import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.viaversion.util.ComponentUtil;
-import com.viaversion.viaversion.util.Key;
-import com.viaversion.viaversion.util.SerializerVersion;
-import it.unimi.dsi.fastutil.ints.Int2IntMap;
-import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-
-public class ItemRewriter {
-
-    public static final Map<String, Integer> ENTITY_NAME_TO_ID = new HashMap<>();
-    public static final Map<Integer, String> ENTITY_ID_TO_NAME = new HashMap<>();
-    public static final Map<String, Integer> POTION_NAME_TO_ID = new HashMap<>();
-    public static final Map<Integer, String> POTION_ID_TO_NAME = new HashMap<>();
-
-    public static final Int2IntMap POTION_INDEX = new Int2IntOpenHashMap(36, .99F);
-
-    static {
-        /* Entities */
-        registerEntity(1, "Item");
-        registerEntity(2, "XPOrb");
-        registerEntity(7, "ThrownEgg");
-        registerEntity(8, "LeashKnot");
-        registerEntity(9, "Painting");
-        registerEntity(10, "Arrow");
-        registerEntity(11, "Snowball");
-        registerEntity(12, "Fireball");
-        registerEntity(13, "SmallFireball");
-        registerEntity(14, "ThrownEnderpearl");
-        registerEntity(15, "EyeOfEnderSignal");
-        registerEntity(16, "ThrownPotion");
-        registerEntity(17, "ThrownExpBottle");
-        registerEntity(18, "ItemFrame");
-        registerEntity(19, "WitherSkull");
-        registerEntity(20, "PrimedTnt");
-        registerEntity(21, "FallingSand");
-        registerEntity(22, "FireworksRocketEntity");
-        registerEntity(30, "ArmorStand");
-        registerEntity(40, "MinecartCommandBlock");
-        registerEntity(41, "Boat");
-        registerEntity(42, "MinecartRideable");
-        registerEntity(43, "MinecartChest");
-        registerEntity(44, "MinecartFurnace");
-        registerEntity(45, "MinecartTNT");
-        registerEntity(46, "MinecartHopper");
-        registerEntity(47, "MinecartSpawner");
-        registerEntity(48, "Mob");
-        registerEntity(49, "Monster");
-        registerEntity(50, "Creeper");
-        registerEntity(51, "Skeleton");
-        registerEntity(52, "Spider");
-        registerEntity(53, "Giant");
-        registerEntity(54, "Zombie");
-        registerEntity(55, "Slime");
-        registerEntity(56, "Ghast");
-        registerEntity(57, "PigZombie");
-        registerEntity(58, "Enderman");
-        registerEntity(59, "CaveSpider");
-        registerEntity(60, "Silverfish");
-        registerEntity(61, "Blaze");
-        registerEntity(62, "LavaSlime");
-        registerEntity(63, "EnderDragon");
-        registerEntity(64, "WitherBoss");
-        registerEntity(65, "Bat");
-        registerEntity(66, "Witch");
-        registerEntity(67, "Endermite");
-        registerEntity(68, "Guardian");
-        registerEntity(90, "Pig");
-        registerEntity(91, "Sheep");
-        registerEntity(92, "Cow");
-        registerEntity(93, "Chicken");
-        registerEntity(94, "Squid");
-        registerEntity(95, "Wolf");
-        registerEntity(96, "MushroomCow");
-        registerEntity(97, "SnowMan");
-        registerEntity(98, "Ozelot");
-        registerEntity(99, "VillagerGolem");
-        registerEntity(100, "EntityHorse");
-        registerEntity(101, "Rabbit");
-        registerEntity(120, "Villager");
-        registerEntity(200, "EnderCrystal");
-
-        /* Potions */
-        registerPotion(-1, "empty");
-        registerPotion(0, "water");
-        registerPotion(64, "mundane");
-        registerPotion(32, "thick");
-        registerPotion(16, "awkward");
-
-        registerPotion(8198, "night_vision");
-        registerPotion(8262, "long_night_vision");
-
-        registerPotion(8206, "invisibility");
-        registerPotion(8270, "long_invisibility");
-
-        registerPotion(8203, "leaping");
-        registerPotion(8267, "long_leaping");
-        registerPotion(8235, "strong_leaping");
-
-        registerPotion(8195, "fire_resistance");
-        registerPotion(8259, "long_fire_resistance");
-
-        registerPotion(8194, "swiftness");
-        registerPotion(8258, "long_swiftness");
-        registerPotion(8226, "strong_swiftness");
-
-        registerPotion(8202, "slowness");
-        registerPotion(8266, "long_slowness");
-
-        registerPotion(8205, "water_breathing");
-        registerPotion(8269, "long_water_breathing");
-
-        registerPotion(8261, "healing");
-        registerPotion(8229, "strong_healing");
-
-        registerPotion(8204, "harming");
-        registerPotion(8236, "strong_harming");
-
-        registerPotion(8196, "poison");
-        registerPotion(8260, "long_poison");
-        registerPotion(8228, "strong_poison");
-
-        registerPotion(8193, "regeneration");
-        registerPotion(8257, "long_regeneration");
-        registerPotion(8225, "strong_regeneration");
-
-        registerPotion(8201, "strength");
-        registerPotion(8265, "long_strength");
-        registerPotion(8233, "strong_strength");
-
-        registerPotion(8200, "weakness");
-        registerPotion(8264, "long_weakness");
-
-    }
-
-    public static void toServer(Item item) {
-        if (item != null) {
-            if (item.identifier() == 383 && item.data() == 0) { // Monster Egg
-                CompoundTag tag = item.tag();
-                int data = 0;
-                if (tag != null && tag.getCompoundTag("EntityTag") != null) {
-                    CompoundTag entityTag = tag.getCompoundTag("EntityTag");
-                    StringTag id = entityTag.getStringTag("id");
-                    if (id != null) {
-                        if (ENTITY_NAME_TO_ID.containsKey(id.getValue()))
-                            data = ENTITY_NAME_TO_ID.get(id.getValue());
-                    }
-                    tag.remove("EntityTag");
-                }
-                item.setTag(tag);
-                item.setData((short) data);
-            }
-            if (item.identifier() == 373) { // Potion
-                CompoundTag tag = item.tag();
-                int data = 0;
-                if (tag != null && tag.getStringTag("Potion") != null) {
-                    StringTag potion = tag.getStringTag("Potion");
-                    String potionName = Key.stripMinecraftNamespace(potion.getValue());
-                    if (POTION_NAME_TO_ID.containsKey(potionName)) {
-                        data = POTION_NAME_TO_ID.get(potionName);
-                    }
-                    tag.remove("Potion");
-                }
-                item.setTag(tag);
-                item.setData((short) data);
-            }
-            // Splash potion
-            if (item.identifier() == 438) {
-                CompoundTag tag = item.tag();
-                int data = 0;
-                item.setIdentifier(373); // Potion
-                if (tag != null && tag.getStringTag("Potion") != null) {
-                    StringTag potion = tag.getStringTag("Potion");
-                    String potionName = Key.stripMinecraftNamespace(potion.getValue());
-                    if (POTION_NAME_TO_ID.containsKey(potionName)) {
-                        data = POTION_NAME_TO_ID.get(potionName) + 8192;
-                    }
-                    tag.remove("Potion");
-                }
-                item.setTag(tag);
-                item.setData((short) data);
-            }
-
-            boolean newItem = item.identifier() >= 198 && item.identifier() <= 212;
-            newItem |= item.identifier() == 397 && item.data() == 5;
-            newItem |= item.identifier() >= 432 && item.identifier() <= 448;
-            if (newItem) { // Replace server-side unknown items
-                item.setIdentifier(1);
-                item.setData((short) 0);
-            }
-        }
-    }
-
-    public static void rewriteBookToServer(Item item) {
-        int id = item.identifier();
-        if (id != 387) {
-            return;
-        }
-
-        CompoundTag tag = item.tag();
-        ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
-        if (pages == null) {
-            return;
-        }
-
-        for (int i = 0; i < pages.size(); i++) {
-            final StringTag pageTag = pages.get(i);
-            final String value = pageTag.getValue();
-
-            pageTag.setValue(ComponentUtil.convertJson(value, SerializerVersion.V1_9, SerializerVersion.V1_8).toString());
-        }
-    }
-
-    public static void toClient(Item item) {
-        if (item != null) {
-            if (item.identifier() == 383 && item.data() != 0) { // Monster Egg
-                CompoundTag tag = item.tag();
-                if (tag == null) {
-                    tag = new CompoundTag();
-                }
-                CompoundTag entityTag = new CompoundTag();
-                String entityName = ENTITY_ID_TO_NAME.get((int) item.data());
-                if (entityName != null) {
-                    StringTag id = new StringTag(entityName);
-                    entityTag.put("id", id);
-                    tag.put("EntityTag", entityTag);
-                }
-                item.setTag(tag);
-                item.setData((short) 0);
-            }
-            if (item.identifier() == 373) { // Potion
-                CompoundTag tag = item.tag();
-                if (tag == null) {
-                    tag = new CompoundTag();
-                }
-                if (item.data() >= 16384) {
-                    item.setIdentifier(438); // splash id
-                    item.setData((short) (item.data() - 8192));
-                }
-                String name = potionNameFromDamage(item.data());
-                StringTag potion = new StringTag(Key.namespaced(name));
-                tag.put("Potion", potion);
-                item.setTag(tag);
-                item.setData((short) 0);
-            }
-            if (item.identifier() == 387) { // WRITTEN_BOOK
-                CompoundTag tag = item.tag();
-                if (tag == null) {
-                    tag = new CompoundTag();
-                }
-
-                ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
-                if (pages == null) {
-                    pages = new ListTag<>(Collections.singletonList(new StringTag(ComponentUtil.emptyJsonComponent().toString())));
-                    tag.put("pages", pages);
-                    item.setTag(tag);
-                    return;
-                }
-
-                for (int i = 0; i < pages.size(); i++) {
-                    final StringTag page = pages.get(i);
-                    page.setValue(ComponentUtil.convertJsonOrEmpty(page.getValue(), SerializerVersion.V1_8, SerializerVersion.V1_9).toString());
-                }
-                item.setTag(tag);
-            }
-        }
-    }
-
-    public static String potionNameFromDamage(short damage) {
-        String cached = POTION_ID_TO_NAME.get((int) damage);
-        if (cached != null) {
-            return cached;
-        }
-        if (damage == 0) {
-            return "water";
-        }
-
-        int effect = damage & 0xF;
-        int name = damage & 0x3F;
-        boolean enhanced = (damage & 0x20) > 0;
-        boolean extended = (damage & 0x40) > 0;
-
-        boolean canEnhance = true;
-        boolean canExtend = true;
-
-        String id;
-        switch (effect) {
-            case 1 -> id = "regeneration";
-            case 2 -> id = "swiftness";
-            case 3 -> {
-                id = "fire_resistance";
-                canEnhance = false;
-            }
-            case 4 -> id = "poison";
-            case 5 -> {
-                id = "healing";
-                canExtend = false;
-            }
-            case 6 -> {
-                id = "night_vision";
-                canEnhance = false;
-            }
-            case 8 -> {
-                id = "weakness";
-                canEnhance = false;
-            }
-            case 9 -> id = "strength";
-            case 10 -> {
-                id = "slowness";
-                canEnhance = false;
-            }
-            case 11 -> id = "leaping";
-            case 12 -> {
-                id = "harming";
-                canExtend = false;
-            }
-            case 13 -> {
-                id = "water_breathing";
-                canEnhance = false;
-            }
-            case 14 -> {
-                id = "invisibility";
-                canEnhance = false;
-            }
-            default -> {
-                canEnhance = false;
-                canExtend = false;
-                id = switch (name) {
-                    case 0 -> "mundane";
-                    case 16 -> "awkward";
-                    case 32 -> "thick";
-                    default -> "empty";
-                };
-            }
-        }
-
-        if (effect > 0) {
-            if (canEnhance && enhanced) {
-                id = "strong_" + id;
-            } else if (canExtend && extended) {
-                id = "long_" + id;
-            }
-        }
-
-        return id;
-    }
-
-    public static int getNewEffectID(int oldID) {
-        if (oldID >= 16384) {
-            oldID -= 8192;
-        }
-
-        int index = POTION_INDEX.get(oldID);
-        if (index != -1) {
-            return index;
-        }
-
-        oldID = POTION_NAME_TO_ID.get(potionNameFromDamage((short) oldID));
-        return (index = POTION_INDEX.get(oldID)) != -1 ? index : 0;
-    }
-
-    private static void registerEntity(int id, String name) {
-        ENTITY_ID_TO_NAME.put(id, name);
-        ENTITY_NAME_TO_ID.put(name, id);
-    }
-
-    private static void registerPotion(int id, String name) {
-        POTION_INDEX.put(id, POTION_ID_TO_NAME.size());
-        POTION_ID_TO_NAME.put(id, name);
-        POTION_NAME_TO_ID.put(name, id);
-    }
-}

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/PlayerPackets1_9.java

@@ -17,7 +17,11 @@
  */
 package com.viaversion.viaversion.protocols.v1_8to1_9.rewriter;
 
+import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;
@@ -27,10 +31,9 @@ import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ItemRewriter;
 import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ChatRewriter;
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.GameMode;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIds;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.providers.CommandBlockProvider;
 import com.viaversion.viaversion.protocols.v1_8to1_9.providers.CompressionProvider;
@@ -38,6 +41,8 @@ import com.viaversion.viaversion.protocols.v1_8to1_9.providers.MainHandProvider;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.ClientChunks;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.MovementTracker;
+import com.viaversion.viaversion.util.ComponentUtil;
+import com.viaversion.viaversion.util.SerializerVersion;
 
 public class PlayerPackets1_9 {
     public static void register(Protocol1_8To1_9 protocol) {
@@ -49,7 +54,20 @@ public class PlayerPackets1_9 {
 
                 handler(wrapper -> {
                     JsonObject obj = (JsonObject) wrapper.get(Types.COMPONENT, 0);
-                    ChatRewriter.toClient(obj, wrapper.user());
+                    if (obj.get("translate") != null && obj.get("translate").getAsString().equals("gameMode.changed")) {
+                        EntityTracker1_9 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_9.class);
+                        String gameMode = tracker.getGameMode().getText();
+
+                        JsonObject gameModeObject = new JsonObject();
+                        gameModeObject.addProperty("text", gameMode);
+                        gameModeObject.addProperty("color", "gray");
+                        gameModeObject.addProperty("italic", true);
+
+                        JsonArray array = new JsonArray();
+                        array.add(gameModeObject);
+
+                        obj.add("with", array);
+                    }
                 });
             }
         });
@@ -270,16 +288,16 @@ public class PlayerPackets1_9 {
 
                         for (int i = 0; i < size; ++i) {
                             Item item1 = wrapper.passthrough(Types.ITEM1_8);
-                            ItemRewriter.toClient(item1);
+                            protocol.getItemRewriter().handleItemToClient(wrapper.user(), item1);
 
                             Item item2 = wrapper.passthrough(Types.ITEM1_8);
-                            ItemRewriter.toClient(item2);
+                            protocol.getItemRewriter().handleItemToClient(wrapper.user(), item2);
 
                             boolean present = wrapper.passthrough(Types.BOOLEAN);
 
                             if (present) {
                                 Item item3 = wrapper.passthrough(Types.ITEM1_8);
-                                ItemRewriter.toClient(item3);
+                                protocol.getItemRewriter().handleItemToClient(wrapper.user(), item3);
                             }
 
                             wrapper.passthrough(Types.BOOLEAN);
@@ -406,7 +424,18 @@ public class PlayerPackets1_9 {
                         Item item = wrapper.passthrough(Types.ITEM1_8);
                         if (item != null) {
                             item.setIdentifier(387); // Written Book
-                            ItemRewriter.rewriteBookToServer(item);
+                            CompoundTag tag = item.tag();
+                            ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
+                            if (pages == null) {
+                                return;
+                            }
+
+                            for (int i = 0; i < pages.size(); i++) {
+                                final StringTag pageTag = pages.get(i);
+                                final String value = pageTag.getValue();
+
+                                pageTag.setValue(ComponentUtil.convertJson(value, SerializerVersion.V1_9, SerializerVersion.V1_8).toString());
+                            }
                         }
                     }
                     if (name.equals("MC|AutoCmd")) {

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/SpawnPackets1_9.java

@@ -33,7 +33,7 @@ import com.viaversion.viaversion.api.type.types.version.Types1_8;
 import com.viaversion.viaversion.api.type.types.version.Types1_9;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
-import com.viaversion.viaversion.protocols.v1_8to1_9.metadata.MetadataRewriter1_9To1_8;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIds;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
 import java.util.ArrayList;
@@ -107,7 +107,7 @@ public class SpawnPackets1_9 {
                             wrapper1.write(Types.VAR_INT, entityID);
                             List<Metadata> meta = new ArrayList<>();
                             Item item = new DataItem(373, (byte) 1, (short) data, null); // Potion
-                            ItemRewriter.toClient(item); // Rewrite so that it gets the right nbt
+                            protocol.getItemRewriter().handleItemToClient(wrapper.user(), item); // Rewrite so that it gets the right nbt
                             // TEMP FIX FOR POTIONS UNTIL WE FIGURE OUT HOW TO TRANSFORM SENT PACKETS
                             Metadata potion = new Metadata(5, MetaType1_9.ITEM, item);
                             meta.add(potion);
@@ -199,7 +199,7 @@ public class SpawnPackets1_9 {
                     int entityId = wrapper.get(Types.VAR_INT, 0);
                     EntityTracker1_9 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_9.class);
                     if (tracker.hasEntity(entityId)) {
-                        protocol.get(MetadataRewriter1_9To1_8.class).handleMetadata(entityId, metadataList, wrapper.user());
+                        protocol.getEntityRewriter().handleMetadata(entityId, metadataList, wrapper.user());
                     } else {
                         Via.getPlatform().getLogger().warning("Unable to find entity for metadata, entity ID: " + entityId);
                         metadataList.clear();
@@ -277,7 +277,7 @@ public class SpawnPackets1_9 {
                     int entityId = wrapper.get(Types.VAR_INT, 0);
                     EntityTracker1_9 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_9.class);
                     if (tracker.hasEntity(entityId)) {
-                        protocol.get(MetadataRewriter1_9To1_8.class).handleMetadata(entityId, metadataList, wrapper.user());
+                        protocol.getEntityRewriter().handleMetadata(entityId, metadataList, wrapper.user());
                     } else {
                         Via.getPlatform().getLogger().warning("Unable to find entity for metadata, entity ID: " + entityId);
                         metadataList.clear();

common/src/main/java/com/viaversion/viaversion/protocols/v1_8to1_9/rewriter/WorldPacketRewriter1_9.java

@@ -37,12 +37,12 @@ import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_8;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_1;
 import com.viaversion.viaversion.protocols.v1_8.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8.packet.ServerboundPackets1_8;
-import com.viaversion.viaversion.protocols.v1_8to1_9.rewriter.ItemRewriter;
 import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIds;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.providers.CommandBlockProvider;
-import com.viaversion.viaversion.protocols.v1_8to1_9.data.Effect;
+import com.viaversion.viaversion.protocols.v1_8to1_9.data.EffectIds;
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.SoundEffect;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.ClientChunks;
 import com.viaversion.viaversion.protocols.v1_8to1_9.storage.EntityTracker1_9;
@@ -77,7 +77,7 @@ public class WorldPacketRewriter1_9 {
                 handler(wrapper -> {
                     int id = wrapper.get(Types.INT, 0);
 
-                    id = Effect.getNewId(id);
+                    id = EffectIds.getNewId(id);
                     wrapper.set(Types.INT, 0, id);
                 });
                 // Rewrite potion effect as it changed to use a dynamic registry
@@ -85,7 +85,7 @@ public class WorldPacketRewriter1_9 {
                     int id = wrapper.get(Types.INT, 0);
                     if (id == 2002) {
                         int data = wrapper.get(Types.INT, 1);
-                        int newData = ItemRewriter.getNewEffectID(data);
+                        int newData = PotionIds.getNewPotionID(data);
                         wrapper.set(Types.INT, 1, newData);
                     }
                 });