Close the open inventory before opening a new one on 1.16

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/Protocol1_16To1_15_2.java

@@ -24,6 +24,7 @@ import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.packets.EntityPackets;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.packets.InventoryPackets;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.packets.WorldPackets;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.storage.EntityTracker1_16;
+import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.storage.InventoryTracker1_16;
 import us.myles.ViaVersion.util.GsonUtil;
 
 import java.nio.charset.StandardCharsets;
@@ -273,5 +274,6 @@ public class Protocol1_16To1_15_2 extends Protocol<ClientboundPackets1_15, Clien
     @Override
     public void init(UserConnection userConnection) {
         userConnection.put(new EntityTracker1_16(userConnection));
+        userConnection.put(new InventoryTracker1_16(userConnection));
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/InventoryPackets.java

@@ -6,6 +6,7 @@ import com.github.steveice10.opennbt.tag.builtin.ListTag;
 import com.github.steveice10.opennbt.tag.builtin.LongTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import com.github.steveice10.opennbt.tag.builtin.Tag;
+import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.minecraft.item.Item;
 import us.myles.ViaVersion.api.protocol.Protocol;
@@ -15,8 +16,10 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.UUIDIntArrayType;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.data.RecipeRewriter1_14;
+import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.Protocol1_16To1_15_2;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ServerboundPackets1_16;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.data.MappingData;
+import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.storage.InventoryTracker1_16;
 
 import java.util.UUID;
 
@@ -28,22 +31,50 @@ public class InventoryPackets {
         protocol.registerOutgoing(ClientboundPackets1_15.OPEN_WINDOW, new PacketRemapper() {
             @Override
             public void registerMap() {
-                map(Type.VAR_INT);
+                map(Type.VAR_INT); // Window Id
-                map(Type.VAR_INT);
+                map(Type.VAR_INT); // Window Type
-                map(Type.COMPONENT);
+                map(Type.COMPONENT); // Window Title
 
                 handler(wrapper -> {
+                    InventoryTracker1_16 inventoryTracker = wrapper.user().get(InventoryTracker1_16.class);
+                    if (inventoryTracker.getInventory() != -1) {
+                        // Close open inventory before opening a new one.
+                        PacketWrapper closePacket = wrapper.create(0x13); // 1.16 inventory close
+                        closePacket.write(Type.UNSIGNED_BYTE, inventoryTracker.getInventory());
+                        closePacket.send(Protocol1_16To1_15_2.class, true, true);
+                    }
+
+                    int windowId = wrapper.get(Type.VAR_INT, 0);
                     int windowType = wrapper.get(Type.VAR_INT, 1);
                     if (windowType >= 20) { // smithing added with id 20
                         wrapper.set(Type.VAR_INT, 1, ++windowType);
                     }
+
+                    inventoryTracker.setInventory((short) windowId);
+
+                    // Workaround for packet order issue
+                    wrapper.send(Protocol1_16To1_15_2.class, true, true);
+                    wrapper.cancel();
                 });
             }
         });
+
+        protocol.registerOutgoing(ClientboundPackets1_15.CLOSE_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE);
+
+                handler(wrapper -> {
+                    InventoryTracker1_16 inventoryTracker = wrapper.user().get(InventoryTracker1_16.class);
+                    inventoryTracker.setInventory((short) -1);
+                });
+            }
+        });
+
         protocol.registerOutgoing(ClientboundPackets1_15.WINDOW_PROPERTY, new PacketRemapper() {
             @Override
             public void registerMap() {
-                map(Type.UNSIGNED_BYTE); // Window id
+                map(Type.UNSIGNED_BYTE); // Window Id
                 map(Type.SHORT); // Property
                 map(Type.SHORT); // Value
 
@@ -83,6 +114,18 @@ public class InventoryPackets {
         itemRewriter.registerClickWindow(ServerboundPackets1_16.CLICK_WINDOW, Type.FLAT_VAR_INT_ITEM);
         itemRewriter.registerCreativeInvAction(ServerboundPackets1_16.CREATIVE_INVENTORY_ACTION, Type.FLAT_VAR_INT_ITEM);
 
+        protocol.registerIncoming(ServerboundPackets1_16.CLOSE_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE);
+
+                handler(wrapper -> {
+                    InventoryTracker1_16 inventoryTracker = wrapper.user().get(InventoryTracker1_16.class);
+                    inventoryTracker.setInventory((short) -1);
+                });
+            }
+        });
+
         protocol.registerIncoming(ServerboundPackets1_16.EDIT_BOOK, new PacketRemapper() {
             @Override
             public void registerMap() {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/storage/InventoryTracker1_16.java

@@ -0,0 +1,20 @@
+package us.myles.ViaVersion.protocols.protocol1_16to1_15_2.storage;
+
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+public class InventoryTracker1_16 extends StoredObject {
+    private short inventory = -1;
+
+    public InventoryTracker1_16(UserConnection user) {
+        super(user);
+    }
+
+    public short getInventory() {
+        return this.inventory;
+    }
+
+    public void setInventory(short inventory) {
+        this.inventory = inventory;
+    }
+}