remap trading gui 1.131 to 1.13

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13to1_13_1/packets/InventoryPackets.java

@@ -16,30 +16,12 @@ public class InventoryPackets {
             Outgoing packets
          */
 
-        // Set slot packet
-        protocol.registerOutgoing(State.PLAY, 0x17, 0x17, new PacketRemapper() {
-            @Override
-            public void registerMap() {
-                map(Type.BYTE); // 0 - Window ID
-                map(Type.SHORT); // 1 - Slot ID
-                map(Type.FLAT_ITEM, Type.FLAT_ITEM); // 2 - Slot Value
-
-                handler(new PacketHandler() {
-                    @Override
-                    public void handle(PacketWrapper wrapper) throws Exception {
-                        Item stack = wrapper.get(Type.FLAT_ITEM, 0);
-                        toClient(stack);
-                    }
-                });
-            }
-        });
-
         // Window items packet
         protocol.registerOutgoing(State.PLAY, 0x15, 0x15, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // 0 - Window ID
-                map(Type.FLAT_ITEM_ARRAY, Type.FLAT_ITEM_ARRAY); // 1 - Window Values
+                map(Type.FLAT_ITEM_ARRAY); // 1 - Window Values
 
                 handler(new PacketHandler() {
                     @Override
@@ -52,13 +34,68 @@ public class InventoryPackets {
             }
         });
 
+        // Set slot packet
+        protocol.registerOutgoing(State.PLAY, 0x17, 0x17, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot ID
+                map(Type.FLAT_ITEM); // 2 - Slot Value
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Item stack = wrapper.get(Type.FLAT_ITEM, 0);
+                        toClient(stack);
+                    }
+                });
+            }
+        });
+
+        //Plugin Message
+        protocol.registerOutgoing(State.PLAY, 0x19, 0x19, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        String channel = wrapper.passthrough(Type.STRING);
+                        if (channel.equals("minecraft:trader_list")) {
+                            wrapper.passthrough(Type.INT); //Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                //Input Item
+                                Item input = wrapper.passthrough(Type.FLAT_ITEM);
+                                toClient(input);
+                                //Output Item
+                                Item output = wrapper.passthrough(Type.FLAT_ITEM);
+                                toClient(input);
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); //Has second item
+                                if (secondItem) {
+                                    //Second Item
+                                    Item second = wrapper.passthrough(Type.FLAT_ITEM);
+                                    toClient(input);
+                                }
+
+                                wrapper.passthrough(Type.BOOLEAN); //Trade disabled
+                                wrapper.passthrough(Type.INT); //Number of tools uses
+                                wrapper.passthrough(Type.INT); //Maximum number of trade uses
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
         // Entity Equipment Packet
         protocol.registerOutgoing(State.PLAY, 0x42, 0x42, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
                 map(Type.VAR_INT); // 1 - Slot ID
-                map(Type.FLAT_ITEM, Type.FLAT_ITEM); // 2 - Item
+                map(Type.FLAT_ITEM); // 2 - Item
 
                 handler(new PacketHandler() {
                     @Override
@@ -84,7 +121,7 @@ public class InventoryPackets {
                         map(Type.BYTE); // 2 - Button
                         map(Type.SHORT); // 3 - Action number
                         map(Type.VAR_INT); // 4 - Mode
-                        map(Type.FLAT_ITEM, Type.FLAT_ITEM); // 5 - Clicked Item
+                        map(Type.FLAT_ITEM); // 5 - Clicked Item
 
                         handler(new PacketHandler() {
                             @Override
@@ -102,7 +139,7 @@ public class InventoryPackets {
                     @Override
                     public void registerMap() {
                         map(Type.SHORT); // 0 - Slot
-                        map(Type.FLAT_ITEM, Type.FLAT_ITEM); // 1 - Clicked Item
+                        map(Type.FLAT_ITEM); // 1 - Clicked Item
 
                         handler(new PacketHandler() {
                             @Override