Implement TransactionConfirmation event + packet

bot/world/entity/entity.go

@@ -1,8 +1,10 @@
 package entity
 
 import (
+	"bytes"
+
 	"github.com/Tnze/go-mc/data/entity"
-	item "github.com/Tnze/go-mc/data/items"
+	item "github.com/Tnze/go-mc/data/item"
 	"github.com/Tnze/go-mc/nbt"
 	pk "github.com/Tnze/go-mc/net/packet"
 	"github.com/google/uuid"
@@ -45,7 +47,7 @@ type Entity struct {
 // The Slot data structure is how Minecraft represents an item and its associated data in the Minecraft Protocol
 type Slot struct {
 	Present bool
-	ItemID  int32
+	ItemID  item.ID
 	Count   int8
 	NBT     interface{}
 }
@@ -56,9 +58,11 @@ func (s *Slot) Decode(r pk.DecodeReader) error {
 		return err
 	}
 	if s.Present {
-		if err := (*pk.VarInt)(&s.ItemID).Decode(r); err != nil {
+		var itemID pk.VarInt
+		if err := itemID.Decode(r); err != nil {
 			return err
 		}
+		s.ItemID = item.ID(itemID)
 		if err := (*pk.Byte)(&s.Count).Decode(r); err != nil {
 			return err
 		}
@@ -69,6 +73,25 @@ func (s *Slot) Decode(r pk.DecodeReader) error {
 	return nil
 }
 
+func (s Slot) Encode() []byte {
+	if !s.Present {
+		return pk.Boolean(false).Encode()
+	}
+
+	var b bytes.Buffer
+	b.Write(pk.Boolean(true).Encode())
+	b.Write(pk.VarInt(s.ItemID).Encode())
+	b.Write(pk.Byte(s.Count).Encode())
+
+	if s.NBT != nil {
+		nbt.NewEncoder(&b).Encode(s.NBT)
+	} else {
+		b.Write([]byte{nbt.TagEnd})
+	}
+
+	return b.Bytes()
+}
+
 func (s Slot) String() string {
 	return item.ByID[item.ID(s.ItemID)].DisplayName
 }