Start implementing boilerplate for manipulating inventory

bot/client.go

@@ -9,7 +9,9 @@ import (
 	"github.com/Tnze/go-mc/bot/world"
 	"github.com/Tnze/go-mc/bot/world/entity"
 	"github.com/Tnze/go-mc/bot/world/entity/player"
+	"github.com/Tnze/go-mc/data"
 	"github.com/Tnze/go-mc/net"
+	"github.com/Tnze/go-mc/net/packet"
 	pk "github.com/Tnze/go-mc/net/packet"
 )
 
@@ -47,6 +49,10 @@ func (c *Client) Close() error {
 	return err
 }
 
+func (c *Client) SendCloseWindow(windowID byte) error {
+	return c.conn.WritePacket(packet.Marshal(data.CloseWindowServerbound, pk.UnsignedByte(windowID)))
+}
+
 // NewClient init and return a new Client.
 //
 // A new Client has default name "Steve" and zero UUID.

bot/event.go

@@ -7,6 +7,7 @@ import (
 	"github.com/google/uuid"
 
 	pk "github.com/Tnze/go-mc/net/packet"
+	"github.com/Tnze/go-mc/net/ptypes"
 )
 
 type seenPacketFlags uint8
@@ -41,6 +42,7 @@ type eventBroker struct {
 	SoundPlay      func(name string, category int, x, y, z float64, volume, pitch float32) error
 	PluginMessage  func(channel string, data []byte) error
 	HeldItemChange func(slot int) error
+	OpenWindow     func(pkt ptypes.OpenWindow) error
 
 	// ExperienceChange will be called every time player's experience level updates.
 	// Parameters:

bot/ingame.go

@@ -149,6 +149,8 @@ func (c *Client) handlePacket(p pk.Packet) (disconnect bool, err error) {
 		err = handleHeldItemPacket(c, p)
 	case data.WindowItems:
 		err = handleWindowItemsPacket(c, p)
+	case data.OpenWindow:
+		err = handleOpenWindowPacket(c, p)
 
 	case data.DeclareRecipes:
 		// handleDeclareRecipesPacket(g, reader)
@@ -276,7 +278,7 @@ func handleEntityAnimationPacket(c *Client, p pk.Packet) error {
 	if err := se.Decode(p); err != nil {
 		return err
 	}
-	fmt.Printf("EntityAnimationClientbound: %+v\n", se)
+	// fmt.Printf("EntityAnimationClientbound: %+v\n", se)
 	return nil
 }
 
@@ -288,7 +290,7 @@ func handleEntityStatusPacket(c *Client, p pk.Packet) error {
 	if err := p.Scan(&id, &status); err != nil {
 		return err
 	}
-	fmt.Printf("EntityStatus: %v, %v\n", id, status)
+	// fmt.Printf("EntityStatus: %v, %v\n", id, status)
 	return nil
 }
 
@@ -722,6 +724,18 @@ func handleWindowItemsPacket(c *Client, p pk.Packet) error {
 	return nil
 }
 
+func handleOpenWindowPacket(c *Client, p pk.Packet) error {
+	var pkt ptypes.OpenWindow
+	if err := pkt.Decode(p); err != nil {
+		return err
+	}
+
+	if c.Events.OpenWindow != nil {
+		return c.Events.OpenWindow(pkt)
+	}
+	return nil
+}
+
 func handleSetExperience(c *Client, p pk.Packet) (err error) {
 	var (
 		bar   pk.Float

net/ptypes/inventory.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 
 	"github.com/Tnze/go-mc/bot/world/entity"
+	"github.com/Tnze/go-mc/chat"
 	"github.com/Tnze/go-mc/nbt"
 	pk "github.com/Tnze/go-mc/net/packet"
 )
@@ -52,3 +53,17 @@ func (p *WindowItems) Decode(pkt pk.Packet) error {
 	}
 	return nil
 }
+
+// OpenWindow is a clientbound packet which opens an inventory.
+type OpenWindow struct {
+	WindowID   pk.VarInt
+	WindowType pk.VarInt
+	Title      chat.Message
+}
+
+func (p *OpenWindow) Decode(pkt pk.Packet) error {
+	if err := pkt.Scan(&p.WindowID, &p.WindowType, &p.Title); err != nil && !errors.Is(err, nbt.ErrEND) {
+		return err
+	}
+	return nil
+}