1.21.8 data

bot/ingame.go

@@ -0,0 +1,93 @@
+package bot
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/Tnze/go-mc/data/packetid"
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+// HandleGame receive server packet and response them correctly.
+// Note that HandleGame will block if you don't receive from Events.
+func (c *Client) HandleGame() error {
+	for {
+		var p pk.Packet
+		// Read packets
+		if err := c.Conn.ReadPacket(&p); err != nil {
+			return err
+		}
+
+		if p.ID == int32(packetid.BundleDelimiter) {
+			err := c.handleBundlePackets()
+			if err != nil {
+				return err
+			}
+		} else {
+			// handle packets
+			err := c.handlePacket(p)
+			if err != nil {
+				return err
+			}
+
+			// return the packet buffer
+			c.Conn.pool.Put(p.Data)
+		}
+	}
+}
+
+type PacketHandlerError struct {
+	ID  packetid.ClientboundPacketID
+	Err error
+}
+
+func (d PacketHandlerError) Error() string {
+	return fmt.Sprintf("handle packet %v error: %v", d.ID, d.Err)
+}
+
+func (d PacketHandlerError) Unwrap() error {
+	return d.Err
+}
+
+func (c *Client) handleBundlePackets() (err error) {
+	var packets []pk.Packet
+	for i := 0; i < 4096; i++ {
+		var p pk.Packet
+		// Read packets
+		if err := c.Conn.ReadPacket(&p); err != nil {
+			return err
+		}
+
+		if p.ID == int32(packetid.BundleDelimiter) {
+			// bundle finished
+			goto handlePackets
+		}
+
+		packets = append(packets, p)
+	}
+	return errors.New("packet number of a bundle out of limit")
+
+handlePackets:
+	for i := range packets {
+		if err := c.handlePacket(packets[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *Client) handlePacket(p pk.Packet) (err error) {
+	packetID := packetid.ClientboundPacketID(p.ID)
+	for _, handler := range c.Events.generic {
+		if err = handler.F(p); err != nil {
+			return PacketHandlerError{ID: packetID, Err: err}
+		}
+	}
+	for _, handler := range c.Events.handlers[packetID] {
+		err = handler.F(p)
+		if err != nil {
+			return PacketHandlerError{ID: packetID, Err: err}
+		}
+	}
+	return
+}