up3

server/session/handler_interact.go

@@ -0,0 +1,42 @@
+package session
+
+import (
+	"fmt"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// InteractHandler handles the packet.Interact.
+type InteractHandler struct{}
+
+// Handle ...
+func (h *InteractHandler) Handle(p packet.Packet, s *Session, _ *world.Tx, c Controllable) error {
+	pk := p.(*packet.Interact)
+	pos := c.Position()
+
+	switch pk.ActionType {
+	case packet.InteractActionMouseOverEntity:
+		// We don't need this action.
+	case packet.InteractActionOpenInventory:
+		if s.invOpened {
+			// When there is latency, this might end up being sent multiple times. If we send a ContainerOpen
+			// multiple times, the client crashes.
+			return nil
+		}
+		s.invOpened = true
+		s.writePacket(&packet.ContainerOpen{
+			WindowID:                0,
+			ContainerType:           0xff,
+			ContainerEntityUniqueID: -1,
+			ContainerPosition: protocol.BlockPos{
+				int32(pos[0]),
+				int32(pos[1]),
+				int32(pos[2]),
+			},
+		})
+	default:
+		return fmt.Errorf("unexpected interact packet action %v", pk.ActionType)
+	}
+	return nil
+}