up3

server/session/handler_player_action.go

@@ -0,0 +1,63 @@
+package session
+
+import (
+	"fmt"
+
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// PlayerActionHandler handles the PlayerAction packet.
+type PlayerActionHandler struct{}
+
+// Handle ...
+func (*PlayerActionHandler) Handle(p packet.Packet, s *Session, _ *world.Tx, c Controllable) error {
+	pk := p.(*packet.PlayerAction)
+
+	return handlePlayerAction(pk.ActionType, pk.BlockFace, pk.BlockPosition, pk.EntityRuntimeID, s, c)
+}
+
+// handlePlayerAction handles an action performed by a player, found in packet.PlayerAction and packet.PlayerAuthInput.
+func handlePlayerAction(action int32, face int32, pos protocol.BlockPos, entityRuntimeID uint64, s *Session, c Controllable) error {
+	if entityRuntimeID != selfEntityRuntimeID {
+		return errSelfRuntimeID
+	}
+	switch action {
+	case protocol.PlayerActionStartSleeping, protocol.PlayerActionRespawn, protocol.PlayerActionDimensionChangeDone:
+		// Don't do anything for these actions.
+	case protocol.PlayerActionStopSleeping:
+		c.Wake()
+	case protocol.PlayerActionStartBreak, protocol.PlayerActionContinueDestroyBlock:
+		s.swingingArm.Store(true)
+		defer s.swingingArm.Store(false)
+
+		s.breakingPos = cube.Pos{int(pos[0]), int(pos[1]), int(pos[2])}
+		c.StartBreaking(s.breakingPos, cube.Face(face))
+	case protocol.PlayerActionAbortBreak:
+		c.AbortBreaking()
+	case protocol.PlayerActionPredictDestroyBlock, protocol.PlayerActionStopBreak:
+		s.swingingArm.Store(true)
+		defer s.swingingArm.Store(false)
+		c.FinishBreaking()
+	case protocol.PlayerActionCrackBreak:
+		// Don't do anything for this action. It is no longer used. Block
+		// cracking is done fully server-side.
+	case protocol.PlayerActionStartItemUseOn:
+		// TODO: Properly utilize these actions.
+	case protocol.PlayerActionStopItemUseOn:
+		c.ReleaseItem()
+	case protocol.PlayerActionStartBuildingBlock:
+		// Don't do anything for this action.
+	case protocol.PlayerActionCreativePlayerDestroyBlock:
+		// Don't do anything for this action.
+	case protocol.PlayerActionMissedSwing:
+		s.swingingArm.Store(true)
+		defer s.swingingArm.Store(false)
+		c.PunchAir()
+	default:
+		return fmt.Errorf("unhandled ActionType %v", action)
+	}
+	return nil
+}