up3

server/session/view_layer.go

@@ -0,0 +1,73 @@
+package session
+
+import "github.com/df-mc/dragonfly/server/world"
+
+// ViewLayer returns the session's ViewLayer. The layer may be used to override how entities are viewed
+// by this session, such as with a different name tag or visibility state.
+func (s *Session) ViewLayer() *world.ViewLayer {
+	return s.viewLayer
+}
+
+// ViewNameTag overwrites the public name tag of the entity and immediately refreshes it for this session.
+func (s *Session) ViewNameTag(entity world.Entity, nameTag string) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.ViewNameTag(entity, nameTag)
+}
+
+// ViewPublicNameTag removes the name tag override from the entity and immediately refreshes it for this session.
+func (s *Session) ViewPublicNameTag(entity world.Entity) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.ViewPublicNameTag(entity)
+}
+
+// ViewScoreTag overwrites the public score tag of the entity and immediately refreshes it for this session.
+func (s *Session) ViewScoreTag(entity world.Entity, scoreTag string) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.ViewScoreTag(entity, scoreTag)
+}
+
+// ViewPublicScoreTag removes the score tag override from the entity and immediately refreshes it for this session.
+func (s *Session) ViewPublicScoreTag(entity world.Entity) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.ViewPublicScoreTag(entity)
+}
+
+// ViewVisibility overwrites the public visibility of the entity and immediately refreshes it for this session.
+func (s *Session) ViewVisibility(entity world.Entity, level world.VisibilityLevel) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.ViewVisibility(entity, level)
+}
+
+// RemoveViewLayer removes all overrides for the entity and immediately refreshes it for this session.
+func (s *Session) RemoveViewLayer(entity world.Entity) {
+	if s.viewLayer == nil {
+		return
+	}
+	s.viewLayer.Remove(entity)
+}
+
+// ViewLayerEntityChanged refreshes the entity metadata for this session if the entity is currently visible.
+func (s *Session) ViewLayerEntityChanged(e world.Entity) {
+	if s.entityHidden(e) || !s.viewingEntity(e.H()) {
+		return
+	}
+	s.ViewEntityState(e)
+}
+
+// viewingEntity checks if this session currently has a runtime ID assigned to the entity handle.
+func (s *Session) viewingEntity(handle *world.EntityHandle) bool {
+	s.entityMutex.RLock()
+	_, ok := s.entityRuntimeIDs[handle]
+	s.entityMutex.RUnlock()
+	return ok
+}