add function to expand addressable events

subgraph.go

@@ -210,3 +210,42 @@ func ExpandReplaceableEvents(e roots.ValidatedEvent, s *EventSubgraph) {
 	s.AddRel(NewIsReplaceableRel(eventNode, rk, nil))
 	s.AddRel(NewForUserRel(rk, authorNode, nil))
 }
+
+func ExpandAddressableEvents(e roots.ValidatedEvent, s *EventSubgraph) {
+	if !(e.Kind() >= 30000 && e.Kind() < 40000) {
+		return
+	}
+
+	eventNode := s.FirstNodeByLabel("Event")
+	if eventNode == nil {
+		return
+	}
+
+	var dTagNodes []*Node
+	for _, n := range s.NodesByLabel("Tag") {
+		if n.Props["name"] == "d" {
+			dTagNodes = append(dTagNodes, n)
+		}
+	}
+	if len(dTagNodes) != 1 {
+		return
+	}
+	dTagNode := dTagNodes[0]
+
+	var authorNode *Node
+	for _, n := range s.NodesByLabel("User") {
+		if n.Props["pubkey"] == e.PubKey() {
+			authorNode = n
+			break
+		}
+	}
+	if authorNode == nil {
+		return
+	}
+
+	rk := NewReplacementKeyNode(e.PubKey(), e.Kind())
+	s.AddNode(rk)
+	s.AddRel(NewIsReplaceableRel(eventNode, rk, nil))
+	s.AddRel(NewForUserRel(rk, authorNode, nil))
+	s.AddRel(NewWithDTagRel(rk, dTagNode, nil))
+}