tag helpers in a separate file and nip10 helpers.

nip10/nip10.go

@@ -0,0 +1,24 @@
+package nip10
+
+import "github.com/nbd-wtf/go-nostr"
+
+func GetThreadRoot(tags nostr.Tags) *nostr.Tag {
+	for _, tag := range tags {
+		if len(tag) >= 4 && tag[0] == "e" && tag[3] == "root" {
+			return &tag
+		}
+	}
+
+	return tags.GetFirst([]string{"e", ""})
+}
+
+func GetImmediateReply(tags nostr.Tags) *nostr.Tag {
+	for i := len(tags) - 1; i >= 0; i-- {
+		tag := tags[i]
+		if len(tag) >= 4 && tag[0] == "e" && tag[3] == "reply" {
+			return &tag
+		}
+	}
+
+	return tags.GetLast([]string{"e", ""})
+}