1 files changed, 31 insertions, 0 deletions
diff --git a/packages/backend/src/misc/is-renote.ts b/packages/backend/src/misc/is-renote.ts
index 5d48aba360..48f821806c 100644
--- a/packages/backend/src/misc/is-renote.ts
+++ b/packages/backend/src/misc/is-renote.ts
@@ -4,6 +4,7 @@
  */
 
 import type { MiNote } from '@/models/Note.js';
+import type { Packed } from '@/misc/json-schema.js';
 
 type Renote =
 	MiNote & {
@@ -34,3 +35,33 @@ export function isQuote(note: Renote): note is Quote {
 		note.hasPoll ||
 		note.fileIds.length > 0;
 }
+
+type PackedRenote =
+	Packed<'Note'> & {
+		renoteId: NonNullable<Packed<'Note'>['renoteId']>
+	};
+
+type PackedQuote =
+	PackedRenote & ({
+		text: NonNullable<Packed<'Note'>['text']>
+	} | {
+		cw: NonNullable<Packed<'Note'>['cw']>
+	} | {
+		replyId: NonNullable<Packed<'Note'>['replyId']>
+	} | {
+		poll: NonNullable<Packed<'Note'>['poll']>
+	} | {
+		fileIds: NonNullable<Packed<'Note'>['fileIds']>
+	});
+
+export function isRenotePacked(note: Packed<'Note'>): note is PackedRenote {
+	return note.renoteId != null;
+}
+
+export function isQuotePacked(note: PackedRenote): note is PackedQuote {
+	return note.text != null ||
+		note.cw != null ||
+		note.replyId != null ||
+		note.poll != null ||
+		(note.fileIds != null && note.fileIds.length > 0);
+}