1 files changed, 15 insertions, 0 deletions
diff --git a/packages/backend/src/misc/is-user-related.ts b/packages/backend/src/misc/is-user-related.ts
new file mode 100644
index 0000000000..e6bbdb5d35
--- /dev/null
+++ b/packages/backend/src/misc/is-user-related.ts
@@ -0,0 +1,15 @@
+export function isUserRelated(note: any, userIds: Set<string>): boolean {
+	if (userIds.has(note.userId)) {
+		return true;
+	}
+
+	if (note.reply != null && userIds.has(note.reply.userId)) {
+		return true;
+	}
+
+	if (note.renote != null && userIds.has(note.renote.userId)) {
+		return true;
+	}
+
+	return false;
+}