Refactor: Extract shouldMuteThisNote function

src/misc/should-mute-this-note.ts

@@ -0,0 +1,15 @@
+export default function(note: any, mutedUserIds: string[]): boolean {
+	if (mutedUserIds.indexOf(note.userId) != -1) {
+		return true;
+	}
+
+	if (note.reply != null && mutedUserIds.indexOf(note.reply.userId) != -1) {
+		return true;
+	}
+
+	if (note.renote != null && mutedUserIds.indexOf(note.renote.userId) != -1) {
+		return true;
+	}
+
+	return false;
+}