Add upper-bound to readreceipts_since() and callsites.

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/read_receipt/data.rs

@@ -66,6 +66,7 @@ impl Data {
 		&'a self,
 		room_id: &'a RoomId,
 		since: u64,
+		to: Option<u64>,
 	) -> impl Stream<Item = ReceiptItem<'_>> + Send + 'a {
 		type Key<'a> = (&'a RoomId, u64, &'a UserId);
 		type KeyVal<'a> = (Key<'a>, CanonicalJsonObject);
@@ -76,7 +77,9 @@ impl Data {
 		self.readreceiptid_readreceipt
 			.stream_from(&first_possible_edu)
 			.ignore_err()
-			.ready_take_while(move |((r, ..), _): &KeyVal<'_>| *r == room_id)
+			.ready_take_while(move |((r, c, ..), _): &KeyVal<'_>| {
+				*r == room_id && to.is_none_or(|to| *c <= to)
+			})
 			.map(move |((_, count, user_id), mut json): KeyVal<'_>| {
 				json.remove("room_id");
 

src/service/rooms/read_receipt/mod.rs

@@ -126,8 +126,9 @@ impl Service {
 		&'a self,
 		room_id: &'a RoomId,
 		since: u64,
+		to: Option<u64>,
 	) -> impl Stream<Item = ReceiptItem<'_>> + Send + 'a {
-		self.db.readreceipts_since(room_id, since)
+		self.db.readreceipts_since(room_id, since, to)
 	}
 
 	/// Sets a private read marker at PDU `count`.