Cleanup and optimize several user_can conditions.

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

src/service/rooms/state_accessor/user_can.rs

@@ -92,12 +92,6 @@ pub async fn user_can_see_event(
 		return true;
 	};
 
-	let currently_member = self
-		.services
-		.state_cache
-		.is_joined(user_id, room_id)
-		.await;
-
 	let history_visibility = self
 		.state_get_content(shortstatehash, &StateEventType::RoomHistoryVisibility, "")
 		.await
@@ -106,18 +100,23 @@ pub async fn user_can_see_event(
 		});
 
 	match history_visibility {
-		| HistoryVisibility::Invited => {
-			// Allow if any member on requesting server was AT LEAST invited, else deny
-			self.user_was_invited(shortstatehash, user_id)
-				.await
-		},
-		| HistoryVisibility::Joined => {
-			// Allow if any member on requested server was joined, else deny
-			self.user_was_joined(shortstatehash, user_id)
-				.await
-		},
 		| HistoryVisibility::WorldReadable => true,
-		| HistoryVisibility::Shared | _ => currently_member,
+
+		// Allow if any member on requesting server was AT LEAST invited, else deny
+		| HistoryVisibility::Invited =>
+			self.user_was_invited(shortstatehash, user_id)
+				.await,
+
+		// Allow if any member on requested server was joined, else deny
+		| HistoryVisibility::Joined =>
+			self.user_was_joined(shortstatehash, user_id)
+				.await,
+
+		| HistoryVisibility::Shared | _ =>
+			self.services
+				.state_cache
+				.is_joined(user_id, room_id)
+				.await,
 	}
 }
 
@@ -144,16 +143,19 @@ pub async fn user_can_see_state_events(&self, user_id: &UserId, room_id: &RoomId
 
 	match history_visibility {
 		| HistoryVisibility::WorldReadable => true,
-		| HistoryVisibility::Shared =>
+
-			self.services
-				.state_cache
-				.once_joined(user_id, room_id)
-				.await,
 		| HistoryVisibility::Invited =>
 			self.services
 				.state_cache
 				.is_invited(user_id, room_id)
 				.await,
+
+		| HistoryVisibility::Shared =>
+			self.services
+				.state_cache
+				.once_joined(user_id, room_id)
+				.await,
+
 		| _ => false,
 	}
 }