1 files changed, 12 insertions, 1 deletions
diff --git a/src/RoomDirectoryModel.cpp b/src/RoomDirectoryModel.cpp
index 2a06e4d4..b206bf9e 100644
--- a/src/RoomDirectoryModel.cpp
+++ b/src/RoomDirectoryModel.cpp
@@ -4,6 +4,7 @@
 
 #include "RoomDirectoryModel.h"
 #include "ChatPage.h"
+#include "Cache.h"
 
 #include <algorithm>
 
@@ -68,6 +69,16 @@ RoomDirectoryModel::setSearchTerm(const QString &f)
         resetDisplayedData();
 }
 
+
+bool
+RoomDirectoryModel::canJoinRoom(const QByteArray &room)
+{
+	const auto &cache = cache::roomInfo();
+	const QString room_id (room);
+	const bool validRoom = !room_id.isNull() && !room_id.isEmpty();
+	return validRoom && !cache.contains(room_id);
+}
+
 std::vector<std::string>
 RoomDirectoryModel::getViasForRoom(const std::vector<std::string> &aliases)
 {
@@ -174,4 +185,4 @@ RoomDirectoryModel::displayRooms(std::vector<mtx::responses::PublicRoomsChunk> f
         }
 
         prevBatch_ = std::exchange(nextBatch_, next_batch);
-}
\ No newline at end of file
+}