create backup only when receiver found

include/TransferState.hpp

@@ -11,14 +11,16 @@ struct TransferState {
     std::atomic<uint64_t> bytes_total{0};
 
     std::string    status;
+    std::string    fail_reason;
     mutable std::mutex status_mutex;
 
     void reset() {
-        done             = false;
-        cancelled        = false;
+        done              = false;
+        cancelled         = false;
         connection_failed = false;
-        bytes_done       = 0;
-        bytes_total      = 0;
+        bytes_done        = 0;
+        bytes_total       = 0;
+        fail_reason.clear();
         std::lock_guard<std::mutex> lock(status_mutex);
         status.clear();
     }

include/client.hpp

@@ -1,12 +1,11 @@
-#include <filesystem>
 #include <string>
-namespace fs = std::filesystem;
-using path = fs::path;
+#include <switch.h>
 
-int transfer_files(path directory);
+int transfer_files(size_t index, AccountUid uid);
 bool isClientTransferDone();
 bool isClientTransferCancelled();
 bool isClientConnectionFailed();
 void cancelClientTransfer();
 double getClientProgress();
 std::string getClientStatusText();
+std::string getClientFailReason();