Fixed networking flush algorithm for the file transfer

file/local_server/LocalFileTransferClientWorker.cpp

@@ -67,6 +67,26 @@ void LocalFileTransfer::disconnect_client(const std::shared_ptr<FileClient> &cli
 #undef del_ev_noblock
 }
 
+void LocalFileTransfer::test_disconnecting_state(const std::shared_ptr<FileClient> &client) {
+    if(client->state != FileClient::STATE_DISCONNECTING)
+        return;
+
+    {
+        std::lock_guard db_lock{client->disk_buffer.mutex};
+        std::lock_guard nb_lock{client->network_buffer.mutex};
+
+        if(client->disk_buffer.bytes > 0)
+            return;
+
+        if(client->network_buffer.bytes > 0)
+            return;
+    }
+
+    debugMessage(LOG_FT, "{} Disk and network buffers are flushed.", client->log_prefix());
+    std::unique_lock s_lock{client->state_mutex};
+    this->disconnect_client(client, s_lock, false);
+}
+
 void LocalFileTransfer::dispatch_loop_client_worker(void *ptr_transfer) {
     auto provider = reinterpret_cast<LocalFileTransfer*>(ptr_transfer);