save

src/librssguard/database/databasefactory.cpp

@@ -5,6 +5,7 @@
 #include "3rd-party/boolinq/boolinq.h"
 #include "database/mariadbdriver.h"
 #include "database/sqlitedriver.h"
+#include "exceptions/applicationexception.h"
 #include "gui/messagebox.h"
 #include "miscellaneous/application.h"
 #include "miscellaneous/iofactory.h"
@@ -43,6 +44,29 @@ void DatabaseFactory::determineDriver() {
   if (m_dbDriver == nullptr) {
     qFatal("DB driver for '%s' was not found.", qPrintable(db_driver));
   }
+
+  if (m_dbDriver->driverType() != DatabaseDriver::DriverType::SQLite) {
+    // Try to setup connection and fallback to SQLite.
+    try {
+      m_dbDriver->connection(metaObject()->className());
+    }
+    catch (const ApplicationException& ex) {
+      qCriticalNN << LOGSEC_DB
+                  << "Failed to reach connection to DB source, will fallback to SQLite:"
+                  << QUOTE_W_SPACE_DOT(ex.message());
+
+      qApp->showGuiMessage(tr("Cannot connect to database"),
+                           tr("Connection to your database was not established with error '%1'. "
+                              "Falling back to SQLite.").arg(ex.message()),
+                           QSystemTrayIcon::MessageIcon::Critical,
+                           nullptr,
+                           true);
+
+      m_dbDriver = boolinq::from(m_allDbDrivers).first([](DatabaseDriver* driv) {
+        return driv->driverType() == DatabaseDriver::DriverType::SQLite;
+      });
+    }
+  }
 }
 
 DatabaseDriver* DatabaseFactory::driver() const {