Lower the priority if a transport fails to also try others eventually

libnymea-app/connection/nymeaconnection.cpp

@@ -271,6 +271,7 @@ void NymeaConnection::onError(QAbstractSocket::SocketError error)
     if (!m_currentTransport) {
         // We're trying to connect and one of the transports failed...
         if (m_transportCandidates.contains(transport)) {
+            m_transportCandidates.value(transport)->decreasePriority();
             m_transportCandidates.remove(transport);
             transport->deleteLater();
         }

libnymea-app/connection/nymeahost.cpp

@@ -326,7 +326,7 @@ void Connection::setManual(bool manual)
 
 int Connection::priority() const
 {
-    int prio = 0;
+    int prio = m_manualPriorityAdjust;
     if (m_online) {
         prio += 1000;
         prio -= qMin(500, (int)m_lastSeen.secsTo(QDateTime::currentDateTime()));
@@ -359,3 +359,13 @@ int Connection::priority() const
     }
     return prio;
 }
+
+void Connection::increasePriority()
+{
+    m_manualPriorityAdjust++;
+}
+
+void Connection::decreasePriority()
+{
+    m_manualPriorityAdjust--;
+}

libnymea-app/connection/nymeahost.h

@@ -78,6 +78,8 @@ public:
     bool manual() const;
     void setManual(bool manual);
     int priority() const;
+    void increasePriority();
+    void decreasePriority();
 
 signals:
     void onlineChanged();
@@ -91,6 +93,7 @@ private:
     bool m_online = false;
     bool m_manual = false;
     QDateTime m_lastSeen;
+    int m_manualPriorityAdjust = 0;
 };
 
 class Connections: public QAbstractListModel