(fix) Track File Export: abort if no tracks are selected

Author: ronso0

src/library/export/trackexportwizard.cpp

@@ -14,6 +14,11 @@ void TrackExportWizard::exportTracks() {
 }
 
 bool TrackExportWizard::selectDestinationDirectory() {
+    if (m_tracks.isEmpty()) {
+        qInfo() << "TrackExportWizard: No tracks to export, cancel.";
+        return false;
+    }
+
     QString lastExportDirectory = m_pConfig->getValue(
             ConfigKey("[Library]", "LastTrackCopyDirectory"),
             QStandardPaths::writableLocation(QStandardPaths::MusicLocation));

src/library/trackset/baseplaylistfeature.cpp

@@ -639,6 +639,10 @@ void BasePlaylistFeature::slotExportTrackFiles() {
         tracks.push_back(pTrack);
     }
 
+    if (tracks.isEmpty()) {
+        return;
+    }
+
     TrackExportWizard track_export(nullptr, m_pConfig, tracks);
     track_export.exportTracks();
 }

src/library/trackset/crate/cratefeature.cpp

@@ -854,6 +854,10 @@ void CrateFeature::slotExportTrackFiles() {
         trackpointers.push_back(pTrack);
     }
 
+    if (trackpointers.isEmpty()) {
+        return;
+    }
+
     TrackExportWizard track_export(nullptr, m_pConfig, trackpointers);
     track_export.exportTracks();
 }