No need to pass Application to RadioBackend

src/radios/radiobackend.cpp

@@ -22,15 +22,13 @@
 #include <QMutexLocker>
 
 #include "core/logging.h"
-#include "core/application.h"
 #include "core/database.h"
 #include "core/song.h"
 #include "radiobackend.h"
 #include "radiochannel.h"
 
-RadioBackend::RadioBackend(Application *app, Database *db, QObject *parent)
+RadioBackend::RadioBackend(Database *db, QObject *parent)
     : QObject(parent),
-      app_(app),
       db_(db),
       original_thread_(thread()) {}
 

src/radios/radiobackend.h

@@ -24,14 +24,13 @@
 
 #include "radiochannel.h"
 
-class Application;
 class Database;
 
 class RadioBackend : public QObject {
   Q_OBJECT
 
  public:
-  explicit RadioBackend(Application *app, Database *db, QObject *parent = nullptr);
+  explicit RadioBackend(Database *db, QObject *parent = nullptr);
 
   void Close();
   void ExitAsync();
@@ -53,7 +52,6 @@ class RadioBackend : public QObject {
   void Exit();
 
  private:
-  Application *app_;
   Database *db_;
   QThread *original_thread_;
 };

src/radios/radioservices.cpp

@@ -38,7 +38,7 @@ RadioServices::RadioServices(Application *app, QObject *parent)
       model_(new RadioModel(app, this)),
       channels_refresh_(false) {
 
-  backend_ = new RadioBackend(app, app->database());
+  backend_ = new RadioBackend(app->database());
   app->MoveToThread(backend_, app->database()->thread());
 
   QObject::connect(backend_, &RadioBackend::NewChannels, this, &RadioServices::GotChannelsFromBackend);