RichPresence: Use class for activity

src/discord/richpresence.cpp

@@ -49,7 +49,6 @@ RichPresence::RichPresence(const SharedPtr<Player> player,
     : QObject(parent),
       player_(player),
       playlist_manager_(playlist_manager),
-      activity_({ {}, {}, {}, 0, 0, 0 }),
       send_presence_timestamp_(0),
       enabled_(false) {
 

src/discord/richpresence.h

@@ -58,14 +58,17 @@ class RichPresence : public QObject {
   const SharedPtr<Player> player_;
   const SharedPtr<PlaylistManager> playlist_manager_;
 
-  struct {
+  class Activity {
+   public:
+    explicit Activity() : start_timestamp(0), length_secs(0), seek_secs(0) {}
     QString title;
     QString artist;
     QString album;
     qint64 start_timestamp;
     qint64 length_secs;
     qint64 seek_secs;
-  } activity_;
+  };
+  Activity activity_;
   qint64 send_presence_timestamp_;
   bool enabled_;
 };