clean structure

src/engine/MusicLibrary.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <QObject>
+#include <QList>
+#include <QThread>
+#include <QMutex>
+#include "Track.h"
+
+namespace engine {
+
+class MusicLibrary : public QObject {
+    Q_OBJECT
+public:
+    static const inline QStringList SUPPORTED_EXTS =
+        { "mp3", "flac", "wav", "ogg", "aac", "m4a", "opus", "wma" };
+
+    explicit MusicLibrary(QObject *parent = nullptr);
+    const QList<engine::Track> &tracks() const;
+    const QString      &rootPath() const;
+    void setRootPath(const QString &path);
+    void scan();
+    void sortByArtistTitle();
+    void shutdown();
+
+signals:
+    void scanStarted();
+    void trackFound(const engine::Track &track);
+    void scanComplete(int count);
+
+private:
+    QString       m_root;
+    QList<engine::Track>  m_tracks;
+    QThread      *m_scanThread { nullptr };
+    QMutex        m_mtx;
+};
+
+}