Add smart playlists, ratings and Qobuz

Fixes #259
Fixes #264

src/smartplaylists/smartplaylistsmodel.h

@@ -0,0 +1,94 @@
+/*
+ * Strawberry Music Player
+ * This code was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2019, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef SMARTPLAYLISTSMODEL_H
+#define SMARTPLAYLISTSMODEL_H
+
+#include "config.h"
+
+#include <QAbstractItemModel>
+#include <QList>
+#include <QVariant>
+#include <QStringList>
+#include <QSettings>
+#include <QIcon>
+
+#include "core/simpletreemodel.h"
+#include "smartplaylistsitem.h"
+#include "playlistgenerator_fwd.h"
+
+class Application;
+class CollectionBackend;
+
+class QModelIndex;
+class QMimeData;
+
+class SmartPlaylistsModel : public SimpleTreeModel<SmartPlaylistsItem> {
+  Q_OBJECT
+
+ public:
+  explicit SmartPlaylistsModel(CollectionBackend *backend, QObject *parent = nullptr);
+  ~SmartPlaylistsModel();
+
+  void Init();
+
+  enum Role {
+    Role_Type = Qt::UserRole + 1,
+    Role_SortText,
+    Role_DisplayText,
+    Role_Smartplaylist,
+    LastRole
+  };
+
+  typedef QList<PlaylistGeneratorPtr> GeneratorList;
+  typedef QList<GeneratorList> DefaultGenerators;
+
+  PlaylistGeneratorPtr CreateGenerator(const QModelIndex &idx) const;
+  void AddGenerator(PlaylistGeneratorPtr gen);
+  void UpdateGenerator(const QModelIndex &idx, PlaylistGeneratorPtr gen);
+  void DeleteGenerator(const QModelIndex &idx);
+
+ private:
+  QVariant data(const QModelIndex &idx, int role = Qt::DisplayRole) const override;
+  QStringList mimeTypes() const override;
+  QMimeData *mimeData(const QModelIndexList &indexes) const override;
+
+ protected:
+  void LazyPopulate(SmartPlaylistsItem *item) override { LazyPopulate(item, true); }
+  void LazyPopulate(SmartPlaylistsItem *item, bool signal);
+
+ private:
+  static const char *kSettingsGroup;
+  static const char *kSmartPlaylistsMimeType;
+  static const int kSmartPlaylistsVersion;
+
+  void SaveGenerator(QSettings *s, const int i, PlaylistGeneratorPtr generator) const;
+  void ItemFromSmartPlaylist(const QSettings &s, const bool notify);
+
+ private:
+  CollectionBackend *backend_;
+  QIcon icon_;
+  DefaultGenerators default_smart_playlists_;
+  QList<SmartPlaylistsItem*> items_;
+
+};
+
+#endif  // SMARTPLAYLISTSMODEL_H