SmartPlaylists: Add option to restore smart playlists to the defaults

Fixes #1848

src/smartplaylists/smartplaylistsmodel.cpp

@@ -134,13 +134,10 @@ void SmartPlaylistsModel::Init() {
 
     // Append the new ones
     s.beginWriteArray(collection_backend_->songs_table(), playlist_index + unwritten_defaults);
-    for (; version < default_smart_playlists_.count(); ++version) {
-      const GeneratorList generators = default_smart_playlists_.value(version);
-      for (PlaylistGeneratorPtr gen : generators) {
-        SaveGenerator(&s, playlist_index++, gen);
-      }
-    }
+    WriteDefaultsToSettings(&s, version, playlist_index);
     s.endArray();
+
+    version = default_smart_playlists_.count();
   }
 
   s.setValue(collection_backend_->songs_table() + u"_version"_s, version);
@@ -269,6 +266,46 @@ PlaylistGeneratorPtr SmartPlaylistsModel::CreateGenerator(const QModelIndex &idx
 
 }
 
+void SmartPlaylistsModel::WriteDefaultsToSettings(Settings *s, const int start_version, const int start_index) {
+
+  int playlist_index = start_index;
+  for (int version = start_version; version < default_smart_playlists_.count(); ++version) {
+    const GeneratorList generators = default_smart_playlists_.value(version);
+    for (PlaylistGeneratorPtr gen : generators) {
+      SaveGenerator(s, playlist_index++, gen);
+    }
+  }
+
+}
+
+void SmartPlaylistsModel::RestoreDefaults() {
+
+  root_->ClearNotify();
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+
+  int total_defaults = 0;
+  for (const GeneratorList &generators : default_smart_playlists_) {
+    total_defaults += static_cast<int>(generators.count());
+  }
+
+  s.beginWriteArray(collection_backend_->songs_table(), total_defaults);
+  WriteDefaultsToSettings(&s, 0, 0);
+  s.endArray();
+
+  s.setValue(collection_backend_->songs_table() + u"_version"_s, default_smart_playlists_.count());
+
+  const int count = s.beginReadArray(collection_backend_->songs_table());
+  for (int i = 0; i < count; ++i) {
+    s.setArrayIndex(i);
+    ItemFromSmartPlaylist(s, true);
+  }
+  s.endArray();
+  s.endGroup();
+
+}
+
 QVariant SmartPlaylistsModel::data(const QModelIndex &idx, const int role) const {
 
   if (!idx.isValid()) return QVariant();

src/smartplaylists/smartplaylistsmodel.h

@@ -66,6 +66,7 @@ class SmartPlaylistsModel : public SimpleTreeModel<SmartPlaylistsItem> {
   void AddGenerator(PlaylistGeneratorPtr gen);
   void UpdateGenerator(const QModelIndex &idx, PlaylistGeneratorPtr gen);
   void DeleteGenerator(const QModelIndex &idx);
+  void RestoreDefaults();
 
  private:
   QVariant data(const QModelIndex &idx, int role = Qt::DisplayRole) const override;
@@ -79,6 +80,7 @@ class SmartPlaylistsModel : public SimpleTreeModel<SmartPlaylistsItem> {
 
   static void SaveGenerator(Settings *s, const int i, PlaylistGeneratorPtr generator);
   void ItemFromSmartPlaylist(const Settings &s, const bool notify);
+  void WriteDefaultsToSettings(Settings *s, const int start_version, const int start_index);
 
  private:
   SharedPtr<CollectionBackend> collection_backend_;

src/smartplaylists/smartplaylistsviewcontainer.cpp

@@ -60,6 +60,7 @@ SmartPlaylistsViewContainer::SmartPlaylistsViewContainer(const SharedPtr<Player>
       action_new_smart_playlist_(nullptr),
       action_edit_smart_playlist_(nullptr),
       action_delete_smart_playlist_(nullptr),
+      action_restore_defaults_(nullptr),
       action_append_to_playlist_(nullptr),
       action_replace_current_playlist_(nullptr),
       action_open_in_new_playlist_(nullptr),
@@ -74,6 +75,7 @@ SmartPlaylistsViewContainer::SmartPlaylistsViewContainer(const SharedPtr<Player>
   model_->Init();
 
   action_new_smart_playlist_ = context_menu_->addAction(IconLoader::Load(u"document-new"_s), tr("New smart playlist..."), this, &SmartPlaylistsViewContainer::NewSmartPlaylist);
+  action_restore_defaults_ = context_menu_->addAction(IconLoader::Load(u"view-refresh"_s), tr("Restore defaults"), this, &SmartPlaylistsViewContainer::RestoreDefaultsFromContext);
 
   action_append_to_playlist_ = context_menu_selected_->addAction(IconLoader::Load(u"media-playback-start"_s), tr("Append to current playlist"), this, &SmartPlaylistsViewContainer::AppendToPlaylist);
   action_replace_current_playlist_ = context_menu_selected_->addAction(IconLoader::Load(u"media-playback-start"_s), tr("Replace current playlist"), this, &SmartPlaylistsViewContainer::ReplaceCurrentPlaylist);
@@ -90,13 +92,16 @@ SmartPlaylistsViewContainer::SmartPlaylistsViewContainer(const SharedPtr<Player>
   action_delete_smart_playlist_ = context_menu_selected_->addAction(IconLoader::Load(u"edit-delete"_s), tr("Delete smart playlist"), this, &SmartPlaylistsViewContainer::DeleteSmartPlaylistFromContext);
 
   context_menu_selected_->addSeparator();
+  context_menu_selected_->addAction(action_restore_defaults_);
 
   ui_->new_->setDefaultAction(action_new_smart_playlist_);
   ui_->edit_->setIcon(IconLoader::Load(u"edit-rename"_s));
   ui_->delete_->setIcon(IconLoader::Load(u"edit-delete"_s));
+  ui_->restore_->setIcon(IconLoader::Load(u"view-refresh"_s));
 
   QObject::connect(ui_->edit_, &QToolButton::clicked, this, &SmartPlaylistsViewContainer::EditSmartPlaylistFromButton);
   QObject::connect(ui_->delete_, &QToolButton::clicked, this, &SmartPlaylistsViewContainer::DeleteSmartPlaylistFromButton);
+  QObject::connect(ui_->restore_, &QToolButton::clicked, this, &SmartPlaylistsViewContainer::RestoreDefaults);
 
   QObject::connect(ui_->view, &SmartPlaylistsView::ItemsSelectedChanged, this, &SmartPlaylistsViewContainer::ItemsSelectedChanged);
   QObject::connect(ui_->view, &SmartPlaylistsView::doubleClicked, this, &SmartPlaylistsViewContainer::ItemDoubleClicked);
@@ -130,6 +135,7 @@ void SmartPlaylistsViewContainer::ReloadSettings() {
   ui_->new_->setIconSize(QSize(iconsize, iconsize));
   ui_->delete_->setIconSize(QSize(iconsize, iconsize));
   ui_->edit_->setIconSize(QSize(iconsize, iconsize));
+  ui_->restore_->setIconSize(QSize(iconsize, iconsize));
 
 }
 
@@ -304,3 +310,15 @@ void SmartPlaylistsViewContainer::ItemDoubleClicked(const QModelIndex &idx) {
   Q_EMIT AddToPlaylist(q_mimedata);
 
 }
+
+void SmartPlaylistsViewContainer::RestoreDefaultsFromContext() {
+
+  RestoreDefaults();
+
+}
+
+void SmartPlaylistsViewContainer::RestoreDefaults() {
+
+  model_->RestoreDefaults();
+
+}

src/smartplaylists/smartplaylistsviewcontainer.h

@@ -83,11 +83,13 @@ class SmartPlaylistsViewContainer : public QWidget {
 
   void EditSmartPlaylist(const QModelIndex &idx);
   void DeleteSmartPlaylist(const QModelIndex &idx);
+  void RestoreDefaults();
 
   void EditSmartPlaylistFromButton();
   void DeleteSmartPlaylistFromButton();
   void EditSmartPlaylistFromContext();
   void DeleteSmartPlaylistFromContext();
+  void RestoreDefaultsFromContext();
 
   void NewSmartPlaylistFinished();
   void EditSmartPlaylistFinished();
@@ -113,6 +115,7 @@ class SmartPlaylistsViewContainer : public QWidget {
   QAction *action_new_smart_playlist_;
   QAction *action_edit_smart_playlist_;
   QAction *action_delete_smart_playlist_;
+  QAction *action_restore_defaults_;
   QAction *action_append_to_playlist_;
   QAction *action_replace_current_playlist_;
   QAction *action_open_in_new_playlist_;

src/smartplaylists/smartplaylistsviewcontainer.ui

@@ -95,6 +95,19 @@
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="QToolButton" name="restore_">
+        <property name="toolTip">
+         <string>Restore defaults</string>
+        </property>
+        <property name="iconSize">
+         <size>
+          <width>22</width>
+          <height>22</height>
+         </size>
+        </property>
+       </widget>
+      </item>
       <item>
        <spacer name="spacer_buttons">
         <property name="orientation">