diff -r 68443f5be176 -r 44679e468ba9 src/libraries.h
--- a/src/libraries.h	Sat Oct 05 23:47:03 2019 +0300
+++ b/src/libraries.h	Sun Nov 03 12:17:41 2019 +0200
@@ -15,9 +15,12 @@
 	} role;
 	QDir path;
 	static QString libraryRoleName(const Role role);
+	static bool isValidRole(const Role role);
+	constexpr static const Role allRoles[] = {OfficialLibrary, UnofficialLibrary, WorkingLibrary};
 };
 
 Q_DECLARE_METATYPE(Library)
+Q_DECLARE_METATYPE(Library::Role)
 QDataStream &operator<<(QDataStream&, const Library&);
 QDataStream &operator>>(QDataStream&, Library&);
 
@@ -34,12 +37,14 @@
 	QVector<Library>::const_iterator end() const;
 	QFileInfo findFile(QString fileName) const;
 	void addLibrary(const Library& library);
+	void removeLibrary(const int libraryIndex);
 	const Library& library(int libraryIndex) const;
 	void setLibraryPath(int libraryIndex, const QDir& path);
 	void setLibraryRole(int libraryIndex, const Library::Role role);
 	void restoreFromSettings(QSettings* settings);
 	void storeToSettings(QSettings* settings);
 	int count() const;
+	void moveLibrary(const int libraryFromIndex, const int libraryToIndex);
 	// Definitions for QAbstractTableModel
 	Qt::ItemFlags flags(const QModelIndex& index) const override;
 	QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
@@ -47,8 +52,9 @@
 		int section,
 		Qt::Orientation orientation,
 		int role = Qt::DisplayRole) const override;
-	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
-	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+	int rowCount(const QModelIndex&) const override;
+	int columnCount(const QModelIndex&) const override;
+	bool isValidIndex(const int libraryIndex) const;
 private:
 	enum Column
 	{
@@ -56,6 +62,5 @@
 		PathColumn
 	};
 	void signalLibraryChange(int library);
-	bool isValidIndex(int libraryIndex);
 	Libraries libraries;
 };