Added an option for the user to choice the type of the similarity engine to use

src/ui/common/ValueStringModel.hpp

@@ -0,0 +1,78 @@
+
+/*
+ * Copyright (C) 2019 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <boost/optional.hpp>
+#include <Wt/WStringListModel.h>
+
+namespace UserInterface {
+
+// Helper class
+template <typename T>
+class ValueStringModel : public Wt::WStringListModel
+{
+	public:
+
+		T getValue(std::size_t row)
+		{
+			return Wt::cpp17::any_cast<T>(data(index(static_cast<int>(row), 0), Wt::ItemDataRole::User));
+		}
+
+		Wt::WString getString(std::size_t row)
+		{
+			return Wt::cpp17::any_cast<Wt::WString>(data(index(static_cast<int>(row), 0), Wt::ItemDataRole::Display));
+		}
+
+		boost::optional<std::size_t>
+		getRowFromString(const Wt::WString& value)
+		{
+			for (std::size_t i{}; i < static_cast<std::size_t>(rowCount()); ++i)
+			{
+				if (getString(i) == value)
+					return i;
+			}
+
+			return boost::none;
+		}
+
+		boost::optional<std::size_t>
+		getRowFromValue(const T& value)
+		{
+			for (std::size_t i{}; i < static_cast<std::size_t>(rowCount()); ++i)
+			{
+				if (getValue(i) == value)
+					return i;
+			}
+
+			return boost::none;
+		}
+
+		void
+		add(const Wt::WString& str, const T& value)
+		{
+			insertRows(rowCount(), 1);
+			setData(rowCount() - 1, 0, value, Wt::ItemDataRole::User);
+			setData(rowCount() - 1, 0, str, Wt::ItemDataRole::Display);
+		}
+
+};
+
+} // namespace UserInterface