Subsonic API: do not use ffmpeg to remux the files when transcoding is off. fixes #36

src/libs/subsonic/impl/ParameterParsing.hpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2020 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 <Wt/Http/Request.h>
+
+#include "utils/String.hpp"
+#include "SubsonicId.hpp"
+#include "SubsonicResponse.hpp"
+
+namespace API::Subsonic
+{
+
+	template<typename T>
+	std::vector<T>
+	getMultiParametersAs(const Wt::Http::ParameterMap& parameterMap, const std::string& paramName)
+	{
+		std::vector<T> res;
+
+		auto it = parameterMap.find(paramName);
+		if (it == parameterMap.end())
+			return res;
+
+		for (const std::string& param : it->second)
+		{
+			auto value {StringUtils::readAs<T>(param)};
+			if (!value)
+				throw BadParameterFormatGenericError {paramName};
+
+			res.emplace_back(std::move(*value));
+		}
+
+		return res;
+	}
+
+	template<typename T>
+	std::vector<T>
+	getMandatoryMultiParametersAs(const Wt::Http::ParameterMap& parameterMap, const std::string& param)
+	{
+		std::vector<T> res {getMultiParametersAs<T>(parameterMap, param)};
+		if (res.empty())
+			throw RequiredParameterMissingError {};
+
+		return res;
+	}
+
+	template<typename T>
+	std::optional<T>
+	getParameterAs(const Wt::Http::ParameterMap& parameterMap, const std::string& param)
+	{
+		std::vector<T> params {getMultiParametersAs<T>(parameterMap, param)};
+
+		if (params.size() != 1)
+			return {};
+
+		return T { std::move(params.front()) };
+	}
+
+	template<typename T>
+	T
+	getMandatoryParameterAs(const Wt::Http::ParameterMap& parameterMap, const std::string& param)
+	{
+		auto res {getParameterAs<T>(parameterMap, param)};
+		if (!res)
+			throw RequiredParameterMissingError {};
+
+		return *res;
+	}
+
+
+}
+
+namespace StringUtils
+{
+	template<>
+	std::optional<API::Subsonic::Id>
+	StringUtils::readAs(const std::string& str);
+
+	template<>
+	std::optional<bool>
+	StringUtils::readAs(const std::string& str);
+}
+