Added authentication backends: internal, pam and http-headers. fixes #119

src/libs/utils/include/utils/IConfig.hpp

@@ -18,9 +18,8 @@
  */
 #pragma once
 
+#include <string_view>
 #include <filesystem>
-#include <memory>
-#include <unordered_set>
 
 // Used to get config values from configuration files
 class IConfig
@@ -30,11 +29,11 @@ class IConfig
 		virtual ~IConfig() = default;
 
 		// Default values are returned in case of setting not found
-		virtual std::string	getString(const std::string& setting, const std::string& def = "", const std::unordered_set<std::string>& allowedValues = {}) = 0;
-		virtual std::filesystem::path getPath(const std::string& setting, const std::filesystem::path& def = std::filesystem::path()) = 0;
-		virtual unsigned long	getULong(const std::string& setting, unsigned long def = 0) = 0;
-		virtual long		getLong(const std::string& setting, long def = 0) = 0;
-		virtual bool		getBool(const std::string& setting, bool def = false) = 0;
+		virtual std::string_view		getString(std::string_view setting, std::string_view def = "") = 0;
+		virtual std::filesystem::path	getPath(std::string_view setting, const std::filesystem::path& def = std::filesystem::path()) = 0;
+		virtual unsigned long	getULong(std::string_view setting, unsigned long def = 0) = 0;
+		virtual long		getLong(std::string_view setting, long def = 0) = 0;
+		virtual bool		getBool(std::string_view setting, bool def = false) = 0;
 };
 
 

src/libs/utils/include/utils/RecursiveSharedMutex.hpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2021 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 <mutex>
+#include <shared_mutex>
+#include <thread>
+#include <unordered_map>
+
+// API compatible with shared_mutex
+class RecursiveSharedMutex
+{
+	public:
+		void lock();
+		void unlock();
+
+		void lock_shared();
+		void unlock_shared();
+
+	private:
+		std::shared_mutex _mutex;
+		std::thread::id _uniqueOwner;
+		std::size_t _uniqueCount{};
+
+		std::mutex _sharedCountMutex;
+		std::unordered_map<std::thread::id, std::size_t> _sharedCounts;
+};
+

src/libs/utils/include/utils/Service.hpp

@@ -26,6 +26,7 @@ template <typename Class>
 class Service
 {
 	public:
+		Service() = default;
 		Service(std::unique_ptr<Class> service)
 		{
 			assign(std::move(service));
@@ -52,14 +53,17 @@ class Service
 		}
 
 		static Class* get() { return _service.get(); }
+		static bool exists() { return _service.get(); }
 
-	private:
-		static Class& assign(std::unique_ptr<Class> service)
+		template <typename SubClass>
+		static Class& assign(std::unique_ptr<SubClass> service)
 		{
 			assert(!_service);
 			_service = std::move(service);
 			return *get();
 		}
+
+	private:
 		static void clear() { _service.reset(); }
 
 		static inline std::unique_ptr<Class> _service;