Config.h

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef UTILS_CONFIG_H
#define UTILS_CONFIG_H
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
namespace CLI {
    class App;
    class Option;
    class Formatter;
} // namespace CLI
 
#include <map>
#include <memory>
#include <string>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace utils {
 
    class Config {
    public:
        Config() = delete;
        Config(const Config&) = delete;
        ~Config() = delete;
 
        Config& operator=(const Config&) = delete;
 
        static bool init(int argc, char* argv[]);
        static bool bootstrap();
        static void terminate();
 
        static CLI::App* addInstance(const std::string& name, const std::string& description, const std::string& group);
        static bool removeInstance(CLI::App* instance);
 
        static void required(CLI::App* instance, bool reqired = true);
        static void disabled(CLI::App* instance, bool disabled = true);
 
        static CLI::App* addStandardFlags(CLI::App* app);
        static CLI::App* addSimpleHelp(CLI::App* app);
        static CLI::App* addHelp(CLI::App* app);
 
        static std::string getApplicationName();
        static int getLogLevel();
        static int getVerboseLevel();
 
        static CLI::Option* addStringOption(const std::string& name, const std::string& description, const std::string& typeName);
 
        static CLI::Option*
        addStringOption(const std::string& name, const std::string& description, const std::string& typeName, bool configurable);
 
        static CLI::Option* addStringOption(const std::string& name,
                                            const std::string& description,
                                            const std::string& typeName,
                                            const std::string& defaultValue);
 
        static CLI::Option* addStringOption(const std::string& name,
                                            const std::string& description,
                                            const std::string& typeName,
                                            const std::string& defaultValue,
                                            bool configurable);
 
        static CLI::Option*
        addStringOption(const std::string& name, const std::string& description, const std::string& typeName, const char* defaultValue);
 
        static CLI::Option* addStringOption(const std::string& name,
                                            const std::string& description,
                                            const std::string& typeName,
                                            const char* defaultValue,
                                            bool configurable);
 
        static std::string getStringOptionValue(const std::string& name);
 
        static void addFlag(const std::string& name,
                            bool& variable,
                            const std::string& description,
                            bool required,
                            bool configurable = true,
                            const std::string& groupName = "Application Options");
 
    private:
        static bool parse1();
        static bool parse2();
 
        static std::shared_ptr<CLI::App> app;
        static std::shared_ptr<CLI::Formatter> sectionFormatter;
 
        static int argc;
        static char** argv;
 
        static std::string applicationName;
 
        static std::string configDirectory;
        static std::string logDirectory;
        static std::string pidDirectory;
 
        static CLI::Option* daemonizeOpt;
        static CLI::Option* logFileOpt;
        static CLI::Option* userNameOpt;
        static CLI::Option* groupNameOpt;
        static CLI::Option* enforceLogFileOpt;
        static CLI::Option* logLevelOpt;
        static CLI::Option* verboseLevelOpt;
        static CLI::Option* quietOpt;
 
        static std::map<std::string, std::string> aliases;             // from -> to
        static std::map<std::string, CLI::Option*> applicationOptions; // keep all user options in memory
    };
 
} // namespace utils
 
#endif // UTILS_CONFIG_H