148 lines
3.9 KiB
C++
148 lines
3.9 KiB
C++
/* This file is part of FediPotato.
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* Copyright © 2020 tastytea <tastytea@tastytea.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FEDIPOTATO_CONFIG_HPP
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#define FEDIPOTATO_CONFIG_HPP
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#include "directories.hpp"
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#include <nlohmann/json.hpp>
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#if __has_include(<filesystem>)
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# include <filesystem>
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#else
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# include <experimental/filesystem>
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#endif
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#include <string>
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#include <string_view>
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namespace FediPotato
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{
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using json = nlohmann::json;
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namespace fs = std::filesystem;
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using std::string;
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using std::string_view;
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/*!
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* @brief Read and write the configuration.
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*
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* @throw std::runtime_error Directory not found.
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* @throw std::filesystem::filesystem_error Could not create directory.
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* @throw std::ifstream::failure Could not read from file.
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* @throw std::ofstream::failure Could not write to file.
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* @throw nlohmann::detail::parse_error Could not parse file.
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* @throw nlohmann::detail::type_error Setting not found / Wrong type.
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*
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* @since 0.1.0
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*
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* @headerfile config.hpp FediPotato/config.hpp
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*/
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class Config
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{
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public:
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/*!
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* @brief Construct a Config object.
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*
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* @param application_name The name of your application.
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* @param filename The filename to open.
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*
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* @throw std::runtime_error Directory not found.
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* @throw std::filesystem::filesystem_error Could not create directory.
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*
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* @since 0.1.0
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*/
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explicit Config(const string_view application_name,
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const string_view filename)
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: _filename{filename}
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, _filepath{Directories(application_name).config() /= filename}
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{
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read();
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}
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//! Copy constructor
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Config(const Config &other) = default;
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//! Move constructor
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Config(Config &&other) noexcept = default;
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//! Destructor
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virtual ~Config() noexcept = default;
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//! Copy assignment operator
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Config& operator=(const Config &other) = delete;
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//! Move assignment operator
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Config& operator=(Config &&other) noexcept = delete;
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public:
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/*!
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* @brief Read and parse the configuration from file.
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*
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* @throw std::ifstream::failure Could not read from file.
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* @throw nlohmann::detail::parse_error Could not parse file.
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*
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* @since 0.1.0
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*/
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void read();
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/*!
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* @brief Write configuration to file.
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*
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* @since 0.1.0
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*/
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void write() const;
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/*!
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* @brief Set a configuration setting.
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*
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* @param key The key of the setting.
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* @param value The value of the setting.
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*
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* @throw std::ofstream::failure Could not write to file.
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*
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* @since 0.1.0
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*/
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inline void set(const string_view key, const string_view value)
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{
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_configfile[key.data()] = value;
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}
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/*!
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* @brief Get a configuration setting.
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*
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* @param key The key of the setting.
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*
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* @throw nlohmann::detail::type_error Setting not found / Wrong type.
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*
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* @since 0.1.0
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*/
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[[nodiscard]]
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inline string get(const string_view key) const
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{
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return _configfile[key.data()].get<string>();
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}
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private:
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const string _filename;
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const fs::path _filepath;
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json _configfile;
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};
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} // namespace FediPotato
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#endif // FEDIPOTATO_CONFIG_HPP
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