Initial commit, allows for storing simpel values and boost::hana adapted structs at "key"HEADmaster

1 files changed, 84 insertions, 0 deletions

diff --git a/configpp.cpp b/configpp.cpp
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index 0000000..c434979
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+++ b/configpp.cpp
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+
+#include "configpp.hpp"
+
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/operations.hpp>
+#include <boost/property_tree/json_parser.hpp>
+
+#include <fstream>
+
+namespace configpp {
+
+std::unique_ptr<Config> Config::config_ptr = nullptr;
+
+#if defined( _WIN32 ) || defined( _WIN64 )
+boost::filesystem::path get_config_base_dir() {
+	if(!std::getenv("APPDATA")) {
+		throw std::runtime_error("Environment variable \"APPDATA\" is not set, could not find suitable config home.");
+	}
+	boost::filesystem::path appdata(std::getenv("APPDATA"));
+	return appdata
+}
+#endif
+
+#if defined( __unix__ ) && !defined( __APPLE__) && !defined( __MACH__ )
+boost::filesystem::path get_config_base_dir() {
+	boost::filesystem::path config_home;
+	boost::filesystem::path path;
+	if(!std::getenv("XDG_CONFIG_HOME")) {
+		if(!std::getenv("HOME")) {
+			throw std::runtime_error("Neither \"XDG_CONFIG_HOME\" nor \"HOME\" environment variable are set, could not find suitable config home.");
+		} else {
+			config_home = getenv("HOME");
+			path = config_home / boost::filesystem::path(".config");
+		}
+	} else {
+		path = getenv("XDG_CONFIG_HOME");
+	}
+	return path;
+}
+
+#endif
+
+#if defined( __APPLE__ ) && defined( __MACH__ )
+boost::filesystem::path get_config_base_dir(std::string subdir) {
+	boost::filesystem::path path;
+	if(!std::getenv("HOME")) {
+		throw std::runtime_error("\"HOME\" environment variable is not set, could not find a suitable config home.");
+	} else {
+		path = boost::filesystem::path(std::getenv("HOME"));
+	}
+	return path;
+}
+#endif
+
+using namespace boost::filesystem;
+
+Config::Config(std::string subdir, std::string filename)
+: config()
+, subdir(subdir)
+, filename(filename)
+{
+	auto dir = get_config_base_dir() / path(subdir);
+	auto file_path = dir / filename;
+	
+	if(exists(file_path)) {
+		std::ifstream file_stream(file_path.string());
+		boost::property_tree::read_json(file_stream, config);
+	}
+}
+
+Config::~Config()
+{
+	auto dir = get_config_base_dir() / path(subdir);
+	auto file_path = dir / filename;
+	
+	if(!exists(dir)) {
+		boost::filesystem::create_directories(dir);
+	}
+
+	std::ofstream file_stream(file_path.string());
+	boost::property_tree::write_json(file_stream, config);
+}
+
+} //namespace configpp
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