Slimline fork of https://github.com/SpectrumIM/spectrum2, with lots of things cleaned up and improved
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/**
* libtransport -- C++ library for easy XMPP Transports development
*
* Copyright (C) 2011, Jan Kaluza <hanzz.k@gmail.com>
*
* This program 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 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#pragma once
#include <boost/algorithm/string.hpp>
#include <boost/assign.hpp>
#include <boost/bind.hpp>
#include <boost/foreach.hpp>
#include <boost/format.hpp>
#include <boost/program_options.hpp>
#include <boost/signals2.hpp>
namespace Transport {
template <class myType> const myType &safeAs(const boost::program_options::variable_value &var, const myType &def) {
try {
return var.as<myType>();
} catch (...) {
return def;
}
}
} // namespace Transport
#define CONFIG_HAS_KEY(PTR, KEY) (*PTR).hasKey(KEY)
#define CONFIG_STRING(PTR, KEY) (*PTR)[KEY].as<std::string>()
#define CONFIG_INT(PTR, KEY) (*PTR)[KEY].as<int>()
#define CONFIG_BOOL(PTR, KEY) (*PTR)[KEY].as<bool>()
#define CONFIG_LIST(PTR, KEY) (*PTR)[KEY].as<std::list<std::string>>()
#define CONFIG_VECTOR(PTR, KEY) \
((*PTR).hasKey(KEY) ? (*PTR)[KEY].as<std::vector<std::string>>() : std::vector<std::string>())
#define CONFIG_STRING_DEFAULTED(PTR, KEY, DEF) \
((*PTR).hasKey(KEY) ? Transport::safeAs<std::string>((*PTR)[KEY], DEF) : DEF)
#define CONFIG_BOOL_DEFAULTED(PTR, KEY, DEF) ((*PTR).hasKey(KEY) ? Transport::safeAs<bool>((*PTR)[KEY], DEF) : DEF)
#define CONFIG_LIST_DEFAULTED(PTR, KEY, DEF) \
((*PTR).hasKey(KEY) ? Transport::safeAs<std::list<std::string>>((*PTR)[KEY], DEF) : DEF)
#define CONFIG_INT_DEFAULTED(PTR, KEY, DEF) ((*PTR).hasKey(KEY) ? Transport::safeAs<int>((*PTR)[KEY], DEF) : DEF)
namespace Transport {
/// Represents variable:value pairs.
typedef boost::program_options::variables_map Variables;
/// Represents config file.
/// It's used to load config file and allows others parts of libtransport to be
/// configured properly. Config files are text files which use "ini" format.
/// Variables are divided into multiple sections. Every class is configurable
/// with some variables which change its behavior. Check particular class
/// documentation to get a list of all relevant variables for that class.
class Config {
public:
typedef std::map<std::string, boost::program_options::variable_value> SectionValuesCont;
typedef std::map<std::string, boost::program_options::variable_value> UnregisteredCont;
/// Constructor.
Config(int argc = 0, char **argv = NULL) : m_argc(argc), m_argv(argv) {
}
/// Destructor
virtual ~Config() {
}
/// Loads data from config file.
/// You can pass your extra options which will be recognized by
/// the parser using opts parameter.
/// \param configfile path to config file
/// \param opts extra options which will be recognized by a parser
bool load(const std::string &configfile, boost::program_options::options_description &opts,
const std::string &jid = "");
bool load(std::istream &ifs, boost::program_options::options_description &opts, const std::string &jid = "");
bool load(std::istream &ifs);
/// Loads data from config file.
/// This function loads only config variables needed by libtransport.
/// \see load(const std::string &, boost::program_options::options_description
/// &) \param configfile path to config file
bool load(const std::string &configfile, const std::string &jid = "");
bool reload();
bool hasKey(const std::string &key) {
return (m_variables.find(key) != m_variables.end() || m_unregistered.find(key) != m_unregistered.end() ||
m_backendConfig.find(key) != m_backendConfig.end());
}
/// Returns value of variable defined by key.
/// For variables in sections you can use "section.variable" key format.
/// \param key config variable name
const boost::program_options::variable_value &operator[](const std::string &key) {
if (m_variables.find(key) != m_variables.end()) {
return m_variables[key];
}
if (m_backendConfig.find(key) != m_backendConfig.end()) {
return m_backendConfig[key];
}
return m_unregistered[key];
}
SectionValuesCont getSectionValues(const std::string &sectionName);
int getArgc();
char **getArgv();
/// Returns path to config file from which data were loaded.
const std::string &getConfigFile() {
return m_file;
}
/// This signal is emitted when config is loaded/reloaded.
boost::signals2::signal<void()> onConfigReloaded;
void updateBackendConfig(const std::string &backendConfig);
boost::signals2::signal<void()> onBackendConfigUpdated;
static Config *createFromArgs(int argc, char **argv, std::string &error, std::string &host, int &port);
private:
int m_argc;
char **m_argv;
std::string m_file;
std::string m_jid;
protected:
Variables m_variables;
Variables m_backendConfig;
std::map<std::string, boost::program_options::variable_value> m_unregistered;
};
} // namespace Transport