95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/**
|
||
* Read the config file and save all the values in a map.
|
||
* Also, a singleton.
|
||
*
|
||
* Use Config::filename = "bla" to set the filename you want to use.
|
||
*
|
||
* If you want to exit if the file does not exist when it is open for
|
||
* reading, set Config::file_must_exist = true.
|
||
*
|
||
* Config::get() can then be used to access the values in the conf.
|
||
*
|
||
* Use Config::close() when you're done getting/setting value. This will
|
||
* save the config into the file.
|
||
*/
|
||
|
||
#ifndef CONFIG_INCLUDED
|
||
# define CONFIG_INCLUDED
|
||
|
||
#include <functional>
|
||
#include <fstream>
|
||
#include <memory>
|
||
#include <vector>
|
||
#include <string>
|
||
#include <map>
|
||
|
||
typedef std::function<void()> t_config_changed_callback;
|
||
|
||
class Config
|
||
{
|
||
public:
|
||
Config() = default;
|
||
~Config() = default;
|
||
Config(const Config&) = delete;
|
||
Config& operator=(const Config&) = delete;
|
||
Config(Config&&) = delete;
|
||
Config& operator=(Config&&) = delete;
|
||
|
||
/**
|
||
* returns a value from the config. If it doesn’t exist, use
|
||
* the second argument as the default.
|
||
*/
|
||
static std::string get(const std::string&, const std::string&);
|
||
/**
|
||
* returns a value from the config. If it doesn’t exist, use
|
||
* the second argument as the default.
|
||
*/
|
||
static int get_int(const std::string&, const int&);
|
||
/**
|
||
* Set a value for the given option. And write all the config
|
||
* in the file from which it was read if save is true.
|
||
*/
|
||
static void set(const std::string&, const std::string&, bool save = false);
|
||
/**
|
||
* Adds a function to a list. This function will be called whenever a
|
||
* configuration change occurs (when set() is called, or when the initial
|
||
* conf is read)
|
||
*/
|
||
static void connect(t_config_changed_callback);
|
||
/**
|
||
* Destroy the instance, forcing it to be recreated (with potentially
|
||
* different parameters) the next time it’s needed.
|
||
*/
|
||
static void clear();
|
||
/**
|
||
* Read the configuration file at the given path.
|
||
*/
|
||
static bool read_conf(const std::string& name="");
|
||
/**
|
||
* Get the filename
|
||
*/
|
||
static const std::string& get_filename()
|
||
{ return Config::filename; }
|
||
|
||
private:
|
||
/**
|
||
* Set the value of the filename to use, before calling any method.
|
||
*/
|
||
static std::string filename;
|
||
/**
|
||
* Write all the config values into the configuration file
|
||
*/
|
||
static void save_to_file();
|
||
/**
|
||
* Call all the callbacks previously registered using connect().
|
||
* This is used to notify any class that a configuration change occured.
|
||
*/
|
||
static void trigger_configuration_change();
|
||
|
||
static std::map<std::string, std::string> values;
|
||
static std::vector<t_config_changed_callback> callbacks;
|
||
|
||
};
|
||
|
||
#endif // CONFIG_INCLUDED
|