GameSettings.h

#pragma once

#include "tinyxml2.h"

#include <map>
#include <string>
#include <sstream>

/*
Provides access to the settings of the game. The settings are loaded once
as the game launches, and then every aspect that needs the settings
(read or write) can access one singleton (DONT JUDGE ME!) of the settings class.
*/
class GameSettings
{
public:
    static void LoadSettings(std::string settingsFileName);
    static GameSettings* GetSettings();

    template <typename T> inline T GetValue(std::string settingsName);
protected:
private:
    GameSettings(std::string settingsFileName);
    ~GameSettings();

    static GameSettings* m_SettingsInstance;

    tinyxml2::XMLElement* m_SettingsElement;
    tinyxml2::XMLElement* GetXMLElementWithTagName(std::string tagName);
};

/*
Returns an integer value.
*/
template <> int GameSettings::GetValue<int>(std::string settingsName)
{
    tinyxml2::XMLElement* valueElement = GetXMLElementWithTagName(settingsName);
    if (!valueElement)
    {
        throw valueElement;
    }
    std::stringstream strValue;
    strValue << valueElement->GetText();
    int intValue; strValue >> intValue;
    return intValue;
}

/*
Returns a std::string value.
*/
template <> std::string GameSettings::GetValue<std::string>(std::string settingsName)
{
    tinyxml2::XMLElement* valueElement = GetXMLElementWithTagName(settingsName);
    if (!valueElement)
    {
        throw valueElement;
    }
    return std::string(valueElement->GetText());
}