INI.hpp

#pragma once

#include <string>
#include <memory>
#include <vector>

namespace handy
{
	namespace io
	{
		// Notes:
		// Duplicate sections will be merged
		// Duplicate item names will overwrite the first

		class INIFile
		{
			public:
				INIFile();
				~INIFile();

				// Open a file, load its contents, and close it.
				// Returns whether this was successful.
				bool loadFile (const std::wstring& filePath);

				// Save the current settings to the specified file.
				// Note that formatting and comments aren't preserved
				// and shall be destroyed by calling this function.
				//bool saveFile (const std::wstring& filePath);

				// Retrieve an item of the appropriate type. An item of the correct name but wrong type
				// is actually considered a different item altogether- indeed, it is possible to have
				// multiple entries of the same name differing only by value, but this is not sensible.
				//
				// There is a possible problem due to this- if an item is supposed to be a string but
				// happens to be "true" or "42", it will be read as a different type.
				//
				// Optionally, set *wasRead to true if the value was read correctly, or false if the default
				// was used instead.
				int64_t          getInteger (const std::wstring& section, const std::wstring& item, int64_t defaultVal, bool* wasRead = nullptr) const;
				std::vector<int> getIntegers(const std::wstring& section, const std::wstring& item, std::vector<int> defaultVal, bool* wasRead = nullptr) const;
				double           getDouble  (const std::wstring& section, const std::wstring& item, double defaultVal, bool* wasRead = nullptr) const;
				/*bool               getBool    (const std::wstring& section, const std::wstring& item, bool               defaultVal, bool* wasRead = nullptr) const;*/
				const std::wstring& getString  (const std::wstring& section, const std::wstring& item, const std::wstring& defaultVal, bool* wasRead = nullptr) const;

				// Set an item of the appropriate type, returning success.
				// Existing items of the same section, name, and type will
				// be overwritten with no warning.
				//
				// Shan't be written to any file until saveFile() is called.
				//bool setInteger (const std::wstring& section, const std::wstring& item, int64_t            value);
				//bool setDouble  (const std::wstring& section, const std::wstring& item, double             value);
				//bool setBool    (const std::wstring& section, const std::wstring& item, bool               value);
				//bool setString  (const std::wstring& section, const std::wstring& item, const std::wstring& value);


			private:
				INIFile(const INIFile& noCopyingAllowed);
				//INIFile& operator=(const INIFile& noCopyingAllowed);
				bool loadLines(const std::vector<std::wstring>& lines);
				struct INIFileImpl;
				std::unique_ptr<INIFileImpl> impl;

		};

	}
}