/*! \file pitranslator.h
 * \ingroup Application
 * \~\brief
 * \~english Translation support
 * \~russian Поддержка перевода
 */
/*
    PIP - Platform Independent Primitives
	Translation support
    Ivan Pelipenko peri4ko@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef pitranslator_H
#define pitranslator_H

#include "pistring.h"


#define piTr     PITranslator::tr
#define piTrNoOp PITranslator::trNoOp

//! \ingroup Application
//! \~\brief
//! \~english Translation support
//! \~russian Поддержка перевода
class PIP_EXPORT PITranslator {
public:
	static PIString tr(const PIString & in, const PIString & context = {});
	static PIString tr(const char * in, const PIString & context = {}) { return tr(PIString::fromUTF8(in), context); }
	static PIString trNoOp(const PIString & in, const PIString & context = {}) { return in; }
	static PIString trNoOp(const char * in, const PIString & context = {}) { return trNoOp(PIString::fromUTF8(in), context); }

	static void clear();
	static void loadLang(const PIString & short_lang, PIString dir = {});
	static void loadConfig(const PIString & content);
	static bool load(const PIByteArray & content);
	static bool loadFile(const PIString & path);

private:
	PITranslator();
	~PITranslator();
	NO_COPY_CLASS(PITranslator)
	PRIVATE_DECLARATION(PIP_EXPORT)

	static PITranslator * instance();
};


class PIStringContextTr {
public:
	PIStringContextTr(PIString && s): _s(s) {}
	operator PIString() const { return PITranslator::tr(_s); }
	PIString operator()(const PIString & ctx = {}) const { return PITranslator::tr(_s, ctx); }

private:
	PIString _s;
};


class PIStringContextTrNoOp {
public:
	PIStringContextTrNoOp(PIString && s): _s(s) {}
	operator PIString() const { return _s; }
	PIString operator()(const PIString & ctx = {}) const { return _s; }

private:
	PIString _s;
};


//! \~\brief
//! \~english Translate string with \a PITranslator::tr()
//! \~russian Перевести строку с помощью \a PITranslator::tr()
inline PIStringContextTr operator""_tr(const char * v, size_t sz) {
	return PIStringContextTr(PIString::fromUTF8(v, sz));
}

//! \~\brief
//! \~english Translate string with \a PITranslator::tr()
//! \~russian Перевести строку с помощью \a PITranslator::tr()
inline PIStringContextTrNoOp operator""_trNoOp(const char * v, size_t sz) {
	return PIStringContextTrNoOp(PIString::fromUTF8(v, sz));
}

#endif