/**

 * Relational pipes

 * Copyright © 2021 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * 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, version 3 of the License.

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

#pragma once

#include <codecvt>

#include <vector>

#include <libxml++-2.6/libxml++/libxml++.h>

#include <vmime/vmime.hpp>

#include "XMLNameCodec.h"

namespace relpipe {

namespace in {

namespace xmltable {

class XMLDocumentConstructor {

private:

	std::istream* input = nullptr;

	xmlpp::DomParser* parser = nullptr;

	XMLNameCodec nameCodec;

	enum class Mode {

		ROOT,

		SEQUENCE,

		MAPPING,

		MAP_KEY

	};

	std::string rootName = "mime";

	xmlpp::Element* current;

	std::vector<Mode> mode;

	/**

	 * Both MIME and XML strings are in UTF-8.

	const char* y2x(mime_char_t* value) {

		return value ? (const char*) value : "";

	}

	const Glib::ustring y2xname(mime_char_t* value) {

		return nameCodec.encode(y2x(value));

	}

	 */

	xmlpp::Element* parentOrSelf(xmlpp::Element* current) {

		return current->get_parent() == nullptr ? current : current->get_parent();

	}

public:

	XMLDocumentConstructor(std::istream* input, xmlpp::DomParser* parser) : input(input), parser(parser) {

	}

	virtual ~XMLDocumentConstructor() {

	}

	void setOption(const std::string& uri, const std::string& value) {

		if (uri == "root-name") rootName = value;

		else throw std::invalid_argument(std::string("Invalid parser option: „") + uri + "“ with value: „" + value + "“");

	}

	void process() {

		current = parser->get_document()->create_root_node(rootName);

	}

};

}

}

}