/**
 * 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 "ProxyVector.h"

namespace relpipe {
namespace in {
namespace asn1 {
namespace lib {

class XMLContentHandler {
public:

	virtual ~XMLContentHandler() = default;

	/**
	 * @param uri identifier of the option
	 * @param value value of the option
	 * @return whether this option is supported and was applied here
	 */
	virtual bool setOption(const std::string& uri, const std::string& value) {
		return false;
	}

	// FIXME: namespaces, check names

	virtual void writeStartElement(const std::string& name, const std::vector<std::string>& attributes = {}) = 0;
	virtual void writeEndElement() = 0;
	virtual void writeCharacters(const std::string& value) = 0;
	virtual void writeComment(const std::string& value, bool addSpaces = true) = 0;

};

class XMLContentHandlerProxy : XMLContentHandler {
private:
	ProxyVector<XMLContentHandler> handlers;
public:

	void addHandler(std::shared_ptr<XMLContentHandler> handler) {
		handlers.push_back(handler);
	}

	void writeStartElement(const std::string& name, const std::vector<std::string>& attributes = {}) override {
		handlers.forward(&XMLContentHandler::writeStartElement, name, attributes);
	}

	void writeEndElement() override {
		handlers.forward(&XMLContentHandler::writeEndElement);
	}

	void writeCharacters(const std::string& value) override {
		handlers.forward(&XMLContentHandler::writeCharacters, value);
	}

	void writeComment(const std::string& value, bool addSpaces = true) override {
		handlers.forward(&XMLContentHandler::writeComment, value, addSpaces);
	}

};

}
}
}
}