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/*
 * Copyright (c) 2014 Kevin Smith and Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include <boost/lexical_cast.hpp>
#include <boost/optional.hpp>
#include <Swiften/Base/DateTime.h>
#include <Swiften/Parser/PayloadParserFactory.h>
#include <Swiften/Parser/PayloadParserFactoryCollection.h>
#include <Swiften/Parser/PayloadParsers/ForwardedParser.h>
#include <Swiften/Parser/PayloadParsers/MAMResultParser.h>

using namespace Swift;

MAMResultParser::MAMResultParser(PayloadParserFactoryCollection* factories) : factories_(factories), level_(TopLevel) {
}

void MAMResultParser::handleStartElement(const std::string& element, const std::string& ns, const AttributeMap& attributes) {
	if (level_ == TopLevel) {
		boost::optional<std::string> attributeValue;
		if ((attributeValue = attributes.getAttributeValue("id"))) {
			getPayloadInternal()->setID(*attributeValue);
		}
		if ((attributeValue = attributes.getAttributeValue("queryid"))) {
			getPayloadInternal()->setQueryID(*attributeValue);
		}
	} else if (level_ == PayloadLevel) {
		if (element == "forwarded" && ns == "urn:xmpp:forward:0") {
			payloadParser_ = boost::make_shared<ForwardedParser>(factories_);
		}
	}

	if (payloadParser_) {
		/* parsing a nested payload */
		payloadParser_->handleStartElement(element, ns, attributes);
	}

	++level_;
}

void MAMResultParser::handleEndElement(const std::string& element, const std::string& ns) {
	--level_;
	if (payloadParser_ && level_ >= PayloadLevel) {
		payloadParser_->handleEndElement(element, ns);
	}
	if (payloadParser_ && level_ == PayloadLevel) {
		/* done parsing nested stanza */
		getPayloadInternal()->setPayload(boost::dynamic_pointer_cast<Forwarded>(payloadParser_->getPayload()));
		payloadParser_.reset();
	}
}

void MAMResultParser::handleCharacterData(const std::string& data) {
	if (payloadParser_) {
		payloadParser_->handleCharacterData(data);
	}
}