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/*
 * Copyright (c) 2010-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <memory>
#include <string>

#include <boost/bind.hpp>

#include <Swiften/Base/IDGenerator.h>
#include <Swiften/Elements/IQ.h>
#include <Swiften/Elements/RosterPayload.h>
#include <Swiften/Elements/Stanza.h>
#include <Swiften/Elements/VCard.h>
#include <Swiften/EventLoop/EventLoop.h>
#include <Swiften/EventLoop/EventOwner.h>
#include <Swiften/EventLoop/SimpleEventLoop.h>
#include <Swiften/Network/BoostConnection.h>
#include <Swiften/Network/BoostConnectionServer.h>
#include <Swiften/Network/BoostIOServiceThread.h>
#include <Swiften/Network/ConnectionServer.h>
#include <Swiften/Parser/PayloadParsers/FullPayloadParserFactoryCollection.h>
#include <Swiften/Parser/PlatformXMLParserFactory.h>
#include <Swiften/Serializer/PayloadSerializers/FullPayloadSerializerCollection.h>

#include <Limber/Server/ServerFromClientSession.h>
#include <Limber/Server/SimpleUserRegistry.h>

using namespace Swift;

class Server {
    public:
        Server(UserRegistry* userRegistry, EventLoop* eventLoop) : userRegistry_(userRegistry) {
            serverFromClientConnectionServer_ = BoostConnectionServer::create(5222, boostIOServiceThread_.getIOService(), eventLoop);
            serverFromClientConnectionServer_->onNewConnection.connect(boost::bind(&Server::handleNewConnection, this, _1));
            serverFromClientConnectionServer_->start();
        }

    private:
        void handleNewConnection(std::shared_ptr<Connection> c) {
            std::shared_ptr<ServerFromClientSession> session(new ServerFromClientSession(idGenerator_.generateID(), c, &payloadParserFactories_, &payloadSerializers_, &xmlParserFactory, userRegistry_));
            serverFromClientSessions_.push_back(session);
            session->onElementReceived.connect(boost::bind(&Server::handleElementReceived, this, _1, session));
            session->onSessionFinished.connect(boost::bind(&Server::handleSessionFinished, this, session));
            session->startSession();
        }

        void handleSessionFinished(std::shared_ptr<ServerFromClientSession> session) {
            serverFromClientSessions_.erase(std::remove(serverFromClientSessions_.begin(), serverFromClientSessions_.end(), session), serverFromClientSessions_.end());
        }

        void handleElementReceived(std::shared_ptr<ToplevelElement> element, std::shared_ptr<ServerFromClientSession> session) {
            std::shared_ptr<Stanza> stanza(std::dynamic_pointer_cast<Stanza>(element));
            if (!stanza) {
                return;
            }
            stanza->setFrom(session->getRemoteJID());
            if (!stanza->getTo().isValid()) {
                stanza->setTo(JID(session->getLocalJID()));
            }
            if (!stanza->getTo().isValid() || stanza->getTo() == session->getLocalJID() || stanza->getTo() == session->getRemoteJID().toBare()) {
                if (std::shared_ptr<IQ> iq = std::dynamic_pointer_cast<IQ>(stanza)) {
                    if (iq->getPayload<RosterPayload>()) {
                        session->sendElement(IQ::createResult(iq->getFrom(), iq->getID(), std::make_shared<RosterPayload>()));
                    }
                    if (iq->getPayload<VCard>()) {
                        if (iq->getType() == IQ::Get) {
                            std::shared_ptr<VCard> vcard(new VCard());
                            vcard->setNickname(iq->getFrom().getNode());
                            session->sendElement(IQ::createResult(iq->getFrom(), iq->getID(), vcard));
                        }
                        else {
                            session->sendElement(IQ::createError(iq->getFrom(), iq->getID(), ErrorPayload::Forbidden, ErrorPayload::Cancel));
                        }
                    }
                    else {
                        session->sendElement(IQ::createError(iq->getFrom(), iq->getID(), ErrorPayload::FeatureNotImplemented, ErrorPayload::Cancel));
                    }
                }
            }
        }

    private:
        IDGenerator idGenerator_;
        PlatformXMLParserFactory xmlParserFactory;
        UserRegistry* userRegistry_;
        BoostIOServiceThread boostIOServiceThread_;
        std::shared_ptr<BoostConnectionServer> serverFromClientConnectionServer_;
        std::vector< std::shared_ptr<ServerFromClientSession> > serverFromClientSessions_;
        FullPayloadParserFactoryCollection payloadParserFactories_;
        FullPayloadSerializerCollection payloadSerializers_;
};

int main() {
    SimpleEventLoop eventLoop;
    SimpleUserRegistry userRegistry;
    userRegistry.addUser(JID("remko@localhost"), "remko");
    userRegistry.addUser(JID("kevin@localhost"), "kevin");
    userRegistry.addUser(JID("remko@limber.swift.im"), "remko");
    userRegistry.addUser(JID("kevin@limber.swift.im"), "kevin");
    Server server(&userRegistry, &eventLoop);
    eventLoop.run();
    return 0;
}