ADD_SUBDIRECTORY(swiften)

cmake_minimum_required(VERSION 2.6)

FILE(GLOB SRC *.cpp)

ADD_EXECUTABLE(spectrum2_swiften_backend ${SRC})

target_link_libraries(spectrum2_swiften_backend transport pthread ${Boost_LIBRARIES} ${SWIFTEN_LIBRARY} ${LOG4CXX_LIBRARIES})

INSTALL(TARGETS spectrum2_swiften_backend RUNTIME DESTINATION bin)

// Transport includes

#include "transport/config.h"

#include "transport/networkplugin.h"

#include "transport/logging.h"

// Swiften

#include "Swiften/Swiften.h"

// for signal handler

#include "unistd.h"

#include "signal.h"

#include "sys/wait.h"

#include "sys/signal.h"

// malloc_trim

#include "malloc.h"

// Boost

#include <boost/algorithm/string.hpp>

using namespace boost::filesystem;

using namespace boost::program_options;

using namespace Transport;

DEFINE_LOGGER(logger, "Swiften");

// eventloop

Swift::SimpleEventLoop *loop_;

// Plugins

class SwiftenPlugin;

SwiftenPlugin *np = NULL;

class SwiftenPlugin : public NetworkPlugin {

	public:

		Swift::BoostNetworkFactories *m_factories;

		Swift::BoostIOServiceThread m_boostIOServiceThread;

		boost::shared_ptr<Swift::Connection> m_conn;

		SwiftenPlugin(Config *config, Swift::SimpleEventLoop *loop, const std::string &host, int port) : NetworkPlugin() {

			this->config = config;

			m_factories = new Swift::BoostNetworkFactories(loop);

			m_conn = m_factories->getConnectionFactory()->createConnection();

			m_conn->onDataRead.connect(boost::bind(&SwiftenPlugin::_handleDataRead, this, _1));

			m_conn->connect(Swift::HostAddressPort(Swift::HostAddress(host), port));

			LOG4CXX_INFO(logger, "Starting the plugin.");

		}

		// NetworkPlugin uses this method to send the data to networkplugin server

		void sendData(const std::string &string) {

			m_conn->write(Swift::createSafeByteArray(string));

		}

		// This method has to call handleDataRead with all received data from network plugin server

		void _handleDataRead(boost::shared_ptr<Swift::SafeByteArray> data) {

			std::string d(data->begin(), data->end());

			handleDataRead(d);

		}

		void handleSwiftDisconnected(const std::string &user, const boost::optional<Swift::ClientError> &error) {

			std::string message = "";

			if (error) {

				switch(error->getType()) {

					case Swift::ClientError::UnknownError: message = ("Unknown Error"); break;

					case Swift::ClientError::DomainNameResolveError: message = ("Unable to find server"); break;

					case Swift::ClientError::ConnectionError: message = ("Error connecting to server"); break;

					case Swift::ClientError::ConnectionReadError: message = ("Error while receiving server data"); break;

					case Swift::ClientError::ConnectionWriteError: message = ("Error while sending data to the server"); break;

					case Swift::ClientError::XMLError: message = ("Error parsing server data"); break;

					case Swift::ClientError::AuthenticationFailedError: message = ("Login/password invalid"); break;

					case Swift::ClientError::CompressionFailedError: message = ("Error while compressing stream"); break;

					case Swift::ClientError::ServerVerificationFailedError: message = ("Server verification failed"); break;

					case Swift::ClientError::NoSupportedAuthMechanismsError: message = ("Authentication mechanisms not supported"); break;

					case Swift::ClientError::UnexpectedElementError: message = ("Unexpected response"); break;

					case Swift::ClientError::ResourceBindError: message = ("Error binding resource"); break;

					case Swift::ClientError::SessionStartError: message = ("Error starting session"); break;

					case Swift::ClientError::StreamError: message = ("Stream error"); break;

					case Swift::ClientError::TLSError: message = ("Encryption error"); break;

					case Swift::ClientError::ClientCertificateLoadError: message = ("Error loading certificate (Invalid password?)"); break;

					case Swift::ClientError::ClientCertificateError: message = ("Certificate not authorized"); break;

					case Swift::ClientError::UnknownCertificateError: message = ("Unknown certificate"); break;

					case Swift::ClientError::CertificateExpiredError: message = ("Certificate has expired"); break;

					case Swift::ClientError::CertificateNotYetValidError: message = ("Certificate is not yet valid"); break;

					case Swift::ClientError::CertificateSelfSignedError: message = ("Certificate is self-signed"); break;

					case Swift::ClientError::CertificateRejectedError: message = ("Certificate has been rejected"); break;

					case Swift::ClientError::CertificateUntrustedError: message = ("Certificate is not trusted"); break;

					case Swift::ClientError::InvalidCertificatePurposeError: message = ("Certificate cannot be used for encrypting your connection"); break;

					case Swift::ClientError::CertificatePathLengthExceededError: message = ("Certificate path length constraint exceeded"); break;

					case Swift::ClientError::InvalidCertificateSignatureError: message = ("Invalid certificate signature"); break;

					case Swift::ClientError::InvalidCAError: message = ("Invalid Certificate Authority"); break;

					case Swift::ClientError::InvalidServerIdentityError: message = ("Certificate does not match the host identity"); break;

				}

			}

			LOG4CXX_INFO(logger, user << ": Disconnected " << message);

			handleDisconnected(user, 3, message);

			boost::shared_ptr<Swift::Client> client = m_users[user];

			if (client) {

				client->onConnected.disconnect(boost::bind(&SwiftenPlugin::handleSwiftConnected, this, user));

				client->onDisconnected.disconnect(boost::bind(&SwiftenPlugin::handleSwiftDisconnected, this, user, _1));

				client->onMessageReceived.disconnect(boost::bind(&SwiftenPlugin::handleSwiftMessageReceived, this, user, _1));

				m_users.erase(user);

			}

#ifndef WIN32

			// force returning of memory chunks allocated by libxml2 to kernel

			malloc_trim(0);

#endif

		}

		void handleSwiftConnected(const std::string &user) {

			handleConnected(user);

			m_users[user]->requestRoster();

			Swift::Presence::ref response = Swift::Presence::create();

			response->setFrom(m_users[user]->getJID());

			m_users[user]->sendPresence(response);

		}

		void handleSwiftRosterReceived(const std::string &user) {

			Swift::PresenceOracle *oracle = m_users[user]->getPresenceOracle();

			BOOST_FOREACH(const Swift::XMPPRosterItem &item, m_users[user]->getRoster()->getItems()) {

				Swift::Presence::ref lastPresence = oracle->getLastPresence(item.getJID());

				pbnetwork::StatusType status = lastPresence ? ((pbnetwork::StatusType) lastPresence->getShow()) : pbnetwork::STATUS_NONE;

				handleBuddyChanged(user, item.getJID().toBare().toString(),

								   item.getName(), item.getGroups(), status);

			}

		}

		void handleSwiftPresenceChanged(const std::string &user, Swift::Presence::ref presence) {

			LOG4CXX_INFO(logger, user << ": " << presence->getFrom().toBare().toString() << " presence changed");

			std::string message = presence->getStatus();

			std::string photo = "";

			boost::shared_ptr<Swift::VCardUpdate> update = presence->getPayload<Swift::VCardUpdate>();

			if (update) {

				photo = update->getPhotoHash();

			}

			boost::optional<Swift::XMPPRosterItem> item = m_users[user]->getRoster()->getItem(presence->getFrom());

			if (item) {

				handleBuddyChanged(user, presence->getFrom().toBare().toString(), item->getName(), item->getGroups(), (pbnetwork::StatusType) presence->getShow(), message, photo);

			}

			else {

				std::vector<std::string> groups;

				handleBuddyChanged(user, presence->getFrom().toBare().toString(), presence->getFrom().toBare(), groups, (pbnetwork::StatusType) presence->getShow(), message, photo);

			}

		}

		void handleSwiftMessageReceived(const std::string &user, Swift::Message::ref message) {

			std::string body = message->getBody();

			boost::shared_ptr<Swift::Client> client = m_users[user];

			if (client) {

				handleMessage(user, message->getFrom().toBare().toString(), body, "", "");

			}

		}

		void handleSwiftVCardReceived(const std::string &user, unsigned int id, Swift::VCard::ref vcard, Swift::ErrorPayload::ref error) {

			if (error || !vcard) {

				LOG4CXX_INFO(logger, user << ": error fetching VCard with id=" << id);

				handleVCard(user, id, "", "", "", "");

				return;

			}

			LOG4CXX_INFO(logger, user << ": VCard fetched - id=" << id);

			std::string photo((const char *)&vcard->getPhoto()[0], vcard->getPhoto().size());

			handleVCard(user, id, vcard->getFullName(), vcard->getFullName(), vcard->getNickname(), photo);

		}

		void handleLoginRequest(const std::string &user, const std::string &legacyName, const std::string &password) {

			LOG4CXX_INFO(logger, user << ": connecting as " << legacyName);

			boost::shared_ptr<Swift::Client> client = boost::make_shared<Swift::Client>(Swift::JID(legacyName), password, m_factories);

			m_users[user] = client;

			client->setAlwaysTrustCertificates();

			client->onConnected.connect(boost::bind(&SwiftenPlugin::handleSwiftConnected, this, user));

			client->onDisconnected.connect(boost::bind(&SwiftenPlugin::handleSwiftDisconnected, this, user, _1));

			client->onMessageReceived.connect(boost::bind(&SwiftenPlugin::handleSwiftMessageReceived, this, user, _1));

			client->getRoster()->onInitialRosterPopulated.connect(boost::bind(&SwiftenPlugin::handleSwiftRosterReceived, this, user));

			client->getPresenceOracle()->onPresenceChange.connect(boost::bind(&SwiftenPlugin::handleSwiftPresenceChanged, this, user, _1));

			Swift::ClientOptions opt;

			opt.allowPLAINWithoutTLS = true;

			client->connect(opt);

		}

		void handleLogoutRequest(const std::string &user, const std::string &legacyName) {

			boost::shared_ptr<Swift::Client> client = m_users[user];

			if (client) {

				client->onConnected.disconnect(boost::bind(&SwiftenPlugin::handleSwiftConnected, this, user));

// 				client->onDisconnected.disconnect(boost::bind(&SwiftenPlugin::handleSwiftDisconnected, this, user, _1));

				client->onMessageReceived.disconnect(boost::bind(&SwiftenPlugin::handleSwiftMessageReceived, this, user, _1));

				client->getRoster()->onInitialRosterPopulated.disconnect(boost::bind(&SwiftenPlugin::handleSwiftRosterReceived, this, user));

				client->getPresenceOracle()->onPresenceChange.disconnect(boost::bind(&SwiftenPlugin::handleSwiftPresenceChanged, this, user, _1));

				client->disconnect();

			}

		}

		void handleMessageSendRequest(const std::string &user, const std::string &legacyName, const std::string &msg, const std::string &xhtml = "") {

			LOG4CXX_INFO(logger, "Sending message from " << user << " to " << legacyName << ".");

			boost::shared_ptr<Swift::Client> client = m_users[user];

			if (client) {

				boost::shared_ptr<Swift::Message> message(new Swift::Message());

				message->setTo(Swift::JID(legacyName));

				message->setFrom(client->getJID());

				message->setBody(msg);

				client->sendMessage(message);

			}

		}

		void handleVCardRequest(const std::string &user, const std::string &legacyName, unsigned int id) {

			boost::shared_ptr<Swift::Client> client = m_users[user];

			if (client) {

				LOG4CXX_INFO(logger, user << ": fetching VCard of " << legacyName << " id=" << id);

				Swift::GetVCardRequest::ref request = Swift::GetVCardRequest::create(Swift::JID(legacyName), client->getIQRouter());

				request->onResponse.connect(boost::bind(&SwiftenPlugin::handleSwiftVCardReceived, this, user, id, _1, _2));

				request->send();

			}

		}

		void handleBuddyUpdatedRequest(const std::string &user, const std::string &buddyName, const std::string &alias, const std::vector<std::string> &groups) {

// 			LOG4CXX_INFO(logger, user << ": Added buddy " << buddyName << ".");

// 			handleBuddyChanged(user, buddyName, alias, groups, pbnetwork::STATUS_ONLINE);

		}

		void handleBuddyRemovedRequest(const std::string &user, const std::string &buddyName, const std::vector<std::string> &groups) {

		}

	private:

		Config *config;

		std::map<std::string, boost::shared_ptr<Swift::Client> > m_users;

};

static void spectrum_sigchld_handler(int sig)

{

	int status;

	pid_t pid;

	do {

		pid = waitpid(-1, &status, WNOHANG);

	} while (pid != 0 && pid != (pid_t)-1);

	if ((pid == (pid_t) - 1) && (errno != ECHILD)) {

		char errmsg[BUFSIZ];

		snprintf(errmsg, BUFSIZ, "Warning: waitpid() returned %d", pid);

		perror(errmsg);

	}

}

int main (int argc, char* argv[]) {

	std::string host;

	int port;

	if (signal(SIGCHLD, spectrum_sigchld_handler) == SIG_ERR) {

		std::cout << "SIGCHLD handler can't be set\n";

		return -1;

	}

	boost::program_options::options_description desc("Usage: spectrum [OPTIONS] <config_file.cfg>\nAllowed options");

	desc.add_options()

		("host,h", value<std::string>(&host), "host")

		("port,p", value<int>(&port), "port")

		;

	try

	{

		boost::program_options::variables_map vm;

		boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), vm);

		boost::program_options::notify(vm);

	}

	catch (std::runtime_error& e)

	{

		std::cout << desc << "\n";

		exit(1);

	}

	catch (...)

	{

		std::cout << desc << "\n";

		exit(1);

	}

	if (argc < 5) {

		return 1;

	}

	Config config;

	if (!config.load(argv[5])) {

		std::cerr << "Can't open " << argv[1] << " configuration file.\n";

		return 1;

	}

	Logging::initBackendLogging(&config);

	Swift::SimpleEventLoop eventLoop;

	loop_ = &eventLoop;

	np = new SwiftenPlugin(&config, &eventLoop, host, port);

	loop_->run();

	return 0;

}

backend=../..//backends/swiften/spectrum2_swiften_backend