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#include "listener.h"
#include "common/console.h"
#include "common/commands.h"
#include "common/handshake_generated.h"
#include "common/revisionupdate_generated.h"
#include <QLocalSocket>
#include <QTimer>
Listener::Listener(const QString &resource, QObject *parent)
: QObject(parent),
m_server(new QLocalServer(this)),
m_revision(0)
{
connect(m_server, &QLocalServer::newConnection,
this, &Listener::acceptConnection);
Console::main()->log(QString("Trying to open %1").arg(resource));
if (!m_server->listen(resource)) {
// FIXME: multiple starts need to be handled here
m_server->removeServer(resource);
if (!m_server->listen(resource)) {
Console::main()->log("Utter failure to start server");
exit(-1);
}
}
if (m_server->isListening()) {
Console::main()->log(QString("Listening on %1").arg(m_server->serverName()));
}
QTimer::singleShot(2000, this, SLOT(checkConnections()));
}
Listener::~Listener()
{
}
void Listener::setRevision(unsigned long long revision)
{
if (m_revision != revision) {
m_revision = revision;
updateClientsWithRevision();
}
}
unsigned long long Listener::revision() const
{
return m_revision;
}
void Listener::closeAllConnections()
{
//TODO: close all client connectionsin m_connections
for (Client &client: m_connections) {
if (client.socket) {
client.socket->close();
delete client.socket;
client.socket = 0;
}
}
}
void Listener::acceptConnection()
{
Console::main()->log(QString("Accepting connection"));
QLocalSocket *socket = m_server->nextPendingConnection();
if (!socket) {
return;
}
Console::main()->log("Got a connection");
Client client("Unknown Client" /*fixme: actual names!*/, socket);
connect(socket, &QIODevice::readyRead,
this, &Listener::readFromSocket);
m_connections << client;
connect(socket, &QLocalSocket::disconnected,
this, &Listener::clientDropped);
}
void Listener::clientDropped()
{
QLocalSocket *socket = qobject_cast<QLocalSocket *>(sender());
if (!socket) {
return;
}
Console::main()->log("Dropping connection...");
QMutableVectorIterator<Client> it(m_connections);
while (it.hasNext()) {
const Client &client = it.next();
if (client.socket == socket) {
Console::main()->log(QString(" dropped... %1").arg(client.name));
it.remove();
break;
}
}
checkConnections();
}
void Listener::checkConnections()
{
if (m_connections.isEmpty()) {
m_server->close();
emit noClients();
}
}
void Listener::readFromSocket()
{
QLocalSocket *socket = qobject_cast<QLocalSocket *>(sender());
if (!socket) {
return;
}
Console::main()->log("Reading from socket...");
for (Client &client: m_connections) {
if (client.socket == socket) {
Console::main()->log(QString(" Client: %1").arg(client.name));
client.commandBuffer += socket->readAll();
// FIXME: schedule these rather than process them all at once
// right now this can lead to starvation of clients due to
// one overly active client
while (processClientBuffer(client)) {}
break;
}
}
}
bool Listener::processClientBuffer(Client &client)
{
static const int headerSize = (sizeof(int) * 2);
Console::main()->log(QString("processing %1").arg(client.commandBuffer.size()));
if (client.commandBuffer.size() < headerSize) {
return false;
}
int commandId, size;
commandId = *(int*)client.commandBuffer.constData();
size = *(int*)(client.commandBuffer.constData() + sizeof(int));
if (size <= client.commandBuffer.size() - headerSize) {
QByteArray data = client.commandBuffer.mid(headerSize, size);
client.commandBuffer.remove(0, headerSize + size);
switch (commandId) {
case Commands::HandshakeCommand: {
auto buffer = Akonadi::GetHandshake(data.constData());
Console::main()->log(QString(" Handshake from %1").arg(buffer->name()->c_str()));
sendCurrentRevision(client);
break;
}
default:
// client.hasSentCommand = true;
break;
}
return client.commandBuffer.size() >= headerSize;
} else {
return false;
}
}
void Listener::sendCurrentRevision(Client &client)
{
if (!client.socket || !client.socket->isValid()) {
return;
}
auto command = Akonadi::CreateRevisionUpdate(m_fbb, m_revision);
Akonadi::FinishRevisionUpdateBuffer(m_fbb, command);
Commands::write(client.socket, Commands::RevisionUpdateCommand, m_fbb);
m_fbb.Clear();
}
void Listener::updateClientsWithRevision()
{
auto command = Akonadi::CreateRevisionUpdate(m_fbb, m_revision);
Akonadi::FinishRevisionUpdateBuffer(m_fbb, command);
for (const Client &client: m_connections) {
if (!client.socket || !client.socket->isValid()) {
continue;
}
Commands::write(client.socket, Commands::RevisionUpdateCommand, m_fbb);
}
m_fbb.Clear();
}
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