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#include "Connection.hpp"
#include <QJsonDocument>
#include <QJsonParseError>
#include <QLocalServer>
#include <QLocalSocket>
#include <QString>
#include <QtDebug>
#include <vector>
using namespace Epistmool::Server;
namespace {
constexpr int kInvalidGeneration = 0;
} // namespace
ConnectionId ConnectionId::createInvalid()
{
return ConnectionId{
.index = 0,
.generation = kInvalidGeneration,
};
}
bool ConnectionId::isInvalid() const
{
return generation == kInvalidGeneration;
}
struct ConnectionManager::Connection
{
enum Type
{
Empty,
LocalSocket,
};
union
{
QLocalSocket* localSocket;
};
Type type = Empty;
int generation = kInvalidGeneration + 1;
void markEmpty()
{
type = Empty;
}
};
class ConnectionManager::Private
{
public:
static int findFreeConnectionObj(ConnectionManager& self)
{
for (int i = 0; i < self.mConnections.size(); ++i) {
auto& conn = self.mConnections[i];
if (conn.type == Connection::Empty) {
return i;
}
}
self.mConnections.push_back({});
return self.mConnections.size() - 1;
}
};
ConnectionManager::ConnectionManager(QObject* parent)
: QObject(parent)
{
}
ConnectionManager::~ConnectionManager() = default;
bool ConnectionManager::isLocalConnectionsEnabled() const
{
return mLocal != nullptr;
}
void ConnectionManager::setLocalConnectionsEnabled(bool enabled)
{
bool currentlyEnabled = isLocalConnectionsEnabled();
if (!currentlyEnabled && enabled) {
mLocal = new QLocalServer(this);
if (!mLocal->listen("queue")) {
qFatal("Failed to initialized event queue");
}
connect(mLocal, &QLocalServer::newConnection, mLocal, [&]() {
auto socket = mLocal->nextPendingConnection();
ConnectionId connId;
connId.index = Private::findFreeConnectionObj(*this);
auto& connObj = mConnections[connId.index];
connId.generation = connObj.generation++;
connObj.type = Connection::LocalSocket;
connObj.localSocket = socket;
connect(socket, &QLocalSocket::disconnected, socket, &QObject::deleteLater);
connect(socket, &QLocalSocket::disconnected, this, [this, connId]() {
mConnections[connId.index].markEmpty();
});
connect(socket, &QLocalSocket::readyRead, this, [this, socket, connId]() {
while (socket->canReadLine()) {
auto line = socket->readLine();
QJsonParseError error;
auto msg = QJsonDocument::fromJson(line, &error);
if (error.error != QJsonParseError::NoError) {
qWarning() << "Invalid message from client: " << error.errorString();
qWarning() << "Message: " << QString(line);
} else {
qDebug() << QString(line);
}
emit messageRecieved(msg, connId);
}
});
emit connectionEstablished(connId);
});
} else if (currentlyEnabled && !enabled) {
mLocal->deleteLater();
mLocal = nullptr;
}
}
void ConnectionManager::replyMessage(ConnectionId id, const QJsonDocument& message)
{
if (id.index < 0 || id.index >= mConnections.size()) {
return;
}
auto& conn = mConnections[id.index];
if (id.generation != conn.generation) {
return;
}
switch (conn.type) {
case Connection::Empty: return;
case Connection::LocalSocket: {
auto socket = conn.localSocket;
socket->write(message.toJson(QJsonDocument::Compact));
socket->flush();
} break;
}
}
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