Initial commit

Lts/Proxies/TrainingAreaBase/Plugins/HlaJson/hla_dispatcher.cpp

@@ -0,0 +1,114 @@
+/**
+  * Send / Receive telegrams to/from Hla
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2016-09-26
+  */
+
+#include "hla_dispatcher.h"
+#include "hla_handler_rx.h"
+#include "hla_handler_tx.h"
+
+#include <QSettings>
+#include <QWebSocket>
+#include <QTimer>
+#include <nglsettings/nglsettings_settings.h>
+
+namespace HlaJson
+{
+HlaDispatcher::HlaDispatcher(TrainingAreaBase::Plugin::DataProvider *pdp,
+                             const std::shared_ptr<TrainingAreaBase::RecvFromTab> &recvFromTabCb,
+                             NGL::Settings *settings)
+  : m_recvFromTabCb(recvFromTabCb)
+  , m_recvFromHla(std::make_shared<HlaHandlerRx>(recvFromTabCb, this))
+  , m_sendToHla(std::make_shared<HlaHandlerTx>(pdp))
+  , m_settings(settings)
+  , m_webSocket(new QWebSocket(QString(), QWebSocketProtocol::VersionLatest, this))
+  , m_webSocketReconnectTimer(new QTimer(this))
+  , m_bWarnedOnce(false)
+  , m_logger(getLogger("HlaDispatcher"))
+{
+  connect(m_webSocket, QOverload<QAbstractSocket::SocketError>::of(&QWebSocket::error),
+          this, &HlaDispatcher::onWebSocketError);
+  connect(m_webSocket, &QWebSocket::connected,
+          this, &HlaDispatcher::onHlaConnected);
+  connect(m_webSocket, &QWebSocket::disconnected,
+          this, &HlaDispatcher::onHlaDisconnected);
+  connect(m_webSocket, &QWebSocket::textMessageReceived,
+          this, &HlaDispatcher::onTextMessageReceived);
+  connect(m_webSocketReconnectTimer, &QTimer::timeout,
+          this, &HlaDispatcher::init);
+  connect(m_recvFromHla.get(), &HlaHandlerRx::participantConnectionState,
+          m_sendToHla.get(), &HlaHandlerTx::onParticipantConnectionState);
+}
+
+bool HlaDispatcher::init()
+{
+  // TODO
+  const QUrl url(webSocketUrl());
+  if (!m_bWarnedOnce)
+    NOTICE_LOG(m_logger) << "Using WebSocket url: " << url.toString();
+  m_webSocket->open(url);
+  return true;
+}
+
+std::shared_ptr<TrainingAreaBase::SendToTab> HlaDispatcher::sendToTab()
+{
+  return std::static_pointer_cast<TrainingAreaBase::SendToTab>(m_sendToHla);
+}
+
+bool HlaDispatcher::canSendData() const
+{
+  return m_webSocket && m_webSocket->state() == QAbstractSocket::ConnectedState;
+}
+
+void HlaDispatcher::onHlaConnected()
+{
+  QWebSocket *ws = qobject_cast<QWebSocket *>(sender());
+  m_sendToHla->onHlaConnected(ws);
+  m_webSocketReconnectTimer->stop();
+  m_bWarnedOnce = false;
+}
+
+void HlaDispatcher::onHlaDisconnected()
+{
+  INFO_LOG(m_logger) << "Hla socket disconnected";
+  m_webSocketReconnectTimer->start(5000);
+  m_sendToHla->onHlaDisconnected();
+
+  emit connectionState(QString::fromUtf8(name()), false);
+}
+
+void HlaDispatcher::onHlaExternalConnectionStateChanged(bool bConnected)
+{
+  m_sendToHla->onHlaConnectedToExternalSystem(bConnected);
+  emit connectionState(QString::fromUtf8(name()), bConnected);
+}
+
+void HlaDispatcher::onWebSocketError()
+{
+  if (!m_webSocket)
+    return;
+  if (!m_bWarnedOnce)
+    WARNING_LOG(m_logger) << "Error connecting to " << webSocketUrl().toString() << ": " << m_webSocket->errorString();
+  m_webSocket->close();
+  m_webSocketReconnectTimer->start(5000);
+  m_bWarnedOnce = true;
+
+  emit connectionState(QString::fromUtf8(name()), false);
+}
+
+void HlaDispatcher::onTextMessageReceived(const QString &message)
+{
+  // convert from json to internal representation, send to TAB
+  m_recvFromHla->handleTelegram(message.toUtf8());
+}
+
+QUrl HlaDispatcher::webSocketUrl() const
+{
+  const quint16 port = m_settings->settings()->value(QStringLiteral("hla/webSocketListenPort"), 12347).toInt();
+  const QString addr = m_settings->settings()->value(QStringLiteral("hla/webSocketHostname"), QStringLiteral("localhost")).toString();
+  return QUrl(QStringLiteral("ws://%1:%2/").arg(addr).arg(port));
+}
+} // namespace HlaJson