Remove TCP entry point (#1007)

* Remove TCP entry point

Resolve #987

* Remove TCP entry point
  * Servers that do not support WebSocket will be marked as `Legacy`
  * Removal of TCP connection from the master will follow later.

* Tweaked error message

1 files changed, 43 insertions, 0 deletions

diff --git a/src/network/websocketconnection.h b/src/network/websocketconnection.h
new file mode 100644
index 00000000..9df9a49b
--- /dev/null
+++ b/src/network/websocketconnection.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include "aopacket.h"
+#include "serverinfo.h"
+
+#include <QObject>
+#include <QWebSocket>
+
+class AOApplication;
+
+class WebSocketConnection : public QObject
+{
+  Q_OBJECT
+
+public:
+  explicit WebSocketConnection(AOApplication *ao_app, QObject *parent = nullptr);
+  virtual ~WebSocketConnection();
+
+  bool isConnected();
+
+  void connectToServer(const ServerInfo &server);
+  void disconnectFromServer();
+
+  void sendPacket(AOPacket packet);
+
+Q_SIGNALS:
+  void connectedToServer();
+  void disconnectedFromServer();
+  void errorOccurred(QString error);
+
+  void receivedPacket(AOPacket packet);
+
+private:
+  AOApplication *ao_app;
+
+  QWebSocket *m_socket;
+  QAbstractSocket::SocketState m_last_state;
+
+private Q_SLOTS:
+  void onError();
+  void onStateChanged(QAbstractSocket::SocketState state);
+  void onTextMessageReceived(QString message);
+};