GermanAirlinesVA-GAConnector/esp/main.cpp

#include "include/main.h"

bool connectedToSim = false;

// The Window Procedure
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  static UINT s_uTaskbarRestart;

  switch (msg) {
    case WM_CREATE:
      s_uTaskbarRestart = RegisterWindowMessage(TEXT("TaskbarCreated"));
      break;
    case WM_CLOSE: {
      toLog("Close");
      DestroyWindow(hWnd);
      break;
    }
    case WM_DESTROY: {
      toLog("Destroy");
      removeNotifyIcon(hWnd);
      UnregisterClass(WINDOW_CLASS, GetModuleHandle(NULL));
      PostQuitMessage(0);
      break;
    }
    case TRAY_MESSAGE: {
      switch (lParam) {
        case WM_RBUTTONUP:
        case WM_CONTEXTMENU: {
          const int IDM_EXIT = 100;
          POINT pt;
          GetCursorPos(&pt);

          HMENU hMenu = CreatePopupMenu();
          AppendMenu(hMenu, MF_STRING | MF_GRAYED, NULL, "Version: " BIT);
          if (connectedToSim) {
            AppendMenu(hMenu, MF_STRING | MF_GRAYED, NULL, "Connected to Sim");
          }
          AppendMenu(hMenu, MF_SEPARATOR, NULL, NULL);
          AppendMenu(hMenu, MF_STRING, IDM_EXIT, "Exit");

          SetForegroundWindow(hWnd);

          WINBOOL cmd = TrackPopupMenu(hMenu,
                                       TPM_LEFTALIGN | TPM_LEFTBUTTON |
                                           TPM_BOTTOMALIGN | TPM_RETURNCMD,
                                       pt.x,
                                       pt.y,
                                       0,
                                       hWnd,
                                       NULL);

          if (cmd == IDM_EXIT) {
            PostMessage(hWnd, WM_CLOSE, 0, NULL);
          }

          DestroyMenu(hMenu);
          break;
        }
      }
      break;
    }
    default: {
      if (msg == s_uTaskbarRestart) {
        addNotifyIcon(hWnd);
      }
      break;
    }
  }
  return DefWindowProc(hWnd, msg, wParam, lParam);
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-parameter"
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
  HANDLE simConnect;
  HRESULT hr;
  WNDCLASS wc;
  ZeroMemory(&wc, sizeof(WNDCLASS));
  HWND hWnd;
  MSG msg;

  // Exit if already running
  hWnd = FindWindow(WINDOW_CLASS, WINDOW_CLASS);
  if (hWnd != NULL) {
    toLog("Exiting duplicate");
    return 0;
  }

  // Clear log
  std::ofstream clearLog(BASE_DIRECTORY "log.txt");
  clearLog.close();

  // Registering the Window Class
  wc.lpfnWndProc = WndProc;
  wc.hInstance = hInstance;
  wc.lpszClassName = WINDOW_CLASS;

  if (!RegisterClass(&wc)) {
    toLog("Error window register: " + std::to_string(GetLastError()));
    return 0;
  }

  // Creating the Window
  hWnd = CreateWindow(WINDOW_CLASS,
                      WINDOW_CLASS,
                      WS_OVERLAPPEDWINDOW,
                      CW_USEDEFAULT,
                      CW_USEDEFAULT,
                      240,
                      120,
                      NULL,
                      NULL,
                      hInstance,
                      NULL);

  if (hWnd == NULL) {
    toLog("Error window create: " + std::to_string(GetLastError()));
    return 0;
  }

  // Add Notify Icon
  if (!addNotifyIcon(hWnd)) {
    toLog("Error notifyIcon: " + std::to_string(GetLastError()));
    return 0;
  }

  // Never show window
  // ShowWindow(hWnd, SHOW_OPENWINDOW);

  hr = SimConnect_Open(&simConnect, "GAConnector", hWnd, NULL, NULL, NULL);
  if (hr == E_FAIL) {
    toLog("SimConnect_Open failed");
  } else {
    connectedToSim = true;
  }

  // The Message Loop
  while (GetMessage(&msg, NULL, 0, 0) > 0) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }

  // Exit
  SimConnect_Close(&simConnect);
  toLog("Bye");
  return msg.wParam;
}
#pragma clang diagnostic pop

WINBOOL addNotifyIcon(HWND hWnd)
{
  HICON icon;
  NOTIFYICONDATA niData;
  ZeroMemory(&niData, sizeof(NOTIFYICONDATA));

  icon = (HICON)LoadImage(GetModuleHandle(NULL),
                          MAKEINTRESOURCE(APP_ICON),
                          IMAGE_ICON,
                          GetSystemMetrics(SM_CXSMICON),
                          GetSystemMetrics(SM_CYSMICON),
                          LR_SHARED);
  if (icon == NULL) {
    toLog("error icon " + std::to_string(GetLastError()));
  }
  niData.cbSize = sizeof(NOTIFYICONDATA);
  niData.uVersion = NOTIFYICON_VERSION_4;
  niData.uID = TRAY_ICON_ID;
  niData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
  strcpy(niData.szTip, "GA Connector");
  niData.hIcon = icon;
  niData.hWnd = hWnd;
  niData.uCallbackMessage = TRAY_MESSAGE;

  WINBOOL retVal = Shell_NotifyIcon(NIM_ADD, &niData);
  // DestroyIcon(niData.hIcon);

  return retVal;
}

WINBOOL removeNotifyIcon(HWND hWnd)
{
  NOTIFYICONDATA niData;
  ZeroMemory(&niData, sizeof(NOTIFYICONDATA));

  niData.cbSize = sizeof(NOTIFYICONDATA);
  niData.uID = TRAY_ICON_ID;
  niData.hWnd = hWnd;
  return Shell_NotifyIcon(NIM_DELETE, &niData);
}

void toLog(const std::string &message)
{
  std::time_t utc = std::time(nullptr);
  std::tm *time = std::gmtime(&utc);
  std::ofstream msg(BASE_DIRECTORY "log.txt", std::ofstream::app);
  msg << std::put_time(time, "%Y-%m-%d %H:%M:%S UTC ")
      << "German Airlines VA: " << message << std::endl;
}