Subversion Repositories Games.Chess Giants

// dialog_registration.cpp

#include "../common.h"

// dialog template

#define THIS_DIALOG DIALOG_REGISTER

// global variables used in this module only

static wchar_t transaction_uuid[128] = L"";

static bool was_donatebutton_clicked = false;

static HWND hThisDialogWnd = NULL;

// prototypes of local functions

static void RegistrationCheckThread (void *thread_parms);

static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam);

static bool RetrieveActivationCode (wchar_t *candidate_email_or_uuid, unsigned int *returned_code, wchar_t **returned_email, wchar_t **failure_reason);

void DialogBox_Registration (void)

{

   // helper function to fire up the modal dialog box

   // first, test if our server is reachable. We DO NOT want the user to donate if our server isn't here to receive the donation!

   if (!RetrieveActivationCode (NULL, NULL, NULL, NULL))

      return; // if it's not, don't display anything

   // generate a random transaction UUID for this session

   srand ((unsigned int) time (NULL));

   swprintf_s (transaction_uuid, sizeof (transaction_uuid), L"%04x%04x-%04x-%04x-%04x-%04x%04x%04x", rand (), rand (), rand (), (rand () & 0x0fff) | 0x4000, (rand () & 0x3fff) | 0x8000, rand (), rand (), rand ());

   // start a new thread that will ask every 10 seconds if our transaction ID has donated

   _beginthread (RegistrationCheckThread, 0, NULL); // fire up the thread

   // display the dialog box (set the parent to be the desktop)

   DialogBox (hAppInstance, MAKEINTRESOURCE (THIS_DIALOG), NULL, DialogProc_ThisDialog);

   return; // finished processing this dialog

}

static void RegistrationCheckThread (void *thread_parms)

{

   // thread entrypoint for the thread that periodically checks whether transaction_uuid has just donated

   unsigned int returned_code; // 32 bits minimum

   wchar_t *returned_email;

   // loop endlessly

   for (;;)

   {

      // query the remote server for the code associated with this transaction UUID

      if (RetrieveActivationCode (transaction_uuid, &returned_code, &returned_email, NULL) && IsRegistrationCorrect (returned_email, returned_code))

         break; // stop looping as soon as we get correct values

      Sleep (10 * 1000); // next check in 10 seconds

   }

   // the user just registered, save activation email and activation code

   wcscpy_s (options.registration.user_email, WCHAR_SIZEOF (options.registration.user_email), returned_email);

   options.registration.activation_code = returned_code;

   if (IsWindow (hThisDialogWnd))

      ShowWindow (hThisDialogWnd, SW_HIDE); // make the dialog box disappear

   MessageBox (NULL, LOCALIZE (L"Registration_ThankYou"), PROGRAM_NAME, MB_ICONINFORMATION | MB_OK); // display a "thank you" message

   was_donatebutton_clicked = false; // prevent the reminder dialog box to open

   if (IsWindow (hThisDialogWnd))

      PostMessage (hThisDialogWnd, WM_CLOSE, 0, 0); // then close the dialog box

   return; // _endthread() implied

}

static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam)

{

   // message handler for the dialog box

   static wchar_t temp_string[1024];

   unsigned short wParam_hiword;

   unsigned short wParam_loword;

   unsigned int returned_code; // 32 bits minimum

   wchar_t *failure_reason;

   int write_index;

   int read_index;

   int length;

   // filter out the commonly used message values

   wParam_hiword = HIWORD (wParam);

   wParam_loword = LOWORD (wParam);

   // have we just fired up this window ?

   if (message == WM_INITDIALOG)

   {

      hThisDialogWnd = hWnd; // save the dialog handle

      // center the window

      CenterWindow (hWnd, hMainWnd);

      // set dialog icons (small one for title bar & big one for task manager)

      SendMessage (hWnd, WM_SETICON, ICON_SMALL, (LPARAM) LoadIcon (hAppInstance, MAKEINTRESOURCE (ICON_MAIN)));

      SendMessage (hWnd, WM_SETICON, ICON_BIG, (LPARAM) LoadIcon (hAppInstance, MAKEINTRESOURCE (ICON_MAIN)));

      // set window title and control texts

      SetWindowText (hWnd, LOCALIZE (L"Registration_Title"));

      // set the static texts

      Static_SetText (GetDlgItem (hWnd, STATICTEXT_REGISTRATION_QUESTION), LOCALIZE (L"Registration_Question"));

      Static_SetText (GetDlgItem (hWnd, STATICTEXT_REGISTRATION_INSTRUCTIONS), LOCALIZE (L"Registration_Instructions"));

      // set email address font

      SendMessage (GetDlgItem (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS), WM_SETFONT, (WPARAM) GetStockObject (SYSTEM_FONT), 0);

      if (options.registration.user_email[0] != 0)

         SetDlgItemText (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS, options.registration.user_email);

      else

         SetDlgItemText (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS, LOCALIZE (L"Registration_YourEmailHere"));

      SetWindowText (GetDlgItem (hWnd, BUTTON_VALIDATECODE), LOCALIZE (L"Registration_ValidateCode"));

      Static_SetText (GetDlgItem (hWnd, STATICTEXT_REGISTRATION_STATUSBAR), LOCALIZE (L"Registration_StatusBar"));

      // set focus to the first settable item

      SendMessage (GetDlgItem (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS), EM_SETSEL, 0, -1); // select all text

      SetFocus (GetDlgItem (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS));

      // convert the Paypal bitmap and the status bar message to hyperlinks

      ConvertStaticToHyperlink (GetDlgItem (hWnd, BUTTON_DONATE));

      ConvertStaticToHyperlink (GetDlgItem (hWnd, STATICTEXT_REGISTRATION_STATUSBAR));

   }

   // else did we click the close button on the title bar ?

   else if (message == WM_CLOSE)

   {

      if (was_donatebutton_clicked)

      {

         MessageBox (hWnd, LOCALIZE (L"Registration_DontForget"), PROGRAM_NAME, MB_ICONWARNING | MB_OK); // users need to be reminded that they MUST write their email in the activation form

         SendMessage (GetDlgItem (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS), EM_SETSEL, 0, -1); // select all text

         SetFocus (GetDlgItem (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS)); // focus on the email address field

         was_donatebutton_clicked = false; // once is enough

         return (true); // prevent window close this time

      }

      else

         EndDialog (hWnd, 0); // close the dialog box

      hThisDialogWnd = NULL; // this window is about to no longer have a handle, so remember it

   }

   // else did we take action on one of the controls ?

   else if (message == WM_COMMAND)

   {

      // did we cancel the dialog box ? (IDCANCEL is a system-wide dialog box handler value, that catches the ESC key)

      if (wParam_loword == IDCANCEL)

         EndDialog (hWnd, 0); // close the dialog box

      // else did the user enter something in the edit boxes ?

      else if (wParam_hiword == EN_CHANGE)

      {

         // enable the validation button only if the PayPal email field has data

         GetDlgItemText (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS, temp_string, WCHAR_SIZEOF (temp_string));

         // strip spaces and unprintable characters from candidate email, and bring it lowercase

         length = wcslen (temp_string);

         write_index = 0;

         for (read_index = 0; read_index < length; read_index++)

            if (!iswspace (temp_string[read_index]))

            {

               temp_string[write_index] = tolower (temp_string[read_index]); // force lowercase

               write_index++; // keep only valid signs and discard spaces

            }

         temp_string[write_index] = 0; // ensure string is correctly terminated

         EnableWindow (GetDlgItem (hWnd, BUTTON_VALIDATECODE), ((temp_string[0] != 0) && (wcslen (temp_string) > 5) && (wcscmp (temp_string, LOCALIZE (L"Registration_YourEmailHere")) != 0)

                                                                && (wcschr (temp_string, L'@') != NULL) && (wcschr (temp_string, L'.') != NULL)));

      }

      // else was it the validation button ?

      else if (wParam_loword == BUTTON_VALIDATECODE)

      {

         // enable the validation button only if the PayPal email field has data

         GetDlgItemText (hWnd, EDITBOX_REGISTRATION_EMAILADDRESS, temp_string, WCHAR_SIZEOF (temp_string));

         // query the remote server for the code associated with this email. If it fails, ask why.

         if (!RetrieveActivationCode (temp_string, &returned_code, NULL, &failure_reason)

             || ((failure_reason != NULL) && (failure_reason[0] != 0)))

            MessageBox (hWnd, failure_reason, PROGRAM_NAME, MB_ICONERROR | MB_OK); // registration failed. Display an error and DON'T make the dialog box disappear

         // else is the retrieved data correct ?

         else if (IsRegistrationCorrect (temp_string, returned_code))

         {

            // if so, save activation email and activation code

            wcscpy_s (options.registration.user_email, WCHAR_SIZEOF (options.registration.user_email), temp_string);

            options.registration.activation_code = returned_code;

            MessageBox (hWnd, LOCALIZE (L"Registration_ThankYou"), PROGRAM_NAME, MB_ICONINFORMATION | MB_OK);

            was_donatebutton_clicked = false; // once is enough

            EndDialog (hWnd, 0); // then display a thank you dialog box and make the dialog box disappear

         }

         // else the supplied data is wrong

         else

         {

            swprintf_s (temp_string, WCHAR_SIZEOF (temp_string), LOCALIZE (L"Registration_Error"), AUTHOR_EMAIL);

            MessageBox (hWnd, temp_string, PROGRAM_NAME, MB_ICONERROR | MB_OK); // wrong activation. Display an error and DON'T make the dialog box disappear

         }

      }

      // else was it the PayPal button ?

      else if (wParam_loword == BUTTON_DONATE)

      {

         MessageBox (hWnd, LOCALIZE (L"Registration_DontForget"), PROGRAM_NAME, MB_ICONWARNING | MB_OK); // users need to be reminded that they MUST write their email in the activation form

         if (wcscmp (languages[language_id].name, L"French") == 0)

            wcscpy_s (temp_string, sizeof (temp_string), PAYPAL_URL_FR); // select the French PayPal page

         else

            wcscpy_s (temp_string, sizeof (temp_string), PAYPAL_URL_XX); // select the international (English) PayPal page

         wcscat_s (temp_string, sizeof (temp_string), transaction_uuid); // in all cases, append the transaction UUID that our server generated for us

         ShellExecute (NULL, L"open", temp_string, NULL, NULL, SW_MAXIMIZE); // open PayPal in the default browser, maximized

         was_donatebutton_clicked = true; // remember the user clicked the Donate button

      }

      // else was it the status bar hyperlink ?

      else if (wParam_loword == STATICTEXT_REGISTRATION_STATUSBAR)

         ShellExecute (NULL, L"open", PROGRAM_URL, NULL, NULL, SW_MAXIMIZE); // open the main page in the default browser, maximized

   }

   // call the default dialog message processing function to keep things going

   return (false);

}

static bool RetrieveActivationCode (wchar_t *candidate_email_or_uuid, unsigned int *returned_code, wchar_t **returned_email, wchar_t **failure_reason)

{

   // this function queries the remote server for registration status. If OK, the function returns TRUE and

   // the code and email are returned in the returned_code and returned_email pointers, and failure_reason

   // is set to point to a NULL string. On error, FALSE is returned and failure_reason points to the cause

   // of the error (localized). If candidate_email_or_uuid is a NULL string, only a server reachability test

   // is performed.

   #define REGISTRATION_HOST "pmbaty.com"

   #define REGISTRATION_SCRIPT "/chess/whatsmycode.php"

   static char http_buffer[1024]; // used both for request and reply

   static char ascii_email_or_uuid[128];

   static wchar_t wide_email[128];

   struct sockaddr_in service;

   struct hostent *hostinfo;

   char *data_start;

   int write_index;

   int read_index;

   int length;

   SOCKET s;

   // get our distribution server's IP address from the host name

   hostinfo = gethostbyname (REGISTRATION_HOST);

   if (hostinfo == NULL)

   {

      if (failure_reason != NULL)

         *failure_reason = LOCALIZE (L"Registration_NetworkFailure");

      return (false); // couldn't resolve hostname, return an error condition

   }

   // fill in the sockaddr server structure with the server hostinfo data

   service.sin_family = AF_INET;

   service.sin_addr.s_addr = inet_addr (inet_ntoa (*(struct in_addr *) hostinfo->h_addr_list[0]));

   service.sin_port = htons (80); // connect to webserver there (port 80)

   // create our socket

   if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET)

   {

      if (failure_reason != NULL)

         *failure_reason = LOCALIZE (L"Registration_NetworkFailure");

      return (0); // couldn't create socket, return an error condition

   }

   // connect to the distributor's webserver using that socket

   if (connect (s, (struct sockaddr *) &service, sizeof (service)) == -1)

   {

      closesocket (s);

      if (failure_reason != NULL)

         *failure_reason = LOCALIZE (L"Registration_NetworkFailure");

      return (0); // unable to connect to webserver, return an error condition

   }

   // build the HTTP query and send it

   if (candidate_email_or_uuid != NULL)

      ConvertTo7BitASCII (ascii_email_or_uuid, sizeof (ascii_email_or_uuid), candidate_email_or_uuid);

   sprintf_s (http_buffer, sizeof (http_buffer),

              "GET " REGISTRATION_SCRIPT "?%s=%s HTTP/1.1\r\n"

              "Host: " REGISTRATION_HOST "\r\n"

              "Connection: close\r\n"

              "\r\n",

              (candidate_email_or_uuid != NULL ? (wcschr (candidate_email_or_uuid, '@') != NULL ? "email" : "uuid") : "test"),

              (candidate_email_or_uuid != NULL ? ascii_email_or_uuid : "1"));

   length = strlen (http_buffer);

   write_index = send (s, http_buffer, length, 0); // send the HTTP query

   if (write_index != length)

   {

      closesocket (s);

      if (failure_reason != NULL)

         *failure_reason = LOCALIZE (L"Registration_NetworkFailure");

      return (0); // unable to send HTTP query, return an error condition

   }

   // read the reply (10 seconds timeout)

   http_buffer[0] = 0;

   read_index = RecvWithTimeout (s, 10.0f, http_buffer, sizeof (http_buffer), 0);

   if (read_index < 1)

   {

      closesocket (s);

      if (failure_reason != NULL)

         *failure_reason = LOCALIZE (L"Registration_NetworkFailure");

      return (0); // empty or erroneous HTTP reply, return an error condition

   }

   closesocket (s); // finished communicating, close TCP socket

   // terminate recv buffer and see where the useful data starts

   http_buffer[read_index] = 0;

   //MessageBoxA (NULL, http_buffer, "HTTP response", MB_OK);

   if (candidate_email_or_uuid == NULL)

   {

      if (failure_reason != NULL)

         *failure_reason = L""; // no error, set an empty string as the failure reason

      if ((data_start = strchr (http_buffer, '\n')) != NULL)

         *data_start = 0; // see where the first reply line ends and break the string there

      return ((strncmp (http_buffer, "HTTP/", 5) == 0) && (strstr (http_buffer, " 200 ") != NULL)); // reachability test only

   }

   else if ((data_start = strstr (http_buffer, "Success=")) != NULL)

   {

      if (failure_reason != NULL)

         *failure_reason = L""; // no error, set an empty string as the failure reason

      if (returned_code != NULL)

         *returned_code = (unsigned int) _atoi64 (&data_start[strlen ("Success=")]);

      if (returned_email != NULL)

      {

         data_start = strchr (data_start, ',');

         if (data_start != NULL)

         {

            if (strchr (data_start, '\r') != 0)

               *strchr (data_start, '\r') = 0; // don't report the newline

            ConvertToWideChar (wide_email, WCHAR_SIZEOF (wide_email), data_start + 1);

            *returned_email = wide_email;

         }

         else

            *returned_email = L"";

      }

      return (true); // and return the candidate code we got

   }

   else if ((data_start = strstr (http_buffer, "Error=")) != NULL)

   {

      if (failure_reason != NULL)

      {

         data_start += strlen ("Error=");

         if (strchr (data_start, '\r') != NULL) *strchr (data_start, '\r') = 0;

         if (strchr (data_start, '\n') != NULL) *strchr (data_start, '\n') = 0;

         if      (_stricmp (data_start, "WrongEmail") == 0)         *failure_reason = LOCALIZE (L"Registration_WrongEmail");

         else if (_stricmp (data_start, "UnknownEmail") == 0)       *failure_reason = LOCALIZE (L"Registration_UnknownEmail");

         else if (_stricmp (data_start, "TooManyActivations") == 0) *failure_reason = LOCALIZE (L"Registration_TooManyActivations");;

      }

      return (false); // server returned an error, return an error condition

   }

   if (failure_reason != NULL)

      *failure_reason = LOCALIZE (L"Registration_NetworkFailure"); // this should never happen

   return (false); // server returned an error, return an error condition

   #undef REGISTRATION_SCRIPT

   #undef REGISTRATION_HOST

}