private void KapchaBrowser_OnLoadCompleted(object sender, NavigationEventArgs e)
{
KapchaBrowser.InvokeScript("execScript", "document.body.style.overflow ='hidden'", "JavaScript");
CopyBrowserImageToClipboard();
LoadCopiedImageIntoImageControl();
void CopyBrowserImageToClipboard()
{
//https://stackoverflow.com/questions/2566898/save-images-in-webbrowser-control-without-redownloading-them-from-the-internet
var doc = (HTMLDocument)KapchaBrowser.Document;
var imgRange = (IHTMLControlRange)((HTMLBody)doc.body).createControlRange();
foreach (IHTMLImgElement img in doc.images)
{
imgRange.add((IHTMLControlElement)img);
imgRange.execCommand("Copy", false, null);
}
}
void LoadCopiedImageIntoImageControl()
{
//https://stackoverflow.com/questions/25749843/wpf-image-source-clipboard-getimage-is-not-displayed
if (!Clipboard.ContainsImage())
{
return;
}
var clipboardData = System.Windows.Forms.Clipboard.GetDataObject();
if (clipboardData == null)
{
return;
}
if (!clipboardData.GetDataPresent(System.Windows.Forms.DataFormats.Bitmap))
{
return;
}
var bitmap = (Bitmap)clipboardData.GetData(System.Windows.Forms.DataFormats.Bitmap);
var hBitmap = bitmap.GetHbitmap();
try {
KapchaImage.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap,
IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
}
finally {
DeleteObject(hBitmap);
}
}
}
private async void Browser_OnLoadCompleted(object sender, NavigationEventArgs e)
{
KapchaBrowser.Navigate(_urlProvider.KaptchaUrl);
ResetButton.IsEnabled = true;
string currentUrl = Browser.Source.ToString();
if (currentUrl == _urlProvider.EndUrl)
{
return;
}
if (currentUrl.Contains(_urlProvider.TestServerUrl))
{
ExtractData();
}
else if (_urlProvider.IsLoginFailed(currentUrl))
{
DisplayLoginFailedMessage();
}
else if (_urlProvider.IsAtLoginPage(currentUrl))
{
AssertLoginPageIsLoadedProperly();
}
else if (!currentUrl.Contains(_urlProvider.CourseTimetablePreviewUrl))
{
NavigateToCourseTimeTablePreview();
}
else if (currentUrl.Contains(_urlProvider.CourseTimetablePreviewUrl))
{
ExtractData();
}
#region NestedFunctions
void AssertLoginPageIsLoadedProperly()
{
string html = GetHtml(Browser);
if (!html.Contains("Course Registration System"))
{
Browser.Navigate(_urlProvider.LoginPageUrl);
}
}
void DisplayLoginFailedMessage()
{
Global.Snackbar.MessageQueue.Enqueue(
"Login failed. Please make sure you entered the correct information.");
NavigationService.Refresh();
CaptchaBox.Text = "";
_navigationCount = 0;
}
void NavigateToCourseTimeTablePreview()
{
Global.CurrentUser = new UserInfo(_studentIdInput, _passwordInput);
new UserInfoManager().SaveData(Global.CurrentUser);
_currentPage = 1;
if (_browsingToCourseTimetablePreview)
{
return;
}
if (_navigationCount < NavigationCountUpperLimit)
{
Browser.Navigate(_urlProvider.CourseTimetablePreviewUrl);
_navigationCount++;
}
else
{
Browser.Navigate(_urlProvider.LoginPageUrl);
CaptchaBox.Text = "";
ResetButton_OnClick(null, null);
Global.Snackbar.MessageQueue.Enqueue($"No record found.");
TryLoadAutoSavedData();
}
}
async void ExtractData()
{
string html = GetHtml(Browser);
DisplayLoadingBar(true);
await Task.Run(() => {
if (Global.Toggles.SaveLoadedHtmlToggle.IsToggledOn)
{
SaveToFile(html);
}
Global.InputSlotList.AddRange(new HtmlSlotParser().Parse(html));
Global.LoadedHtml += html;
TryGetStartDateAndEndDate(html);
});
if (CanGoToPage(_currentPage + 1))
{
Browser.InvokeScript("changePage", _currentPage + 1);
_currentPage++;
}
else
{
DisplayLoadingBar(false);
if (Global.InputSlotList.Count == 0)
{
DialogBox.Show("No data available.", "", "OK");
ResetButton_OnClick(null, null);
return;
}
Browser.Navigate(_urlProvider.EndUrl);
new UserSlotManager().SaveSlotDataAsync(Global.CurrentUser.UserId, Global.LoadedHtml);
NavigationService.Navigate(
Page_CreateTimetable.GetInstance(Global.Settings.SearchByConsideringWeekNumber,
Global.Settings.GeneralizeSlot));
}
#region NestedFunctions
bool CanGoToPage(int pageNumber)
{
dynamic doc = Browser.Document;
string htmlText = doc.documentElement.InnerHtml;
return(htmlText.Contains($"javascript:changePage(\'{pageNumber}\')"));
}
void TryGetStartDateAndEndDate(string input)
{
try {
var parser = new StartDateEndDateFinder(input);
Global.TimetableStartDate = parser.GetStartDate();
Global.TimetableEndDate = parser.GetEndDate();
}
catch { }
}
#endregion
}
#endregion
}
