private static bool validateStatus(StatusHandler statusHandler, AutomatedBackupsForm automatedBackupsForm)
{
if (statusHandler == null)
{
automatedBackupsForm.AppendText("Done. All books have been processed");
return(false);
}
if (statusHandler.HasErrors)
{
automatedBackupsForm.AppendText("ERROR. All books have not been processed. Most recent valid book: processing failed");
foreach (var errorMessage in statusHandler.Errors)
{
automatedBackupsForm.AppendText(errorMessage);
}
return(false);
}
if (!automatedBackupsForm.KeepGoing)
{
if (automatedBackupsForm.KeepGoingVisible && !automatedBackupsForm.KeepGoingChecked)
{
automatedBackupsForm.AppendText("'Keep going' is unchecked");
}
return(false);
}
return(true);
}
private static AutomatedBackupsForm attachToBackupsForm(IDownloadableProcessable downloadable)
{
#region create form
var automatedBackupsForm = new AutomatedBackupsForm();
#endregion
#region define how model actions will affect form behavior
void begin(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Begin: {libraryBook.Book}");
void statusUpdate(object _, string str) => automatedBackupsForm.AppendText("- " + str);
// extra line after book is completely finished
void completed(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Completed: {libraryBook.Book}{Environment.NewLine}");
#endregion
#region subscribe new form to model's events
downloadable.Begin += begin;
downloadable.StatusUpdate += statusUpdate;
downloadable.Completed += completed;
#endregion
#region when form closes, unsubscribe from model's events
// unsubscribe so disposed forms aren't still trying to receive notifications
automatedBackupsForm.FormClosing += (_, __) =>
{
downloadable.Begin -= begin;
downloadable.StatusUpdate -= statusUpdate;
downloadable.Completed -= completed;
};
#endregion
return(automatedBackupsForm);
}
private static AutomatedBackupsForm attachToBackupsForm(BackupBook backupBook)
{
#region create form
var automatedBackupsForm = new AutomatedBackupsForm();
#endregion
#region define how model actions will affect form behavior
void downloadBookBegin(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Download Step, Begin: {libraryBook.Book}");
void statusUpdate(object _, string str) => automatedBackupsForm.AppendText("- " + str);
void downloadBookCompleted(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Download Step, Completed: {libraryBook.Book}");
void decryptBookBegin(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Decrypt Step, Begin: {libraryBook.Book}");
// extra line after book is completely finished
void decryptBookCompleted(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"Decrypt Step, Completed: {libraryBook.Book}{Environment.NewLine}");
void downloadPdfBegin(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"PDF Step, Begin: {libraryBook.Book}");
// extra line after book is completely finished
void downloadPdfCompleted(object _, LibraryBook libraryBook) => automatedBackupsForm.AppendText($"PDF Step, Completed: {libraryBook.Book}{Environment.NewLine}");
#endregion
#region subscribe new form to model's events
backupBook.DownloadBook.Begin += downloadBookBegin;
backupBook.DownloadBook.StatusUpdate += statusUpdate;
backupBook.DownloadBook.Completed += downloadBookCompleted;
backupBook.DecryptBook.Begin += decryptBookBegin;
backupBook.DecryptBook.StatusUpdate += statusUpdate;
backupBook.DecryptBook.Completed += decryptBookCompleted;
backupBook.DownloadPdf.Begin += downloadPdfBegin;
backupBook.DownloadPdf.StatusUpdate += statusUpdate;
backupBook.DownloadPdf.Completed += downloadPdfCompleted;
#endregion
#region when form closes, unsubscribe from model's events
// unsubscribe so disposed forms aren't still trying to receive notifications
automatedBackupsForm.FormClosing += (_, __) =>
{
backupBook.DownloadBook.Begin -= downloadBookBegin;
backupBook.DownloadBook.StatusUpdate -= statusUpdate;
backupBook.DownloadBook.Completed -= downloadBookCompleted;
backupBook.DecryptBook.Begin -= decryptBookBegin;
backupBook.DecryptBook.StatusUpdate -= statusUpdate;
backupBook.DecryptBook.Completed -= decryptBookCompleted;
backupBook.DownloadPdf.Begin -= downloadPdfBegin;
backupBook.DownloadPdf.StatusUpdate -= statusUpdate;
backupBook.DownloadPdf.Completed -= downloadPdfCompleted;
};
#endregion
return(automatedBackupsForm);
}
private static async Task runSingleBackupAsync(IProcessable processable, AutomatedBackupsForm automatedBackupsForm, string productId)
{
automatedBackupsForm.Show();
try
{
var statusHandler = await processable.ProcessSingleAsync(productId);
validateStatus(statusHandler, automatedBackupsForm);
}
catch (Exception ex)
{
automatedBackupsForm.AppendError(ex);
}
automatedBackupsForm.FinalizeUI();
}
// automated backups looper feels like a composible IProcessable: logic, UI, begin + process child + end
// however the process step doesn't follow the pattern: Validate(product) + Process(product)
private static async Task runBackupLoopAsync(IProcessable processable, AutomatedBackupsForm automatedBackupsForm)
{
automatedBackupsForm.Show();
try
{
var shouldContinue = true;
while (shouldContinue)
{
var statusHandler = await processable.ProcessFirstValidAsync();
shouldContinue = validateStatus(statusHandler, automatedBackupsForm);
}
}
catch (Exception ex)
{
automatedBackupsForm.AppendError(ex);
}
automatedBackupsForm.FinalizeUI();
}
