internal async Task GenerateChecksumsAsync(CancellationTokenSource tokenSource)
{
try
{
Log($"{nameof(TreeChecksumViewModel)}.{nameof(GenerateChecksumsAsync)}: Start");
IHashAlgorithim algorithim = HashAlgorithimFactory.Get(SelectedAlgorithim);
Hasher hasher = new Hasher(algorithim);
m_CancellationTokenSource = tokenSource;
CancellationToken token = tokenSource.Token;
token.ThrowIfCancellationRequested();
m_GenerationInProgress = true;
foreach (DirectoryItem childNode in RootNode.Items)
{
await GenerateChecksumAsync(childNode, hasher, token);
}
}
finally
{
Log($"{nameof(TreeChecksumViewModel)}.{nameof(GenerateChecksumsAsync)}: End");
m_GenerationInProgress = false;
m_CancellationTokenSource.Dispose();
}
}
internal async Task ComputeChecksumAsync()
{
Log($"{nameof(FileChecksumViewModel)}.{nameof(ComputeChecksumAsync)}: Start");
IHashAlgorithim algorithim = HashAlgorithimFactory.Get(SelectedAlgorithim);
Hasher hasher = new Hasher(algorithim);
string checksum = string.Empty;
bool?result = await Task.Run(() => hasher.TryGetFileChecksum(SelectedItem.FullyQualifiedFilename, out checksum));
if (result.HasValue &&
result.Value)
{
ComputedChecksum = checksum;
}
else
{
Log($" There was no result from the hashing.");
}
Log($"{nameof(FileChecksumViewModel)}.{nameof(ComputeChecksumAsync)}: End");
}
private async void Application_Startup(object sender, StartupEventArgs e)
{
StringBuilder sb = new StringBuilder();
Log($"Application name: \"{AppDomain.CurrentDomain.FriendlyName}\".");
if (e.Args.Length > 0)
{
// To start off, let's print all given arguments for
// debugging's sake.
int count = 0;
foreach (string arg in e.Args)
{
sb.AppendLine($" Argument {++count}: \"{arg}\".");
}
Log(sb.ToString());
// If the user just wants to see the help, print and exit.
if (e.Args[0].Equals(m_Help_1, StringComparison.OrdinalIgnoreCase) ||
e.Args[0].Equals(m_Help_2, StringComparison.OrdinalIgnoreCase) ||
e.Args[0].Equals(m_Help_3, StringComparison.OrdinalIgnoreCase))
{
ShowUsage();
Shutdown(SUCCESS);
return;
}
// The correct number of arguments were not supplied. Print help
// and exit.
if (e.Args.Length != NumberOfRequiredArguments)
{
ShowUsage();
Shutdown(FAILURE);
return;
}
// First agrument should be the source directory.
string directoryToParse = e.Args[0];
if (Directory.Exists(directoryToParse) == false)
{
LogError($"The directory \"{directoryToParse}\" does not exist.");
ShowUsage();
Shutdown(FAILURE);
return;
}
// Second argument should be the results file.
string resultsFile = e.Args[1];
// Third argument should be which algorithim to use for the checksum.
IHashAlgorithim hashAlgorithim = null;
try
{
hashAlgorithim = GetAlgorithim(e.Args[2]);
}
catch (Exception ex)
{
LogError($"The checksum algorithim could not be determined from the argument \"{e.Args[2]}\"..");
LogError(ex.Message);
ShowUsage();
Shutdown(FAILURE);
return;
}
// Fourth argument is the export format.
IFileExport fileExport = null;
try
{
fileExport = GetExport(e.Args[3]);
}
catch (Exception ex)
{
LogError($"The export format could not be determined from the argument \"{e.Args[3]}\"..");
LogError(ex.Message);
ShowUsage();
Shutdown(FAILURE);
return;
}
ViewModels.DirectoryViewModel vm = new ViewModels.DirectoryViewModel(null)
{
DirectoryToParse = directoryToParse
};
await vm.ParseAsync();
await vm.ExportAsync(resultsFile);
Shutdown(SUCCESS);
return;
}
else
{
ShowUsage();
Views.MainWindow mainWindow = new Views.MainWindow();
mainWindow.Show();
}
}
/// <summary>
/// Shows the previous page with the given transition.
/// </summary>
/// <param name="transitionType">
/// </param>
internal void ShowPreviousPage(
PageTransitionType transitionType = PageTransitionType.SlideBackAndFade,
object additionalData = null)
{
Log($"{nameof(MainWindowViewModel)}.{nameof(ShowPreviousPage)}: Start");
UserControl newPageControl = null;
if (m_PageList.Count > 0)
{
newPageControl = m_PageList.Pop();
Log($" Removed {newPageControl} from stack.");
if (m_PageList.Count == 1)
{
Log(" There is now 1 item in the stack.");
}
else
{
Log($" There are now {m_PageList.Count} items in the stack.");
}
}
else
{
Log($" The page list stack is empty.");
}
if (m_PageList.Count > 0)
{
newPageControl = m_PageList.Peek();
Log($" New page is {newPageControl}.");
}
if (additionalData != null)
{
if (newPageControl is DirectoryView)
{
IHashAlgorithim hashAlgorithim = ((ChecksumAlgorithim)additionalData).GetAlgorithimInterface();
((DirectoryView)newPageControl).SetHashAlgorithim(hashAlgorithim);
}
}
// Set back button text.
if (newPageControl is null)
{
newPageControl = new DirectoryView(this);
}
CurrentPage = GetPageEnumerationType(newPageControl);
m_PageTransition.TransitionType = transitionType;
m_PageTransition.ShowPage(newPageControl);
ShowStatusMessage(string.Empty, false);
Log($"{nameof(MainWindowViewModel)}.{nameof(ShowPreviousPage)}: End");
}
public Hasher(IHashAlgorithim algorithim)
{
m_Algorithim = algorithim;
}
public void SetHashAlgorithim(IHashAlgorithim hashAlgorithim)
{
m_ViewModel.HashAlgorithim = hashAlgorithim;
}