/// <summary>
/// Update the currently selected item by appending new text.
/// </summary>
/// <param name="_selectedFileObject">The file selected in the ListBox.</param>
/// <param name="fileText">The updated text contents of the file.</param>
/// <returns>A Boolean value that indicates whether the text file was successfully updated.</returns>
internal async Task <bool> UpdateTextFileAsync(FileSystemItemViewModel _selectedFileObject, string fileText)
{
File file;
byte[] byteArray;
bool isSuccess = false;
try {
// Get a handle on the selected item.
IItem myFile = _selectedFileObject.FileSystemItem;
file = myFile as File;
string updateTime = "\n\r\n\rLast update at " + DateTime.Now.ToLocalTime().ToString();
byteArray = Encoding.UTF8.GetBytes(fileText + updateTime);
using (MemoryStream stream = new MemoryStream(byteArray)) {
// Update the file. This results in a call to the service.
await file.UploadAsync(stream);
isSuccess = true; // We've updated the file.
}
} catch (ArgumentException) {
isSuccess = false;
}
return(isSuccess);
}
/// <summary>
/// Performs a search of the default Documents folder. Displays the first page of results.
/// </summary>
/// <returns>A collection of information that describes files and folders.</returns>
internal async Task <List <FileSystemItemViewModel> > GetMyFilesAsync()
{
var fileResults = new List <FileSystemItemViewModel>();
try
{
var restURL = string.Format("{0}me/drive/root/children", AuthenticationHelper.ResourceBetaUrl);
string responseString = await AuthenticationHelper.GetJsonAsync(restURL);
if (responseString != null)
{
var jsonresult = JObject.Parse(responseString);
foreach (var item in jsonresult["value"])
{
FileSystemItemViewModel fileItemModel = new FileSystemItemViewModel();
fileItemModel.Name = !string.IsNullOrEmpty(item["name"].ToString()) ? item["name"].ToString() : string.Empty;
fileItemModel.LastModifiedBy = !string.IsNullOrEmpty(item["lastModifiedBy"]["user"]["displayName"].ToString()) ? item["lastModifiedBy"]["user"]["displayName"].ToString() : string.Empty;
fileItemModel.LastModifiedDateTime = !string.IsNullOrEmpty(item["lastModifiedDateTime"].ToString()) ? DateTime.Parse(item["lastModifiedDateTime"].ToString()) : new DateTime();
fileItemModel.Id = !string.IsNullOrEmpty(item["id"].ToString()) ? item["id"].ToString() : string.Empty;
fileItemModel.Folder = item["folder"] != null ? item["folder"].ToString() : string.Empty;
fileResults.Add(fileItemModel);
}
}
}
catch (Exception el)
{
el.ToString();
}
return(fileResults.OrderBy(e => e.Name).ToList());
}
/// <summary>
/// Performs a search of the default Documents folder. Displays the first page of results.
/// </summary>
/// <returns>A collection of information that describes files and folders.</returns>
internal async Task <List <FileSystemItemViewModel> > GetMyFilesAsync()
{
var fileResults = new List <FileSystemItemViewModel>();
try
{
var graphClient = await AuthenticationHelper.GetGraphServiceClientAsync();
var driveItems = await graphClient.Me.Drive.Root.Children.Request().GetAsync();
foreach (var item in driveItems)
{
FileSystemItemViewModel fileItemModel = new FileSystemItemViewModel();
fileItemModel.Name = item.Name;
fileItemModel.LastModifiedBy = item.LastModifiedBy.User.DisplayName;
fileItemModel.LastModifiedDateTime = item.LastModifiedDateTime.GetValueOrDefault(new DateTime());
fileItemModel.Id = item.Id;
fileItemModel.Folder = item.Folder != null?item.Folder.ToString() : string.Empty;
fileResults.Add(fileItemModel);
}
}
catch (Exception el)
{
el.ToString();
}
return(fileResults.OrderBy(e => e.Name).ToList());
}
/// <summary>
/// Deletes the selected item or folder from the ListBox.
/// </summary>
/// <returns>A Boolean value that indicates whether the file or folder was successfully deleted.</returns>
internal async Task <bool?> DeleteFileOrFolderAsync(FileSystemItemViewModel _selectedFileObject)
{
bool?isSuccess = false;
try
{
// Gets the FileSystemItem that is selected in the bound ListBox control.
IItem fileOrFolderToDelete = _selectedFileObject.FileSystemItem;
// This results in a call to the service.
await fileOrFolderToDelete.DeleteAsync();
isSuccess = true;
}
catch (Microsoft.Data.OData.ODataErrorException)
{
isSuccess = null;
}
catch (NullReferenceException)
{
isSuccess = null;
}
return(isSuccess);
}
/// <summary>
/// Downloads a file selected in the ListBox control.
/// </summary>
/// <param name="_selectedFileObject">The file selected in the ListBox.</param>
/// <returns>A Stream of the downloaded file.</returns>
internal async Task <Stream> DownloadFileAsync(FileSystemItemViewModel _selectedFileObject)
{
File file;
Stream stream = null;
try {
// Get a handle on the selected item.
IItem myFile = _selectedFileObject.FileSystemItem;
file = myFile as File;
// Download the file from the service. This results in call to the service.
stream = await file.DownloadAsync();
} catch (NullReferenceException) {
// Silently fail. A null stream will be handled higher up the stack.
}
return(stream);
}
private static ContextMenu BuildNewContextMenu(FileSystemItemViewModel item)
{
var contextMenu = new ContextMenu();
contextMenu.Items.Add(new MenuItem {
Header = "Open",
CommandParameter = item,
Command = new DelegateCommand <FileSystemItemViewModel>(i => i.Open())
});
var openWith = new MenuItem {
Header = "Open With"
};
openWith.Items.Add(new MenuItem {
Header = "App 1..."
});
contextMenu.Items.Add(openWith);
// Move to trash
contextMenu.Items.Add(new MenuItem {
Header = "Move to Trash",
CommandParameter = item,
Command = new DelegateCommand <FileSystemItemViewModel>(i => i.MoveToTrash())
});
// Others
contextMenu.Items.Add(new Separator());
contextMenu.Items.Add(new MenuItem {
Header = "Get Info"
});
contextMenu.Items.Add(new MenuItem {
Header = "Rename"
});
contextMenu.Items.Add(new MenuItem {
Header = $"Compress \"{item.DisplayName}\""
});
contextMenu.Items.Add(new MenuItem {
Header = "Duplicate"
});
contextMenu.Items.Add(new MenuItem {
Header = "Make Alias"
});
return(contextMenu);
}
/// <summary>
/// Reads the contents of a text file and displays the results in a TextBox.
/// </summary>
/// <param name="_selectedFileObject">The file selected in the ListBox.</param>
/// <returns>A Boolean value that indicates whether the text file was successfully read.</returns>
internal async Task <object[]> ReadTextFileAsync(FileSystemItemViewModel _selectedFileObject)
{
string fileContents = string.Empty;
object[] results = new object[] { fileContents, false };
try
{
// Get a handle on the selected item.
IItem myFile = _selectedFileObject.FileSystemItem;
// Check that the selected item is a text-based file.
if (!myFile.Name.EndsWith(".txt") && !myFile.Name.EndsWith(".xml"))
{
results[0] = string.Empty;
results[1] = false;
return(results);
}
File file = myFile as File;
// Download the file contents as a string. This results in a call to the service.
using (Stream stream = await file.DownloadAsync())
{
using (StreamReader reader = new StreamReader(stream))
{
results[0] = await reader.ReadToEndAsync();
results[1] = true;
}
}
}
catch (NullReferenceException)
{
results[1] = false;
}
catch (ArgumentException)
{
results[1] = false;
}
return(results);
}
public static FolderViewModel CreateFolderViewModel(Folder folder)
{
List <FileSystemItemViewModel> fileSystemItems = new List <FileSystemItemViewModel>();
foreach (var item in folder.FileSystemItems)
{
FileSystemItemViewModel file = new FileSystemItemViewModel
{
Id = item.Id,
Name = item.Name,
FileSystemItemType = item.FileSystemItemType
};
fileSystemItems.Add(file);
}
FolderViewModel folderViewModel = new FolderViewModel
{
ParentId = folder.ParentId,
FullName = folder.FullName,
NumberOfFiles = folder.NumberOfFiles,
FileSystemItems = fileSystemItems.OrderBy(i => i.FileSystemItemType).ThenBy(i => i.Name).ToList()
};
return(folderViewModel);
}
private void PushPane(FileSystemItemViewModel item)
{
IFileSystemPane pane;
switch (item)
{
case DirectoryViewModel directory:
// Open directory listing pane
var directoryPane = new DirectoryListingPane(directory);
// Subscribe to events
directoryPane.MouseDoubleClick += DirectoryListingPane_MouseDoubleClick;
directoryPane.PreviewKeyDown += DirectoryListingPane_PreviewKeyDown;
directoryPane.KeyDown += DirectoryListingPane_KeyDown;
directoryPane.SelectionChanged += DirectoryListingPane_SelectionChanged;
pane = directoryPane;
// Add a breadcrumb
if (_panes.Count > 0)
{
StackPanelBreadcrumbs.Children.Add(new TextBlock {
Text = ">",
Height = 18,
VerticalAlignment = VerticalAlignment.Center,
Margin = new Thickness(4, 0, 4, 0)
});
}
var breadcrumbIcon = new Image {
Source = directory.Icon,
Width = 18, Height = 18, // Smaller than the icons in the title bar and directory listings
VerticalAlignment = VerticalAlignment.Center
};
StackPanelBreadcrumbs.Children.Add(breadcrumbIcon);
var breadcrumbTextBlock = new TextBlock {
Text = directory.DisplayName, // TODO: Use same ellipsis as in directory listing item
Height = 18,
Margin = new Thickness(4, 0, 0, 0),
VerticalAlignment = VerticalAlignment.Center
};
StackPanelBreadcrumbs.Children.Add(breadcrumbTextBlock);
break;
case FileViewModel file:
// Open file preview pane
pane = new FileInfoPane(file);
break;
default:
throw new NotSupportedException($"{item.GetType()} doesn't have a corresponding Pane");
}
// Add a grid splitter for resizing if this isn't the first pane
if (_panes.Count > 0)
{
AddGridSplitter(width: 5);
}
// Add the pane
GridMain.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(260, GridUnitType.Pixel) // Panes' widths are in pixels, but resizable
});
Grid.SetColumn((UIElement)pane, GridMain.ColumnDefinitions.Count - 1); // Set column position in the main grid
_panes.Add(pane); // Add to stack
GridMain.Children.Add((UIElement)pane); // Add to main grid
// Scroll to the end horizontally
ScrollViewerMain.ScrollToRightEnd();
}
