/// <summary>
/// Download the primary mid sized thumbnail as a Sprite.
/// </summary>
/// <param name="drive">Target drive.</param>
/// <param name="itemId">Source item id.</param>
/// <returns>Thumbnail as Sprite or null if the item has no thumbnail.</returns>
private async Task <Sprite> DownloadDriveItemThumbnail(IDriveRequestBuilder drive, string itemId)
{
var thumbnails = await drive.Items[itemId].Thumbnails.Request().GetAsync();
if (!thumbnails.Any())
{
return(null);
}
var thumbnail = thumbnails.First();
var content = await drive.Items[itemId].Thumbnails[thumbnail.Id]["medium"].Content.Request().GetAsync();
using (var reader = new MemoryStream())
{
await content.CopyToAsync(reader);
var data = reader.ToArray();
var texture = new Texture2D(0, 0);
texture.LoadImage(data);
return(Sprite.Create(
texture,
new Rect(0, 0, texture.width, texture.height),
new Vector2(0.5f, 0.5f)));
}
}
/// <summary>
/// Uploads a new file into the folder id specificied
/// </summary>
/// <param name="folderId"></param>
/// <returns></returns>
public async Task UploadFileAsync(string folderId)
{
// Check if session is set
if (AuthenticationService == null)
{
throw new InvalidOperationException($"No {nameof(AuthenticationService)} has been specified");
}
// Open the picker for file selection
var picker = new FileOpenPicker
{
SuggestedStartLocation = PickerLocationId.Downloads,
};
// User can select any file
picker.FileTypeFilter.Add("*");
StorageFile storageFile = await picker.PickSingleFileAsync();
// storageFile is null if no file has been selected
if (storageFile != null)
{
// Create the graph request builder for the drive
IDriveRequestBuilder driveRequest = AuthenticationService.GraphClient.Me.Drive;
// If folder id is null, the request refers to the root folder
IDriveItemRequestBuilder driveItemsRequest;
if (folderId == null)
{
driveItemsRequest = driveRequest.Root;
}
else
{
driveItemsRequest = driveRequest.Items[folderId];
}
try
{
// Create an upload session for a file with the same name of the user selected file
UploadSession session = await driveItemsRequest
.ItemWithPath(storageFile.Name)
.CreateUploadSession()
.Request()
.PostAsync();
// Add a new upload item at the beginning
var item = new OneDriveFileProgress(storageFile.Name);
_progressItems.Insert(0, item);
// Start the upload process
await item.UploadFileAsync(AuthenticationService, storageFile, session);
}
catch (Exception ex)
{
Error?.Invoke(this, ex);
}
}
}
public async Task <Drive> GetUserDrive(User user, CancellationToken token)
{
IDriveRequestBuilder rb = client.Users[user.Id].Drive;
try
{
return(await rb.Request().GetAsync(token));
}
catch (Exception ex)
{
HandleException(ex, null, messageOnlyExceptions, $"Get drive for user: {user.DisplayName}");
}
return(default(Drive));
}
public async Task <Drive> GetGroupDrive(Group group, CancellationToken token)
{
IDriveRequestBuilder rb = client.Groups[group.Id].Drive;
try
{
return(await rb.Request().GetAsync(token));
}
catch (Exception ex)
{
HandleException(ex, null, messageOnlyExceptions, $"Get drive for group: {group.DisplayName}");
}
return(default(Drive));
}
/// <summary>
/// 取得空間資訊，並初始化 Drive 物件
/// </summary>
private async Task <(CloudStorageResult result, long usedSpace, long totalSpace)> GetRootInfoAsync()
{
CloudStorageResult result = new CloudStorageResult();
long usedSpace = 0, totalSpace = 0;
try
{
myDriveBuilder = graphServiceClient.Me.Drive;
Drive myDrive = await myDriveBuilder.Request().GetAsync();
usedSpace = myDrive.Quota.Used ?? 0;
totalSpace = myDrive.Quota.Total ?? 0;
result.Status = Status.Success;
}
catch (Exception ex)
{
result.Message = ex.Message;
}
return(result, usedSpace, totalSpace);
}
private async Task LoadFolderAsync(string id = null)
{
// Cancel any previous operation
_cancellationTokenSource?.Cancel();
_cancellationTokenSource = new CancellationTokenSource();
// Check if session is set
if (AuthenticationService == null)
{
throw new InvalidOperationException($"No {nameof(AuthenticationService)} has been specified");
}
// Keep a local copy of the token because the source can change while executing this function
var token = _cancellationTokenSource.Token;
// Add an option to the REST API in order to get thumbnails for each file
// https://docs.microsoft.com/en-us/onedrive/developer/rest-api/api/driveitem_list_thumbnails
var options = new[]
{
new QueryOption("$expand", "thumbnails"),
};
// Create the graph request builder for the drive
IDriveRequestBuilder driveRequest = AuthenticationService.GraphClient.Me.Drive;
// If folder id is null, the request refers to the root folder
IDriveItemRequestBuilder driveItemsRequest;
if (id == null)
{
driveItemsRequest = driveRequest.Root;
}
else
{
driveItemsRequest = driveRequest.Items[id];
}
// Raise the loading event
FolderLoading?.Invoke(this, EventArgs.Empty);
try
{
try
{
// Make a API request loading 50 items per time
var page = await driveItemsRequest.Children.Request(options).Top(50).GetAsync(token);
token.ThrowIfCancellationRequested();
// Load each page
await LoadGridItemsAsync(page, token);
token.ThrowIfCancellationRequested();
}
finally
{
// Raise the loaded event
FolderLoaded?.Invoke(this, EventArgs.Empty);
}
}
catch (OperationCanceledException)
{ }
catch (Exception ex)
{
// Raise the error event
LoadingError?.Invoke(this, ex);
}
}
/// <summary>
/// Search the drive by the given <see href="https://docs.microsoft.com/en-us/graph/query-parameters">OData Query</see> string.
/// </summary>
/// <param name="drive">Target drive to search at.</param>
/// <param name="query">Search text query</param>
/// <returns>Found DriveItems</returns>
private async Task <List <DriveItem> > SearchDrive(IDriveRequestBuilder drive, string query)
{
var search = await drive.Search(query).Request().GetAsync();
return(search.ToList());
}