public async Task <IEnumerable <OnedriveItem> > GetOnedriveItemChildren(OnedriveItem item)
{
if (string.IsNullOrEmpty(item.Id))
{
throw new ArgumentException($"{nameof(item)} has no Id set.");
}
if (!item.IsDirectory)
{
_logger.Debug($"{item} is a directory.");
return(new List <OnedriveItem>());
}
_logger.Debug("Populating {0}", item.Name);
var children = await _graphServiceClient.Me.Drive.Items[item.Id].Children.Request().GetAsync();
var onedriveChildren = new List <OnedriveItem>();
foreach (var child in children)
{
var pathFromRoot = Path.Combine(item.PathFromRoot, child.Name);
var onedriveChild = new OnedriveItem(
child.Id,
(child.Folder != null),
child.Name,
pathFromRoot,
child.LastModifiedDateTime
);
onedriveChildren.Add(onedriveChild);
_logger.Debug($"Populated child node: {onedriveChild.ToString()}");
}
return(onedriveChildren);
}
public async Task DownloadItemRecursive(OnedriveItem item, string rootPath)
{
if (!item.IsDirectory)
{
return;
}
_logger.Debug($"Downloading directory {item.ToString()}");
var children = await _apiClient.GetOnedriveItemChildren(item);
foreach (var child in children)
{
await DownloadItem(child, rootPath);
}
var tasks = new List <Task>();
foreach (var child in children)
{
tasks.Add(
Task.Run(() => DownloadItemRecursive(child, rootPath))
);
}
Task.WaitAll(tasks.ToArray());
}
public async Task <Stream> GetFileStream(OnedriveItem item)
{
if (string.IsNullOrEmpty(item.Id))
{
throw new ArgumentException($"{nameof(item)} has no Id set.");
}
if (item.IsDirectory)
{
_logger.Debug($"{item} is a directory.");
}
return(await _graphServiceClient.Me.Drive.Items[item.Id].Content.Request().GetAsync());
}
public async Task <OnedriveItem> GetOnedriveRoot()
{
var root = await _graphServiceClient.Me.Drive.Root.Request().GetAsync();
var onedriveRoot = new OnedriveItem(
root.Id,
(root.Folder != null),
root.Name,
"",
root.LastModifiedDateTime
);
_logger.Debug($"Onedrive root: {onedriveRoot.ToString()}");
return(onedriveRoot);
}
public async Task DownloadItem(OnedriveItem item, string rootPath)
{
if (item.IsDirectory)
{
return;
}
var filePath = Path.Combine(rootPath, item.PathFromRoot);
if (File.Exists(filePath))
{
var localModifiedTime = File.GetLastWriteTimeUtc(filePath);
var remoteModifiedTime = item.LastModifiedDateTime;
_logger.Debug($"{item.ToString()}: {localModifiedTime} (local) {remoteModifiedTime} (remote)");
if (localModifiedTime > remoteModifiedTime)
{
_logger.Debug($"{item.ToString()}: Not downloading because local is newer");
return;
}
}
_logger.Debug($"Downloading item {item.ToString()} to {filePath}");
try
{
var stream = await _apiClient.GetFileStream(item);
var path = Path.GetDirectoryName(filePath);
Directory.CreateDirectory(path);
using (var fileStream = File.Create(filePath))
{
await stream.CopyToAsync(fileStream);
}
}
catch (Exception e)
{
_logger.Error(e, $"Error downloading item {item.ToString()}");
}
}
