public void EnumerateChanges(INSFileProviderChangeObserver observer, NSData syncAnchor)
{
uint anchor = GetAnchorFromNsData(syncAnchor);
try
{
FolderMetadata metadata = storageManager.GetFolderMetadata(this.enumeratedItemIdentifier);
if (!metadata.IsExists)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreateNonExistentItemError(enumeratedItemIdentifier));
return;
}
ItemMetadata[] metadatas = this.storageManager.GetFolderChildrenMetadatas(metadata);
ChangeSet diff = this.synchronizationSimulator.GetDiff(anchor, metadatas);
observer.DidDeleteItems(diff.DeletedId);
INSFileProviderItem[] updatedItems = ProviderItem.CreateFromMetadatas(diff.Updated);
observer.DidUpdateItems(updatedItems);
this.SyncAnchor = this.synchronizationSimulator.AddChangeSet(metadatas);
observer.FinishEnumeratingChanges(this.GetCurrentAnchorNsData(this.SyncAnchor), false);
}
catch (UnauthorizedException)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreatesNotAuthenticatedError());
}
catch (WebDavHttpException)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedNetworkError());
}
catch (Exception)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedError());
}
}
/// <param name="observer">To be added.</param>
/// <param name="startPage">To be added.</param>
/// <summary>To be added.</summary>
/// <remarks>To be added.</remarks>
public void EnumerateItems(INSFileProviderEnumerationObserver observer, NSData startPage)
{
try
{
var metadata = storageManager.GetFileMetadata(this.EnumeratedItemIdentifier);
if (!metadata.IsExists)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreateNonExistentItemError(EnumeratedItemIdentifier));
return;
}
INSFileProviderItem item = ProviderItem.CreateFromMetadata(metadata);
observer.DidEnumerateItems(new[] { item });
observer.FinishEnumerating((NSData)null);
}
catch (UnauthorizedException)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreateNonExistentItemError(this.EnumeratedItemIdentifier));
}
catch (WebDavHttpException)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedNetworkError());
}
catch (Exception)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedError());
}
}
/// <param name="observer">To be added.</param>
/// <param name="startPage">To be added.</param>
/// <summary>To be added.</summary>
/// <remarks>To be added.</remarks>
public void EnumerateItems(INSFileProviderEnumerationObserver observer, NSData startPage)
{
try
{
FolderMetadata metadata = storageManager.GetFolderMetadata(this.enumeratedItemIdentifier);
if (!metadata.IsExists)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreateNonExistentItemError(enumeratedItemIdentifier));
return;
}
ItemMetadata[] metadatas = this.storageManager.GetFolderChildrenMetadatas(metadata);
this.SyncAnchor = this.synchronizationSimulator.AddChangeSet(metadatas);
INSFileProviderItem[] items = ProviderItem.CreateFromMetadatas(metadatas);
observer.DidEnumerateItems(items);
observer.FinishEnumerating((NSData)null);
}
catch (UnauthorizedException)
{
observer.FinishEnumerating(NSFileProviderErrorFactory.CreatesNotAuthenticatedError());
}
catch (WebDavHttpException)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedNetworkError());
}
catch (Exception)
{
observer.FinishEnumerating(NSErrorFactory.CreateUnspecifiedError());
}
}
/// <param name="url">The shared document's URL.</param>
/// <param name="completionHandler">
/// <para>An action the system calls subsequent to the creation of a placeholder.</para>
/// <para tool="nullallowed">This parameter can be <see langword="null" />.</para>
/// </param>
/// <summary>When implemented by the developer, creates a specified placeholder for a previously defined URL.</summary>
/// <remarks>
/// <para>The developer must override this method. This method is called to provide a placeholder for documents that are returned by the Document Picker but that are not locally stored.</para>
/// <para tool="threads">This can be used from a background thread.</para>
/// </remarks>
public override void ProvidePlaceholderAtUrl(NSUrl url, Action <NSError> completionHandler)
{
try
{
string identifier = this.GetPersistentIdentifier(url);
ItemMetadata itemMetadata = this.StorageManager.GetItemMetadata(identifier);
if (!itemMetadata.IsExists)
{
completionHandler?.Invoke(NSFileProviderErrorFactory.CreateNonExistentItemError(identifier));
return;
}
NSUrl placeholderUrl = NSFileProviderManager.GetPlaceholderUrl(url);
NSError error;
NSFileManager.DefaultManager.CreateDirectory(placeholderUrl.RemoveLastPathComponent(), true, null, out error);
if (error != null)
{
completionHandler?.Invoke(error);
return;
}
INSFileProviderItem providerItem = ProviderItem.CreateFromMetadata(itemMetadata);
NSFileProviderManager.WritePlaceholder(placeholderUrl, providerItem, out error);
completionHandler?.Invoke(error);
}
catch (Exception ex)
{
NSError error = this.MapError(ex);
completionHandler?.Invoke(error);
}
}
/// <param name="fileUrl">The URL for the file.</param>
/// <param name="parentItemIdentifier">The parent directory's persistent identifier.</param>
/// <param name="completionHandler">A handler to run after the operation completes.</param>
/// <summary>When implemented by the developer, imports the resource at the specified <paramref name="fileUrl" /> into the directory that is identified by <paramref name="parentItemIdentifier" />.</summary>
/// <remarks>
/// <para>(More documentation for this node is coming)</para>
/// <para tool="threads">This can be used from a background thread.</para>
/// </remarks>
public override void ImportDocument(NSUrl fileUrl, string parentItemIdentifier, Action <INSFileProviderItem, NSError> completionHandler)
{
try
{
fileUrl.StartAccessingSecurityScopedResource();
FolderMetadata parentMetadata = StorageManager.GetFolderMetadata(parentItemIdentifier);
if (!parentMetadata.IsExists)
{
completionHandler?.Invoke(null, NSFileProviderErrorFactory.CreateNonExistentItemError(parentItemIdentifier));
return;
}
IEnumerable <string> existsNames = StorageManager.GetFolderChildrenMetadatas(parentMetadata).Select(x => x.Name);
string fileName = GetNewFileName(fileUrl.LastPathComponent, existsNames);
FileMetadata createdFile = StorageManager.CreateFileOnServer(parentMetadata, fileName);
createdFile = StorageManager.WriteFileContentOnServer(createdFile, fileUrl.Path);
completionHandler?.Invoke(ProviderItem.CreateFromMetadata(createdFile), null);
this.StorageManager.NotifyEnumerator(parentItemIdentifier);
}
catch (Exception ex)
{
NSError error = this.MapError(ex);
completionHandler?.Invoke(null, error);
}
finally
{
fileUrl.StopAccessingSecurityScopedResource();
}
}
private NSError MapError(Exception localFileUploadError)
{
switch (localFileUploadError)
{
case NSErrorException error:
return(error.Error);
case NotFoundException _:
return(NSFileProviderErrorFactory.CreateNonExistentItemError());
case UnauthorizedException _:
return(NSFileProviderErrorFactory.CreatesNotAuthenticatedError());
case WebDavHttpException _:
return(NSErrorFactory.CreateUnspecifiedNetworkError());
default:
return(NSErrorFactory.CreateUnspecifiedError());
}
}
public override INSFileProviderItem GetItem(NSString identifier, out NSError error)
{
error = null;
try
{
ItemMetadata itemMetadata = this.StorageManager.GetItemMetadata(identifier);
if (!itemMetadata.IsExists)
{
error = NSFileProviderErrorFactory.CreateNonExistentItemError(identifier);
return(null);
}
return(ProviderItem.CreateFromMetadata(itemMetadata));
}
catch (Exception ex)
{
error = this.MapError(ex);
}
return(null);
}
/// <param name="url">The shared document's URL.</param>
/// <summary>When implemented by the developer, informs a file provider extension that there has been a change in a document.</summary>
/// <remarks>
/// <para>You must override this method.Do not call super.</para>
/// <para tool="threads">This can be used from a background thread.</para>
/// </remarks>
public override void ItemChangedAtUrl(NSUrl url)
{
string identifier = this.GetPersistentIdentifier(url);
try
{
FileMetadata item = this.StorageManager.GetFileMetadata(identifier);
if (!item.ExistsLocal)
{
throw NSFileProviderErrorFactory.CreateNonExistentItemError().AsException();
}
item = StorageManager.ResetLocalVersion(item);
this.StorageManager.PushToServer(item);
}
catch (Exception e)
{
NSError localFileUploadError = MapError(e);
StorageManager.SetUploadError(url, localFileUploadError);
}
}
