/// <summary>
/// Called when a file or folder is created in the remote storage.
/// </summary>
/// <remarks>In this method we create a new file/folder in user file system.</remarks>
private async void CreatedAsync(object sender, FileSystemEventArgs e)
{
LogMessage(e.ChangeType.ToString(), e.FullPath);
string remoteStoragePath = e.FullPath;
try
{
string userFileSystemPath = Mapping.ReverseMapPath(remoteStoragePath);
string userFileSystemParentPath = Path.GetDirectoryName(userFileSystemPath);
// Because of the on-demand population the file or folder placeholder may not exist in the user file system.
// Here we also check that the folder content was loaded into user file system (the folder is not offline).
if (Directory.Exists(userFileSystemParentPath) &&
!new DirectoryInfo(userFileSystemParentPath).Attributes.HasFlag(System.IO.FileAttributes.Offline))
{
if (!FsPath.AvoidSync(remoteStoragePath))
{
FileSystemInfo remoteStorageItem = FsPath.GetFileSystemItem(remoteStoragePath);
await UserFileSystemItem.CreateAsync(userFileSystemParentPath, remoteStorageItem);
LogMessage("Created succesefully:", userFileSystemPath);
}
}
}
catch (Exception ex)
{
LogError($"{e.ChangeType} failed:", remoteStoragePath, ex);
}
}
/// <summary>
/// Recursively synchronizes all files and folders with the server.
/// Synchronizes only folders already loaded into the user file system.
/// </summary>
/// <param name="userFileSystemFolderPath">Folder path in user file system.</param>
private async Task SyncronizeFolderAsync(string userFileSystemFolderPath)
{
// In case of on-demand loading the user file system contains only a subset of the server files and folders.
// Here we sync folder only if its content already loaded into user file system (folder is not offline).
// The folder content is loaded inside IFolder.GetChildrenAsync() method.
if (new DirectoryInfo(userFileSystemFolderPath).Attributes.HasFlag(System.IO.FileAttributes.Offline))
{
LogMessage("Folder offline, skipping:", userFileSystemFolderPath);
return;
}
IEnumerable <string> userFileSystemChildren = Directory.EnumerateFileSystemEntries(userFileSystemFolderPath, "*");
LogMessage("Synchronizing:", userFileSystemFolderPath);
string remoteStorageFolderPath = Mapping.MapPath(userFileSystemFolderPath);
IEnumerable <FileSystemInfo> remoteStorageChildrenItems = new DirectoryInfo(remoteStorageFolderPath).EnumerateFileSystemInfos("*");
// Delete files/folders in user file system.
foreach (string userFileSystemPath in userFileSystemChildren)
{
try
{
string remoteStoragePath = Mapping.MapPath(userFileSystemPath);
FileSystemInfo remoteStorageItem = remoteStorageChildrenItems.FirstOrDefault(x => x.FullName.Equals(remoteStoragePath, StringComparison.InvariantCultureIgnoreCase));
if (remoteStorageItem == null)
{
LogMessage("Deleting item:", userFileSystemPath);
await new UserFileSystemItem(userFileSystemPath).DeleteAsync();
LogMessage("Deleted succesefully:", userFileSystemPath);
}
}
catch (Exception ex)
{
LogError("Delete failed:", userFileSystemPath, ex);
}
}
// Create new files/folders in user file system.
foreach (FileSystemInfo remoteStorageItem in remoteStorageChildrenItems)
{
try
{
string userFileSystemPath = Mapping.ReverseMapPath(remoteStorageItem.FullName);
if (!FsPath.Exists(userFileSystemPath))
{
LogMessage("Creating new item:", userFileSystemPath);
await UserFileSystemItem.CreateAsync(userFileSystemFolderPath, remoteStorageItem);
LogMessage("Created succesefully:", userFileSystemPath);
}
}
catch (Exception ex)
{
LogError("Creation failed:", remoteStorageItem.FullName, ex);
}
}
// Update files/folders in user file system and sync subfolders.
userFileSystemChildren = Directory.EnumerateFileSystemEntries(userFileSystemFolderPath, "*");
foreach (string userFileSystemPath in userFileSystemChildren)
{
try
{
string remoteStoragePath = Mapping.MapPath(userFileSystemPath);
FileSystemInfo remoteStorageItem = remoteStorageChildrenItems.FirstOrDefault(x => x.FullName.Equals(remoteStoragePath, StringComparison.InvariantCultureIgnoreCase));
// The item was deleted or moved/renamed on the server, but it may still exists in the user file system.
// This is just to avoid extra exceptions in the log.
if (remoteStorageItem == null)
{
continue;
}
// Update existing files/folders info.
if (!await new UserFileSystemItem(userFileSystemPath).EqualsAsync(remoteStorageItem))
{
LogMessage("Item modified:", remoteStoragePath);
await new UserFileSystemItem(userFileSystemPath).UpdateAsync(remoteStorageItem);
LogMessage("Updated succesefully:", userFileSystemPath);
}
// Hydrate / dehydrate the file.
else
{
bool?hydrated = await new UserFileSystemItem(userFileSystemPath).UpdateHydrationAsync();
if (hydrated != null)
{
string hydrationDescrition = (bool)hydrated ? "Hydrated" : "Dehydrated";
LogMessage($"{hydrationDescrition} succesefully:", userFileSystemPath);
}
}
}
catch (Exception ex)
{
LogError("Update failed:", userFileSystemPath, ex);
}
// Synchronize subfolders.
try
{
if (FsPath.IsFolder(userFileSystemPath))
{
await SyncronizeFolderAsync(userFileSystemPath);
}
}
catch (Exception ex)
{
LogError("Folder sync failed:", userFileSystemPath, ex);
}
}
}