private IEnumerable <IAdapterItem> GetItemsFromDirectory(DirectoryInfo directory, IAdapterItem parent)
{
return
(directory.GetFileSystemInfos()
.Where(d => SuppressedDirectories.Contains(d.Name, StringComparer.OrdinalIgnoreCase) == false)
.Select(info => FileSystemFolder.Create(info, parent, this)));
}
public override bool IsEntryUpdated(SyncEntry childEntry, IAdapterItem adapterItem, out EntryUpdateResult result)
{
const long TicksPerMillisecond = 10000;
// 2017/11/24: There appears to be a discrepency when reading ModifiedDateTimeUtc and CreationTimeUtc
// from FileSystemInfo objects. The Ticks value is being rounded to the nearest 10000 ticks, causing
// some directories to appear to be modified. For now, we will set the threshold for an item being
// changed to 10ms
const long Epsilon = TicksPerMillisecond * 10;
FileSystemFolder fileSystemItem = adapterItem as FileSystemFolder;
if (fileSystemItem == null)
{
throw new ArgumentException("The adapter item is not of the correct type.", nameof(adapterItem));
}
result = new EntryUpdateResult();
if (Math.Abs(childEntry.ModifiedDateTimeUtc.Ticks - fileSystemItem.FileSystemInfo.LastWriteTimeUtc.Ticks) > Epsilon)
{
result.ChangeFlags |= SyncEntryChangedFlags.ModifiedTimestamp;
result.ModifiedTime = fileSystemItem.FileSystemInfo.LastWriteTimeUtc;
}
if (Math.Abs(childEntry.CreationDateTimeUtc.Ticks - fileSystemItem.FileSystemInfo.CreationTimeUtc.Ticks) > Epsilon)
{
result.ChangeFlags |= SyncEntryChangedFlags.CreatedTimestamp;
result.CreationTime = fileSystemItem.FileSystemInfo.CreationTimeUtc;
}
FileInfo fileInfo = fileSystemItem.FileSystemInfo as FileInfo;
SyncEntryType fileType = SyncEntryType.Directory;
if (fileInfo != null)
{
fileType = SyncEntryType.File;
if (fileInfo.Length != childEntry.GetSize(this.Relationship, SyncEntryPropertyLocation.Source))
{
result.ChangeFlags |= SyncEntryChangedFlags.FileSize;
}
}
if (!string.Equals(fileSystemItem.Name, childEntry.Name, StringComparison.Ordinal))
{
result.ChangeFlags |= SyncEntryChangedFlags.Renamed;
}
// It is possible that a directory was created over a file that previously existed (with the same name). To
// handle this, we need to check if the type changed.
if (childEntry.Type != fileType)
{
// TODO: Handle this
throw new NotImplementedException();
}
return(result.ChangeFlags != SyncEntryChangedFlags.None);
}
public override SyncEntry CreateSyncEntryForAdapterItem(IAdapterItem item, SyncEntry parentEntry)
{
FileSystemFolder fileSystemItem = item as FileSystemFolder;
if (fileSystemItem == null)
{
throw new InvalidOperationException("Item type is incorrect.");
}
return(this.CreateEntry(fileSystemItem.FileSystemInfo, parentEntry));
}
public override async Task <IAdapterItem> GetRootFolder()
{
return(await Task.Factory.StartNew(() =>
{
if (this.Config.RootDirectory == null)
{
throw new InvalidOperationException("The root directory has not been set.");
}
DirectoryInfo rootDirectoryInfo = new DirectoryInfo(this.Config.RootDirectory);
return FileSystemFolder.Create(rootDirectoryInfo, this, false);
}).ConfigureAwait(false));
}
public override byte[] GetItemHash(HashType hashType, IAdapterItem adapterItem)
{
if (hashType == HashType.SHA1)
{
if (adapterItem.Sha1Hash != null)
{
return(adapterItem.Sha1Hash);
}
FileSystemFolder item = (FileSystemFolder)adapterItem;
string newPath = string.Join("\\", item.FullName.Split('\\').Skip(1));
string fullPath = Path.Combine(this.Config.RootDirectory, newPath);
using (SHA1Cng sha1 = new SHA1Cng())
using (var fileStream = File.OpenRead(fullPath))
{
return(sha1.ComputeHash(fileStream));
}
}
if (hashType == HashType.MD5)
{
if (adapterItem.Md5Hash != null)
{
return(adapterItem.Md5Hash);
}
FileSystemFolder item = (FileSystemFolder)adapterItem;
string newPath = string.Join("\\", item.FullName.Split('\\').Skip(1));
string fullPath = Path.Combine(this.Config.RootDirectory, newPath);
using (MD5Cng md5 = new MD5Cng())
using (var fileStream = File.OpenRead(fullPath))
{
return(md5.ComputeHash(fileStream));
}
}
throw new NotImplementedException("Unknown hash type");
}
/// <summary>
/// Get the <see cref="FileSystemFolder"/> items that are children to the provided
/// <see cref="FileSystemFolder"/>.
/// </summary>
/// <param name="folder">The parent folder</param>
/// <returns>The list of child items under the parent folder.</returns>
/// <remarks>
/// An errors encountered when querying for the list of child should be thrown for the
/// caller to handle. However, any errors related to querying the children themselves
/// should be caught and returned as error information for that child (the original
/// call should not fail in this case).
/// </remarks>
public override IEnumerable <IAdapterItem> GetAdapterItems(IAdapterItem folder)
{
// If folder is null, return the list of top-level folders on the computer (aka drives).
if (folder == null)
{
DriveInfo[] allDrives = DriveInfo.GetDrives();
List <IAdapterItem> folders = new List <IAdapterItem>();
foreach (DriveInfo driveInfo in allDrives)
{
try
{
folders.Add(FileSystemFolder.Create(driveInfo.RootDirectory, this, true));
}
catch (Exception exception)
{
Logger.Info(
"Failed to enumerate drive {0} ({1}). The error was: {2}", driveInfo.Name,
driveInfo.DriveType, exception.Message.Trim());
}
}
return(folders);
}
FileSystemFolder fileSystemFolder = folder as FileSystemFolder;
if (fileSystemFolder == null)
{
throw new InvalidOperationException("folder item is not a FileSystemFolder");
}
if (fileSystemFolder.ItemType != SyncAdapterItemType.Directory)
{
throw new InvalidOperationException("Invalid FileSystemFolder type");
}
return(this.GetItemsFromDirectory((DirectoryInfo)fileSystemFolder.FileSystemInfo, folder));
}