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);
}
private static FileSystemInfo GetFileSystemInfo(string fullPath, SyncEntryType type)
{
if (type == SyncEntryType.File)
{
return(new FileInfo(fullPath));
}
return(new DirectoryInfo(fullPath));
}
public override bool IsEntryUpdated(SyncEntry childEntry, IAdapterItem adapterItem, out EntryUpdateResult result)
{
const long TicksPerMillisecond = 10000;
const long Epsilon = TicksPerMillisecond * 2;
OneDriveAdapterItem item = adapterItem as OneDriveAdapterItem;
if (item == null)
{
throw new ArgumentException("The adapter item is not of the correct type.", nameof(adapterItem));
}
result = new EntryUpdateResult();
if (item.Item.LastModifiedDateTime != null &&
Math.Abs(childEntry.ModifiedDateTimeUtc.Ticks - item.Item.LastModifiedDateTime.Value.Ticks) > Epsilon)
{
result.ChangeFlags |= SyncEntryChangedFlags.ModifiedTimestamp;
result.ModifiedTime = item.Item.LastModifiedDateTime.Value;
}
if (Math.Abs(childEntry.CreationDateTimeUtc.Ticks - item.Item.CreatedDateTime.Ticks) > Epsilon)
{
result.ChangeFlags |= SyncEntryChangedFlags.CreatedTimestamp;
result.CreationTime = item.Item.CreatedDateTime;
}
SyncEntryType fileType = SyncEntryType.Directory;
if (item.ItemType == SyncAdapterItemType.File)
{
fileType = SyncEntryType.File;
if (item.Item.Size != childEntry.GetSize(this.Relationship, SyncEntryPropertyLocation.Source))
{
// Before reporting the size of the item as changed, check the SHA1 hash. If the hash is unchanged, then the
// file is the same as it was before. This is due to a bug in OneDrive where the reported size includes
// thumbnails for the file. See https://github.com/OneDrive/onedrive-api-docs/issues/123
if (item.Item.File.Hashes != null)
{
byte[] sha1Hash = HexToBytes(item.Item.File.Hashes.Sha1Hash);
if (!sha1Hash.SequenceEqual(childEntry.GetSha1Hash(this.Relationship, SyncEntryPropertyLocation.Source)))
{
result.ChangeFlags |= SyncEntryChangedFlags.FileSize;
result.ChangeFlags |= SyncEntryChangedFlags.Sha1Hash;
}
}
}
}
if (!string.Equals(item.Item.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);
}