public IEnumerable <IDirectory> GetDirectories()
{
var meta = this.TryGetMetaData();
if (meta == null)
{
yield break;
}
var dir = new DirectoryInfo(this.LocalPath);
foreach (var grp in meta.XPathSelectElements("//" + _XML_TAG_METAFILE_ROOT + "/" + _XML_TAG_METAFILE_DIRLIST + "/" + _XML_TAG_METAFILE_DIR)
.Select(de =>
{
string maskedName = null;
string realName;
var maskedNameAttrib = de.Attribute(_XML_ATTRIB_METAFILE_MASKEDNAME);
if (maskedNameAttrib != null)
{
maskedName = maskedNameAttrib.Value;
}
var realNameAttrib = de.Attribute(_XML_ATTRIB_METAFILE_REALNAME);
if (realNameAttrib == null ||
string.IsNullOrWhiteSpace(realNameAttrib.Value))
{
realName = maskedName;
}
else
{
realName = realNameAttrib.Value.Trim();
}
return(new
{
MaskedName = maskedName,
RealName = realName,
XmlElement = de,
});
}).Where(i => string.IsNullOrWhiteSpace(i.MaskedName) == false &&
string.IsNullOrWhiteSpace(i.RealName) == false)
.GroupBy(i => i.MaskedName.ToLower().Trim()))
{
var item = grp.Last();
var maskedDir = new DirectoryInfo(Path.Combine(dir.FullName, item.MaskedName));
if (maskedDir.Exists == false)
{
continue;
}
var newDir = new CloudPrincipalDirectory()
{
FileManager = this.FileManager,
IsRoot = false,
LocalPath = maskedDir.FullName,
Parent = this,
Xml = item.XmlElement,
};
newDir.SetName(item.RealName);
newDir.RefreshTimestamps();
yield return(newDir);
}
}
// Public Methods (6)
public IDirectory CreateDirectory(IEnumerable <char> name)
{
lock (this.FileManager.SyncRoot)
{
var realName = name.AsString();
if (realName == null)
{
throw new ArgumentNullException("realName");
}
realName = realName.Trim();
if (realName == string.Empty)
{
throw new ArgumentException("realName");
}
var deleteMaskDirOnFailure = false;
var maskedDir = this.GetNextMaskedDirectory();
try
{
var meta = this.TryGetMetaData();
if (meta == null)
{
// current meta data could not be read or was not found
meta = new XDocument(new XDeclaration("1.0", Encoding.UTF8.WebName, "yes"));
}
var directoryElement = meta.Root;
if (directoryElement == null)
{
// root element does not exist
directoryElement = new XElement(_XML_TAG_METAFILE_ROOT);
meta.Add(directoryElement);
}
var dirListElement = directoryElement.Elements(_XML_TAG_METAFILE_DIRLIST).SingleOrDefault();
if (dirListElement == null)
{
// directory list element does not exist
dirListElement = new XElement(_XML_TAG_METAFILE_DIRLIST);
directoryElement.Add(dirListElement);
}
// try find existing entry
var dirElement = CollectionHelper.SingleOrDefault(dirListElement.Elements(_XML_TAG_METAFILE_DIR),
e =>
{
var realNameAttrib = e.Attribute(_XML_ATTRIB_METAFILE_MASKEDNAME);
if (realNameAttrib != null)
{
return((realNameAttrib.Value ?? string.Empty).ToLower().Trim() ==
realName.ToLower().Trim());
}
return(false);
});
if (dirElement == null)
{
// no entry found => create new one
maskedDir = Directory.CreateDirectory(maskedDir.FullName);
deleteMaskDirOnFailure = true;
dirElement = new XElement(_XML_TAG_METAFILE_DIR);
dirElement.SetAttributeValue(_XML_ATTRIB_METAFILE_REALNAME, realName);
dirElement.SetAttributeValue(_XML_ATTRIB_METAFILE_MASKEDNAME, maskedDir.Name);
dirListElement.Add(dirElement);
}
else
{
var maskedNameAttrib = dirElement.Attribute(_XML_ATTRIB_METAFILE_MASKEDNAME);
if (maskedNameAttrib != null &&
string.IsNullOrWhiteSpace(maskedNameAttrib.Value) == false)
{
maskedDir = new DirectoryInfo(Path.Combine(this.LocalPath,
maskedNameAttrib.Value.Trim()));
}
}
// update meta data
this.UpdateMetaData(meta);
var result = new CloudPrincipalDirectory();
result.FileManager = this.FileManager;
result.LocalPath = maskedDir.FullName;
result.Parent = this;
result.Xml = directoryElement;
result.SetName(realName);
// try update timestamps
try
{
maskedDir.Refresh();
var actions = new Action <CloudPrincipalDirectory, DirectoryInfo>[]
{
(cloudDir, localDir) => cloudDir.CreationTime = localDir.CreationTimeUtc,
(cloudDir, localDir) => cloudDir.WriteTime = localDir.LastWriteTimeUtc,
};
actions.ForAll(ctx => ctx.Item(result, maskedDir),
throwExceptions: false);
}
catch
{
// ignore errors here
}
return(result);
}
catch
{
if (deleteMaskDirOnFailure)
{
if (maskedDir != null)
{
maskedDir.Refresh();
if (maskedDir.Exists)
{
maskedDir.Delete();
maskedDir.Refresh();
}
}
}
throw;
}
}
}
