/// <summary>
/// Find a share that allows access to this local path.
/// Note that it's possible for more than one share to match a specific path.
/// In such case the most specific share will be chosen.
/// For example if share A has local path /home/user and share B has local
/// path /home/user/downloads, for localPath='/home/user/downloads/file.mp4'
/// the method returns B.
/// </summary>
/// <returns>The parent share or null.</returns>
/// <param name="localPath">Local absolute path of a file or directory.
/// It doesn't necessarily need to exist, but needs to be a valid path.
/// It should be a plain path, not an URI or UNC path and shouldn't be
/// escaped in any way.
/// </param>
public Share FindParentShare(TokenizedLocalPath localPath)
{
Share result = null;
ShareTreeEntry treeElem = treeRoot;
foreach (string elem in localPath)
{
string elemCased = caseSensitiveFileSystem ? elem : elem.ToLowerInvariant();
ShareTreeEntry childElem = null;
treeElem.children.TryGetValue(elemCased, out childElem);
if (childElem != null)
{
if (childElem.share != null)
{
// Found a matching share! But continue searching in case
// there's another, more specific share.
result = childElem.share;
}
// Continue diving into the tree.
treeElem = childElem;
}
else
{
// No more children.
break;
}
}
return(result);
}
/// <summary>
/// Add the share to this list. If for any reason there's already another
/// share for this local path, the new share replaces it.
/// </summary>
/// <param name="share">The share to add.</param>
public void AddOrReplace(Share share)
{
if (!sharesByName.ContainsKey(share.Name))
{
sharesByName.Remove(share.Name);
}
sharesByName.Add(share.Name, share);
TokenizedLocalPath path = share.LocalPath;
ShareTreeEntry treeElem = treeRoot;
foreach (string elem in share.LocalPath)
{
string elemCased = caseSensitiveFileSystem ? elem : elem.ToLowerInvariant();
ShareTreeEntry childElem = null;
treeElem.children.TryGetValue(elemCased, out childElem);
if (childElem == null)
{
childElem = new ShareTreeEntry(elem);
treeElem.children.Add(elemCased, childElem);
}
treeElem = childElem;
}
treeElem.share = share;
}
