/// <summary>
/// Returns a VersionData that contains only those children contained in a changelog
/// </summary>
/// <param name="changelog"></param>
/// <param name="prefix"></param>
/// <returns></returns>
public VersionData Trim(Changelog changelog, string prefix = "")
{
if (Filetype != FileType.Directory)
{
throw new InvalidOperationException("Trim cannot operate on a FileType.File");
}
var vdcollection = new VDKeyedCollection();
foreach (var vd in children)
{
string fpath = PrefixFilename(prefix, vd.Filename);
if (changelog.Added.ContainsKey(fpath) || changelog.Modified.ContainsKey(fpath))
{
if (vd.Filetype == FileType.Directory)
{
vdcollection.Add(vd.Trim(changelog, fpath));
}
else
{
vdcollection.Add(new VersionData(vd.Filename, vd.Data));
}
}
}
return(new VersionData(Filename, vdcollection));
}
/// <summary>
/// Selects all files that were altered in some way (added, modified, removed, or renamed)
/// </summary>
/// <param name="thisVD"></param>
/// <param name="otherVD"></param>
/// <param name="byName"></param>
/// <param name="byHash"></param>
private static void AddAlteredFiles(VDKeyedCollection thisVD, VDKeyedCollection otherVD, VDKeyedCollection
byName, Dictionary <string, LinkedList <string> > byHash)
{
foreach (var pair in thisVD)
{
string name = pair.Filename;
string hash = pair.Hash;
bool contains = false;
if (otherVD.Contains(name)) //if the file has not been altered
{
contains = true;
if (hash == otherVD[name].Hash)
{
continue;
}
}
if (!byHash.ContainsKey(hash))
{
byHash[hash] = new LinkedList <string>();
}
if (contains) //prioritize renaming files with no counterpart
{
byHash[hash].AddLast(name);
}
else
{
byHash[hash].AddFirst(name);
}
byName.Add(pair);
}
}
/// <summary>
/// Converts a DataNode and all descendants to a VersionData
/// </summary>
/// <param name="node"></param>
/// <returns></returns>
private VersionData GetDirectoryData(DataNode node)
{
VDKeyedCollection children = new VDKeyedCollection();
foreach (var childNode in node.children)
{
if (childNode.data == null)
{
continue;
}
if (childNode.data.Filetype == VersionData.FileType.Directory)
{
children.Add(GetDirectoryData(childNode));
}
else
{
var vd = childNode.data;
children.Add(new VersionData(childNode.filename, vd.Data, vd.Hash));
}
}
return(new VersionData(node.filename, children));
}