public override IMediaFolder Transform(IMediaFolder oldRoot)
{
var root = new VirtualClonedFolder(oldRoot);
var titles = new SimpleKeyedVirtualFolder(root, "titles");
SortFolder(root, titles);
foreach (var i in root.ChildFolders.ToList())
{
root.ReleaseFolder(i);
}
foreach (var i in titles.ChildFolders.ToList())
{
if (i.ChildCount > 100)
{
DebugFormat("Partioning folder {0}", i.Title);
using (var prefixer = new Prefixer())
{
PartitionChildren(i as VirtualFolder, prefixer);
}
}
root.AdoptFolder(i);
}
return(root);
}
private void PartitionChildren(VirtualFolder folder, Prefixer prefixer, int startfrom = 1)
{
for (var wordcount = startfrom;;)
{
var curwc = wordcount;
var groups = from i in folder.ChildItems.ToList()
let prefix = prefixer.GetWordPrefix(GetTitle(i), curwc)
where !string.IsNullOrWhiteSpace(prefix)
group i by prefix.ToLowerInvariant()
into g
let gcount = g.LongCount()
where gcount > 3
orderby g.LongCount() descending
select g;
var longest = groups.FirstOrDefault();
if (longest == null)
{
if (wordcount++ > 5)
{
return;
}
continue;
}
var newfolder = new VirtualFolder(folder, longest.Key);
foreach (var item in longest)
{
folder.RemoveResource(item);
newfolder.AddResource(item);
}
if (newfolder.ChildCount > 100)
{
PartitionChildren(newfolder, prefixer, wordcount + 1);
}
if (newfolder.ChildFolders.LongCount() == 1)
{
foreach (var f in newfolder.ChildFolders.ToList())
{
folder.AdoptFolder(f);
}
}
else
{
folder.AdoptFolder(newfolder);
}
}
}
public override IMediaFolder Transform(IMediaFolder oldRoot)
{
var root = new VirtualClonedFolder(oldRoot);
var titles = new SimpleKeyedVirtualFolder(root, "titles");
SortFolder(root, titles);
foreach (var i in root.ChildFolders.ToList()) {
root.ReleaseFolder(i);
}
foreach (var i in titles.ChildFolders.ToList()) {
if (i.ChildCount > 100) {
DebugFormat("Partioning folder {0}", i.Title);
using (var prefixer = new Prefixer()) {
PartitionChildren(i as VirtualFolder, prefixer);
}
}
root.AdoptFolder(i);
}
return root;
}
private void PartitionChildren(VirtualFolder folder, Prefixer prefixer, int startfrom = 1)
{
for (var wordcount = startfrom;;) {
var curwc = wordcount;
var groups = from i in folder.ChildItems.ToList()
let prefix = prefixer.GetWordPrefix(GetTitle(i), curwc)
where !string.IsNullOrWhiteSpace(prefix)
group i by prefix.ToLowerInvariant()
into g
let gcount = g.LongCount()
where gcount > 3
orderby g.LongCount() descending
select g;
var longest = groups.FirstOrDefault();
if (longest == null) {
if (wordcount++ > 5) {
return;
}
continue;
}
var newfolder = new VirtualFolder(folder, longest.Key);
foreach (var item in longest) {
folder.RemoveResource(item);
newfolder.AddResource(item);
}
if (newfolder.ChildCount > 100) {
PartitionChildren(newfolder, prefixer, wordcount + 1);
}
if (newfolder.ChildFolders.LongCount() == 1) {
foreach (var f in newfolder.ChildFolders.ToList()) {
folder.AdoptFolder(f);
}
}
else {
folder.AdoptFolder(newfolder);
}
}
}
