private RepoTreeItem FilterByTagPrefix(ILoadedRepository repo, string prefix, Func <string, string> convertor)
{
// var nodes = new ObservableCollection<PackageCategoryTreeItem>();
var map = new Dictionary <string, List <PackageMenuItem> >();
foreach (var package in repo.Packages.Packages)
{
if (package.Value == null)
{
continue;
}
IDescriptor descriptor = package.Value !;
var pkgKey = PackageKey.Create(repo.Index.Url, descriptor.Id);
var release = repo.Release(pkgKey);
var payload = release?.WindowsExecutable();
if (release == null || payload == null)
{
continue;
}
var tags = Iter.ToArray(descriptor.Tags.Where(x => x.StartsWith(prefix)));
if (tags.IsNullOrEmpty())
{
tags = new[] { prefix };
}
foreach (var tag in tags)
{
if (!map.ContainsKey(tag))
{
map[tag] = new List <PackageMenuItem>();
}
map[tag].Add(new PackageMenuItem(_store,
pkgKey, payload, descriptor.NativeName() ?? "<>", release.Version));
}
}
var categoriesSet = new SortedSet <PackageCategoryTreeItem>(map.OrderBy(x => x.Key).Map(x => {
x.Value.Sort();
var items = new ObservableCollection <PackageMenuItem>(x.Value);
return(new PackageCategoryTreeItem(_store, convertor(x.Key), items));
}));
var categories = new ObservableCollection <PackageCategoryTreeItem>(categoriesSet);
return(new RepoTreeItem(repo.Index.NativeName(), categories));
}