private static void Validate(IFileProviderFactory fileProviderFactory, GetSortedFoldersDefinition parameters)
{
if (parameters.Limit < 0)
{
throw new ValidationPublicException("Negative value can't be used for a limit");
}
if (!fileProviderFactory.Exists(parameters.Path))
{
throw new ObjectNotFoundPublicException("Path not found");
}
}
public Task <IEnumerable <FolderInfo> > Handle(GetSortedFoldersDefinition parameters,
CancellationToken cancellationToken = default(CancellationToken))
{
Validate(_fileProviderFactory, parameters);
if (parameters.Limit == 0)
{
return(Task.FromResult(Enumerable.Empty <FolderInfo>()));
}
if (_memoryCache.TryGetValue(parameters.Path, out var cacheResult))
{
return(Task.FromResult((IEnumerable <FolderInfo>)cacheResult));
}
var result = GetFolderInfosInternal(parameters, _fileProviderFactory, cancellationToken);
_memoryCache.Set(parameters.Path, result, TimeSpan.FromMinutes(5));
return(Task.FromResult(result.AsEnumerable()));
}
private static FolderInfo[] GetFolderInfosInternal(GetSortedFoldersDefinition parameters, IFileProviderFactory fileProviderFactory, CancellationToken cancellationToken)
{
var fileProvider = fileProviderFactory.GetFileProvider(parameters.Path);
var rootContents = fileProvider.GetDirectoryContents(string.Empty);
var topDirs = rootContents.Where(fi => fi.IsDirectory);
var resultList = new List <FolderInfo>();
foreach (var topDir in topDirs)
{
var size = GetFolderSize(fileProvider, topDir, cancellationToken);
var folderInfo = new FolderInfo {
Name = topDir.Name, Size = size
};
resultList.Add(folderInfo);
}
var orderedFolders = resultList.OrderByDescending(f => f.Size);
var result = parameters.Limit.HasValue ? orderedFolders.Take(parameters.Limit.Value) : orderedFolders;
return(result.ToArray());
}