/// <summary>
/// convert the sortfield for serialisation
/// </summary>
/// <returns></returns>
public static string WriteSortField(PodcastFileSortField sortField)
{
switch (sortField)
{
case PodcastFileSortField.CreationTime:
return("creationtime");
default:
return("name");
}
}
/// <summary>
/// sort the supplied list of abstract files
/// </summary>
/// <param name="files">list of abstract files</param>
/// <param name="sortField">field to sort on "creationtime" to use the file created time anything else to use the file name</param>
/// <param name="ascendingSort">true to sort ascending false to sort descending</param>
public IList <IFileInfo> Sort(IEnumerable <IFileInfo> files, PodcastFileSortField sortField, bool ascendingSort)
{
List <IFileInfo> sortedFiles = new List <IFileInfo>(files);
switch (sortField)
{
case PodcastFileSortField.CreationTime:
sortedFiles.Sort((f1, f2) => f1.CreationTime.CompareTo(f2.CreationTime));
break;
default:
sortedFiles.Sort((f1, f2) => string.Compare(f1.Name, f2.Name, StringComparison.OrdinalIgnoreCase));
break;
}
if (!ascendingSort)
{
sortedFiles.Reverse();
}
return(sortedFiles);
}
/// <summary>
/// the global default for podcasts
/// </summary>
public void SetDefaultSortField(PodcastFileSortField sortField)
{
DefaultSortField = sortField;
}
/// <summary>
/// gets a number of files that match a given pattern
/// </summary>
/// <param name="folderPath">folder to look in</param>
/// <param name="pattern">pattern to look for eg. *.mp3</param>
/// <param name="maximumNumberOfFiles">maximum number of files to find</param>
/// <param name="sortField">field to sort on</param>
/// <param name="ascendingSort">true to sort ascending false to sort descending</param>
/// <returns></returns>
public IList <IFileInfo> GetFiles(string folderPath, string pattern, int maximumNumberOfFiles, PodcastFileSortField sortField, bool ascendingSort)
{
var directoryInfo = DirectoryInfoProvider.GetDirectoryInfo(folderPath);
var sortedFiles = GetSortedFiles(directoryInfo, pattern, sortField, ascendingSort);
if (maximumNumberOfFiles >= 0)
{
sortedFiles = sortedFiles.Take(maximumNumberOfFiles);
}
return(sortedFiles.ToList());
}
private IEnumerable <IFileInfo> GetSortedFiles(IDirectoryInfo src, string pattern, PodcastFileSortField sortField, bool ascendingSort)
{
try
{
var fileList = new Collection <IFileInfo>(src.GetFiles(pattern));
return(FileSorter.Sort(fileList, sortField, ascendingSort));
}
catch (DirectoryNotFoundException)
{
// if the folder is not there then there is nothing to do
return(new Collection <IFileInfo>());
}
}