private static void RemoveUnwantedVideoFiles(string destDirName, IEnumerable <string> videoFilesToInclude)
{
// If videoFilesToInclude is null or empty, ALL video files in the video subdirectory will be deleted.
// This likely means that they aren't referenced in the Book's .htm file, although someday there could be
// other reasons to not include them.
var videoDir = BookStorage.GetVideoFolderPath(destDirName);
if (!Directory.Exists(videoDir))
{
return;
}
foreach (var videoFilePath in Directory.EnumerateFiles(videoDir))
{
// videoFilesToInclude strings do not include timings, but do include "video/" prefix,
// so include the prefix in our Contains() test.
var fileName = BookStorage.GetNormalizedPathForOS(Path.GetFileName(videoFilePath));
if (videoFilesToInclude == null || !videoFilesToInclude.Contains(BookStorage.GetVideoFolderName + fileName))
{
RobustFile.Delete(videoFilePath);
}
}
}