private static bool MatchesExtension(ExtensionType type, string path)
{
string extension = Path.GetExtension(path)?.ToLower();
bool isNull = string.IsNullOrWhiteSpace(extension);
if (type.HasFlag(ExtensionType.Empty))
{
return(isNull);
}
else if (type.HasFlag(ExtensionType.Any))
{
return(!isNull);
}
else
{
return(GetAllowedExtensions(type)?.Contains(extension) ?? false);
}
}
private static IEnumerable <string> GetAllowedExtensions(ExtensionType type)
{
var extensions = new List <string>();
if (type.HasFlag(ExtensionType.Any | ExtensionType.Empty))
{
return(null);
}
foreach (ExtensionType activeType in type.GetFlags())
{
extensions.Add('.' + activeType.ToString().ToLower());
}
return(extensions);
}