/// <summary>
/// check if the url exist in the database
/// </summary>
/// <param name="url">the url that must be checked</param>
/// <returns></returns>
private ShortURLModel URLExist(string url)
{
ShortURLModel foundUrl = _shortUrlRepository.GetByActualUrl(url);
if (foundUrl != null)
{
return(null);
}
else
{
return(foundUrl);
}
}