public async Task <string> GetOrCreateShortCodeAsync(string longUrl)
{
var shortCode = await _repository.GetShortCodeAsync(longUrl);
if (shortCode == null)
{
do
{
shortCode = ShortIdGenerator.CreateId();
}while ((await _repository.GetLongUrlAsync(shortCode)) != null);
await _repository.SetShortCodeAsync(longUrl, shortCode);
}
return(shortCode);
}
