async Task <bool> ICardService.ToggleFavouriteAsync(int id, int userId, CancellationToken cancellationToken)
{
var cards = await _cardRepository.FindCardsAsync(
new Data.Abstractions.CardSearchFilter
{
Ids = new int[]
{
id,
},
UserId = userId,
},
cancellationToken : cancellationToken
);
var card = cards.Results.FirstOrDefault();
if (card == null)
{
throw new InvalidCardException($"Card { id } does not exist.");
}
await _cardRepository.FavouriteCardAsync(id, userId, !card.IsFavourited, cancellationToken : cancellationToken);
return(!card.IsFavourited);
}