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public class AddToCartHandler : ICancellableAsyncRequestHandler<AddToCart, Unit>
{
private readonly MusicStoreContext _dbContext;
public AddToCartHandler(MusicStoreContext dbContext)
{
_dbContext = dbContext;
}
public async Task<Unit> Handle(AddToCart message, CancellationToken cancellationToken)
{
// Retrieve the album from the database
var addedAlbum = await _dbContext.Albums
.SingleAsync(album => album.AlbumId == message.AlbumId, cancellationToken);
// Add it to the shopping cart
var cart = Models.ShoppingCart.GetCart(_dbContext, message.CartId);
await cart.AddToCart(addedAlbum);
await _dbContext.SaveChangesAsync(cancellationToken);
return Unit.Value;
}
}
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