/// <summary>
/// Initializes a new instance of the <see cref="CartOperationInfo"/>.
/// </summary>
/// <param name="type"></param>
/// <param name="status"></param>
/// <param name="exception">
/// The <see cref="Exception"/> related to the failure.
/// Important: if <paramref name="status"/> is <see cref="CartOperationStatus.Error"/> then this
/// field must not be <code>null</code>, otherwise <see cref="ArgumentNullException"/> will be thrown.
/// </param>
public CartOperationInfo(CartOperationType type, CartOperationStatus status, Exception exception = null)
{
this.Type = type;
this.Status = status;
this.Exception = exception;
if ((exception == null && status == CartOperationStatus.Error) ||
(exception != null && status == CartOperationStatus.Successful))
{
throw new ArgumentNullException(nameof(exception),
"Necessary and sufficient condition for exception to be present is that the message is set as error");
}
}
public Task AddOrRemoveAsync(
CartOperationType cartOperationType,
string userId,
int productId)
{
return(Task.Run(() =>
{
if (!_memoryCache.TryGetValue(userId, out CartDto cartDto))
{
cartDto = new CartDto
{
UserId = userId,
ProductIds = new List <int>(),
};
}
switch (cartOperationType)
{
case CartOperationType.Add:
{
cartDto.ProductIds.Add(productId);
}
break;
case CartOperationType.Remove:
{
cartDto.ProductIds.Remove(productId);
}
break;
case CartOperationType.Unknown:
break;
default:
break;
}
_memoryCache.Set(
userId,
cartDto,
new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(TimeSpan.FromMinutes(60)));
}));
}