public async Task <OperationResult> ValidateAsync(IShopManager manager, DescriptionGroupItem entity)
{
if (manager == null)
{
throw new ArgumentNullException(nameof(manager));
}
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
var errors = new List <OperationError>();
if (entity.Name.IsNullOrEmpty())
{
errors.Add(manager.ErrorDescriber.EmptyDescriptionGroupItemName());
}
else
{
var existing = await manager.GetDescriptionItemByNameAsync(entity.Name);
if (existing != null && existing?.Id != entity.Id && existing.DescriptionGroupId == entity.DescriptionGroupId)
{
errors.Add(manager.ErrorDescriber.DuplicateDescriptionGroupItemName());
}
}
var descGroup = await manager.GetDescriptionGroupByIdAsync(entity.DescriptionGroupId.GetValueOrDefault());
if (descGroup == null)
{
errors.Add(manager.ErrorDescriber.EntityNotFound("Группа описаний"));
}
if (errors.Count > 0)
{
return(OperationResult.Failure(errors.ToArray()));
}
return(OperationResult.Success());
}