private async Task <bool> SaveGuard(UpdateCategoryProcessStartedEvent categoryChangedEvent)
{
var existingCategoryResult = await _categorySearchHandler.GetById(new GetCategoryByIdQuery(categoryChangedEvent.Id));
if (!existingCategoryResult.Success)
{
var failedEvent =
new UpdatingCategoryFailedEvent(categoryChangedEvent.Id, CategoryModificationStatus.NotFound, categoryChangedEvent.CorrelationId);
await this.SaveAndDispatchEvent(categoryChangedEvent.Id, failedEvent);
_logger.LogProgress(OperationStatus.Failed, $"Category({categoryChangedEvent.Id}) cannot be found", categoryChangedEvent.CorrelationId);
return(false);
}
var existingCategoryWithSameNameResult = await _categorySearchHandler.GetByName(new GetCategoryByNameQuery(categoryChangedEvent.Name));
if (existingCategoryWithSameNameResult.Success)
{
var failedEvent = new UpdatingCategoryFailedEvent(categoryChangedEvent.Id, CategoryModificationStatus.DuplicatedName,
categoryChangedEvent.CorrelationId);
await this.SaveAndDispatchEvent(categoryChangedEvent.Id, failedEvent);
_logger.LogProgress(OperationStatus.Failed, $"Cannot save category({categoryChangedEvent.Id}). Duplicated name", categoryChangedEvent.CorrelationId);
return(false);
}
return(true);
}
public async Task Handle(UpdateCategoryProcessStartedEvent categoryChangedEvent)
{
var canSave = await this.SaveGuard(categoryChangedEvent);
if (!canSave)
{
return;
}
var category = new CategoryDto(
categoryChangedEvent.Id,
categoryChangedEvent.Name,
categoryChangedEvent.Description,
categoryChangedEvent.SortOrder);
var saveResult = await _categoryIndexer.Index(category);
if (!saveResult.Success)
{
var failedEvent = new UpdatingCategoryFailedEvent(categoryChangedEvent.Id, CategoryModificationStatus.UnexpectedProblem, categoryChangedEvent.CorrelationId);
await this.SaveAndDispatchEvent(categoryChangedEvent.Id, failedEvent);
_logger.LogProgress(OperationStatus.Failed, "Problem occured while saving the category", categoryChangedEvent.CorrelationId);
return;
}
var successEvent = this.GetSuccessEvent(categoryChangedEvent);
_logger.LogProgress(OperationStatus.Finished, string.Empty, categoryChangedEvent.CorrelationId);
await this.SaveAndDispatchEvent(categoryChangedEvent.Id, successEvent);
}