public async Task <int> Handle(AddNewProductCommand request, CancellationToken cancellationToken)
{
//validation
var validator = new AddNewProductCommandValidator();
ValidationResult results = validator.Validate(request);
bool validationSucceeded = results.IsValid;
if (!validationSucceeded)
{
var failures = results.Errors.ToList();
var message = new StringBuilder();
failures.ForEach(f => { message.Append(f.ErrorMessage + Environment.NewLine); });
throw new ValidationException(message.ToString());
}
//add new product
var product = new Product
{
Id = request.Id,
Name = request.Name,
Description = request.Description,
UnitPrice = 0,
CurrentStock = 0
};
_context.Products.Add(product);
await _context.SaveChangesAsync(cancellationToken);
//notification
await _mediator.Publish(new ProductCreated(product));
return(1);
}
public async Task <Unit> Handle(DeleteProductCommand request, CancellationToken cancellationToken)
{
var product = await _context.Products.FindAsync(request.Id);
if (product == null)
{
throw new NotFoundException(nameof(Product), request.Id);
}
_context.Products.Remove(product);
await _context.SaveChangesAsync(cancellationToken);
//notification
await _mediator.Publish(new ProductDeleted(product));
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateProductCurrentStockCommand request, CancellationToken cancellationToken)
{
var product = await _context.Products.FindAsync(request.Id);
if (product == null)
{
throw new NotFoundException(nameof(Product), request.Id);
}
var oldStockt = product.CurrentStock;
product.CurrentStock = request.CurrentStock;
await _context.SaveChangesAsync(cancellationToken);
//notification
await _mediator.Publish(new ProductCurrentStockUpdated(product, oldStockt));
return(Unit.Value);
}
