public async Task <Unit> Handle(UpdateCustomerCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Customers
.SingleAsync(c => c.CustomerId == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Customers), request.Id);
}
entity.Address = request.Address;
entity.City = request.City;
entity.CompanyName = request.CompanyName;
entity.ContactName = request.ContactName;
entity.ContactTitle = request.ContactTitle;
entity.Country = request.Country;
entity.Fax = request.Fax;
entity.Phone = request.Phone;
entity.PostalCode = request.PostalCode;
_context.Customers.Update(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(CreateCustomerCommand request, CancellationToken cancellationToken)
{
var entity = new Customers
{
CustomerId = request.Id,
Address = request.Address,
City = request.City,
CompanyName = request.CompanyName,
ContactName = request.ContactName,
ContactTitle = request.ContactTitle,
Country = request.Country,
Fax = request.Fax,
Phone = request.Phone,
PostalCode = request.PostalCode
};
_context.Customers.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteCustomerCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Customers
.FindAsync(request.Id);
if (entity == null)
{
throw new NotFoundException(nameof(Customers), request.Id);
}
var hasOrders = _context.Orders.Any(o => o.CustomerId == entity.CustomerId);
if (hasOrders)
{
throw new DeleteFailureException(nameof(Customers), request.Id, "There are existing orders associated with this customer.");
}
_context.Customers.Remove(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
