public ProductMutation(ProductRepository productRepository, MessagingService messagingService)
{
Field <ProductGraphType>(
"createProduct",
arguments: new QueryArguments(new QueryArgument <NonNullGraphType <ProductInputType> > {
Name = "product"
}),
resolve: context =>
{
var product = productRepository.Add(context.GetArgument <Product>("product"));
messagingService.AddProductMutatedMessage(product, "created");
return(product);
}
);
Field <ProductGraphType>(
"updateProduct",
arguments: new QueryArguments(
new QueryArgument <NonNullGraphType <ProductInputType> > {
Name = "product"
}),
resolve: context =>
{
var product = context.GetArgument <Product>("product");
var dbProduct = productRepository.GetById(product.Id);
if (dbProduct == null)
{
context.Errors.Add(new ExecutionError("Couldn't find product in database."));
return(null);
}
var updatedProduct = productRepository.Update(product);
messagingService.AddProductMutatedMessage(product, "updated");
return(updatedProduct);
}
);
Field <BooleanGraphType>(
"deleteProduct",
arguments: new QueryArguments(
new QueryArgument <NonNullGraphType <IntGraphType> > {
Name = "id"
}
),
resolve: context => {
var id = context.GetArgument <int>("id");
var product = productRepository.GetById(id);
if (product == null)
{
context.Errors.Add(new ExecutionError("Couldn't find product in db."));
return(false);
}
productRepository.Delete(id);
messagingService.AddProductMutatedMessage(product, "deleted");
return(true);
}
);
}
