private void AddOrDeleteProductLinks()

in src/Modules/SimplCommerce.Module.Catalog/Areas/Catalog/Controllers/ProductApiController.cs [786:835]
45 lines of code
9 McCabe index (conditional complexity)

        private void AddOrDeleteProductLinks(ProductForm model, Product product)
        {
            foreach (var relatedProductVm in model.Product.RelatedProducts)
            {
                var productLink = product.ProductLinks.Where(x => x.LinkType == ProductLinkType.Related).FirstOrDefault(x => x.LinkedProductId == relatedProductVm.Id);
                if (productLink == null)
                {
                    productLink = new ProductLink
                    {
                        LinkType = ProductLinkType.Related,
                        Product = product,
                        LinkedProductId = relatedProductVm.Id,
                    };

                    _productLinkRepository.Add(productLink);
                }
            }

            foreach (var productLink in product.ProductLinks.Where(x => x.LinkType == ProductLinkType.Related))
            {
                if (model.Product.RelatedProducts.All(x => x.Id != productLink.LinkedProductId))
                {
                    _productLinkRepository.Remove(productLink);
                }
            }

            foreach (var crossSellProductVm in model.Product.CrossSellProducts)
            {
                var productLink = product.ProductLinks.Where(x => x.LinkType == ProductLinkType.CrossSell).FirstOrDefault(x => x.LinkedProductId == crossSellProductVm.Id);
                if (productLink == null)
                {
                    productLink = new ProductLink
                    {
                        LinkType = ProductLinkType.CrossSell,
                        Product = product,
                        LinkedProductId = crossSellProductVm.Id,
                    };

                    _productLinkRepository.Add(productLink);
                }
            }

            foreach (var productLink in product.ProductLinks.Where(x => x.LinkType == ProductLinkType.CrossSell))
            {
                if (model.Product.CrossSellProducts.All(x => x.Id != productLink.LinkedProductId))
                {
                    _productLinkRepository.Remove(productLink);
                }
            }
        }