Add related mutations (#43)

src/resolvers/products-resolver.ts

@@ -161,4 +161,23 @@ export const productMutationTypeDefs = {
     );
     return (<ProductAPI>dataSources.productApi).getProduct(productId);
   },
+  async addRelatedProducts(_, { productId, articleNumbers }, { dataSources }) {
+    await (<ProductAPI>dataSources.productApi).addRelatedProducts(
+      productId,
+      articleNumbers,
+    );
+    return (<ProductAPI>dataSources.productApi).getProduct(productId);
+  },
+
+  async removeRelatedProducts(
+    _,
+    { productId, relatedProductIds },
+    { dataSources },
+  ) {
+    await (<ProductAPI>dataSources.productApi).removeRelatedProducts(
+      productId,
+      relatedProductIds,
+    );
+    return (<ProductAPI>dataSources.productApi).getProduct(productId);
+  },
 };