20: printproduct group mutation (#21)

* Finished the mutation for productGroups

* Fixes after CR

* added enums for typeid

src/resolvers/products-resolver.ts

@@ -1,6 +1,7 @@
 import { ProductAPI } from '../datasources/product-api';
 import {
   Product,
+  ProductGroup,
   ProductListResult,
   ProductsFilterInput,
 } from '../types/product-types';
@@ -94,6 +95,13 @@ export const productMutationTypeDefs = {
     );
     return (<ProductAPI>dataSources.productApi).getProduct(productId);
   },
+  async productGroup(_, { productId, groupIds }, { dataSources }) {
+    await (<ProductAPI>dataSources.productApi).updateGroups(
+      productId,
+      groupIds,
+    );
+    return (<ProductAPI>dataSources.productApi).getProduct(productId);
+  },
   async productKeywords(_, { productId, keywordIds }, { dataSources }) {
     await (<KeywordAPI>dataSources.keywordApi).setProductKeywords(
       productId,