P5 7619 refactor products to return list (#11)

src/resolvers/products-resolver.ts

@@ -1,6 +1,10 @@
 import { IResolverObject } from 'graphql-tools';
 import { ProductAPI } from '../datasources/product-api';
-import { Product } from '../types/product-types';
+import {
+  Product,
+  ProductListResult,
+  ProductsFilterInput,
+} from '../types/product-types';
 import { CategoryAPI } from '../datasources/category-api';
 import { Category } from '../types/category-types';
 import { KeywordAPI } from '../datasources/keyword-api';
@@ -21,7 +25,7 @@ const Product: IResolverObject = {
   async categories({ id }, _args, { dataSources }): Promise<Array<Category>> {
     return (<CategoryAPI>dataSources.categoryApi).getProductCategories(id);
   },
-  async designer({ designerId }, args, { dataSources }) {
+  async designer({ designerId }, _args, { dataSources }) {
     if (!designerId) {
       return null;
     }
@@ -41,16 +45,22 @@ const PrintProduct: IResolverObject = {
   },
 };
 
-async function getProducts(
+async function getProductsResult(
   _,
-  { limit, visible, browsable },
+  input: ProductsFilterInput,
   { dataSources },
-): Promise<Array<Product>> {
-  return (<ProductAPI>dataSources.productApi).getProducts(
-    limit,
-    visible,
-    browsable,
-  );
+): Promise<ProductListResult> {
+  const total = (<ProductAPI>dataSources.productApi).getProductsTotal(input);
+  const items = (<ProductAPI>dataSources.productApi).getProducts(input);
+
+  return {
+    pagination: {
+      limit: input.pagination.limit,
+      offset: 0, // TODO: this will be implemented later if the client app needs it
+      total: total,
+    },
+    items: items,
+  };
 }
 
 async function getProduct(_, { id }, { dataSources }): Promise<Product> {
@@ -64,11 +74,11 @@ export const productTypeDefs = {
 };
 
 export const productQueryTypeDefs = {
-  products: getProducts,
+  products: getProductsResult,
   product: getProduct,
 };
 
-// Mutations below
+// Mutations below, embryo stage
 
 export const productMutationTypeDefs = {
   addKeyword(_, { productId, keywordId }, { dataSources }) {