Merge pull request #46 from Photowall/148-add-mutations-for-categories

src/datasources/product-api.ts

@@ -621,4 +621,32 @@ export class ProductAPI extends BaseSQLDataSource {
     promises.push(query);
     return Promise.all(promises);
   }
+
+  async addCategoriesToProduct(
+    productId,
+    categoryIds,
+  ): Promise<Promise<void>[]> {
+    const promises = categoryIds.map((categoryId) =>
+      this.knex('product_category').insert({
+        product_id: productId,
+        category_id: categoryId,
+      }),
+    );
+    return Promise.all(promises);
+  }
+
+  async removeCategoriesFromProduct(
+    productId,
+    categoryIds,
+  ): Promise<Promise<void>[]> {
+    const promises = categoryIds.map((categoryId) =>
+      this.knex('product_category')
+        .where({
+          product_id: productId,
+          category_id: categoryId,
+        })
+        .del(),
+    );
+    return Promise.all(promises);
+  }
 }