Feat: Add support for custom APIs @W-15585881@ (#402)

* add custom API helper

* add unit tests

* lint

* update docs

* update README

* move custom api param type from core to commerce-sdk

* update unit test

* update unit tests and add flag for transforming request body

* update property name

* update README example with enableTransformBody example

* update example in README

* revert template changes

* update customApiParameters type

* consume new commerce-sdk-core

Author: joeluong-sfcc

CHANGELOG.md

@@ -10,6 +10,12 @@ only use JavaScript, or if you use TypeScript but only import the client classes
 then your usage **will not change**. You will likely only need to make changes if
 you import the type definitions directly.
 
+## v2.16.0-dev
+
+#### Enchancements
+
+- Add helper function `customApiHelper.callCustomEndpoint` to call [Custom APIs](https://developer.salesforce.com/docs/commerce/commerce-api/guide/custom-apis.html) - [#402](https://github.com/SalesforceCommerceCloud/commerce-sdk/pull/402)
+
 ## v2.15.0
 
 #### API Changes

README.md

@@ -229,6 +229,91 @@ const searchResults = await searchClient.productSearch({
 
 Invalid query parameters that are not a part of the API and do not follow the `c_` custom query parameter convention will be filtered from the request and a warning will be displayed.
 
+### Custom APIs
+
+The SDK supports calling [custom APIs](https://developer.salesforce.com/docs/commerce/commerce-api/guide/custom-apis.html) with a helper function, `customApiHelper.callCustomEndpoint()`.
+
+Example usage:
+
+```javascript
+import * as CommerceSdk from "commerce-sdk";
+const { helpers } = CommerceSdk;
+
+// client configuration parameters
+const clientConfigExample = {
+  parameters: {
+    clientId: '<your-client-id>',
+    organizationId: '<your-org-id>',
+    shortCode: '<your-short-code>',
+    siteId: '<your-site-id>',
+  },
+  // If not provided, it'll use the default production URI:
+  // 'https://{shortCode}.api.commercecloud.salesforce.com/custom/{apiName}/{apiVersion}'
+  // path parameters should be wrapped in curly braces like the default production URI
+  baseUri: '<your-base-uri>'
+};
+
+const access_token = '<INSERT_ACCESS_TOKEN_HERE>'
+
+// Required params: apiName, endpointPath, shortCode, organizaitonId
+// Required path params can be passed into:
+// options.customApiPathParameters or clientConfig.parameters
+// customApiPathParameters will take priority for duplicate values
+const customApiArgs = { 
+  apiName: 'loyalty-info',
+  apiVersion: 'v1', // defaults to v1 if not provided
+  endpointPath: 'customers'
+}
+
+const getResponse = await helpers.callCustomEndpoint({ 
+  options: {
+    // http operation is defaulted to 'GET' if not provided
+    method: 'GET',
+    parameters: {
+      queryParameter: 'queryParameter1',
+    },
+    headers: {
+      // Content-Type is defaulted to application/json if not provided
+      'Content-type': 'application/json',
+      authorization: `Bearer ${access_token}`
+    },
+    customApiPathParameters: customApiArgs,
+  }, 
+  clientConfig: clientConfigExample,
+  // Flag to retrieve raw response or data from helper function
+  rawResponse: false
+})
+
+const postResponse = await customApiHelper.callCustomEndpoint({ 
+  options: {
+    method: 'POST',
+    headers: {
+      authorization: `Bearer ${access_token}`
+    },
+    customApiPathParameters: {
+      apiVersion: 'v1',
+      endpointPath: 'greeting',
+      apiName: 'e2e-tests',
+    },
+    // When this flag is set to true, the request body will be automatically 
+    // formatted in the expected format set by the 'Content-type' headers
+    // 'application/json' or 'application/x-www-form-urlencoded'
+    enableTransformBody: true,
+
+    // object can be passed since we have enableTransformBody set to true
+    body: { data: 'data' }
+    // if enableTransformBody is not set to true,
+    // we have to ensure the request body is correctly formatted
+    // body: JSON.stringify({ data: 'data' })
+  }, 
+  clientConfig: clientConfigExample, 
+  rawResponse: false
+})
+
+console.log('get response: ', getResponse)
+console.log('post response: ', postResponse)
+```
+
 ## Caching
 
 The SDK currently supports two types of caches - In-memory and Redis. Both the implementations respect [standard cache headers](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control). To use another type of cache, write your own implementation of the [CacheManager](https://github.com/SalesforceCommerceCloud/commerce-sdk-core/tree/main/src/base/cacheManager.ts). See the [default cache manager](https://github.com/SalesforceCommerceCloud/commerce-sdk-core/tree/main/src/base/cacheManagerKeyv.ts) to design your implementation.

package-lock.json

@@ -43,7 +43,7 @@
     ]
   },
   "dependencies": {
-    "@commerce-apps/core": "^1.6.1",
+    "@commerce-apps/core": "^1.7.0",
     "nanoid": "^3.3.4",
     "retry": "^0.13.1",
     "tslib": "^2.4.1"

package.json

@@ -5,5 +5,10 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
  */
 
+import { getShopperToken } from "./shopperCustomer"
+import { callCustomEndpoint } from "./customApi";
+export const helpers = {
+    callCustomEndpoint,
+    getShopperToken
+}
 export * as slasHelpers from "./slas";
-export * as helpers from "./shopperCustomer";

src/static/helperTemplates/index.ts.hbs

@@ -0,0 +1,8 @@
+/*
+ * Copyright (c) 2022, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+export const CUSTOM_API_DEFAULT_BASE_URI =
+  "https://{shortCode}.api.commercecloud.salesforce.com/custom/{apiName}/{apiVersion}";