fix: adapt base url to netlify (#784)

* fix: adapt base url to netlify

* fix: tests

* fix: netlify constants

* chore: remove comment

gatsby/config-options/constants.ts

@@ -1,10 +1,11 @@
-import { buildGatsbyCloudPreviewUrl } from '../util/build-gatsby-cloud-preview-url';
+import { buildNetlifyPreviewUrl } from '../util/build-netlify-preview-url';
 export const RSS_FEED_URL = '/blog/rss.xml';
 export const DEFAULT_META_IMAGE_URL_PATH = '/sy-share-image.jpg';
-export const GATSBY_SITE_PREFIX = process.env.GATSBY_SITE_PREFIX || '';
-export const BRANCH_PREVIEW_URL = buildGatsbyCloudPreviewUrl({
-  prefix: GATSBY_SITE_PREFIX,
+export const NETLIFY_DOMAIN_NAME = process.env.GATSBY_NETLIFY_DOMAIN_NAME || '';
+export const BRANCH_PREVIEW_URL = buildNetlifyPreviewUrl({
+  domainName: NETLIFY_DOMAIN_NAME,
   branch: process.env.BRANCH,
+  reviewId: process.env.REVIEW_ID,
 });
 
 // either use a branch preview url if any

gatsby/util/build-netlify-preview-url.test.ts

@@ -0,0 +1,30 @@
+import { buildNetlifyPreviewUrl } from './build-netlify-preview-url';
+
+describe('build-netlify-preview-url', () => {
+  test('should return a valid url', () => {
+    const url = buildNetlifyPreviewUrl({
+      domainName: 'satellytes',
+      branch: 'feature-branch-1',
+      reviewId: '123',
+    });
+    expect(url).toBe('https://deploy-preview-123--satellytes.netlify.app/');
+  });
+
+  test('should return null for the production branch', () => {
+    const url = buildNetlifyPreviewUrl({
+      domainName: 'satellytescommain',
+      branch: 'main',
+      reviewId: '123',
+    });
+    expect(url).toBe(null);
+  });
+
+  test('should return  null if no domainName is given', () => {
+    const url = buildNetlifyPreviewUrl({
+      domainName: null,
+      branch: 'something',
+      reviewId: '123',
+    });
+    expect(url).toBe(null);
+  });
+});

gatsby/util/build-netlify-preview-url.ts

@@ -0,0 +1,8 @@
+const PRODUCTION_BRANCH = 'main';
+export const buildNetlifyPreviewUrl = ({ domainName, reviewId, branch }) => {
+  if (!domainName || !reviewId || branch === PRODUCTION_BRANCH) {
+    return null;
+  }
+
+  return `https://deploy-preview-${reviewId}--${domainName}.netlify.app/`;
+};