Improve site-wide url parsing

__tests__/string.test.ts

@@ -0,0 +1,24 @@
+import { makeUrlAbsolute, shortenUrl } from '@/utility/url';
+import '@testing-library/jest-dom';
+
+const URL_LONG_1  = 'https://www.example.com/';
+const URL_LONG_2  = 'https://www.example.com';
+const URL_LONG_3  = 'https://example.com/';
+const URL_LONG_4  = 'http://example.com/';
+const URL_LONG_5  = 'https://example.com';
+const URL_SHORT_1 = 'example.com';
+const URL_SHORT_2 = 'example.com/';
+
+describe('String', () => {
+  it('url can be shortened', () => {
+    expect(shortenUrl(URL_LONG_1)).toBe(URL_SHORT_1);
+    expect(shortenUrl(URL_LONG_2)).toBe(URL_SHORT_1);
+    expect(shortenUrl(URL_LONG_3)).toBe(URL_SHORT_1);
+    expect(shortenUrl(URL_LONG_4)).toBe(URL_SHORT_1);
+    expect(shortenUrl(URL_SHORT_1)).toBe(URL_SHORT_1);
+  });
+  it('url can be made absolute', () => {
+    expect(makeUrlAbsolute(URL_SHORT_1)).toBe(URL_LONG_5);
+    expect(makeUrlAbsolute(URL_SHORT_2)).toBe(URL_LONG_5);
+  });
+});

src/site/config.ts

@@ -1,3 +1,5 @@
+import { makeUrlAbsolute, shortenUrl } from '@/utility/url';
+
 export const SITE_TITLE =
   process.env.NEXT_PUBLIC_SITE_TITLE ||
   'Photo Blog';
@@ -12,8 +14,10 @@ const SITE_DOMAIN =
   process.env.NEXT_PUBLIC_SITE_DOMAIN ||
   VERCEL_URL;
 
+const SITE_DOMAIN_SHORT = shortenUrl(SITE_DOMAIN);
+
 export const SITE_DOMAIN_OR_TITLE =
-  SITE_DOMAIN ||
+  SITE_DOMAIN_SHORT ||
   SITE_TITLE;
 
 export const SITE_DESCRIPTION =
@@ -21,7 +25,7 @@ export const SITE_DESCRIPTION =
   SITE_DOMAIN;
 
 export const BASE_URL = process.env.NODE_ENV === 'production'
-  ? `https://${SITE_DOMAIN}`
+  ? makeUrlAbsolute(SITE_DOMAIN)
   : 'http://localhost:3000';
 
 export const SHOW_REPO_LINK = process.env.NEXT_PUBLIC_HIDE_REPO_LINK !== '1';

src/utility/url.ts

@@ -0,0 +1,10 @@
+// Remove protocol, www, and trailing slash from url
+export const shortenUrl = (url?: string) => url
+  ? url.replace(/^(?:https?:\/\/)?(?:www\.)?/i, '').split('/')[0]
+  : undefined;
+
+// Add protocol to url and remove trailing slash
+export const makeUrlAbsolute = (url = '') =>
+  (!url.startsWith('http')
+    ? `https://${url}`
+    : url).replace(/\/$/, '');