feat: rewrite npmjs.org links (#1573)

Author: shamilkotta

server/utils/readme.ts

@@ -239,8 +239,10 @@ const reservedPathsNpmJs = [
   'policies',
 ]
 
+const npmJsHosts = new Set(['www.npmjs.com', 'npmjs.com', 'www.npmjs.org', 'npmjs.org'])
+
 const isNpmJsUrlThatCanBeRedirected = (url: URL) => {
-  if (url.host !== 'www.npmjs.com' && url.host !== 'npmjs.com') {
+  if (!npmJsHosts.has(url.host)) {
     return false
   }
 

test/unit/server/utils/readme.spec.ts

@@ -341,6 +341,20 @@ describe('Markdown File URL Resolution', () => {
 
       expect(result.html).toContain('href="https://www.npmjs.com/products"')
     })
+
+    it('redirects npmjs.org urls to local', async () => {
+      const markdown = `[Some npmjs.org link](https://www.npmjs.org/package/test-pkg)`
+      const result = await renderReadmeHtml(markdown, 'test-pkg')
+
+      expect(result.html).toContain('href="/package/test-pkg"')
+    })
+
+    it('redirects npmjs.org urls to local (no www and http)', async () => {
+      const markdown = `[Some npmjs.org link](http://npmjs.org/package/test-pkg)`
+      const result = await renderReadmeHtml(markdown, 'test-pkg')
+
+      expect(result.html).toContain('href="/package/test-pkg"')
+    })
   })
 })