fix(shared): check external link correctly (#1543)

Co-authored-by: Xinyu Liu <meteor.lxy@foxmail.com>

Author: Mister-Hope

packages/shared/src/utils/isLinkExternal.ts

@@ -1,23 +1,13 @@
-import { isLinkHttp } from './isLinkHttp.js'
+import { isLinkWithProtocol } from './isLinkWithProtocol.js'
 
 const markdownLinkRegexp = /.md((\?|#).*)?$/
 
 /**
  * Determine a link is external or not
  */
-export const isLinkExternal = (link: string, base = '/'): boolean => {
-  if (isLinkHttp(link)) {
-    return true
-  }
-
+export const isLinkExternal = (link: string, base = '/'): boolean =>
+  isLinkWithProtocol(link) ||
   // absolute link that does not start with `base` and does not end with `.md`
-  if (
-    link.startsWith('/') &&
+  (link.startsWith('/') &&
     !link.startsWith(base) &&
-    !markdownLinkRegexp.test(link)
-  ) {
-    return true
-  }
-
-  return false
-}
+    !markdownLinkRegexp.test(link))

packages/shared/tests/isLinkExternal.spec.ts

@@ -20,13 +20,13 @@ const testCases: [
   [['//foobar.com/base/README.md', '/base/'], true],
 
   // links with other protocols
-  [['mailto:foobar', '/base/'], false],
-  [['tel:foobar', '/base/'], false],
-  [['ftp://foobar.com'], false],
-  [['ftp://foobar.com', '/base/'], false],
-  [['ftp://foobar.com/base/README.md'], false],
-  [['ftp://foobar.com/base/README.md', '/base/'], false],
-  [['ms-windows-store://home', '/base/'], false],
+  [['mailto:foobar', '/base/'], true],
+  [['tel:foobar', '/base/'], true],
+  [['ftp://foobar.com'], true],
+  [['ftp://foobar.com', '/base/'], true],
+  [['ftp://foobar.com/base/README.md'], true],
+  [['ftp://foobar.com/base/README.md', '/base/'], true],
+  [['ms-windows-store://home', '/base/'], true],
 
   // absolute links
   [['/foo/bar'], false],