Only warn on links to bsky.app if it represents itself as another url (#1662)

* Only warn on links to bsky.app if it represents itself as another url (close #1652)

* Clean up

2 files changed, 58 insertions, 5 deletions

diff --git a/__tests__/lib/strings/url-helpers.test.ts b/__tests__/lib/strings/url-helpers.test.ts
index 3055a9ef6..8bb52ed40 100644
--- a/__tests__/lib/strings/url-helpers.test.ts
+++ b/__tests__/lib/strings/url-helpers.test.ts
@@ -27,6 +27,42 @@ describe('linkRequiresWarning', () => {
     ['http://site.pages', 'http://site.pages.dev', true],
     ['http://site.pages.dev', 'site.pages', true],
     ['http://site.pages', 'site.pages.dev', true],
+    ['http://bsky.app/profile/bob.test/post/3kbeuduu7m22v', 'my post', false],
+    ['https://bsky.app/profile/bob.test/post/3kbeuduu7m22v', 'my post', false],
+    ['http://bsky.app/', 'bluesky', false],
+    ['https://bsky.app/', 'bluesky', false],
+    [
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      false,
+    ],
+    [
+      'https://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      false,
+    ],
+    [
+      'http://bsky.app/',
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      false,
+    ],
+    [
+      'https://bsky.app/',
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      false,
+    ],
+    [
+      'http://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      'https://google.com',
+      true,
+    ],
+    [
+      'https://bsky.app/profile/bob.test/post/3kbeuduu7m22v',
+      'https://google.com',
+      true,
+    ],
+    ['http://bsky.app/', 'https://google.com', true],
+    ['https://bsky.app/', 'https://google.com', true],
 
     // bad uri inputs, default to true
     ['', '', true],
diff --git a/src/lib/strings/url-helpers.ts b/src/lib/strings/url-helpers.ts
index 3c27d8639..106d2ca31 100644
--- a/src/lib/strings/url-helpers.ts
+++ b/src/lib/strings/url-helpers.ts
@@ -170,15 +170,32 @@ export function getYoutubeVideoId(link: string): string | undefined {
 
 export function linkRequiresWarning(uri: string, label: string) {
   const labelDomain = labelToDomain(label)
-  if (!labelDomain) {
-    return true
-  }
+  let urip
   try {
-    const urip = new URL(uri)
-    return labelDomain !== urip.hostname
+    urip = new URL(uri)
   } catch {
     return true
   }
+
+  if (urip.hostname === 'bsky.app') {
+    // if this is a link to internal content,
+    // warn if it represents itself as a URL to another app
+    if (
+      labelDomain &&
+      labelDomain !== 'bsky.app' &&
+      isPossiblyAUrl(labelDomain)
+    ) {
+      return true
+    }
+    return false
+  } else {
+    // if this is a link to external content,
+    // warn if the label doesnt match the target
+    if (!labelDomain) {
+      return true
+    }
+    return labelDomain !== urip.hostname
+  }
 }
 
 function labelToDomain(label: string): string | undefined {