Bluesky => fediverse: link mentions of non-bridged users to their bsky.app profile

fixes #1288

ids.py

@@ -148,6 +148,9 @@ def translate_user_id(*, id, from_, to):
             return id
 
         case _, 'activitypub' | 'web':
+            from activitypub import ActivityPub
+            if user and not user.is_enabled(ActivityPub):
+                return user.web_url()
             return subdomain_wrap(from_, f'/{to.ABBREV}/{id}')
 
         # only for unit tests

tests/test_activitypub.py

@@ -2819,6 +2819,63 @@ class ActivityPubUtilsTest(TestCase):
             }],
         }, ActivityPub.convert(obj), ignore=['contentMap', 'content_is_html', 'to'])
 
+    def test_send_convert_mention_non_bridged_id_uses_profile_url(self):
+        self.store_object(id='did:plc:5zspv27pk4iqtrl2ql2nykjh', raw={'foo': 'bar'})
+        self.make_user(id='did:plc:5zspv27pk4iqtrl2ql2nykjh', cls=ATProto)
+        obj = Object(our_as1={
+            'objectType': 'note',
+            'content': 'hello @snarfed2.bsky.social',
+            'tags': [{
+                'objectType': 'mention',
+                'url': 'did:plc:5zspv27pk4iqtrl2ql2nykjh',
+                'displayName': '@snarfed2.bsky.social',
+                'startIndex': 6,
+                'length': 21,
+            }],
+        })
+        self.assertEqual({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            'type': 'Note',
+            'content': '<p>hello <a href="https://bsky.app/profile/did:plc:5zspv27pk4iqtrl2ql2nykjh">@snarfed2.bsky.social</a></p>',
+            'contentMap': {'en': '<p>hello <a href="https://bsky.app/profile/did:plc:5zspv27pk4iqtrl2ql2nykjh">@snarfed2.bsky.social</a></p>'},
+            'tag': [{
+                'type': 'Mention',
+                'name': '@snarfed2.bsky.social',
+                'href': 'https://bsky.app/profile/did:plc:5zspv27pk4iqtrl2ql2nykjh',
+            }],
+            'to': ['https://www.w3.org/ns/activitystreams#Public'],
+            'cc': ['https://bsky.app/profile/did:plc:5zspv27pk4iqtrl2ql2nykjh'],
+            'content_is_html': True,
+        }, ActivityPub.convert(obj))
+
+    @patch('requests.post', return_value=requests_response())
+    def test_send_dm(self, mock_post):
+        bot = self.make_user('web.brid.gy', cls=Web)
+        user = self.make_user(ACTOR['id'], cls=ActivityPub, obj_as2=ACTOR)
+
+        dm = Object(id='https://internal.brid.gy/dm', source_protocol='web', our_as1={
+            'objectType': 'note',
+            'author': 'web.brid.gy',
+            'content': 'hello world',
+            'to': [ACTOR['id']],
+        })
+        dm.put()
+        self.assertTrue(ActivityPub.send(dm, ACTOR['inbox'], from_user=bot))
+
+        self.assertEqual(1, len(mock_post.call_args_list))
+        args, kwargs = mock_post.call_args_list[0]
+        self.assertEqual((ACTOR['inbox'],), args)
+        self.assertEqual({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            'type': 'Note',
+            'id': 'http://localhost/r/https://internal.brid.gy/dm',
+            'attributedTo': 'https://web.brid.gy/web.brid.gy',
+            'content': '<p>hello world</p>',
+            'contentMap': {'en': '<p>hello world</p>'},
+            'content_is_html': True,
+            'to': [ACTOR['id']],
+        }, json_loads(kwargs['data']))
+
     def test_postprocess_as2_idempotent(self):
         for obj in (ACTOR, REPLY_OBJECT, REPLY_OBJECT_WRAPPED, REPLY,
                     NOTE_OBJECT, NOTE, MENTION_OBJECT, MENTION, LIKE,

tests/test_ids.py

@@ -25,13 +25,19 @@ class IdsTest(TestCase):
         Fake(id='fake:user',
              copies=[Target(uri='did:plc:789', protocol='atproto')]).put()
 
-        # DID doc and ATProto, used to resolve handle in bsky.app URL
+        # ATProto with DID docs, used to resolve handle in bsky.app URL
         did = self.store_object(id='did:plc:123', raw={
             'id': 'did:plc:123',
             'alsoKnownAs': ['at://user.com'],
         })
         ATProto(id='did:plc:123', obj_key=did.key).put()
 
+        did = self.store_object(id='did:plc:000', raw={
+            'id': 'did:plc:000',
+            'alsoKnownAs': ['at://zero.com'],
+        })
+        ATProto(id='did:plc:000').put()
+
         for from_, id, to, expected in [
             (ActivityPub, 'https://inst/user', ActivityPub, 'https://inst/user'),
             (ActivityPub, 'https://inst/user', ATProto, 'did:plc:456'),
@@ -54,6 +60,9 @@ class IdsTest(TestCase):
             (ATProto, 'https://bsky.app/profile/user.com', ATProto, 'did:plc:123'),
             (ATProto, 'https://bsky.app/profile/did:plc:123', ATProto, 'did:plc:123'),
 
+            # user, not enabled, no copy
+            (ATProto, 'did:plc:000', ActivityPub, 'https://bsky.app/profile/zero.com'),
+
             (Fake, 'fake:user', ActivityPub, 'https://fa.brid.gy/ap/fake:user'),
             (Fake, 'fake:user', ATProto, 'did:plc:789'),
             (Fake, 'fake:user', Fake, 'fake:user'),