user page: link to bridged Bluesky profile

for #825

atproto.py

@@ -147,6 +147,23 @@ class ATProto(User, Protocol):
     def profile_id(self):
         return self.profile_at_uri(self.key.id())
 
+    @classmethod
+    def bridged_web_url_for(cls, user):
+        """Returns a bridged user's profile URL on bsky.app.
+
+        For example, returns ``https://bsky.app/profile/alice.com.web.brid.gy``
+        for Web user ``alice.com``.
+
+        Args:
+          user (models.User)
+
+        Returns:
+          str, or None if there isn't a canonical URL
+        """
+        if not isinstance(user, ATProto):
+            if did := user.get_copy(ATProto):
+                return bluesky.Bluesky.user_url(did_to_handle(did) or did)
+
     @classmethod
     def target_for(cls, obj, shared=False):
         """Returns our PDS URL as the target for the given object.

protocol.py

@@ -354,14 +354,14 @@ class Protocol:
         return (None, None)
 
     @classmethod
-    def bridged_web_url_for(self, user):
+    def bridged_web_url_for(cls, user):
         """Returns the web URL for a user's bridged profile in this protocol.
 
         For example, for Web user ``alice.com``, :meth:`ATProto.bridged_web_url_for`
         returns ``https://bsky.app/profile/alice.com.web.brid.gy``
 
         Args:
-          proto (str or Protocol)
+          user (models.User)
 
         Returns:
           str, or None if there isn't a canonical URL

templates/user_base.html

@@ -62,10 +62,13 @@
      {% if proto and not isinstance(user, proto)
        and proto.LABEL not in ('ui', 'web')
        and (proto.LABEL not in ids.COPIES_PROTOCOLS or proto.LABEL in copies) %}
+      {% set url = proto.bridged_web_url_for(user) %}
       ·
       <nobr title="{{ proto.__name__ }} (bridged)">
+      {% if url %} <a href="{{ url }}"> {% endif %}
         <span class="logo">{{ proto.LOGO_HTML|safe }}</span>
         {{ user.handle_as(proto) }}
+      {% if url %} </a> {% endif %}
       </nobr>
     {% endif %}
   {% endfor %}

tests/test_atproto.py

@@ -142,6 +142,17 @@ class ATProtoTest(TestCase):
     def test_handle_to_id_not_found(self, *_):
         self.assertIsNone(ATProto.handle_to_id('han.dull'))
 
+    def test_bridged_web_url_for(self):
+        self.assertIsNone(ATProto.bridged_web_url_for(ATProto(id='did:plc:foo')))
+
+        fake = Fake(id='fake:user')
+        self.assertIsNone(ATProto.bridged_web_url_for(fake))
+
+        fake.copies = [Target(uri='did:plc:user', protocol='atproto')]
+        self.store_object(id='did:plc:user', raw=DID_DOC)
+        self.assertEqual('https://bsky.app/profile/han.dull',
+                         ATProto.bridged_web_url_for(fake))
+
     def test_pds_for_did_no_doc(self):
         self.assertIsNone(ATProto.pds_for(Object(id='did:plc:user')))