Web.send: improve logic for skipping sends to followers

should stop the unrelated webmentions going to @gRegorLove et al

tests/test_web.py

@@ -1,7 +1,6 @@
 # coding=utf-8
 """Unit tests for webmention.py."""
 import copy
-from unittest import skip
 from unittest.mock import patch
 from urllib.parse import urlencode
 
@@ -1962,7 +1961,35 @@ class WebUtilTest(TestCase):
 
         self.assertFalse(Web.send(
             Object(id='http://mas.to/note', as2=test_activitypub.NOTE),
-            'https://user.com/post'))
+            'https://user.com/'))
+        mock_get.assert_not_called()
+        mock_post.assert_not_called()
+
+    def test_send_unrelated_repost_does_nothing(self, mock_get, mock_post):
+        Follower.get_or_create(
+            to=self.make_user('https://mas.to/bob', cls=ActivityPub),
+            from_=g.user)
+
+        self.assertFalse(Web.send(
+            Object(id='http://mas.to/note', as2={
+                **test_activitypub.REPOST,
+                'actor': 'https://mas.to/bob',
+            }),
+            'https://user.com/'))
+        mock_get.assert_not_called()
+        mock_post.assert_not_called()
+
+    def test_send_unrelated_reply_does_nothing(self, mock_get, mock_post):
+        Follower.get_or_create(
+            to=self.make_user('https://mas.to/bob', cls=ActivityPub),
+            from_=g.user)
+
+        self.assertFalse(Web.send(
+            Object(id='http://mas.to/note', as2={
+                **test_activitypub.REPLY,
+                'actor': 'https://mas.to/bob',
+            }),
+            'https://user.com/'))
         mock_get.assert_not_called()
         mock_post.assert_not_called()
 
@@ -2037,11 +2064,6 @@ class WebUtilTest(TestCase):
 """, html, ignore_blanks=True)
         self.assertEqual({'Content-Type': 'text/html; charset=utf-8'}, headers)
 
-    @skip
-    def test_target_for_not_web_fails(self, _, __):
-        with self.assertRaises(AssertionError):
-            Web.target_for(Object(id='x', source_protocol='ap'))
-
     def test_target_for(self, _, __):
         self.assertIsNone(Web.target_for(Object(id='x', source_protocol='web')))
 

web.py

@@ -276,17 +276,12 @@ class Web(User, Protocol):
         or if webmention/microformats2 don't support the activity type.
         https://fed.brid.gy/docs#error-handling
         """
-        # we only send webmentions for responses. for normal posts etc, we just
-        # update our stored objects (elsewhere) and web users consume them via
-        # feeds.
-        type = obj.as1.get('objectType')
+        # we only send webmentions for responses. for sending normal posts etc
+        # to followers, we just update our stored objects (elsewhere) and web
+        # users consume them via feeds.
         verb = obj.as1.get('verb')
-        in_reply_to = as1.get_object(obj.as1).get('inReplyTo')
-        if (type != 'activity'
-                # TODO: do we need undo for anything?
-                or verb in ('undo', 'accept')
-                or (verb in ('post', 'update', 'delete') and not in_reply_to)):
-            logger.info(f'Skipping sending {type} {verb} activity to {url}')
+        if verb in ('accept', 'undo') or url not in as1.targets(obj.as1):
+            logger.info(f'Skipping sending to {url}')
             return False
 
         source_url = obj.proxy_url()