Implement S2S processing for unfollows

README.md

@@ -37,7 +37,7 @@ Enjoy your new "extremely hardcore" ActivityPub server!!! 🎉😎🚀🙃🥳
 
 Since Fuwuqi's code is super duper easy to read and extend, the following features are left as an exercise to the reader:
 - Multi-user support (hint: dynamically generate `.well-known/webfinger` instead of serving a static file)
-- S2S server-side processing for likes and announces
+- S2S processing for likes and announces
 - Deleting posts
 - JSON-LD (hint: don't do it, your brain will thank you)
 - Lots of pain

server.py

@@ -98,6 +98,10 @@ class fuwuqi(SimpleHTTPRequestHandler):
             if activity['type'] == 'Accept' and activity['actor'] == activity['object']['object']:
                 # Follow request accepted
                 collection_append(username, 'following', activity['actor'])
+            elif activity['type'] == 'Undo' and activity['object']['type'] == 'Follow' and \
+                 activity['actor'] == activity['object']['actor']:
+                # Unfollow request
+                collection_remove(username, 'followers', activity['actor'])
         elif self.path.endswith('outbox'):
             # C2S
             collection_append(username, 'outbox', activity)