fix: Process Accept activities

fly.toml

@@ -21,9 +21,9 @@ kill_signal = 'SIGTERM'
 [http_service]
   internal_port = 8080
   force_https = true
-  auto_stop_machines = 'stop'
+  auto_stop_machines = false
   auto_start_machines = true
-  min_machines_running = 0
+  min_machines_running = 1
   processes = ['app']
 
   [http_service.concurrency]

lib/postland/activities.ex

@@ -23,11 +23,20 @@ defmodule Postland.Activities do
     |> Repo.insert()
   end
 
-  def cause_effects(%Activity{actor_id: actor_id, type: "Accept", data: %{"object" => %{"type" => "Follow"}}} = activity) do
+  def cause_effects(%Activity{type: "Accept", data: %{"object" => %{"type" => "Follow", "id" => follow_id}}} = activity) do
+    pattern = ~r|/follows/([^/]+)|
+
+    actor_id = case Regex.run(pattern, follow_id) do
+      [_, encoded_actor_id] ->
+        dbg(encoded_actor_id)
+        Base.url_decode64!(encoded_actor_id, padding: false)
+
+      _other ->
+        nil
+    end
+
     case Follows.get(Postland.my_actor_id(), actor_id) do
       nil ->
-        # TODO: Need to handle the scenario where the we're following has an alias (/@foobar becomes /users/foobar by the time
-        #   they Accept)
         Logger.warning("Got accept for a follow we don't have in the db: #{actor_id}")
 
         {:ok, activity}

lib/postland/follows.ex

@@ -20,8 +20,8 @@ defmodule Postland.Follows do
   end
 
   def send_follow_request(to_actor_id) do
-    encoded_followee = Base.url_encode64(to_actor_id)
-    encoded_follower = Base.url_encode64(Postland.my_actor_id())
+    encoded_followee = Base.url_encode64(to_actor_id, padding: false)
+    encoded_follower = Base.url_encode64(Postland.my_actor_id(), padding: false)
 
     {:ok, actor} = ActivityPub.fetch_actor(to_actor_id)
     inbox = Map.get(actor, "inbox")