From 25733322140d13a08e723b9366646cf971a84381 Mon Sep 17 00:00:00 2001
From: Francis Dinh <normandy@firemail.cc>
Date: Mon, 21 May 2018 04:35:43 -0400
Subject: [PATCH] Add undo block handler

---
 .../web/activity_pub/transmogrifier.ex        | 23 ++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 20b1603df..24e876efb 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -247,10 +247,10 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
           "object" => %{"type" => "Follow", "object" => followed},
           "actor" => follower,
           "id" => id
-        } = data
+        } = _data
       ) do
-    with %User{local: true} = followed = User.get_cached_by_ap_id(followed),
-         %User{} = follower = User.get_or_fetch_by_ap_id(follower),
+    with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
+         %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
          {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
       User.unfollow(follower, followed)
       {:ok, activity}
@@ -259,6 +259,23 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
+  def handle_incoming(
+        %{
+          "type" => "Undo",
+          "object" => %{"type" => "Block", "object" => blocked},
+          "actor" => blocker,
+          "id" => id
+        } = _data
+      ) do
+    with %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
+         %User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
+         {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
+      {:ok, activity}
+    else
+      e -> :error
+    end
+  end
+
   def handle_incoming(
         %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
       ) do
-- 
2.45.2