From 37812740c4c03f0a79d17ff186db644a60414ff7 Mon Sep 17 00:00:00 2001
From: lain <lain@soykaf.club>
Date: Fri, 11 Oct 2019 11:48:58 +0200
Subject: [PATCH] Transmogrifier: Correctly save incoming ids for
 Accept/Reject.

---
 lib/pleroma/web/activity_pub/activity_pub.ex  | 25 +++++++++----------
 .../web/activity_pub/transmogrifier.ex        | 10 +++++---
 test/web/activity_pub/transmogrifier_test.exs |  3 +++
 3 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index f78574455..364452b5d 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -269,22 +269,21 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     end
   end
 
-  def accept(%{to: to, actor: actor, object: object} = params) do
-    # only accept false as false value
-    local = !(params[:local] == false)
-
-    with data <- %{"to" => to, "type" => "Accept", "actor" => actor.ap_id, "object" => object},
-         {:ok, activity} <- insert(data, local),
-         :ok <- maybe_federate(activity) do
-      {:ok, activity}
-    end
+  def accept(params) do
+    accept_or_reject("Accept", params)
   end
 
-  def reject(%{to: to, actor: actor, object: object} = params) do
-    # only accept false as false value
-    local = !(params[:local] == false)
+  def reject(params) do
+    accept_or_reject("Reject", params)
+  end
 
-    with data <- %{"to" => to, "type" => "Reject", "actor" => actor.ap_id, "object" => object},
+  def accept_or_reject(type, %{to: to, actor: actor, object: object} = params) do
+    local = Map.get(params, :local, true)
+    activity_id = Map.get(params, :activity_id, nil)
+
+    with data <-
+           %{"to" => to, "type" => type, "actor" => actor.ap_id, "object" => object}
+           |> Utils.maybe_put("id", activity_id),
          {:ok, activity} <- insert(data, local),
          :ok <- maybe_federate(activity) do
       {:ok, activity}
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 64fbb9fa4..b56343beb 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -514,7 +514,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   end
 
   def handle_incoming(
-        %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => _id} = data,
+        %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => id} = data,
         _options
       ) do
     with actor <- Containment.get_actor(data),
@@ -528,7 +528,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         type: "Accept",
         actor: followed,
         object: follow_activity.data["id"],
-        local: false
+        local: false,
+        activity_id: id
       })
     else
       _e -> :error
@@ -536,7 +537,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   end
 
   def handle_incoming(
-        %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => _id} = data,
+        %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => id} = data,
         _options
       ) do
     with actor <- Containment.get_actor(data),
@@ -550,7 +551,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
              type: "Reject",
              actor: followed,
              object: follow_activity.data["id"],
-             local: false
+             local: false,
+             activity_id: id
            }) do
       User.unfollow(follower, followed)
 
diff --git a/test/web/activity_pub/transmogrifier_test.exs b/test/web/activity_pub/transmogrifier_test.exs
index 9f98ec708..6c35a6f4d 100644
--- a/test/web/activity_pub/transmogrifier_test.exs
+++ b/test/web/activity_pub/transmogrifier_test.exs
@@ -909,6 +909,8 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
 
       assert activity.data["object"] == follow_activity.data["id"]
 
+      assert activity.data["id"] == accept_data["id"]
+
       follower = User.get_cached_by_id(follower.id)
 
       assert User.following?(follower, followed) == true
@@ -1013,6 +1015,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
 
       {:ok, activity} = Transmogrifier.handle_incoming(reject_data)
       refute activity.local
+      assert activity.data["id"] == reject_data["id"]
 
       follower = User.get_cached_by_id(follower.id)