From df71c142cfadaae8866303768bca00c343b8bed1 Mon Sep 17 00:00:00 2001
From: Roger Braun <roger@rogerbraun.net>
Date: Wed, 3 May 2017 16:08:24 +0200
Subject: [PATCH] Remove doubled 'to' recipients.

---
 lib/pleroma/web/activity_pub/activity_pub.ex | 2 +-
 test/web/activity_pub/activity_pub_test.exs  | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 194a5ec3d..f18f3df2e 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -24,7 +24,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
     activity = %{
       "type" => "Create",
-      "to" => to,
+      "to" => to |> Enum.uniq,
       "actor" => actor.ap_id,
       "object" => object,
       "published" => published,
diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs
index 6e42fbda2..dfa73b775 100644
--- a/test/web/activity_pub/activity_pub_test.exs
+++ b/test/web/activity_pub/activity_pub_test.exs
@@ -40,6 +40,13 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
     end
   end
 
+  describe "create activities" do
+    test "removes doubled 'to' recipients" do
+      {:ok, activity} = ActivityPub.create(["user1", "user1", "user2"], %User{ap_id: "1"}, "", %{})
+      assert activity.data["to"] == ["user1", "user2"]
+    end
+  end
+
   describe "fetch activities for recipients" do
     test "retrieve the activities for certain recipients" do
       {:ok, activity_one} = ActivityBuilder.insert(%{"to" => ["someone"]})