From e0c8f8e142d7cca613923b48943cb8a718fa7a55 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Sun, 26 Apr 2020 16:25:48 -0400
Subject: [PATCH] Deduplicate incoming followers

---
 lib/clacks/inbox.ex | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/clacks/inbox.ex b/lib/clacks/inbox.ex
index 107c6ff..b9b5a00 100644
--- a/lib/clacks/inbox.ex
+++ b/lib/clacks/inbox.ex
@@ -42,7 +42,8 @@ defmodule Clacks.Inbox do
 
     store_activity(activity)
 
-    changeset = Actor.changeset(followed, %{followers: [follower_id | followed.followers]})
+    new_followers = [follower_id | followed.followers] |> Enum.uniq()
+    changeset = Actor.changeset(followed, %{followers: new_followers})
 
     case Repo.update(changeset) do
       {:error, changeset} ->