From 13a88bd1a5a13c771d33d327d54125c68bbb9cb3 Mon Sep 17 00:00:00 2001
From: Oneric <oneric@oneric.stub>
Date: Tue, 26 Mar 2024 15:44:44 -0100
Subject: [PATCH] Register APNG MIME type
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The newest git HEAD of MIME already knows about APNG, but this
hasn’t been released yet. Without this, APNG attachments from
remote posts won’t display as images in frontends.

Fixes: akkoma#657
---
 config/config.exs                               |  5 ++++-
 .../attachment_validator_test.exs               | 17 +++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/config/config.exs b/config/config.exs
index e82448f7c..400a80345 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -150,7 +150,10 @@ config :mime, :types, %{
   "application/xrd+xml" => ["xrd+xml"],
   "application/jrd+json" => ["jrd+json"],
   "application/activity+json" => ["activity+json"],
-  "application/ld+json" => ["activity+json"]
+  "application/ld+json" => ["activity+json"],
+  # Can be removed when bumping MIME past 2.0.5
+  # see https://akkoma.dev/AkkomaGang/akkoma/issues/657
+  "image/apng" => ["apng"]
 }
 
 config :tesla, adapter: Tesla.Adapter.Hackney
diff --git a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
index 6627fa6db..744ae8704 100644
--- a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
+++ b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
@@ -13,6 +13,23 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidatorTest do
   import Pleroma.Factory
 
   describe "attachments" do
+    test "works with apng" do
+      attachment =
+        %{
+          "mediaType" => "image/apng",
+          "name" => "",
+          "type" => "Document",
+          "url" =>
+            "https://media.misskeyusercontent.com/io/2859c26e-cd43-4550-848b-b6243bc3fe28.apng"
+        }
+
+      assert {:ok, attachment} =
+               AttachmentValidator.cast_and_validate(attachment)
+               |> Ecto.Changeset.apply_action(:insert)
+
+      assert attachment.mediaType == "image/apng"
+    end
+
     test "fails without url" do
       attachment = %{
         "mediaType" => "",