From 9caa0b0be1feffb20b3eaccb48298de572d32393 Mon Sep 17 00:00:00 2001
From: Mark Felder <feld@feld.me>
Date: Mon, 29 May 2023 15:46:49 -0400
Subject: Add OnlyMedia Upload Filter to simplify restricting uploads to audio,
 image, and video types

---
 lib/pleroma/upload/filter.ex            |  6 +++---
 lib/pleroma/upload/filter/only_media.ex | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)
 create mode 100644 lib/pleroma/upload/filter/only_media.ex

(limited to 'lib')

diff --git a/lib/pleroma/upload/filter.ex b/lib/pleroma/upload/filter.ex
index 717f06621..809bc6e70 100644
--- a/lib/pleroma/upload/filter.ex
+++ b/lib/pleroma/upload/filter.ex
@@ -38,9 +38,9 @@ defmodule Pleroma.Upload.Filter do
       {:ok, :noop} ->
         filter(rest, upload)
 
-      error ->
-        Logger.error("#{__MODULE__}: Filter #{filter} failed: #{inspect(error)}")
-        error
+      {:error, e} ->
+        Logger.error("#{__MODULE__}: Filter #{filter} failed: #{inspect(e)}")
+        {:error, e}
     end
   end
 end
diff --git a/lib/pleroma/upload/filter/only_media.ex b/lib/pleroma/upload/filter/only_media.ex
new file mode 100644
index 000000000..a9caeba67
--- /dev/null
+++ b/lib/pleroma/upload/filter/only_media.ex
@@ -0,0 +1,20 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.OnlyMedia do
+  @behaviour Pleroma.Upload.Filter
+  alias Pleroma.Upload
+
+  def filter(%Upload{content_type: content_type}) do
+    [type, _subtype] = String.split(content_type, "/")
+
+    if type in ["image", "video", "audio"] do
+      {:ok, :noop}
+    else
+      {:error, "Disallowed content-type: #{content_type}"}
+    end
+  end
+
+  def filter(_), do: {:ok, :noop}
+end
-- 
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