Upload filter: anonymize filename

It replaces the original filename with a randomly generated string.

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/pleroma/upload/filter/anonymize_filename.ex b/lib/pleroma/upload/filter/anonymize_filename.ex
new file mode 100644
index 000000000..a83e764e5
--- /dev/null
+++ b/lib/pleroma/upload/filter/anonymize_filename.ex
@@ -0,0 +1,10 @@
+defmodule Pleroma.Upload.Filter.AnonymizeFilename do
+  @moduledoc "Replaces the original filename with a randomly generated string."
+  @behaviour Pleroma.Upload.Filter
+
+  def filter(upload) do
+    extension = List.last(String.split(upload.name, "."))
+    string = Base.url_encode64(:crypto.strong_rand_bytes(10), padding: false)
+    {:ok, %Pleroma.Upload{upload | name: string <> "." <> extension}}
+  end
+end