anonymize_filename.ex (1114B)
- # Pleroma: A lightweight social networking server
- # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
- # SPDX-License-Identifier: AGPL-3.0-only
- defmodule Pleroma.Upload.Filter.AnonymizeFilename do
- @moduledoc """
- Replaces the original filename with a pre-defined text or randomly generated string.
- Should be used after `Pleroma.Upload.Filter.Dedupe`.
- """
- @behaviour Pleroma.Upload.Filter
- alias Pleroma.Config
- alias Pleroma.Upload
- def filter(%Upload{name: name} = upload) do
- extension = List.last(String.split(name, "."))
- name = predefined_name(extension) || random(extension)
- {:ok, :filtered, %Upload{upload | name: name}}
- end
- def filter(_), do: {:ok, :noop}
- @spec predefined_name(String.t()) :: String.t() | nil
- defp predefined_name(extension) do
- with name when not is_nil(name) <- Config.get([__MODULE__, :text]),
- do: String.replace(name, "{extension}", extension)
- end
- defp random(extension) do
- string =
- 10
- |> :crypto.strong_rand_bytes()
- |> Base.url_encode64(padding: false)
- string <> "." <> extension
- end
- end