git.squeep.com Git - akkoma/blob - lib/pleroma/upload/filter/mogrify.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Upload.Filter.Mogrify do
   6   @behaviour Pleroma.Upload.Filter
   7
   8   @type conversion :: action :: String.t() | {action :: String.t(), opts :: String.t()}
   9   @type conversions :: conversion() | [conversion()]
  10
  11   def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
  12     filters = Pleroma.Config.get!([__MODULE__, :args])
  13
  14     file
  15     |> Mogrify.open()
  16     |> mogrify_filter(filters)
  17     |> Mogrify.save(in_place: true)
  18
  19     :ok
  20   end
  21
  22   def filter(_), do: :ok
  23
  24   defp mogrify_filter(mogrify, nil), do: mogrify
  25
  26   defp mogrify_filter(mogrify, [filter | rest]) do
  27     mogrify
  28     |> mogrify_filter(filter)
  29     |> mogrify_filter(rest)
  30   end
  31
  32   defp mogrify_filter(mogrify, []), do: mogrify
  33
  34   defp mogrify_filter(mogrify, {action, options}) do
  35     Mogrify.custom(mogrify, action, options)
  36   end
  37
  38   defp mogrify_filter(mogrify, action) when is_binary(action) do
  39     Mogrify.custom(mogrify, action)
  40   end
  41 end