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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Upload.Filter.Exiftool do
   6   @moduledoc """
   7   Strips GPS related EXIF tags and overwrites the file in place.
   8   Also strips or replaces filesystem metadata e.g., timestamps.
   9   """
  10   @behaviour Pleroma.Upload.Filter
  11
  12   require Logger
  13
  14   def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
  15     if Pleroma.Utils.command_available?("exiftool") do
  16       System.cmd("exiftool", ["-overwrite_original", "-gps:all=", file], parallelism: true)
  17       :ok
  18     else
  19       {:error, "exiftool command not found"}
  20     end
  21   end
  22
  23   def filter(_), do: :ok
  24 end