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

   1 defmodule Pleroma.Upload.Filter.AnonymizeFilename do
   2   @moduledoc """
   3   Replaces the original filename with a pre-defined text or randomly generated string.
   4
   5   Should be used after `Pleroma.Upload.Filter.Dedupe`.
   6   """
   7   @behaviour Pleroma.Upload.Filter
   8
   9   def filter(upload) do
  10     extension = List.last(String.split(upload.name, "."))
  11     name = Pleroma.Config.get([__MODULE__, :text], random(extension))
  12     {:ok, %Pleroma.Upload{upload | name: name}}
  13   end
  14
  15   defp random(extension) do
  16     string =
  17       10
  18       |> :crypto.strong_rand_bytes()
  19       |> Base.url_encode64(padding: false)
  20
  21     string <> "." <> extension
  22   end
  23 end