git.squeep.com Git - akkoma/blob - lib/pleroma/upload/filter/dedupe.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.Dedupe do
   6   @behaviour Pleroma.Upload.Filter
   7   alias Pleroma.Upload
   8
   9   def filter(upload = %Upload{name: name}) do
  10     extension = String.split(name, ".") |> List.last()
  11     shasum = :crypto.hash(:sha256, File.read!(upload.tempfile)) |> Base.encode16(case: :lower)
  12     filename = shasum <> "." <> extension
  13     {:ok, %Upload{upload | id: shasum, path: filename}}
  14   end
  15 end