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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.MediaProxy.Invalidation.Script do
   6   @moduledoc false
   7
   8   @behaviour Pleroma.Web.MediaProxy.Invalidation
   9
  10   require Logger
  11
  12   @impl Pleroma.Web.MediaProxy.Invalidation
  13   def purge(urls, opts \\ []) do
  14     args =
  15       urls
  16       |> List.wrap()
  17       |> Enum.uniq()
  18       |> Enum.join(" ")
  19
  20     opts
  21     |> Keyword.get(:script_path)
  22     |> do_purge([args])
  23     |> handle_result(urls)
  24   end
  25
  26   defp do_purge(script_path, args) when is_binary(script_path) do
  27     path = Path.expand(script_path)
  28     Logger.debug("Running cache purge: #{inspect(args)}, #{inspect(path)}")
  29     System.cmd(path, args)
  30   rescue
  31     error -> error
  32   end
  33
  34   defp do_purge(_, _), do: {:error, "not found script path"}
  35
  36   defp handle_result({_result, 0}, urls), do: {:ok, urls}
  37   defp handle_result({:error, error}, urls), do: handle_result(error, urls)
  38
  39   defp handle_result(error, _) do
  40     Logger.error("Error while cache purge: #{inspect(error)}")
  41     {:error, inspect(error)}
  42   end
  43 end