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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.Web.Plugs.FrontendStatic do
   6   require Pleroma.Constants
   7
   8   @moduledoc """
   9   This is a shim to call `Plug.Static` but with runtime `from` configuration`. It dispatches to the different frontends.
  10   """
  11   @behaviour Plug
  12
  13   def file_path(path, frontend_type \\ :primary) do
  14     if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
  15       instance_static_path = Pleroma.Config.get([:instance, :static_dir], "instance/static")
  16
  17       Path.join([
  18         instance_static_path,
  19         "frontends",
  20         configuration["name"],
  21         configuration["ref"],
  22         path
  23       ])
  24     else
  25       nil
  26     end
  27   end
  28
  29   def init(opts) do
  30     opts
  31     |> Keyword.put(:from, "__unconfigured_frontend_static_plug")
  32     |> Plug.Static.init()
  33     |> Map.put(:frontend_type, opts[:frontend_type])
  34   end
  35
  36   def call(conn, opts) do
  37     frontend_type = Map.get(opts, :frontend_type, :primary)
  38     path = file_path("", frontend_type)
  39
  40     if path do
  41       conn
  42       |> call_static(opts, path)
  43     else
  44       conn
  45     end
  46   end
  47
  48   defp call_static(conn, opts, from) do
  49     opts =
  50       opts
  51       |> Map.put(:from, from)
  52
  53     Plug.Static.call(conn, opts)
  54   end
  55 end