frontend_static.ex
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frontend_static.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Plugs.FrontendStatic do
	require Pleroma.Constants

	@moduledoc """
	This is a shim to call `Plug.Static` but with runtime `from` configuration`. It dispatches to the different frontends.
	"""
	@behaviour Plug

	def file_path(path, frontend_type \\ :primary) do
	if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
	instance_static_path = Pleroma.Config.get([:instance, :static_dir], "instance/static")

	Path.join([
	instance_static_path,
	"frontends",
	configuration["name"],
	configuration["ref"],
	path
	])
	else
	nil
	end
	end

	def init(opts) do
	opts
	\|> Keyword.put(:from, "__unconfigured_frontend_static_plug")
	\|> Plug.Static.init()
	end

	def call(conn, opts) do
	frontend_type = Map.get(opts, :frontend_type, :primary)
	path = file_path("", frontend_type)

	if path do
	conn
	\|> call_static(opts, path)
	else
	conn
	end
	end

	defp call_static(conn, opts, from) do
	opts =
	opts
	\|> Map.put(:from, from)

	Plug.Static.call(conn, opts)
	end
	end