transfer_task.ex
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transfer_task.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Config.TransferTask do
	use Task
	alias Pleroma.Web.AdminAPI.Config

	def start_link do
	load_and_update_env()
	if Pleroma.Config.get(:env) == :test, do: Ecto.Adapters.SQL.Sandbox.checkin(Pleroma.Repo)
	:ignore
	end

	def load_and_update_env do
	if Pleroma.Config.get([:instance, :dynamic_configuration]) and
	Ecto.Adapters.SQL.table_exists?(Pleroma.Repo, "config") do
	for_restart =
	Pleroma.Repo.all(Config)
	\|> Enum.map(&update_env(&1))

	# We need to restart applications for loaded settings take effect
	for_restart
	\|> Enum.reject(&(&1 in [:pleroma, :ok]))
	\|> Enum.each(fn app ->
	Application.stop(app)
	:ok = Application.start(app)
	end)
	end
	end

	defp update_env(setting) do
	try do
	key =
	if String.starts_with?(setting.key, "Pleroma.") do
	"Elixir." <> setting.key
	else
	String.trim_leading(setting.key, ":")
	end

	group = String.to_existing_atom(setting.group)

	Application.put_env(
	group,
	String.to_existing_atom(key),
	Config.from_binary(setting.value)
	)

	group
	rescue
	e ->
	require Logger

	Logger.warn(
	"updating env causes error, key: #{inspect(setting.key)}, error: #{inspect(e)}"
	)
	end
	end
	end