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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.ConfigDB
alias Pleroma.Repo
require Logger
def start_link(_) do
load_and_update_env()
if Pleroma.Config.get(:env) == :test, do: Ecto.Adapters.SQL.Sandbox.checkin(Repo)
:ignore
end
@spec load_and_update_env([ConfigDB.t()]) :: :ok | false
def load_and_update_env(deleted \\ []) do
with true <- Pleroma.Config.get(:configurable_from_database),
true <- Ecto.Adapters.SQL.table_exists?(Repo, "config"),
started_applications <- Application.started_applications() do
# We need to restart applications for loaded settings take effect
in_db = Repo.all(ConfigDB)
with_deleted = in_db ++ deleted
with_deleted
|> Enum.map(&merge_and_update(&1))
|> Enum.uniq()
# TODO: some problem with prometheus after restart!
|> Enum.reject(&(&1 in [:pleroma, nil, :prometheus]))
|> Enum.each(&restart(started_applications, &1))
:ok
end
end
defp merge_and_update(setting) do
try do
key = ConfigDB.from_string(setting.key)
group = ConfigDB.from_string(setting.group)
default = Pleroma.Config.Holder.config(group, key)
merged_value = merge_value(setting, default, group, key)
:ok = update_env(group, key, merged_value)
if group != :logger do
group
else
# change logger configuration in runtime, without restart
if Keyword.keyword?(merged_value) and
key not in [:compile_time_application, :backends, :compile_time_purge_matching] do
Logger.configure_backend(key, merged_value)
else
Logger.configure([{key, merged_value}])
end
nil
end
rescue
error ->
error_msg =
"updating env causes error, group: " <>
inspect(setting.group) <>
" key: " <>
inspect(setting.key) <>
" value: " <>
inspect(ConfigDB.from_binary(setting.value)) <> " error: " <> inspect(error)
Logger.warn(error_msg)
nil
end
end
defp merge_value(%{__meta__: %{state: :deleted}}, default, _group, _key), do: default
defp merge_value(setting, default, group, key) do
value = ConfigDB.from_binary(setting.value)
if can_be_merged?(default, value) do
ConfigDB.merge_group(group, key, default, value)
else
value
end
end
defp update_env(group, key, nil), do: Application.delete_env(group, key)
defp update_env(group, key, value), do: Application.put_env(group, key, value)
defp restart(started_applications, app) do
with {^app, _, _} <- List.keyfind(started_applications, app, 0),
:ok <- Application.stop(app) do
:ok = Application.start(app)
else
nil ->
Logger.warn("#{app} is not started.")
error ->
error
|> inspect()
|> Logger.warn()
end
end
defp can_be_merged?(val1, val2) when is_list(val1) and is_list(val2) do
Keyword.keyword?(val1) and Keyword.keyword?(val2)
end
defp can_be_merged?(_val1, _val2), do: false
end
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