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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Config.TransferTask do
use Task
alias Pleroma.Config
alias Pleroma.ConfigDB
alias Pleroma.Repo
require Logger
@type env() :: :test | :benchmark | :dev | :prod
@reboot_time_keys [
{:pleroma, :hackney_pools},
{:pleroma, :chat},
{:pleroma, Oban},
{:pleroma, :rate_limit},
{:pleroma, :markup},
{:pleroma, :streamer},
{:pleroma, :pools},
{:pleroma, :connections_pool}
]
@reboot_time_subkeys [
{:pleroma, Pleroma.Captcha, [:seconds_valid]},
{:pleroma, Pleroma.Upload, [:proxy_remote]},
{:pleroma, :instance, [:upload_limit]},
{:pleroma, :gopher, [:enabled]}
]
def start_link(restart_pleroma? \\ true) do
load_and_update_env([], restart_pleroma?)
if Config.get(:env) == :test, do: Ecto.Adapters.SQL.Sandbox.checkin(Repo)
:ignore
end
@spec load_and_update_env([ConfigDB.t()], boolean()) :: :ok
def load_and_update_env(deleted_settings \\ [], restart_pleroma? \\ true) do
with {_, true} <- {:configurable, Config.get(:configurable_from_database)} do
# We need to restart applications for loaded settings take effect
{logger, other} =
(Repo.all(ConfigDB) ++ deleted_settings)
|> Enum.map(&merge_with_default/1)
|> Enum.split_with(fn {group, _, _, _} -> group in [:logger, :quack] end)
logger
|> Enum.sort()
|> Enum.each(&configure/1)
started_applications = Application.started_applications()
# TODO: some problem with prometheus after restart!
reject = [nil, :prometheus, :postgrex]
reject =
if restart_pleroma? do
reject
else
[:pleroma | reject]
end
other
|> Enum.map(&update/1)
|> Enum.uniq()
|> Enum.reject(&(&1 in reject))
|> maybe_set_pleroma_last()
|> Enum.each(&restart(started_applications, &1, Config.get(:env)))
:ok
else
{:configurable, false} -> Restarter.Pleroma.rebooted()
end
end
defp maybe_set_pleroma_last(apps) do
# to be ensured that pleroma will be restarted last
if :pleroma in apps do
apps
|> List.delete(:pleroma)
|> List.insert_at(-1, :pleroma)
else
Restarter.Pleroma.rebooted()
apps
end
end
defp merge_with_default(%{group: group, key: key, value: value} = setting) do
default = Config.Holder.default_config(group, key)
merged =
cond do
Ecto.get_meta(setting, :state) == :deleted -> default
can_be_merged?(default, value) -> ConfigDB.merge_group(group, key, default, value)
true -> value
end
{group, key, value, merged}
end
# change logger configuration in runtime, without restart
defp configure({:quack, key, _, merged}) do
Logger.configure_backend(Quack.Logger, [{key, merged}])
:ok = update_env(:quack, key, merged)
end
defp configure({_, :backends, _, merged}) do
# removing current backends
Enum.each(Application.get_env(:logger, :backends), &Logger.remove_backend/1)
Enum.each(merged, &Logger.add_backend/1)
:ok = update_env(:logger, :backends, merged)
end
defp configure({_, key, _, merged}) when key in [:console, :ex_syslogger] do
merged =
if key == :console do
put_in(merged[:format], merged[:format] <> "\n")
else
merged
end
backend =
if key == :ex_syslogger,
do: {ExSyslogger, :ex_syslogger},
else: key
Logger.configure_backend(backend, merged)
:ok = update_env(:logger, key, merged)
end
defp configure({_, key, _, merged}) do
Logger.configure([{key, merged}])
:ok = update_env(:logger, key, merged)
end
defp update({group, key, value, merged}) do
try do
:ok = update_env(group, key, merged)
if group != :pleroma or pleroma_need_restart?(group, key, value), do: group
rescue
error ->
error_msg =
"updating env causes error, group: #{inspect(group)}, key: #{inspect(key)}, value: #{
inspect(value)
} error: #{inspect(error)}"
Logger.warn(error_msg)
nil
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)
@spec pleroma_need_restart?(atom(), atom(), any()) :: boolean()
def pleroma_need_restart?(group, key, value) do
group_and_key_need_reboot?(group, key) or group_and_subkey_need_reboot?(group, key, value)
end
defp group_and_key_need_reboot?(group, key) do
Enum.any?(@reboot_time_keys, fn {g, k} -> g == group and k == key end)
end
defp group_and_subkey_need_reboot?(group, key, value) do
Keyword.keyword?(value) and
Enum.any?(@reboot_time_subkeys, fn {g, k, subkeys} ->
g == group and k == key and
Enum.any?(Keyword.keys(value), &(&1 in subkeys))
end)
end
defp restart(_, :pleroma, env), do: Restarter.Pleroma.restart_after_boot(env)
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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