# Pleroma: A lightweight social networking server # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.ConfigDB do use Ecto.Schema import Ecto.Changeset import Ecto.Query, only: [select: 3] import Pleroma.Web.Gettext alias __MODULE__ alias Pleroma.Repo @type t :: %__MODULE__{} @full_subkey_update [ {:pleroma, :assets, :mascots}, {:pleroma, :emoji, :groups}, {:pleroma, :workers, :retries}, {:pleroma, :mrf_subchain, :match_actor}, {:pleroma, :mrf_keyword, :replace} ] schema "config" do field(:key, Pleroma.EctoType.Config.Atom) field(:group, Pleroma.EctoType.Config.Atom) field(:value, Pleroma.EctoType.Config.BinaryValue) field(:db, {:array, :string}, virtual: true, default: []) timestamps() end @spec get_all_as_keyword() :: keyword() def get_all_as_keyword do ConfigDB |> select([c], {c.group, c.key, c.value}) |> Repo.all() |> Enum.reduce([], fn {group, key, value}, acc -> Keyword.update(acc, group, [{key, value}], &Keyword.merge(&1, [{key, value}])) end) end @spec get_by_params(map()) :: ConfigDB.t() | nil def get_by_params(params), do: Repo.get_by(ConfigDB, params) @spec changeset(ConfigDB.t(), map()) :: Changeset.t() def changeset(config, params \\ %{}) do config |> cast(params, [:key, :group, :value]) |> validate_required([:key, :group, :value]) |> unique_constraint(:key, name: :config_group_key_index) end defp create(params) do %ConfigDB{} |> changeset(params) |> Repo.insert() end defp update(%ConfigDB{} = config, %{value: value}) do config |> changeset(%{value: value}) |> Repo.update() end @spec get_db_keys(keyword(), any()) :: [String.t()] def get_db_keys(value, key) do keys = if Keyword.keyword?(value) do Keyword.keys(value) else [key] end Enum.map(keys, &to_json_types(&1)) end @spec merge_group(atom(), atom(), keyword(), keyword()) :: keyword() def merge_group(group, key, old_value, new_value) do new_keys = to_mapset(new_value) intersect_keys = old_value |> to_mapset() |> MapSet.intersection(new_keys) |> MapSet.to_list() merged_value = ConfigDB.merge(old_value, new_value) @full_subkey_update |> Enum.map(fn {g, k, subkey} when g == group and k == key -> if subkey in intersect_keys, do: subkey, else: [] _ -> [] end) |> List.flatten() |> Enum.reduce(merged_value, &Keyword.put(&2, &1, new_value[&1])) end defp to_mapset(keyword) do keyword |> Keyword.keys() |> MapSet.new() end @spec sub_key_full_update?(atom(), atom(), [Keyword.key()]) :: boolean() def sub_key_full_update?(group, key, subkeys) do Enum.any?(@full_subkey_update, fn {g, k, subkey} -> g == group and k == key and subkey in subkeys end) end @spec merge(keyword(), keyword()) :: keyword() def merge(config1, config2) when is_list(config1) and is_list(config2) do Keyword.merge(config1, config2, fn _, app1, app2 -> if Keyword.keyword?(app1) and Keyword.keyword?(app2) do Keyword.merge(app1, app2, &deep_merge/3) else app2 end end) end defp deep_merge(_key, value1, value2) do if Keyword.keyword?(value1) and Keyword.keyword?(value2) do Keyword.merge(value1, value2, &deep_merge/3) else value2 end end @spec update_or_create(map()) :: {:ok, ConfigDB.t()} | {:error, Changeset.t()} def update_or_create(params) do params = Map.put(params, :value, to_elixir_types(params[:value])) search_opts = Map.take(params, [:group, :key]) with %ConfigDB{} = config <- ConfigDB.get_by_params(search_opts), {_, true, config} <- {:partial_update, can_be_partially_updated?(config), config}, {_, true, config} <- {:can_be_merged, is_list(params[:value]) and is_list(config.value), config} do new_value = merge_group(config.group, config.key, config.value, params[:value]) update(config, %{value: new_value}) else {reason, false, config} when reason in [:partial_update, :can_be_merged] -> update(config, params) nil -> create(params) end end defp can_be_partially_updated?(%ConfigDB{} = config), do: not only_full_update?(config) defp only_full_update?(%ConfigDB{group: group, key: key}) do full_key_update = [ {:pleroma, :ecto_repos}, {:quack, :meta}, {:mime, :types}, {:cors_plug, [:max_age, :methods, :expose, :headers]}, {:swarm, :node_blacklist}, {:logger, :backends} ] Enum.any?(full_key_update, fn {s_group, s_key} -> group == s_group and ((is_list(s_key) and key in s_key) or key == s_key) end) end @spec delete(ConfigDB.t() | map()) :: {:ok, ConfigDB.t()} | {:error, Changeset.t()} def delete(%ConfigDB{} = config), do: Repo.delete(config) def delete(params) do search_opts = Map.delete(params, :subkeys) with %ConfigDB{} = config <- ConfigDB.get_by_params(search_opts), {config, sub_keys} when is_list(sub_keys) <- {config, params[:subkeys]}, keys <- Enum.map(sub_keys, &string_to_elixir_types(&1)), {_, config, new_value} when new_value != [] <- {:partial_remove, config, Keyword.drop(config.value, keys)} do update(config, %{value: new_value}) else {:partial_remove, config, []} -> Repo.delete(config) {config, nil} -> Repo.delete(config) nil -> err = dgettext("errors", "Config with params %{params} not found", params: inspect(params)) {:error, err} end end @spec to_json_types(term()) :: map() | list() | boolean() | String.t() def to_json_types(entity) when is_list(entity) do Enum.map(entity, &to_json_types/1) end def to_json_types(%Regex{} = entity), do: inspect(entity) def to_json_types(entity) when is_map(entity) do Map.new(entity, fn {k, v} -> {to_json_types(k), to_json_types(v)} end) end def to_json_types({:args, args}) when is_list(args) do arguments = Enum.map(args, fn arg when is_tuple(arg) -> inspect(arg) arg -> to_json_types(arg) end) %{"tuple" => [":args", arguments]} end def to_json_types({:proxy_url, {type, :localhost, port}}) do %{"tuple" => [":proxy_url", %{"tuple" => [to_json_types(type), "localhost", port]}]} end def to_json_types({:proxy_url, {type, host, port}}) when is_tuple(host) do ip = host |> :inet_parse.ntoa() |> to_string() %{ "tuple" => [ ":proxy_url", %{"tuple" => [to_json_types(type), ip, port]} ] } end def to_json_types({:proxy_url, {type, host, port}}) do %{ "tuple" => [ ":proxy_url", %{"tuple" => [to_json_types(type), to_string(host), port]} ] } end def to_json_types({:partial_chain, entity}), do: %{"tuple" => [":partial_chain", inspect(entity)]} def to_json_types(entity) when is_tuple(entity) do value = entity |> Tuple.to_list() |> to_json_types() %{"tuple" => value} end def to_json_types(entity) when is_binary(entity), do: entity def to_json_types(entity) when is_boolean(entity) or is_number(entity) or is_nil(entity) do entity end def to_json_types(entity) when entity in [:"tlsv1.1", :"tlsv1.2", :"tlsv1.3"] do ":#{entity}" end def to_json_types(entity) when is_atom(entity), do: inspect(entity) @spec to_elixir_types(boolean() | String.t() | map() | list()) :: term() def to_elixir_types(%{"tuple" => [":args", args]}) when is_list(args) do arguments = Enum.map(args, fn arg -> if String.contains?(arg, ["{", "}"]) do {elem, []} = Code.eval_string(arg) elem else to_elixir_types(arg) end end) {:args, arguments} end def to_elixir_types(%{"tuple" => [":proxy_url", %{"tuple" => [type, host, port]}]}) do {:proxy_url, {string_to_elixir_types(type), parse_host(host), port}} end def to_elixir_types(%{"tuple" => [":partial_chain", entity]}) do {partial_chain, []} = entity |> String.replace(~r/[^\w|^{:,[|^,|^[|^\]^}|^\/|^\.|^"]^\s/, "") |> Code.eval_string() {:partial_chain, partial_chain} end def to_elixir_types(%{"tuple" => entity}) do Enum.reduce(entity, {}, &Tuple.append(&2, to_elixir_types(&1))) end def to_elixir_types(entity) when is_map(entity) do Map.new(entity, fn {k, v} -> {to_elixir_types(k), to_elixir_types(v)} end) end def to_elixir_types(entity) when is_list(entity) do Enum.map(entity, &to_elixir_types/1) end def to_elixir_types(entity) when is_binary(entity) do entity |> String.trim() |> string_to_elixir_types() end def to_elixir_types(entity), do: entity @spec string_to_elixir_types(String.t()) :: atom() | Regex.t() | module() | String.t() | no_return() def string_to_elixir_types("~r" <> _pattern = regex) do pattern = ~r/^~r(?'delimiter'[\/|"'([{<]{1})(?'pattern'.+)[\/|"')\]}>]{1}(?'modifier'[uismxfU]*)/u delimiters = ["/", "|", "\"", "'", {"(", ")"}, {"[", "]"}, {"{", "}"}, {"<", ">"}] with %{"modifier" => modifier, "pattern" => pattern, "delimiter" => regex_delimiter} <- Regex.named_captures(pattern, regex), {:ok, {leading, closing}} <- find_valid_delimiter(delimiters, pattern, regex_delimiter), {result, _} <- Code.eval_string("~r#{leading}#{pattern}#{closing}#{modifier}") do result end end def string_to_elixir_types(":" <> atom), do: String.to_atom(atom) def string_to_elixir_types(value) do if module_name?(value) do String.to_existing_atom("Elixir." <> value) else value end end defp parse_host("localhost"), do: :localhost defp parse_host(host) do charlist = to_charlist(host) case :inet.parse_address(charlist) do {:error, :einval} -> charlist {:ok, ip} -> ip end end defp find_valid_delimiter([], _string, _) do raise(ArgumentError, message: "valid delimiter for Regex expression not found") end defp find_valid_delimiter([{leading, closing} = delimiter | others], pattern, regex_delimiter) when is_tuple(delimiter) do if String.contains?(pattern, closing) do find_valid_delimiter(others, pattern, regex_delimiter) else {:ok, {leading, closing}} end end defp find_valid_delimiter([delimiter | others], pattern, regex_delimiter) do if String.contains?(pattern, delimiter) do find_valid_delimiter(others, pattern, regex_delimiter) else {:ok, {delimiter, delimiter}} end end @spec module_name?(String.t()) :: boolean() def module_name?(string) do Regex.match?(~r/^(Pleroma|Phoenix|Tesla|Quack|Ueberauth|Swoosh)\./, string) or string in ["Oban", "Ueberauth", "ExSyslogger"] end end