git.squeep.com Git - akkoma/blob - lib/pleroma/config_db.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.ConfigDB do
   6   use Ecto.Schema
   7
   8   import Ecto.Changeset
   9   import Ecto.Query, only: [select: 3, from: 2]
  10   import Pleroma.Web.Gettext
  11
  12   alias __MODULE__
  13   alias Pleroma.Repo
  14
  15   @type t :: %__MODULE__{}
  16
  17   @full_subkey_update [
  18     {:pleroma, :assets, :mascots},
  19     {:pleroma, :emoji, :groups},
  20     {:pleroma, :workers, :retries},
  21     {:pleroma, :mrf_subchain, :match_actor},
  22     {:pleroma, :mrf_keyword, :replace}
  23   ]
  24
  25   schema "config" do
  26     field(:key, Pleroma.EctoType.Config.Atom)
  27     field(:group, Pleroma.EctoType.Config.Atom)
  28     field(:value, Pleroma.EctoType.Config.BinaryValue)
  29     field(:db, {:array, :string}, virtual: true, default: [])
  30
  31     timestamps()
  32   end
  33
  34   @spec get_all_as_keyword() :: keyword()
  35   def get_all_as_keyword do
  36     ConfigDB
  37     |> select([c], {c.group, c.key, c.value})
  38     |> Repo.all()
  39     |> Enum.reduce([], fn {group, key, value}, acc ->
  40       Keyword.update(acc, group, [{key, value}], &Keyword.merge(&1, [{key, value}]))
  41     end)
  42   end
  43
  44   @spec get_all_by_group(atom() | String.t()) :: [t()]
  45   def get_all_by_group(group) do
  46     from(c in ConfigDB, where: c.group == ^group) |> Repo.all()
  47   end
  48
  49   @spec get_by_group_and_key(atom() | String.t(), atom() | String.t()) :: t() | nil
  50   def get_by_group_and_key(group, key) do
  51     get_by_params(%{group: group, key: key})
  52   end
  53
  54   @spec get_by_params(map()) :: ConfigDB.t() | nil
  55   def get_by_params(%{group: _, key: _} = params), do: Repo.get_by(ConfigDB, params)
  56
  57   @spec changeset(ConfigDB.t(), map()) :: Changeset.t()
  58   def changeset(config, params \\ %{}) do
  59     config
  60     |> cast(params, [:key, :group, :value])
  61     |> validate_required([:key, :group, :value])
  62     |> unique_constraint(:key, name: :config_group_key_index)
  63   end
  64
  65   defp create(params) do
  66     %ConfigDB{}
  67     |> changeset(params)
  68     |> Repo.insert()
  69   end
  70
  71   defp update(%ConfigDB{} = config, %{value: value}) do
  72     config
  73     |> changeset(%{value: value})
  74     |> Repo.update()
  75   end
  76
  77   @spec get_db_keys(keyword(), any()) :: [String.t()]
  78   def get_db_keys(value, key) do
  79     keys =
  80       if Keyword.keyword?(value) do
  81         Keyword.keys(value)
  82       else
  83         [key]
  84       end
  85
  86     Enum.map(keys, &to_json_types(&1))
  87   end
  88
  89   @spec merge_group(atom(), atom(), keyword(), keyword()) :: keyword()
  90   def merge_group(group, key, old_value, new_value) do
  91     new_keys = to_mapset(new_value)
  92
  93     intersect_keys = old_value |> to_mapset() |> MapSet.intersection(new_keys) |> MapSet.to_list()
  94
  95     merged_value = ConfigDB.merge(old_value, new_value)
  96
  97     @full_subkey_update
  98     |> Enum.map(fn
  99       {g, k, subkey} when g == group and k == key ->
 100         if subkey in intersect_keys, do: subkey, else: []
 101
 102       _ ->
 103         []
 104     end)
 105     |> List.flatten()
 106     |> Enum.reduce(merged_value, &Keyword.put(&2, &1, new_value[&1]))
 107   end
 108
 109   defp to_mapset(keyword) do
 110     keyword
 111     |> Keyword.keys()
 112     |> MapSet.new()
 113   end
 114
 115   @spec sub_key_full_update?(atom(), atom(), [Keyword.key()]) :: boolean()
 116   def sub_key_full_update?(group, key, subkeys) do
 117     Enum.any?(@full_subkey_update, fn {g, k, subkey} ->
 118       g == group and k == key and subkey in subkeys
 119     end)
 120   end
 121
 122   @spec merge(keyword(), keyword()) :: keyword()
 123   def merge(config1, config2) when is_list(config1) and is_list(config2) do
 124     Keyword.merge(config1, config2, fn _, app1, app2 ->
 125       if Keyword.keyword?(app1) and Keyword.keyword?(app2) do
 126         Keyword.merge(app1, app2, &deep_merge/3)
 127       else
 128         app2
 129       end
 130     end)
 131   end
 132
 133   defp deep_merge(_key, value1, value2) do
 134     if Keyword.keyword?(value1) and Keyword.keyword?(value2) do
 135       Keyword.merge(value1, value2, &deep_merge/3)
 136     else
 137       value2
 138     end
 139   end
 140
 141   @spec update_or_create(map()) :: {:ok, ConfigDB.t()} | {:error, Changeset.t()}
 142   def update_or_create(params) do
 143     params = Map.put(params, :value, to_elixir_types(params[:value]))
 144     search_opts = Map.take(params, [:group, :key])
 145
 146     with %ConfigDB{} = config <- ConfigDB.get_by_params(search_opts),
 147          {_, true, config} <- {:partial_update, can_be_partially_updated?(config), config},
 148          {_, true, config} <-
 149            {:can_be_merged, is_list(params[:value]) and is_list(config.value), config} do
 150       new_value = merge_group(config.group, config.key, config.value, params[:value])
 151       update(config, %{value: new_value})
 152     else
 153       {reason, false, config} when reason in [:partial_update, :can_be_merged] ->
 154         update(config, params)
 155
 156       nil ->
 157         create(params)
 158     end
 159   end
 160
 161   defp can_be_partially_updated?(%ConfigDB{} = config), do: not only_full_update?(config)
 162
 163   defp only_full_update?(%ConfigDB{group: group, key: key}) do
 164     full_key_update = [
 165       {:pleroma, :ecto_repos},
 166       {:mime, :types},
 167       {:cors_plug, [:max_age, :methods, :expose, :headers]},
 168       {:swarm, :node_blacklist},
 169       {:logger, :backends}
 170     ]
 171
 172     Enum.any?(full_key_update, fn
 173       {s_group, s_key} ->
 174         group == s_group and ((is_list(s_key) and key in s_key) or key == s_key)
 175     end)
 176   end
 177
 178   @spec delete(ConfigDB.t() | map()) :: {:ok, ConfigDB.t()} | {:error, Changeset.t()}
 179   def delete(%ConfigDB{} = config), do: Repo.delete(config)
 180
 181   def delete(params) do
 182     search_opts = Map.delete(params, :subkeys)
 183
 184     with %ConfigDB{} = config <- ConfigDB.get_by_params(search_opts),
 185          {config, sub_keys} when is_list(sub_keys) <- {config, params[:subkeys]},
 186          keys <- Enum.map(sub_keys, &string_to_elixir_types(&1)),
 187          {_, config, new_value} when new_value != [] <-
 188            {:partial_remove, config, Keyword.drop(config.value, keys)} do
 189       update(config, %{value: new_value})
 190     else
 191       {:partial_remove, config, []} ->
 192         Repo.delete(config)
 193
 194       {config, nil} ->
 195         Repo.delete(config)
 196
 197       nil ->
 198         err =
 199           dgettext("errors", "Config with params %{params} not found", params: inspect(params))
 200
 201         {:error, err}
 202     end
 203   end
 204
 205   @spec to_json_types(term()) :: map() | list() | boolean() | String.t()
 206   def to_json_types(entity) when is_list(entity) do
 207     Enum.map(entity, &to_json_types/1)
 208   end
 209
 210   def to_json_types(%Regex{} = entity), do: inspect(entity)
 211
 212   def to_json_types(entity) when is_map(entity) do
 213     Map.new(entity, fn {k, v} -> {to_json_types(k), to_json_types(v)} end)
 214   end
 215
 216   def to_json_types({:args, args}) when is_list(args) do
 217     arguments =
 218       Enum.map(args, fn
 219         arg when is_tuple(arg) -> inspect(arg)
 220         arg -> to_json_types(arg)
 221       end)
 222
 223     %{"tuple" => [":args", arguments]}
 224   end
 225
 226   def to_json_types({:proxy_url, {type, :localhost, port}}) do
 227     %{"tuple" => [":proxy_url", %{"tuple" => [to_json_types(type), "localhost", port]}]}
 228   end
 229
 230   def to_json_types({:proxy_url, {type, host, port}}) when is_tuple(host) do
 231     ip =
 232       host
 233       |> :inet_parse.ntoa()
 234       |> to_string()
 235
 236     %{
 237       "tuple" => [
 238         ":proxy_url",
 239         %{"tuple" => [to_json_types(type), ip, port]}
 240       ]
 241     }
 242   end
 243
 244   def to_json_types({:proxy_url, {type, host, port}}) do
 245     %{
 246       "tuple" => [
 247         ":proxy_url",
 248         %{"tuple" => [to_json_types(type), to_string(host), port]}
 249       ]
 250     }
 251   end
 252
 253   def to_json_types({:partial_chain, entity}),
 254     do: %{"tuple" => [":partial_chain", inspect(entity)]}
 255
 256   def to_json_types(entity) when is_tuple(entity) do
 257     value =
 258       entity
 259       |> Tuple.to_list()
 260       |> to_json_types()
 261
 262     %{"tuple" => value}
 263   end
 264
 265   def to_json_types(entity) when is_binary(entity), do: entity
 266
 267   def to_json_types(entity) when is_boolean(entity) or is_number(entity) or is_nil(entity) do
 268     entity
 269   end
 270
 271   def to_json_types(entity) when entity in [:"tlsv1.1", :"tlsv1.2", :"tlsv1.3"] do
 272     ":#{entity}"
 273   end
 274
 275   def to_json_types(entity) when is_atom(entity), do: inspect(entity)
 276
 277   @spec to_elixir_types(boolean() | String.t() | map() | list()) :: term()
 278   def to_elixir_types(%{"tuple" => [":args", args]}) when is_list(args) do
 279     arguments =
 280       Enum.map(args, fn arg ->
 281         if String.contains?(arg, ["{", "}"]) do
 282           {elem, []} = Code.eval_string(arg)
 283           elem
 284         else
 285           to_elixir_types(arg)
 286         end
 287       end)
 288
 289     {:args, arguments}
 290   end
 291
 292   def to_elixir_types(%{"tuple" => [":proxy_url", %{"tuple" => [type, host, port]}]}) do
 293     {:proxy_url, {string_to_elixir_types(type), parse_host(host), port}}
 294   end
 295
 296   def to_elixir_types(%{"tuple" => [":partial_chain", entity]}) do
 297     {partial_chain, []} =
 298       entity
 299       |> String.replace(~r/[^\w|^{:,[|^,|^[|^\]^}|^\/|^\.|^"]^\s/, "")
 300       |> Code.eval_string()
 301
 302     {:partial_chain, partial_chain}
 303   end
 304
 305   def to_elixir_types(%{"tuple" => entity}) do
 306     Enum.reduce(entity, {}, &Tuple.append(&2, to_elixir_types(&1)))
 307   end
 308
 309   def to_elixir_types(entity) when is_map(entity) do
 310     Map.new(entity, fn {k, v} -> {to_elixir_types(k), to_elixir_types(v)} end)
 311   end
 312
 313   def to_elixir_types(entity) when is_list(entity) do
 314     Enum.map(entity, &to_elixir_types/1)
 315   end
 316
 317   def to_elixir_types(entity) when is_binary(entity) do
 318     entity
 319     |> String.trim()
 320     |> string_to_elixir_types()
 321   end
 322
 323   def to_elixir_types(entity), do: entity
 324
 325   @spec string_to_elixir_types(String.t()) ::
 326           atom() | Regex.t() | module() | String.t() | no_return()
 327   def string_to_elixir_types("~r" <> _pattern = regex) do
 328     pattern =
 329       ~r/^~r(?'delimiter'[\/|"'([{<]{1})(?'pattern'.+)[\/|"')\]}>]{1}(?'modifier'[uismxfU]*)/u
 330
 331     delimiters = ["/", "|", "\"", "'", {"(", ")"}, {"[", "]"}, {"{", "}"}, {"<", ">"}]
 332
 333     with %{"modifier" => modifier, "pattern" => pattern, "delimiter" => regex_delimiter} <-
 334            Regex.named_captures(pattern, regex),
 335          {:ok, {leading, closing}} <- find_valid_delimiter(delimiters, pattern, regex_delimiter),
 336          {result, _} <- Code.eval_string("~r#{leading}#{pattern}#{closing}#{modifier}") do
 337       result
 338     end
 339   end
 340
 341   def string_to_elixir_types(":" <> atom), do: String.to_atom(atom)
 342
 343   def string_to_elixir_types(value) do
 344     if module_name?(value) do
 345       try do
 346         String.to_existing_atom("Elixir." <> value)
 347       rescue
 348         ArgumentError -> :invalid_atom
 349       end
 350     else
 351       value
 352     end
 353   end
 354
 355   defp parse_host("localhost"), do: :localhost
 356
 357   defp parse_host(host) do
 358     charlist = to_charlist(host)
 359
 360     case :inet.parse_address(charlist) do
 361       {:error, :einval} ->
 362         charlist
 363
 364       {:ok, ip} ->
 365         ip
 366     end
 367   end
 368
 369   defp find_valid_delimiter([], _string, _) do
 370     raise(ArgumentError, message: "valid delimiter for Regex expression not found")
 371   end
 372
 373   defp find_valid_delimiter([{leading, closing} = delimiter | others], pattern, regex_delimiter)
 374        when is_tuple(delimiter) do
 375     if String.contains?(pattern, closing) do
 376       find_valid_delimiter(others, pattern, regex_delimiter)
 377     else
 378       {:ok, {leading, closing}}
 379     end
 380   end
 381
 382   defp find_valid_delimiter([delimiter | others], pattern, regex_delimiter) do
 383     if String.contains?(pattern, delimiter) do
 384       find_valid_delimiter(others, pattern, regex_delimiter)
 385     else
 386       {:ok, {delimiter, delimiter}}
 387     end
 388   end
 389
 390   @spec module_name?(String.t()) :: boolean()
 391   def module_name?(string) do
 392     Regex.match?(~r/^(Pleroma|Phoenix|Tesla|Quack|Ueberauth|Swoosh)\./, string) or
 393       string in ["Oban", "Ueberauth", "ExSyslogger", "ConcurrentLimiter"]
 394   end
 395 end