akkoma/lib/pleroma/web/admin_api/config.ex
2020-01-10 15:52:01 +03:00

304 lines
9 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.AdminAPI.Config do
use Ecto.Schema
import Ecto.Changeset
import Pleroma.Web.Gettext
alias __MODULE__
alias Pleroma.Repo
@type t :: %__MODULE__{}
schema "config" do
field(:key, :string)
field(:group, :string)
field(:value, :binary)
timestamps()
end
@spec get_by_params(map()) :: Config.t() | nil
def get_by_params(params), do: Repo.get_by(Config, params)
@spec changeset(Config.t(), map()) :: Changeset.t()
def changeset(config, params \\ %{}) do
params = Map.put(params, :value, transform(params[:value]))
config
|> cast(params, [:key, :group, :value])
|> validate_required([:key, :group, :value])
|> unique_constraint(:key, name: :config_group_key_index)
end
@spec create(map()) :: {:ok, Config.t()} | {:error, Changeset.t()}
def create(params) do
%Config{}
|> changeset(params)
|> Repo.insert()
end
@spec update(Config.t(), map()) :: {:ok, Config} | {:error, Changeset.t()}
def update(%Config{} = config, %{value: value}) do
config
|> changeset(%{value: value})
|> Repo.update()
end
@full_key_update [
{:pleroma, :ecto_repos},
{:quack, :meta},
{:mime, :types},
{:cors_plug, [:max_age, :methods, :expose, :headers]},
{:auto_linker, :opts},
{:swarm, :node_blacklist}
]
defp only_full_update?(%Config{} = config) do
config_group = Config.from_string(config.group)
config_key = Config.from_string(config.key)
Enum.any?(@full_key_update, fn
{group, key} when is_list(key) ->
config_group == group and config_key in key
{group, key} ->
config_group == group and config_key == key
end)
end
defp can_be_partially_updated?(%Config{} = config), do: not only_full_update?(config)
@spec update_or_create(map()) :: {:ok, Config.t()} | {:error, Changeset.t()}
def update_or_create(params) do
search_opts = Map.take(params, [:group, :key])
with %Config{} = config <- Config.get_by_params(search_opts),
{:partial_update, true, config} <-
{:partial_update, can_be_partially_updated?(config), config},
old_value <- from_binary(config.value),
transformed_value <- do_transform(params[:value]),
{:can_be_merged, true, config} <- {:can_be_merged, is_list(transformed_value), config},
new_value <- Keyword.merge(old_value, transformed_value) do
Config.update(config, %{value: new_value, transformed?: true})
else
{reason, false, config} when reason in [:partial_update, :can_be_merged] ->
Config.update(config, params)
nil ->
Config.create(params)
end
end
@spec delete(map()) :: {:ok, Config.t()} | {:error, Changeset.t()} | {:ok, nil}
def delete(params) do
search_opts = Map.delete(params, :subkeys)
with %Config{} = config <- Config.get_by_params(search_opts),
{config, sub_keys} when is_list(sub_keys) <- {config, params[:subkeys]},
old_value <- from_binary(config.value),
keys <- Enum.map(sub_keys, &do_transform_string(&1)),
new_value <- Keyword.drop(old_value, keys) do
Config.update(config, %{value: new_value})
else
{config, nil} ->
Repo.delete(config)
{:ok, nil}
nil ->
err =
dgettext("errors", "Config with params %{params} not found", params: inspect(params))
{:error, err}
end
end
@spec from_binary(binary()) :: term()
def from_binary(binary), do: :erlang.binary_to_term(binary)
@spec from_binary_with_convert(binary()) :: any()
def from_binary_with_convert(binary) do
binary
|> from_binary()
|> do_convert()
end
@spec from_string(String.t()) :: atom() | no_return()
def from_string(":" <> entity), do: String.to_existing_atom(entity)
def from_string(entity) when is_binary(entity) do
if is_module_name?(entity) do
String.to_existing_atom("Elixir.#{entity}")
else
entity
end
end
defp do_convert(entity) when is_list(entity) do
for v <- entity, into: [], do: do_convert(v)
end
defp do_convert(%Regex{} = entity), do: inspect(entity)
defp do_convert(entity) when is_map(entity) do
for {k, v} <- entity, into: %{}, do: {do_convert(k), do_convert(v)}
end
defp do_convert({:proxy_url, {type, :localhost, port}}) do
%{"tuple" => [":proxy_url", %{"tuple" => [do_convert(type), "localhost", port]}]}
end
defp do_convert({:proxy_url, {type, host, port}}) when is_tuple(host) do
ip =
host
|> :inet_parse.ntoa()
|> to_string()
%{
"tuple" => [
":proxy_url",
%{"tuple" => [do_convert(type), ip, port]}
]
}
end
defp do_convert({:proxy_url, {type, host, port}}) do
%{
"tuple" => [
":proxy_url",
%{"tuple" => [do_convert(type), to_string(host), port]}
]
}
end
defp do_convert({:dispatch, [entity]}), do: %{"tuple" => [":dispatch", [inspect(entity)]]}
# TODO: will become useless after removing hackney
defp do_convert({:partial_chain, entity}), do: %{"tuple" => [":partial_chain", inspect(entity)]}
defp do_convert(entity) when is_tuple(entity),
do: %{"tuple" => do_convert(Tuple.to_list(entity))}
defp do_convert(entity) when is_boolean(entity) or is_number(entity) or is_nil(entity),
do: entity
defp do_convert(entity) when is_atom(entity), do: inspect(entity)
defp do_convert(entity) when is_binary(entity), do: entity
@spec transform(any()) :: binary() | no_return()
def transform(entity) when is_binary(entity) or is_map(entity) or is_list(entity) do
entity
|> do_transform()
|> to_binary()
end
def transform(entity), do: to_binary(entity)
@spec to_binary(any()) :: binary()
def to_binary(entity), do: :erlang.term_to_binary(entity)
defp do_transform(%Regex{} = entity), do: entity
defp do_transform(%{"tuple" => [":proxy_url", %{"tuple" => [type, host, port]}]}) do
{:proxy_url, {do_transform_string(type), parse_host(host), port}}
end
defp do_transform(%{"tuple" => [":dispatch", [entity]]}) do
{dispatch_settings, []} = do_eval(entity)
{:dispatch, [dispatch_settings]}
end
# TODO: will become useless after removing hackney
defp do_transform(%{"tuple" => [":partial_chain", entity]}) do
{partial_chain, []} = do_eval(entity)
{:partial_chain, partial_chain}
end
defp do_transform(%{"tuple" => entity}) do
Enum.reduce(entity, {}, fn val, acc -> Tuple.append(acc, do_transform(val)) end)
end
defp do_transform(entity) when is_map(entity) do
for {k, v} <- entity, into: %{}, do: {do_transform(k), do_transform(v)}
end
defp do_transform(entity) when is_list(entity) do
for v <- entity, into: [], do: do_transform(v)
end
defp do_transform(entity) when is_binary(entity) do
entity
|> String.trim()
|> do_transform_string()
end
defp do_transform(entity), do: entity
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
@delimiters ["/", "|", "\"", "'", {"(", ")"}, {"[", "]"}, {"{", "}"}, {"<", ">"}]
defp find_valid_delimiter([], _string, _),
do: raise(ArgumentError, message: "valid delimiter for Regex expression not found")
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
@regex_parts ~r/^~r(?'delimiter'[\/|"'([{<]{1})(?'pattern'.+)[\/|"')\]}>]{1}(?'modifier'[uismxfU]*)/u
defp do_transform_string("~r" <> _pattern = regex) do
with %{"modifier" => modifier, "pattern" => pattern, "delimiter" => regex_delimiter} <-
Regex.named_captures(@regex_parts, regex),
{:ok, {leading, closing}} <- find_valid_delimiter(@delimiters, pattern, regex_delimiter),
{result, _} <- Code.eval_string("~r#{leading}#{pattern}#{closing}#{modifier}") do
result
end
end
defp do_transform_string(":" <> atom), do: String.to_atom(atom)
defp do_transform_string(value) do
if is_module_name?(value) do
String.to_existing_atom("Elixir." <> value)
else
value
end
end
@spec is_module_name?(String.t()) :: boolean()
def is_module_name?(string) do
Regex.match?(~r/^(Pleroma|Phoenix|Tesla)\./, string) or string in ["Oban", "Ueberauth"]
end
defp do_eval(entity) do
cleaned_string = String.replace(entity, ~r/[^\w|^{:,[|^,|^[|^\]^}|^\/|^\.|^"]^\s/, "")
Code.eval_string(cleaned_string)
end
end