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config_db.ex
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 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, from: 2]
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_all_by_group(atom() | String.t()) :: [t()]
def get_all_by_group(group) do
from(c in ConfigDB, where: c.group == ^group) |> Repo.all()
end
@spec get_by_group_and_key(atom() | String.t(), atom() | String.t()) :: t() | nil
def get_by_group_and_key(group, key) do
get_by_params(%{group: group, key: key})
end
@spec get_by_params(map()) :: ConfigDB.t() | nil
def get_by_params(%{group: _, key: _} = 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},
{: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|Ueberauth|Swoosh)\./, string) or
string in ["Oban", "Ueberauth", "ExSyslogger", "ConcurrentLimiter"]
end
end

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