1 files changed, 152 insertions, 0 deletions
diff --git a/lib/pleroma/web/admin_api/controllers/config_controller.ex b/lib/pleroma/web/admin_api/controllers/config_controller.ex
new file mode 100644
index 000000000..d6e2019bc
--- /dev/null
+++ b/lib/pleroma/web/admin_api/controllers/config_controller.ex
@@ -0,0 +1,152 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.ConfigController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Config
+  alias Pleroma.ConfigDB
+  alias Pleroma.Plugs.OAuthScopesPlug
+
+  @descriptions Pleroma.Docs.JSON.compile()
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+  plug(OAuthScopesPlug, %{scopes: ["write"], admin: true} when action == :update)
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["read"], admin: true}
+    when action in [:show, :descriptions]
+  )
+
+  action_fallback(Pleroma.Web.AdminAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.ConfigOperation
+
+  def descriptions(conn, _params) do
+    descriptions = Enum.filter(@descriptions, &whitelisted_config?/1)
+
+    json(conn, descriptions)
+  end
+
+  def show(conn, %{only_db: true}) do
+    with :ok <- configurable_from_database() do
+      configs = Pleroma.Repo.all(ConfigDB)
+      render(conn, "index.json", %{configs: configs})
+    end
+  end
+
+  def show(conn, _params) do
+    with :ok <- configurable_from_database() do
+      configs = ConfigDB.get_all_as_keyword()
+
+      merged =
+        Config.Holder.default_config()
+        |> ConfigDB.merge(configs)
+        |> Enum.map(fn {group, values} ->
+          Enum.map(values, fn {key, value} ->
+            db =
+              if configs[group][key] do
+                ConfigDB.get_db_keys(configs[group][key], key)
+              end
+
+            db_value = configs[group][key]
+
+            merged_value =
+              if not is_nil(db_value) and Keyword.keyword?(db_value) and
+                   ConfigDB.sub_key_full_update?(group, key, Keyword.keys(db_value)) do
+                ConfigDB.merge_group(group, key, value, db_value)
+              else
+                value
+              end
+
+            %{
+              group: ConfigDB.convert(group),
+              key: ConfigDB.convert(key),
+              value: ConfigDB.convert(merged_value)
+            }
+            |> Pleroma.Maps.put_if_present(:db, db)
+          end)
+        end)
+        |> List.flatten()
+
+      json(conn, %{configs: merged, need_reboot: Restarter.Pleroma.need_reboot?()})
+    end
+  end
+
+  def update(%{body_params: %{configs: configs}} = conn, _) do
+    with :ok <- configurable_from_database() do
+      results =
+        configs
+        |> Enum.filter(&whitelisted_config?/1)
+        |> Enum.map(fn
+          %{group: group, key: key, delete: true} = params ->
+            ConfigDB.delete(%{group: group, key: key, subkeys: params[:subkeys]})
+
+          %{group: group, key: key, value: value} ->
+            ConfigDB.update_or_create(%{group: group, key: key, value: value})
+        end)
+        |> Enum.reject(fn {result, _} -> result == :error end)
+
+      {deleted, updated} =
+        results
+        |> Enum.map(fn {:ok, config} ->
+          Map.put(config, :db, ConfigDB.get_db_keys(config))
+        end)
+        |> Enum.split_with(fn config ->
+          Ecto.get_meta(config, :state) == :deleted
+        end)
+
+      Config.TransferTask.load_and_update_env(deleted, false)
+
+      if not Restarter.Pleroma.need_reboot?() do
+        changed_reboot_settings? =
+          (updated ++ deleted)
+          |> Enum.any?(fn config ->
+            group = ConfigDB.from_string(config.group)
+            key = ConfigDB.from_string(config.key)
+            value = ConfigDB.from_binary(config.value)
+            Config.TransferTask.pleroma_need_restart?(group, key, value)
+          end)
+
+        if changed_reboot_settings?, do: Restarter.Pleroma.need_reboot()
+      end
+
+      render(conn, "index.json", %{
+        configs: updated,
+        need_reboot: Restarter.Pleroma.need_reboot?()
+      })
+    end
+  end
+
+  defp configurable_from_database do
+    if Config.get(:configurable_from_database) do
+      :ok
+    else
+      {:error, "To use this endpoint you need to enable configuration from database."}
+    end
+  end
+
+  defp whitelisted_config?(group, key) do
+    if whitelisted_configs = Config.get(:database_config_whitelist) do
+      Enum.any?(whitelisted_configs, fn
+        {whitelisted_group} ->
+          group == inspect(whitelisted_group)
+
+        {whitelisted_group, whitelisted_key} ->
+          group == inspect(whitelisted_group) && key == inspect(whitelisted_key)
+      end)
+    else
+      true
+    end
+  end
+
+  defp whitelisted_config?(%{group: group, key: key}) do
+    whitelisted_config?(group, key)
+  end
+
+  defp whitelisted_config?(%{group: group} = config) do
+    whitelisted_config?(group, config[:key])
+  end
+end