# Pleroma: A lightweight social networking server # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.MastodonAPI.PollController do use Pleroma.Web, :controller import Pleroma.Web.ControllerHelper, only: [try_render: 3, json_response: 3] alias Pleroma.Activity alias Pleroma.Object alias Pleroma.Plugs.OAuthScopesPlug alias Pleroma.Web.ActivityPub.Visibility alias Pleroma.Web.CommonAPI action_fallback(Pleroma.Web.MastodonAPI.FallbackController) plug(Pleroma.Web.ApiSpec.CastAndValidate) plug( OAuthScopesPlug, %{scopes: ["read:statuses"], fallback: :proceed_unauthenticated} when action == :show ) plug(OAuthScopesPlug, %{scopes: ["write:statuses"]} when action == :vote) defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PollOperation @doc "GET /api/v1/polls/:id" def show(%{assigns: %{user: user}} = conn, %{id: id}) do with %Object{} = object <- Object.get_by_id_and_maybe_refetch(id, interval: 60), %Activity{} = activity <- Activity.get_create_by_object_ap_id(object.data["id"]), true <- Visibility.visible_for_user?(activity, user) do try_render(conn, "show.json", %{object: object, for: user}) else error when is_nil(error) or error == false -> render_error(conn, :not_found, "Record not found") end end @doc "POST /api/v1/polls/:id/votes" def vote(%{assigns: %{user: user}, body_params: %{choices: choices}} = conn, %{id: id}) do with %Object{data: %{"type" => "Question"}} = object <- Object.get_by_id(id), %Activity{} = activity <- Activity.get_create_by_object_ap_id(object.data["id"]), true <- Visibility.visible_for_user?(activity, user), {:ok, _activities, object} <- get_cached_vote_or_vote(user, object, choices) do try_render(conn, "show.json", %{object: object, for: user}) else nil -> render_error(conn, :not_found, "Record not found") false -> render_error(conn, :not_found, "Record not found") {:error, message} -> json_response(conn, :unprocessable_entity, %{error: message}) end end defp get_cached_vote_or_vote(user, object, choices) do idempotency_key = "polls:#{user.id}:#{object.data["id"]}" Cachex.fetch!(:idempotency_cache, idempotency_key, fn -> case CommonAPI.vote(user, object, choices) do {:error, _message} = res -> {:ignore, res} res -> {:commit, res} end end) end end