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poll_controller.ex
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poll_controller.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.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.Web.ActivityPub.Visibility
alias Pleroma.Web.CommonAPI
alias Pleroma.Web.Plugs.OAuthScopesPlug
action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
plug(Pleroma.Web.ApiSpec.CastAndValidate, replace_params: false)
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
@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
@doc "GET /api/v1/polls/:id"
def show(%{assigns: %{user: user}, private: %{open_api_spex: %{params: %{id: id}}}} = conn, _) 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},
private: %{open_api_spex: %{body_params: %{choices: choices}, params: %{id: id}}}
} = conn,
_
) 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(object, user, 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(object, user, choices) do
idempotency_key = "polls:#{user.id}:#{object.data["id"]}"
@cachex.fetch!(:idempotency_cache, idempotency_key, fn _ ->
case CommonAPI.vote(object, user, choices) do
{:error, _message} = res -> {:ignore, res}
res -> {:commit, res}
end
end)
end
end

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