philomena/lib/philomena_web/plugs/load_poll_plug.ex
2020-01-10 23:20:19 -05:00

33 lines
907 B
Elixir

defmodule PhilomenaWeb.LoadPollPlug do
alias Philomena.Polls.Poll
alias Philomena.Repo
import Plug.Conn, only: [assign: 3]
import Canada.Can, only: [can?: 3]
import Ecto.Query
def init(opts),
do: opts
def call(%{assigns: %{topic: topic}} = conn, opts) do
show_hidden = Keyword.get(opts, :show_hidden, false)
Poll
|> where(topic_id: ^topic.id)
|> Repo.one()
|> maybe_hide_poll(conn, show_hidden)
end
defp maybe_hide_poll(nil, conn, _show_hidden),
do: PhilomenaWeb.NotFoundPlug.call(conn)
defp maybe_hide_poll(%{hidden_from_users: false} = poll, conn, _show_hidden),
do: assign(conn, :poll, poll)
defp maybe_hide_poll(poll, %{assigns: %{current_user: user}} = conn, show_hidden) do
case show_hidden or can?(user, :show, poll) do
true -> assign(conn, :poll, poll)
false -> PhilomenaWeb.NotAuthorizedPlug.call(conn)
end
end
end