philomena/lib/philomena_web/plugs/advert_plug.ex

39 lines
905 B
Elixir

defmodule PhilomenaWeb.AdvertPlug do
alias Philomena.Adverts
alias Plug.Conn
def init([]), do: []
def call(conn, _opts) do
user = conn.assigns.current_user
image = conn.assigns[:image]
show_ads? = show_ads?(user)
maybe_assign_ad(conn, image, show_ads?)
end
defp maybe_assign_ad(conn, image, show_ads?)
defp maybe_assign_ad(conn, nil, true),
do: Conn.assign(conn, :advert, record_impression(Adverts.random_live()))
defp maybe_assign_ad(conn, image, true),
do: Conn.assign(conn, :advert, record_impression(Adverts.random_live(image)))
defp maybe_assign_ad(conn, _image, _false),
do: Conn.assign(conn, :advert, nil)
defp show_ads?(%{hide_advertisements: hide}),
do: !hide
defp show_ads?(_user),
do: true
defp record_impression(nil), do: nil
defp record_impression(advert) do
Adverts.record_impression(advert)
advert
end
end