defmodule Mobilizon.Web.Email.Event do @moduledoc """ Handles emails sent about events. """ use Bamboo.Phoenix, view: Mobilizon.Web.EmailView import Bamboo.Phoenix import Mobilizon.Web.Gettext alias Mobilizon.Actors.Actor alias Mobilizon.Events alias Mobilizon.Events.Event alias Mobilizon.Storage.Repo alias Mobilizon.Users.User alias Mobilizon.Web.{Email, Gettext} @important_changes [:title, :begins_on, :ends_on, :status] @spec event_updated(User.t(), Actor.t(), Event.t(), Event.t(), list(), String.t()) :: Bamboo.Email.t() def event_updated( %User{} = user, %Actor{} = actor, %Event{} = old_event, %Event{} = event, changes, locale \\ "en" ) do Gettext.put_locale(locale) subject = gettext( "Event %{title} has been updated", title: old_event.title ) Email.base_email(to: {Actor.display_name(actor), user.email}, subject: subject) |> assign(:locale, locale) |> assign(:event, event) |> assign(:old_event, old_event) |> assign(:changes, changes) |> assign(:subject, subject) |> render(:event_updated) end def calculate_event_diff_and_send_notifications( %Event{} = old_event, %Event{id: event_id} = event, changes ) do important = MapSet.new(@important_changes) diff = changes |> Map.keys() |> MapSet.new() |> MapSet.intersection(important) if MapSet.size(diff) > 0 do Repo.transaction(fn -> event_id |> Events.list_local_emails_user_participants_for_event_query() |> Repo.stream() |> Enum.to_list() |> Enum.each( &send_notification_for_event_update_to_participant(&1, old_event, event, diff) ) end) end end defp send_notification_for_event_update_to_participant( {%Actor{} = actor, %User{locale: locale} = user}, %Event{} = old_event, %Event{} = event, diff ) do user |> Email.Event.event_updated(actor, old_event, event, diff, locale) |> Email.Mailer.deliver_later() end end