mobilizon/lib/web/email/event.ex

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Elixir
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defmodule Mobilizon.Web.Email.Event do
@moduledoc """
Handles emails sent about events.
"""
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use Bamboo.Phoenix, view: Mobilizon.Web.EmailView
import Bamboo.Phoenix
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import Mobilizon.Web.Gettext
alias Mobilizon.Actors.Actor
alias Mobilizon.Events
alias Mobilizon.Events.{Event, Participant}
alias Mobilizon.Storage.Repo
alias Mobilizon.Users.User
alias Mobilizon.Web.Email
alias Mobilizon.Web.Gettext, as: GettextBackend
@important_changes [:title, :begins_on, :ends_on, :status, :physical_address]
@spec event_updated(String.t(), Actor.t(), Event.t(), Event.t(), MapSet.t(), String.t()) ::
Bamboo.Email.t()
def event_updated(
email,
%Actor{} = actor,
%Event{} = old_event,
%Event{} = event,
changes,
locale \\ "en"
) do
GettextBackend.put_locale(locale)
subject =
gettext(
"Event %{title} has been updated",
title: old_event.title
)
Email.base_email(to: {Actor.display_name(actor), 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(
{%Participant{} = _participant, %Actor{} = actor,
%User{locale: locale, email: email} = _user},
%Event{} = old_event,
%Event{} = event,
diff
) do
email
|> Email.Event.event_updated(actor, old_event, event, diff, locale)
|> Email.Mailer.deliver_later()
end
defp send_notification_for_event_update_to_participant(
{%Participant{metadata: %{email: email}} = _participant, %Actor{} = actor, nil},
%Event{} = old_event,
%Event{} = event,
diff
)
when not is_nil(email) do
locale = Gettext.get_locale()
email
|> Email.Event.event_updated(actor, old_event, event, diff, locale)
|> Email.Mailer.deliver_later()
end
end