mobilizon/lib/web/email/event.ex

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Elixir
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2020-01-26 20:36:50 +00:00
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.{Setting, User}
alias Mobilizon.Web.Email
alias Mobilizon.Web.JsonLD.ObjectView
@important_changes [:title, :begins_on, :ends_on, :status, :physical_address]
@spec event_updated(
Participant.t(),
String.t(),
Actor.t(),
Event.t(),
Event.t(),
MapSet.t(),
String.t(),
String.t()
) ::
Bamboo.Email.t()
def event_updated(
email,
%Participant{} = participant,
%Actor{} = actor,
%Event{} = old_event,
%Event{} = event,
changes,
timezone,
locale
) do
Gettext.put_locale(locale)
subject =
gettext(
"Event %{title} has been updated",
title: old_event.title
)
json_ld =
"participation.json"
|> ObjectView.render(%{participant: %Participant{participant | event: event, actor: actor}})
|> Jason.encode!()
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)
|> assign(:timezone, timezone)
|> assign(:jsonLDMetadata, json_ld)
|> Email.add_event_attachment(event)
|> render(:event_updated)
end
@spec calculate_event_diff_and_send_notifications(Event.t(), Event.t(), map()) :: {:ok, :ok}
def calculate_event_diff_and_send_notifications(
%Event{} = old_event,
%Event{id: event_id} = event,
changes
) do
important = @important_changes |> Enum.map(&to_string/1) |> MapSet.new()
diff =
changes
|> Map.keys()
|> MapSet.new()
|> MapSet.intersection(important)
|> Enum.map(&String.to_existing_atom/1)
|> MapSet.new()
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)
else
{:ok, :ok}
end
end
@spec send_notification_for_event_update_to_participant(
{Participant.t(), Actor.t(), User.t() | nil, Setting.t() | nil},
Event.t(),
Event.t(),
MapSet.t()
) :: Bamboo.Email.t()
defp send_notification_for_event_update_to_participant(
{%Participant{} = participant, %Actor{} = actor,
%User{locale: locale, email: email} = _user, %Setting{timezone: timezone}},
%Event{} = old_event,
%Event{} = event,
diff
) do
do_send_notification_for_event_update_to_participant(
participant,
email,
actor,
old_event,
event,
diff,
timezone,
locale
)
end
defp send_notification_for_event_update_to_participant(
{%Participant{} = participant, %Actor{} = actor,
%User{locale: locale, email: email} = _user, nil},
%Event{} = old_event,
%Event{} = event,
diff
) do
do_send_notification_for_event_update_to_participant(
participant,
email,
actor,
old_event,
event,
diff,
"Etc/UTC",
locale
)
end
defp send_notification_for_event_update_to_participant(
{%Participant{metadata: %{email: email} = participant_metadata} = participant,
%Actor{} = actor, nil, nil},
%Event{} = old_event,
%Event{} = event,
diff
)
when not is_nil(email) do
locale = Gettext.get_locale()
do_send_notification_for_event_update_to_participant(
participant,
email,
actor,
old_event,
event,
diff,
Map.get(participant_metadata, :timezone, "Etc/UTC"),
locale
)
end
@spec do_send_notification_for_event_update_to_participant(
Participant.t(),
String.t(),
Actor.t(),
Event.t(),
Event.t(),
MapSet.t(),
String.t(),
String.t()
) :: Bamboo.Email.t()
defp do_send_notification_for_event_update_to_participant(
participant,
email,
actor,
old_event,
event,
diff,
timezone,
locale
) do
email
|> event_updated(participant, actor, old_event, event, diff, timezone, locale)
|> Email.Mailer.send_email_later()
end
end