Rename MobilizonWeb to Mobilizon.Web

lib/web/email/event.ex

@@ -0,0 +1,85 @@
+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
+
+  @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
+    Mobilizon.Web.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