Introduce group basic federation, event new page and notifications

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/service/workers/background.ex

@@ -1,6 +1,6 @@
 defmodule Mobilizon.Service.Workers.Background do
   @moduledoc """
-  Worker to build search results
+  Worker to perform various actions in the background
   """
 
   alias Mobilizon.Actors

lib/service/workers/helper.ex

@@ -10,7 +10,6 @@ defmodule Mobilizon.Service.Workers.Helper do
 
   alias Mobilizon.Config
   alias Mobilizon.Service.Workers.Helper
-  alias Mobilizon.Storage.Repo
 
   def worker_args(queue) do
     case Config.get([:workers, :retries, queue]) do
@@ -45,7 +44,7 @@ defmodule Mobilizon.Service.Workers.Helper do
 
         unquote(caller_module)
         |> apply(:new, [params, worker_args])
-        |> Repo.insert()
+        |> Oban.insert()
       end
     end
   end

lib/service/workers/notification.ex

@@ -0,0 +1,63 @@
+defmodule Mobilizon.Service.Workers.Notification do
+  @moduledoc """
+  Worker to send notifications
+  """
+
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Events
+  alias Mobilizon.Events.{Event, Participant}
+  alias Mobilizon.Storage.Page
+  alias Mobilizon.Users
+  alias Mobilizon.Users.{Setting, User}
+  alias Mobilizon.Web.Email.{Mailer, Notification}
+
+  use Mobilizon.Service.Workers.Helper, queue: "mailers"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "before_event_notification", "participant_id" => participant_id}, _job) do
+    with %Participant{actor: %Actor{user_id: user_id}, event: %Event{status: :confirmed}} =
+           participant <- Events.get_participant(participant_id),
+         %User{email: email, locale: locale, settings: %Setting{notification_before_event: true}} <-
+           Users.get_user_with_settings!(user_id) do
+      email
+      |> Notification.before_event_notification(participant, locale)
+      |> Mailer.deliver_later()
+
+      :ok
+    end
+  end
+
+  def perform(%{"op" => "on_day_notification", "user_id" => user_id}, _job) do
+    %User{locale: locale, settings: %Setting{timezone: timezone, notification_on_day: true}} =
+      user = Users.get_user_with_settings!(user_id)
+
+    now = DateTime.utc_now()
+    %DateTime{} = now_shifted = shift_zone(now, timezone)
+    start = %{now_shifted | hour: 8, minute: 0, second: 0, microsecond: {0, 0}}
+    tomorrow = DateTime.add(start, 3600 * 24)
+
+    with %Page{
+           elements: participations,
+           total: total
+         } <-
+           Events.list_participations_for_user(user_id, start, tomorrow, 1, 5),
+         true <-
+           Enum.all?(participations, fn participation ->
+             participation.event.status == :confirmed
+           end),
+         true <- total > 0 do
+      user
+      |> Notification.on_day_notification(participations, total, locale)
+      |> Mailer.deliver_later()
+
+      :ok
+    end
+  end
+
+  defp shift_zone(datetime, timezone) do
+    case DateTime.shift_zone(datetime, timezone) do
+      {:ok, shift_datetime} -> shift_datetime
+      {:error, _} -> datetime
+    end
+  end
+end