defmodule Mobilizon.Service.Notifications.Scheduler do @moduledoc """ Allows to insert jobs """ alias Mobilizon.{Actors, Users} alias Mobilizon.Actors.Actor alias Mobilizon.Events.{Event, Participant} alias Mobilizon.Service.Workers.Notification alias Mobilizon.Users.{Setting, User} require Logger def before_event_notification(%Participant{ id: participant_id, event: %Event{begins_on: begins_on}, actor: %Actor{user_id: user_id} }) when not is_nil(user_id) do case Users.get_setting(user_id) do %Setting{notification_before_event: true} -> Notification.enqueue(:before_event_notification, %{participant_id: participant_id}, scheduled_at: DateTime.add(begins_on, -3600, :second) ) _ -> {:ok, nil} end end def before_event_notification(_), do: {:ok, nil} def on_day_notification(%Participant{ event: %Event{begins_on: begins_on}, actor: %Actor{user_id: user_id} }) when not is_nil(user_id) do case Users.get_setting(user_id) do %Setting{notification_on_day: true, timezone: timezone} -> %DateTime{hour: hour} = begins_on_shifted = shift_zone(begins_on, timezone) Logger.debug("Participation event start at #{inspect(begins_on_shifted)} (user timezone)") send_date = cond do DateTime.compare(begins_on, DateTime.utc_now()) == :lt -> nil hour > 8 -> # If the event is after 8 o'clock %{begins_on_shifted | hour: 8, minute: 0, second: 0, microsecond: {0, 0}} true -> # If the event is before 8 o'clock, we send the notification the day before, # unless this is already passed begins_on_shifted |> DateTime.add(-24 * 3_600) |> (&%{&1 | hour: 8, minute: 0, second: 0, microsecond: {0, 0}}).() end Logger.debug( "Participation notification should be sent at #{inspect(send_date)} (user timezone)" ) if is_nil(send_date) or DateTime.compare(DateTime.utc_now(), send_date) == :gt do {:ok, "Too late to send same day notifications"} else Notification.enqueue(:on_day_notification, %{user_id: user_id}, scheduled_at: send_date) end _ -> {:ok, "User has disable on day notifications"} end end def on_day_notification(_), do: {:ok, nil} def weekly_notification(%Participant{ event: %Event{begins_on: begins_on}, actor: %Actor{user_id: user_id} }) when not is_nil(user_id) do %User{settings: settings, locale: locale} = Users.get_user_with_settings!(user_id) case settings do %Setting{notification_each_week: true, timezone: timezone} -> %DateTime{} = begins_on_shifted = shift_zone(begins_on, timezone) Logger.debug( "Participation event start at #{inspect(begins_on_shifted)} (user timezone is #{ timezone })" ) notification_date = if Date.compare(begins_on, DateTime.utc_now()) == :gt do notification_day = calculate_first_day_of_week(DateTime.to_date(begins_on), locale) {:ok, %NaiveDateTime{} = notification_date} = notification_day |> NaiveDateTime.new(~T[08:00:00]) # This is the datetime when the notification should be sent {:ok, %DateTime{} = notification_date} = DateTime.from_naive(notification_date, timezone) if Date.compare(notification_date, DateTime.utc_now()) == :gt do notification_date else nil end else nil end Logger.debug( "Participation notification should be sent at #{inspect(notification_date)} (user timezone)" ) if is_nil(notification_date) do {:ok, "Too late to send weekly notifications"} else Notification.enqueue(:weekly_notification, %{user_id: user_id}, scheduled_at: notification_date ) end _ -> {:ok, "User has disabled weekly notifications"} end end def weekly_notification(_), do: {:ok, nil} def pending_participation_notification(%Event{ id: event_id, organizer_actor_id: organizer_actor_id, local: true }) do with %Actor{user_id: user_id} when not is_nil(user_id) <- Actors.get_actor(organizer_actor_id), %User{ locale: locale, settings: %Setting{ notification_pending_participation: notification_pending_participation, timezone: timezone } } <- Users.get_user_with_settings!(user_id) do send_at = case notification_pending_participation do :none -> nil :direct -> :direct :one_day -> calculate_next_day_notification(Date.utc_today(), timezone, locale) :one_hour -> DateTime.utc_now() |> DateTime.shift_zone!(timezone) |> (&%{&1 | minute: 0, second: 0, microsecond: {0, 0}}).() end params = %{ user_id: user_id, event_id: event_id } cond do # Sending directly send_at == :direct -> Notification.enqueue(:pending_participation_notification, params) # Not sending is_nil(send_at) -> {:ok, nil} # Sending to calculated time true -> Notification.enqueue(:pending_participation_notification, params, scheduled_at: send_at) end else _ -> {:ok, nil} end end def pending_participation_notification(_), do: {:ok, nil} defp shift_zone(datetime, timezone) do case DateTime.shift_zone(datetime, timezone) do {:ok, shift_datetime} -> shift_datetime {:error, _} -> datetime end end defp calculate_first_day_of_week(%Date{} = date, locale) do day_number = Date.day_of_week(date) first_day_number = Cldr.Calendar.first_day_for_locale(locale) if day_number == first_day_number, do: date, else: calculate_first_day_of_week(Date.add(date, -1), locale) end defp calculate_next_day_notification(%Date{} = day, timezone, locale) do send_at = date_to_datetime(day, ~T[18:00:00], timezone) if DateTime.compare(send_at, DateTime.utc_now()) == :lt do day |> Date.add(1) |> calculate_first_day_of_week(locale) |> date_to_datetime(~T[18:00:00], timezone) else send_at end end defp date_to_datetime(%Date{} = day, time, timezone) do {:ok, datetime} = NaiveDateTime.new(day, time) {:ok, datetime} = DateTime.from_naive(datetime, timezone) datetime end end