mobilizon/lib/service/notifications/scheduler.ex

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Elixir
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defmodule Mobilizon.Service.Notifications.Scheduler do
@moduledoc """
Allows to insert jobs
"""
alias Mobilizon.Actors.Actor
alias Mobilizon.Events.{Event, Participant}
alias Mobilizon.Service.Workers.Notification
alias Mobilizon.Users
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
begins_on < DateTime.utc_now() ->
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 DateTime.utc_now() > send_date 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 =
unless begins_on < DateTime.utc_now() 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)
unless notification_date < DateTime.utc_now() 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}
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
end