feat(notify): Web Push subscriptions and email/push prefs.

Prefs in user.preferences; push_subscription table; VAPID send on
reminder/waitlist. Refs EventHub/EventHubBack#75

src/logic/logic_booking.erl

@@ -422,10 +422,15 @@ maybe_remind(#booking{id = Id, event_id = EventId, user_id = UserId} = Booking,
 send_reminder(UserId, Title, Start, CalId, EventId) ->
   Path = <<"/c/", CalId/binary, "/e/", EventId/binary>>,
   WhenText = format_when(Start),
-  case core_user:get_by_id(UserId) of
-    {ok, #user{email = Email}} when is_binary(Email), Email =/= <<>> ->
-      _ = logic_email:send_booking_reminder(Email, Title, Start, Path);
-    _ ->
+  case logic_notification_prefs:email_enabled(UserId) of
+    true ->
+      case core_user:get_by_id(UserId) of
+        {ok, #user{email = Email}} when is_binary(Email), Email =/= <<>> ->
+          _ = logic_email:send_booking_reminder(Email, Title, Start, Path);
+        _ ->
+          ok
+      end;
+    false ->
       ok
   end,
   _ = logic_notification:notify_event_reminder(UserId, #{
@@ -435,6 +440,12 @@ send_reminder(UserId, Title, Start, CalId, EventId) ->
     start_time => Start,
     when_text => WhenText
   }),
+  _ = logic_web_push:send(
+    UserId,
+    <<"Напоминание о записи"/utf8>>,
+    iolist_to_binary([<<"Скоро: «"/utf8>>, Title, <<"» — "/utf8>>, WhenText]),
+    Path
+  ),
   ok.
 
 format_when({{Y, Mo, D}, {H, Mi, _S}}) ->