private async Task RemindAboutMeetings()
{
var meetingsToRemind = context.Meetings.Where(m => m.DateFrom <= DateTime.Now.AddDays(1) && m.Accepted && !m.Reminded);
var userIds = meetingsToRemind.Select(m => new { m.UserId, m.School.OwnerId });
userIds.ToList().ForEach(ui =>
{
var meeting = meetingsToRemind.FirstOrDefault(m => m.UserId == ui.UserId && m.School.OwnerId == ui.OwnerId);
meeting.Remind();
notificationSystem.PushNotification(ui.UserId, StaticExpressions.MeetingRemind(meeting.School.Name, meeting.DateFrom.ToShortDateString())).Wait();
notificationSystem.PushNotification(ui.OwnerId, StaticExpressions.MeetingRemindForOwner(meeting.DateFrom.ToShortDateString())).Wait();
});
await context.SaveChangesAsync();
}