public bool isAvailableBetween(Teacher teacher, DateTime startDateTime, DateTime endDateTime) // a2
{
Participant_Service participant_Service = new Participant_Service();
Activity_Service activity_Service = new Activity_Service();
List <Participant> participants = participant_Service.getParticipansByUser(teacher);
foreach (Participant participant in participants)
{
Activity activity = activity_Service.getActivityById(participant.ActivityId); // a1
if (!(endDateTime < activity.ActivityStartDate || startDateTime > activity.ActivityEndDate))
{
return(false);
}
}
return(true);
}
