/// <summary>
/// Tries to add given reservation to db, after validating it
/// </summary>
public ValidationResult Add(NewReservationItem newReservation)
{
if (newReservation == null)
{
throw new ArgumentNullException(nameof(newReservation));
}
var result = ValidateNewReservation(newReservation);
if ((result & ValidationResult.Ok) == ValidationResult.Ok)
{
var reservation = new Reservation
{
From = newReservation.From,
To = newReservation.To,
Lecturer = queryAllLecturers.Execute().Single(p => p.Id == newReservation.LecturerId),
Hall = queryAllLectureHalls.Execute().Single(p => p.Number == newReservation.LectureHallNumber),
};
queryAdd.Execute(reservation);
}
return(result);
}
/// <summary>
/// Lists all lecture halls that exist in db
/// </summary>
public IEnumerable <LectureHallItem> All()
{
return(Mapper.Map <IEnumerable <LectureHallItem> >(_query.Execute().ToList()));
}
/// <summary>
/// Checks whether given reservation can be added.
/// Performs logical and business validation.
/// </summary>
public ValidationResult ValidateNewReservation(NewReservationItem newReservation)
{
if (newReservation == null)
{
throw new ArgumentNullException("newReservation");
}
var result = ValidationResult.Default;
if (newReservation.From.DayOfWeek != newReservation.To.DayOfWeek)
{
result |= ValidationResult.MoreThanOneDay;
}
if (newReservation.From > newReservation.To)
{
result |= ValidationResult.ToBeforeFrom;
}
if ((newReservation.From.Hour < 8) || (newReservation.From.Hour > 18) || (newReservation.From.Hour == 18 && newReservation.From.Minute != 0) ||
(newReservation.To.Hour < 8) || (newReservation.To.Hour > 18) || (newReservation.To.Hour == 18 && newReservation.To.Minute != 0))
{
result |= ValidationResult.OutsideWorkingHours;
}
var secondsBetweenToAndFrom = (newReservation.To - newReservation.From).TotalSeconds;
if (secondsBetweenToAndFrom > 10800) //10800 is 3 hours in seconds
{
result |= ValidationResult.TooLong;
}
var existingReservations = _queryAll.Execute();
var listOfPossibleOverlappingReservations = existingReservations.Select(x => x).Where(x => x.Hall.Number == newReservation.LectureHallNumber);
foreach (Reservation res in listOfPossibleOverlappingReservations.ToList())
{
if (res.From > newReservation.From && res.To <= newReservation.To)
{
result |= ValidationResult.Conflicting;
break;
}
if (res.From < newReservation.From && res.To >= newReservation.To)
{
result |= ValidationResult.Conflicting;
break;
}
if (res.From == newReservation.From && res.To == newReservation.To)
{
result |= ValidationResult.Conflicting;
break;
}
if (res.From >= newReservation.From && res.To < newReservation.To)
{
result |= ValidationResult.Conflicting;
break;
}
if (res.From <= newReservation.From && res.To > newReservation.To)
{
result |= ValidationResult.Conflicting;
break;
}
}
var lectureHalls = _queryAllLectureHalls.Execute();
if (!lectureHalls.Any(x => x.Number == newReservation.LectureHallNumber))
{
result |= ValidationResult.HallDoesNotExist;
}
var lecturers = _queryAllLecturers.Execute();
if (!lecturers.Any(x => x.Id == newReservation.LecturerId))
{
result |= ValidationResult.LecturerDoesNotExist;
}
// TODO
// Note that for reservation dates, we take into account only date and an hour, minutes and seconds don't matter.
return(result);
}
/// <summary>
/// Checks whether given reservation can be added.
/// Performs logical and business validation.
/// </summary>
public ValidationResult ValidateNewReservation(NewReservationItem newReservation)
{
if (newReservation == null)
{
throw new ArgumentNullException("newReservation");
}
var result = ValidationResult.Default;
// TODO
// Implement following validation rules:
// (idea is to check all and give customer full information, not to stop after first fail - therefore enum with [Flags] Attribute is returned)
// - newReservation.From must be the same day as newReservation.To. If it isn't, set result |= ValidationResult.MoreThanOneDay
if (newReservation.From.Day != newReservation.To.Day)
{
result |= ValidationResult.MoreThanOneDay;
}
// - newReservation.From obviously can't be >= newReservation.To. If it is, set result |= ValidationResult.ToBeforeFrom
if (DateTime.Compare(newReservation.From, newReservation.To) >= 0)
{
result |= ValidationResult.ToBeforeFrom;
}
// - whole newReservation must be included inside working hours: 8-18 (it can't start before 8 and must finish at 18 at the very latest).
// If it's not met, set result |= ValidationResult.OutsideWorkingHours
if (newReservation.From.TimeOfDay.Hours < 8 ||
newReservation.To.TimeOfDay.Hours > 18)
{
result |= ValidationResult.OutsideWorkingHours;
}
// - newReservation must last 3 hours at most. If it's not, set result |= ValidationResult.TooLong
if ((newReservation.To.TimeOfDay.Hours - newReservation.From.TimeOfDay.Hours) > 3)
{
result |= ValidationResult.TooLong;
}
// - newReservation obviously cannot be in conflict (same hallNumber and overlapping hours) with any existing reservation.
// If it is, set result |= ValidationResult.Conflicting. Use _queryAll to get all extisting reservations
var reservationToCheck = _queryAll.Execute()
.Where(r => r.Hall.Number == newReservation.LectureHallNumber &&
(r.From.TimeOfDay >= newReservation.From.TimeOfDay &&
r.To.TimeOfDay <= newReservation.To.TimeOfDay))
.FirstOrDefault();
if (reservationToCheck != null)
{
result |= ValidationResult.Conflicting;
}
// - check if newReservation.LectureHallNumber points at existing lecture hall. If it's not,
// set result |= ValidationResult.HallDoesNotExist. Use _queryAllLectureHalls to get all extisting lecture halls
var lectureHallsToCheck = _queryAllLectureHalls.Execute()
.Where(h => h.Number == newReservation.LectureHallNumber)
.FirstOrDefault();
if (lectureHallsToCheck == null)
{
result |= ValidationResult.HallDoesNotExist;
}
// - check if newReservation.LecturerId points at existing lecturer. If it's not,
// set result |= ValidationResult.LecturerDoesNotExist. Use _queryAllLecturers to get all extisting lecturers
var lecturersTocheck = _queryAllLecturers.Execute()
.Where(l => l.Id == newReservation.LecturerId)
.FirstOrDefault();
if (lecturersTocheck == null)
{
result |= ValidationResult.LecturerDoesNotExist;
}
// Remember ! Check ALL validation rules and set result with appropriate enum flag described above.
// Note that for reservation dates, we take into account only date and an hour, minutes and seconds don't matter.
if (result == ValidationResult.Default)
{
return(ValidationResult.Ok);
}
return(result);
}
