/// <summary>
/// allows the user to change the date of the booking
/// </summary>
/// <param name="bookingId">id of booking</param>
/// <returns>ChangeDate page</returns>
public ActionResult ChangeDate(int?bookingId)
{
//populate the model
ChangeDateViewModel model = new ChangeDateViewModel()
{
BookingId = (int)bookingId,
DepartureDate = DateTime.Now,
ErrorMessage = ""
};
//load ChangeDate page
return(View(model));
}
public async Task <IActionResult> ChangeDate(ChangeDateViewModel model)
{
//if date is in the past, reload page
if (model.DepartureDate < DateTime.Now || model.DepartureDate == null)
{
model.ErrorMessage = "Date not allowed";
return(View(model));
}
//get users currrent booking from the database
var userBooking = await _context.Bookings
.Where(b => b.BookingId == model.BookingId)
.Include(b => b.Brochure)
.FirstOrDefaultAsync();
//get all the bookings from the database where it shares the same brochure
var bookings = _context.Bookings
.Where(b => b.BrochureId == userBooking.BrochureId && b.Status.Equals("Completed"))
.Include(b => b.Brochure);
List <DateTime> unavailableDates = new List <DateTime>();
//store the dates for every booking
foreach (var oldBooking in bookings)
{
//store departure date
unavailableDates.Add(oldBooking.DepartureDate);
//store the dates included in the duration after departure
var duration = oldBooking.Brochure.Duration;
var daysBefore = duration - 1;
while (duration > 0)
{
unavailableDates.Add(oldBooking.DepartureDate.AddDays(duration));
duration--;
}
//store the dates included in the lead upto the departure so bookings dont overlap
while (daysBefore > 0)
{
unavailableDates.Add(oldBooking.DepartureDate.AddDays(-daysBefore));
daysBefore--;
}
}
//if booking is already taken
if (unavailableDates.Contains(model.DepartureDate))
{
model.ErrorMessage = "Date is already booked";
return(View(model));
}
//update booking in database
userBooking.DepartureDate = model.DepartureDate;
_context.Bookings.Update(userBooking);
await _context.SaveChangesAsync();
//redirect to AddPeople action
return(RedirectToAction(nameof(BookingController.Confirmation), new { bookingId = model.BookingId }));
}