// PUT api/Reservation/5
// Cancel Reservation
public HttpResponseMessage PutReservation(string token, Reservation reservation)
{
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
bool valid = db.LibraryUsers.Where(lb => lb.L_id == reservation.L_id && lb.L_token.Equals(token)).Any();
object result = new object { };
if (valid)
{
if (reservation.R_getBookDate == null)
{
reservation.R_finishDatetime = DateTime.Now;
reservation.R_isActivated = false;
reservation.R_getBookDate = null;
db.Entry(reservation).State = EntityState.Modified;
try
{
db.SaveChanges();
}
catch (DbUpdateConcurrencyException ex)
{
response = Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
}
result = new { Result = true, Message = "The Reservation is Cancelled" };
}
else
{
result = new { Result = false, Message = "The reservation cannot be cancelled" };
}
}
else
{
result = new { Result = false, Message = "Not a valid user" };
response = Request.CreateErrorResponse(HttpStatusCode.BadRequest, result.ToString());
}
response.Content = new StringContent(JsonConvert.SerializeObject(result));
return response;
}
// POST api/Reservation
public HttpResponseMessage PostReservation(Reservation reservation)
{
object result = null;
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, result);
if (ModelState.IsValid)
{
/*
* 1. check the Book is on the shelf
* 2. check the borrower is already borrowed this book
* 3. check is reservation of this book is already made
* 4. the result count < Util.Reservation_AmountForEachBook
* 5. check reservation limit of the user
* 6. create a reservation record
*/
// 1.
Boolean bookOnTheShlef = (from b in db.Books
where b.B_id == reservation.B_id &
b.B_status != Util.BookStatus_ONTHESHELF
select b).Any();
if (bookOnTheShlef)
{
// 2.
Boolean isBorrowerOfThisBook = (from br in db.Borrowing_record
where br.B_id == reservation.B_id &
br.L_id == reservation.L_id &
br.BR_returnedDate == null
select br).Any();
if (!isBorrowerOfThisBook)
{
// 3.
Boolean isReservated = (from r in db.Reservations
where r.B_id == reservation.B_id &
r.L_id == reservation.L_id &
r.R_isActivated == true &
r.R_finishDatetime == null
select r).Any();
if (!isReservated)
{
// 4.
int reservationCountOfBook = (from r in db.Reservations
where r.B_id == reservation.B_id &
r.R_isActivated == true &
r.R_finishDatetime == null
select r).Count();
if (reservationCountOfBook < Util.Reservation_AmountForEachBook)
{
int reservationCountOfUser = (from r in db.Reservations
where r.L_id == reservation.L_id &
r.R_isActivated == true &
r.R_finishDatetime == null
select r).Count();
// 5.
if (reservationCountOfUser < db.Rules.Select(rule => rule.Rule_reservationLimit).Single())
{
// 6.
reservation.R_datetime = DateTime.Now;
reservation.R_isActivated = true;
db.Reservations.Add(reservation);
db.SaveChanges();
result = new { Status = "True" };
response = Request.CreateResponse(HttpStatusCode.Created);
}
else
{
result = new { Status = "False", Message = "You reach the reservation limit" };
}
}
else
{
result = new { Status = "False", Message = "Reach the reservation limit of the book" };
}
}
else
{
result = new { Status = "False", Message = "You have already reserved this book" };
}
}
else
{
result = new { Status = "False", Message = "You have already borrowed this book" };
}
}
else
{
result = new { Status = "False", Message = "The book cannot be reserved" };
}
response.Content = new StringContent(JsonConvert.SerializeObject(result));
return response;
}
else
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
}
