public async Task <IActionResult> CancelAppointing(string barcode)
{
if (ModelState.IsValid)
{
StudentInfo student = _lendingInfoDbContext.Students.Include(s => s.KeepingBooks).ThenInclude(k => k.Book).ThenInclude(b => b.Appointments)
.FirstOrDefault(s => s.UserName == User.Identity.Name);
if (student.AppointingBookBarCode == barcode)
{
student.AppointingBookBarCode = null;
AppointmentOrLending targetAppointment = student.KeepingBooks.FirstOrDefault(a => a.BookId == barcode);
student.KeepingBooks.Remove(targetAppointment);
Book targetBook = targetAppointment.Book;
targetBook.AppointedLatestTime = targetBook.Appointments.Any(a => a.AppointingDateTime.HasValue) ?
targetBook.Appointments.Max(a => a.AppointingDateTime) : null;
await _lendingInfoDbContext.SaveChangesAsync();
TempData["message"] = "取消成功";
}
}
return(RedirectToAction("PersonalInfo"));
}
public async Task <IActionResult> EditLendingInfo([Bind("BarCode,ISBN,BorrowTime,KeeperId,AppointedLatestTime,State")] Book book)
{
if (ModelState.IsValid)
{
if (book.BorrowTime > DateTime.Now)
{
ModelState.AddModelError("", "请检查外借时间");
return(View(book));
}
if (book.AppointedLatestTime.HasValue)
{
if (book.AppointedLatestTime < DateTime.Now)
{
ModelState.AddModelError("", "请检查预约时间");
return(View(book));
}
if (book.KeeperId == null)
{
ModelState.AddModelError("", "不存在该学生");
return(View(book));
}
}
StudentInfo student = await _lendingInfoDbContext.Students.Include(s => s.KeepingBooks).FirstOrDefaultAsync(s => s.UserName == book.KeeperId);
Book addedBook = _lendingInfoDbContext.Books
.Include(b => b.Keeper).ThenInclude(k => k.KeepingBooks)
.FirstOrDefault(b => b.BarCode == book.BarCode);
if (addedBook == null)
{
return(RedirectToAction("Books", new { isbn = book.ISBN }));
}
StudentInfo preStudent = addedBook.Keeper;
AppointmentOrLending targetLending =
preStudent?.KeepingBooks.FirstOrDefault(b => b.BookId == addedBook.BarCode);
addedBook.AppointedLatestTime = book.AppointedLatestTime;
addedBook.State = book.State;
addedBook.BorrowTime = book.BorrowTime;
addedBook.MatureTime = null;
preStudent?.KeepingBooks.Remove(targetLending);
if (addedBook.BorrowTime.HasValue)
{
if (book.KeeperId == null)
{
ModelState.AddModelError("", "请检查借阅者");
return(View(book));
}
if (student == null)
{
ModelState.AddModelError("", "不存在该学生");
return(View(book));
}
if (student != null)
{
if (student.KeepingBooks.Count >= student.MaxBooksNumber)
{
TempData["message"] = "该学生借书已超过上限";
}
addedBook.State = BookState.Borrowed;
student.KeepingBooks.Add(new AppointmentOrLending()
{
BookId = addedBook.BarCode,
StudentId = student.UserName
});
addedBook.Keeper = student;
}
addedBook.MatureTime = addedBook.BorrowTime + TimeSpan.FromDays(28);
}
TempData["message"] = "保存成功";
await _lendingInfoDbContext.SaveChangesAsync();
return(RedirectToAction("Books", new { isbn = book.ISBN }));
}
return(View(book));
}