public bool Remove_Book(objBook t_book)
{
try
{
DataContext dbConnection = Create_DBConnection();
Table <Book.db_Book> bookTable = dbConnection.GetTable <Book.db_Book>();
//Convert DB search to objects
Book.db_Book removeBook = new Book.db_Book
{
Pkey_1 = t_book.PK,
Name = t_book.Name,
ISBN = t_book.ISBN,
Author = t_book.Author,
Publisher = t_book.Publisher
};
bookTable.Attach(removeBook);
bookTable.DeleteOnSubmit(removeBook);
dbConnection.SubmitChanges();
}
catch
{
return(false);
}
return(true);
}
public bool End_Rent(string t_ISBN, DateTime t_Reservation_date, string t_username)
{
try
{
DataContext dbConnection = Create_DBConnection();
Table <Rent.db_Rent> rentTable = dbConnection.GetTable <Rent.db_Rent>();
objUser user = Get_User(t_username);
objBook book = Get_Book(t_ISBN).First();
//select
var returnValue =
from i in rentTable
where i.FKey_User == user.PK && i.FKey_Book == book.PK && i.Lend_date == t_Reservation_date
select i;
//Convert DB search to objects
foreach (var i in returnValue)
{
i.Return_date = DateTime.Now;
}
dbConnection.SubmitChanges();
} catch
{
return(false);
}
return(true);
}
public bool Add_Book(objBook t_book)
{
bool returnValue = true;
try
{
//Get DB connction
var dbConnection = Create_DBConnection();
Book.db_Book newBook = new Book.db_Book
{
Name = t_book.Name,
ISBN = t_book.ISBN,
Author = t_book.Author,
Publisher = t_book.Publisher,
Amount = t_book.Amount,
Avaiable = true
};
//Sql insert
Table <Book.db_Book> reservationTable = dbConnection.GetTable <Book.db_Book>();
reservationTable.InsertOnSubmit(newBook);
dbConnection.SubmitChanges();
}
catch
{
returnValue = false;
}
return(returnValue);
}
public bool Approve_Reservation(string t_ISBN, string t_Username)
{
objBook book = Get_Book(t_ISBN).First();
objUser user = Get_User(t_Username);
try {
var dbConnection = Create_DBConnection();
DateTime today = DateTime.Now;
DateTime returnDate = today.AddDays(30);
Rent.db_Rent rent = new Rent.db_Rent
{
Lend_date = today,
End_rentdate = returnDate,
FKey_Book = book.PK,
FKey_User = user.PK
};
// Add the new object to the Orders collection.
Table <Rent.db_Rent> rentTable = dbConnection.GetTable <Rent.db_Rent>();
rentTable.InsertOnSubmit(rent);
dbConnection.SubmitChanges();
//Set done flag on Reservation
Set_DoneFlag(t_ISBN, true);
} catch
{
return(false);
}
return(true);
}
private void BtnRent_Click(object sender, RoutedEventArgs e)
{
if (lvFoundBooks.SelectedIndex == -1)
{
MessageBox.Show("Please select a book", "Please enter a search string", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
//Pop Up reservation question
//first I should check if the book is currently avaiable
//call function check reservation
//Create view object
Controller con = new Controller();
objBook selectBook = (objBook)lvFoundBooks.Items[lvFoundBooks.SelectedIndex];
if (!con.Get_ReservationState(selectBook.ISBN))
{
MessageBox.Show("Book is currently not avaiable", "Sorry", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
//ask for approvle
var reservationChoice = MessageBox.Show("Do you want to make a reservation for the book " + selectBook.Name + " from " + selectBook.Author, "Are your sure?", MessageBoxButton.YesNo, MessageBoxImage.Warning);
if (reservationChoice.ToString() == "No")
{
return;
}
//Do reservation sql boooooooooooooy
con.Set_Reseravtion(selectBook.ISBN, User);
}
//Check if a book is currently avaiable or not
public bool Get_ReservationState(string t_ISBN)
{
//Get DB connction
var dbConnection = Create_DBConnection();
objBook book = Get_Book(t_ISBN).First();
return(book.Avaiable);
}
//Get books by Name -> Change it later so you can search with whatever you want (more than one constructor or how can I do that?)
public List <objBook> Get_Book(string t_name)
{
DataContext dbConnection = Create_DBConnection();
Table <Book.db_Book> bookTable = dbConnection.GetTable <Book.db_Book>();
//return value
var returnList = new List <objBook>();
//definiere nach was man suchen muss
var returnedBooks = Enumerable.Empty <Book.db_Book>().AsQueryable();
//checken ob es eine ISBN Nummer ist
string pattern = @"[0-9]*[-| ][0-9]*[-| ][0-9]*[-| ][0-9]*[-| ][0-9]*";
Regex rg = new Regex(pattern);
if (rg.IsMatch(t_name))
{
//search for ISBN
returnedBooks =
from i_u in bookTable
where i_u.ISBN == t_name
select i_u;
}
else if (t_name.ToLower() == "all")
{
returnedBooks =
from i_u in bookTable
select i_u;
}
else
{
//search for author, titel, publisher
returnedBooks =
from i_u in bookTable
where i_u.Name == t_name || i_u.Author == t_name || i_u.Publisher == t_name
select i_u;
}
//Convert DB search to objects
foreach (var i in returnedBooks)
{
var book = new objBook(i.Name, i.ISBN, i.Author, i.Publisher, i.Pkey_1, i.Amount, i.Avaiable);
returnList.Add(book);
}
//Close DB connection
dbConnection.Dispose();
return(returnList);
}
public bool Set_DoneFlag(string t_ISBN, bool t_value)
{
//Get DB connction
var dbConnection = Create_DBConnection();
Table <Reservation.db_Reservation> reservationTable = dbConnection.GetTable <Reservation.db_Reservation>();
objBook book = Get_Book(t_ISBN).First();
var reservationList = new List <objReservation>();
//select
var currentReservations =
from i_u in reservationTable
where i_u.FKey_Book == book.PK
select i_u;
foreach (var i in currentReservations)
{
i.Done = t_value;
}
dbConnection.SubmitChanges();
return(true);
}
//Create a reservation
public bool Set_Reseravtion(string t_ISBN, string t_CurrentUser)
{
bool returnValue = true;
try
{
//Get DB connction
var dbConnection = Create_DBConnection();
//Get_CurrentUser
objUser user = Get_User(t_CurrentUser);
//Get Book for reservation
objBook book = Get_Book(t_ISBN).First();
//Sql insert
// Create a new Order object.
Reservation.db_Reservation reservation = new Reservation.db_Reservation
{
Reservation_date = DateTime.Now,
Done = false,
FKey_Book = book.PK,
FKey_User = user.PK
};
// Add the new object to the Orders collection.
Table <Reservation.db_Reservation> reservationTable = dbConnection.GetTable <Reservation.db_Reservation>();
reservationTable.InsertOnSubmit(reservation);
dbConnection.SubmitChanges();
}
catch
{
returnValue = false;
}
return(returnValue);
}
