Library_Managment

'''
-------- Library Managment System --------
This is a Library managment GUI
Author: Divyansh Chourey

'''
#importing libraries
from tkinter import *
from tkinter import messagebox
import os

'''-------- Creating class --------'''
#Creating Library class
class Library_gui(Tk):
    def __init__(self, book_list):
        super().__init__()
        self.geometry("1365x635")
        self.title("Library Managment")
        self.book_list=book_list

    #Heading of first page
    def head_label(self):
        lab=Label(self, text="Central Library", font="arial 16 bold", pady=40)
        lab.pack()

    '''------ Buttons to be placed ------'''
    def list_books_btn(self, func):
        btn=Button(self,text="List Book", command=func, padx=57, borderwidth=6, relief=RAISED)
        btn.pack()

    def borrow_btn(self, func):
        btn=Button(self,text="Borrow Book", command=func, padx=30, borderwidth=6, relief=RAISED)
        btn.pack()

    def return_book_btn(self, func):
        btn=Button(self,text="Return Book", command=func, padx=36, borderwidth=6, relief=RAISED)
        btn.pack()

    def exit_btn(self):
        btn=Button(self,text="Exit", command=quit, padx=105, borderwidth=6, relief=RAISED)
        btn.pack()

    def about_btn(self):
        def about_func():
            messagebox.showinfo("About", "This is a Library managment GUI\nCreated by Divyansh Chourey")
        btn=Button(self, text="About", command=about_func, padx=87, borderwidth=6, relief=RAISED)
        btn.pack()

    '''------- Functions for button. --------'''
    #Function for listing all the books
    def list_books_func(self):
        win_book=Toplevel()
        win_book.title("List of avalible books.")
        win_book.geometry("1365x635")

        Label(win_book, text="The avalible books are:\n", font="arial 10 italic").pack()
        for bookList in self.book_list:
            Label(win_book, text=bookList).pack()

        back=Button(win_book, text="Back", command=win_book.destroy, borderwidth=6, relief=RAISED)
        back.pack(side=BOTTOM, anchor='sw')

        win_book.mainloop()

    #Function for borrow button
    def borrow_func(self):
        win_borrow=Toplevel()
        win_borrow.title("Borrow a book.")
        win_borrow.geometry("1365x635")

        user=Entry(win_borrow, font="arial 10 italic")
        user.pack()

        def func_borrow():
            if user.get().title() in self.book_list:
                messagebox.showinfo("Borrowing....", f"You have been issued {user.get().title()}")
                self.book_list.remove(user.get().title())
                with open('books.txt', 'r') as f:
                    lines=f.readlines()
                with open ('books.txt', 'w') as f:
                    for line in lines:
                        if line.strip("\n") != user.get().title():
                            f.write(line)

            else:
                messagebox.showinfo("Borrowing....", f"{user.get()} is not avalible.")


        btn_borrow=Button(win_borrow, text="Borrow book", command=func_borrow, borderwidth=6, relief=RAISED)
        btn_borrow.pack()

        back=Button(win_borrow, text="Back", command=win_borrow.destroy, borderwidth=6, relief=RAISED)
        back.pack(side=BOTTOM, anchor='sw')

        win_borrow.mainloop()

    #Function for return button
    def return_func(self):
        win_return=Toplevel()
        win_return.title("Returning book.")
        win_return.geometry("1365x635")

        user=Entry(win_return, font="arial 10 italic")
        user.pack()

        def func_return():
            self.book_list.append(user.get().title())
            messagebox.showinfo("Returning......", f"Thanks for returning/donating\n {user.get().title()}")
            with open ("books.txt", 'a') as f:
                f.write("\n"+user.get().title())

        btn_return=Button(win_return, text="Return", command=func_return, borderwidth=6, relief=RAISED)
        btn_return.pack()

        back=Button(win_return, text="Back", command=win_return.destroy, borderwidth=6, relief=RAISED)
        back.pack(side=BOTTOM, anchor='sw')

        win_return.mainloop()

if __name__=='__main__':
    #In case when books.txt not found
    write_books='''
    Python Notes
    Theory of everything
    Out Look
    A Brief History of Time
    '''
    if (not os.path.exists("books.txt")):
        with open("books.txt", 'w') as f:
            f.write(write_books)
    #Opening books.txt file
    with open ("books.txt", 'r') as f:
        content=f.read()
        content=content.split("\n")

    #Creating GUI
    window=Library_gui(content)

    window.head_label()
    window.list_books_btn(window.list_books_func)
    window.borrow_btn(window.borrow_func)
    window.return_book_btn(window.return_func)
    window.about_btn()
    window.exit_btn()

    window.mainloop()