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importmysql.connector
frommysql.connectorimportError
importdatetime
defconnection_creator(hostname,username,password,db):
connection=None
try:
connection=mysql.connector.connect(host=hostname,user=username,password=password,database=db)
print("connection to MYSQL is successfull")
exceptErroraserr:
print("The error ",{err} ," occured")
returnconnection
defcreate_database(connection ,query):
mycursor=connection.cursor()
try:
mycursor.execute(query)
print("Database created")
exceptErroraserr:
print(f"The error '{err}' occurred")
classBooks:
def__init__(self,name,author,copies):
self.name=name
self.author=author
self.status=False
self.copies=copies
self.issuedate=None
self.returndate=None
defadd_copies(self,n):
self.copies+=n
defset_status(self,status):
self.status=status
classlibrary:
def__init__(self):
self.__librarianAccount={'admin':'admin'}
self.db=connection_creator("localhost" ,"root" ,"imranfrommoradabad231321","lmsDBMS")
self.mycursor=self.db.cursor(buffered=True)
self.displayTables
self.Id=None
# create_database_query = "CREATE DATABASE lmsDBMS"
# create_database(self.db, create_database_query)
# self.mycursor.execute(f"CREATE DATABASE lmsDBMS")
# print(self.db)
# self.createusertable()
# self.createtransactionTable()
# self.books = {}
self.mainMenu()
defcreatebooksTable(self):
query="""
CREATE TABLE Books (
BookID INT AUTO_INCREMENT PRIMARY KEY,
BookName VARCHAR(100),
BookAuthor VARCHAR(100),
BookStatus BOOLEAN,
TotalCopies INT,
AvailableCopies INT
)
"""
self.mycursor.execute(query)
self.db.commit()
defcreateusertable(self):
query="""
CREATE TABLE Users (
UserID INT AUTO_INCREMENT PRIMARY KEY,
UserName VARCHAR(100),
UserAddress VARCHAR(100),
blockStatus BOOLEAN
)
"""
self.mycursor.execute(query)
self.db.commit()
defcreatetransactionTable(self):
create_table_query="""
CREATE TABLE transactions (
transaction_id INT AUTO_INCREMENT PRIMARY KEY,
userID INT,
bookID INT,
issue_date DATE,
return_date DATE,
return_status VARCHAR(20),
FOREIGN KEY (userID) REFERENCES users(userID),
FOREIGN KEY (bookID) REFERENCES books(bookID)
)
"""
# Execute the query
self.mycursor.execute(create_table_query)
# Commit the changes
self.db.commit()
#func to identify librarian or user
defloginInfo(self):
print('Who are you?\n1.Librarian 2.LMS user 3.Quit' )
returninput('Enter (1,2 or 3)\n')
defdisplayTables(self):
show_tables_query="SHOW TABLES;"
self.mycursor.execute(show_tables_query)
tables=self.mycursor.fetchall()
fortableintables:
print(table[0])
describetable=f"DESCRIBE {table[0]}"
self.mycursor.execute(describetable)
table_description=self.mycursor.fetchall()
forcolumn_infointable_description:
print(column_info)
defmainMenu(self):
print('Welcome to Namal Library System')
# self.createbooksTable()
self.displayTables()
self.DisplayData('books')
whileTrue:
ques=self.loginInfo()
ifques=='1':
login=self.librarian_login()
iflogin:
self.LibrarianMenu()
else:
print('Incorrect Credentials')
elifques=='2':
whileself.UserPage():
pass
elifques=='3':
break
else:
print('Enter correct Number please')
#librarian login
deflibrarian_login(self):
whileTrue:
username=input('Enter Your username:')
password=input('Enter Your Password:')
ifusernameinself.__librarianAccountandself.__librarianAccount[username]==password:
print('Access granted')
returnTrue
else:
print('Access Denied')
relogin=input('Want to login again?(y/n)')
ifrelogin=='y':
continue
else:
returnFalse
#Librarian functions ADD_book,Delete_book
defLibrarianMenu(self):
print('Welcome to LMS')
print('Type followin number to perform respective actions:')
print('1.Add Book')
task=input()
iftask=='1':
self.AddBook()
eliftask=='2':
self.DeleteBook()
defDisplayData(self,table):
select_query=f"SELECT * FROM {table}"
self.mycursor.execute(select_query)
rows=self.mycursor.fetchall()
forrowinrows:
print(row)
defAddBook(self):
try:
bookname=input('Enter book Name: ')
bookauthor=input('Enter Author Name:')
try:
copies=int(input('how many copies are you adding?'))
exceptValueError:
raiseValueError('Incorrect number of copies')
AddBookQuery="""
INSERT INTO books (BookName, BookAuthor, BookStatus, TotalCopies, AvailableCopies)
VALUES (%s, %s, %s, %s, %s)
"""
values= (bookname, bookauthor, False, copies, copies)
self.mycursor.execute(AddBookQuery, values)
self.db.commit()
print('Book is Successfully added.')
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
defAreAvailableAndTotalcopiesEqual(self,bookname,bookauthor):
select_query="""
SELECT TotalCopies, AvailableCopies
FROM books
WHERE BookName = %s
AND BookAuthor = %s
"""
values= (bookname, bookauthor)
self.mycursor.execute(select_query, values)
copies=self.mycursor.fetchone()
returncopies[0]==copies[1],copies[0]
defDeleteBook(self):
try:
bookname=input('Enter book Name: ')
bookauthor=input('Enter Author Name:')
try:
copies=input('how many copies do you want to delete(type A to delete All copies)?')
exceptValueError:
raiseValueError('Incorrect number of copies')
ifcopies=='A':
DeleteBookQuery="""
DELETE FROM books
WHERE BookName = %s
AND BookAuthor = %s
"""
values= (bookname, bookauthor)
self.mycursor.execute(DeleteBookQuery, values)
self.db.commit()
print('Successfully Deleted.')
else:
check,Totalcopies=self.AreAvailableAndTotalcopiesEqual()
ifcheck():
updateQuery="""
UPDATE books
SET TotalCopies = %s, AvailableCopies = %s
WHERE BookName = %s
AND BookAuthor = %s
"""
values= (Totalcopies, Totalcopies, bookname, bookauthor)
self.mycursor.execute(updateQuery, values)
self.db.commit()
print('Successfully Deleted.')
else:
print(f'Kindly recieve all issued books from users,to modify copies of {bookname} Book')
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
defUserPage(self):
whileTrue:
task=input('1.Login\t\t2.SignUp\t\t3.Quit')
iftask=='1':
self.Userlogin()
eliftask=='2':
self.UserSignUp()
eliftask=='3':
break
else:
print('Enter Correct Number:)')
defUserlogin(self):
whileTrue:
username=input('Enter Your username:')
password=input('Enter Your Password:')
self.userId=self.UserloginCheck(username,password)
ifself.userId==None:
print('Incorrect Credentials:)')
ifinput('Loin aain?(y/n)')=='y':
pass
else:
break
else:
print('Login Successfull')
self.UserMenu()
defAddUserInDBMS(self,username,useraddress,blockstatus,password):
try :
insert_query="""
INSERT INTO Users (UserName, UserAddress, blockStatus,Password)
VALUES (%s, %s, %s,%s)
"""
values= (username, useraddress, blockstatus,password)
self.mycursor.execute(insert_query, values)
self.db.commit()
print('User added successfully.')
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
defUsernamecheck(self,username):
try:
select_query="""
SELECT COUNT(*)
FROM Users
WHERE UserName = %s
"""
values= (username,)
self.mycursor.execute(select_query, values)
user_count=self.mycursor.fetchone()
returnuser_count[0] >0
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
returnNone
defUserSignUp(self):
whileTrue:
username=input('Enter your Username:')
ifself.Usernamecheck(username):
print('Username Already Exist!')
else:
break
password=input('Enter your Password:')
location=input('Enter your Location:')
self.AddUserInDBMS(username,location,False,password)
defUserloginCheck(self,username,password):
try:
select_query="""
SELECT UserID
FROM Users
WHERE UserName = %s AND Password = %s
"""
values= (username, password)
self.mycursor.execute(select_query, values)
user_id=self.mycursor.fetchone()
returnuser_id[0] ifuser_idelseNone
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
returnNone
defUserMenu(self):
whileTrue:
task=input('Enter following Number to perform following Tasks\n1.searc Book\n2.Return Book')
iftask=='1':
self.SearchBook()
eliftask=='2':
self.ReturnBook()
else:
print('Enter correct Number')
defSearchBook(self):
try:
keyword=input("Enter Name of Book or Author:")
search_query="""
SELECT *
FROM books
WHERE BookName LIKE %s OR BookAuthor LIKE %s
"""
keyword=f"%{keyword}%"
values= (keyword, keyword)
self.mycursor.execute(search_query, values)
books=self.mycursor.fetchall()
ifbooks:
forbookinbooks:
print("Name of Book :",book[1])
print("Name of Author :",book[2])
print("Available copies :",book[5])
issue=input("Want to issue tis book?(y/n)")
ifissue=="y":
self.IssueBook(book[0])
else:
print('No matching books found.')
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
returnNone
defIssueBook(self,bookid):
try:
today=datetime.today()
return_date=today+datetime.timedelta(days=5)
insert_query="""
INSERT INTO transactions (userID, bookID, issue_date, return_date, return_status)
VALUES (%s, %s, %s, %s, %s)
"""
values= (self.userId, bookid,today, return_date, False)
self.mycursor.execute(insert_query, values)
self.db.commit()
print('Book Issue successfully.')
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
defReturnBook(self,bookid):
try:
select_query="""
SELECT *
FROM transactions
WHERE userID = %s AND bookID = %s
"""
values= (self.userId,bookid)
self.mycursor.execute(select_query, values)
transaction_details=self.mycursor.fetchone()
exceptmysql.connector.Erroraserr:
print(f"Error: {err}")
returnNone
iftransaction_details:
print(f'Transaction Details: {transaction_details}')
alter_query="""
ALTER TABLE transactions
MODIFY COLUMN return_status BOOLEAN DEFAULT TRUE
"""
self.mycursor.execute(alter_query)
self.db.commit()
print('Book returned successfully.')
else:
print('No matching transaction found.')
library()