def validateRental(ghostBook, ghostClient):
inBookList = False
repoCaller = Repo()
listOfBooks = repoCaller.getListOfBooks()
listOfRentedBooks = repoCaller.getListOfRentals()
listOfClients = repoCaller.getListOfClients()
for iterator in listOfBooks:
if Book.getBookId(iterator) == Book.getBookId(ghostBook):
inBookList = True
break
if inBookList == False:
raise BookAlreadyRentedOrDoesntExistError
# bookIsRented=True
for books in listOfRentedBooks:
if Book.getBookId(ghostBook) == Rental.getBookId(
books) and Rental.getReturnDate(books) == "notRented":
for iterator in listOfRentedBooks:
if Book.getBookId(iterator) == Book.getBookId(ghostBook):
raise BookAlreadyRentedOrDoesntExistError
clientFound = False
for iterator in listOfClients:
if Client.getClientId(iterator) == Client.getClientId(ghostClient):
clientFound = True
if clientFound == False:
raise ClientAlreadyExistsError
def updateABook(commandInPieces):
# updates a book from the repository
# input - details about the book that must be updated(id) and the values that must be edited
repoCaller = Repo()
listOfBooks = repoCaller.getListOfBooks()
idToUpdate = commandInPieces[1]
newBookId = commandInPieces[2]
newTitle = commandInPieces[3]
newAuthor = commandInPieces[4]
updatedBook = Book(newBookId, newTitle, newAuthor)
position = 0
try:
validateABook(updatedBook)
for iterator in listOfBooks:
if Book.getBookId(iterator) == idToUpdate:
if commandInPieces[0] != "undo":
undoFunction = Undo("updateB", [
"undo", newBookId,
Book.getBookId(iterator),
Book.getBookName(iterator),
Book.getBookAuthor(iterator), "undo", idToUpdate,
newBookId, newTitle, newAuthor
])
repoCaller.addToListOfOperations(undoFunction)
repoCaller.setRedoFalse()
repoCaller.removeBookFromPosition(position)
repoCaller.insertBookIntoPosition(position, updatedBook)
repoCaller.loadIntoFiles()
repoCaller.loadIntoPickle()
break
position += 1
except BookAlreadyExistsError:
print(BookAlreadyExistsError())
return False
def removeABook(commandInPieces):
# removes a book from the repository
# input - details about the book to be removed (id)
repoCaller = Repo()
listOfBooks = repoCaller.getListOfBooks()
idToRemove = commandInPieces[1]
position = 0
removed = False
for iterator in listOfBooks:
if Book.getBookId(iterator) == idToRemove:
if commandInPieces[0] != "undo":
undoFunction = Undo("addB", [
"undo",
Book.getBookId(iterator),
Book.getBookName(iterator),
Book.getBookAuthor(iterator)
])
repoCaller.addToListOfOperations(undoFunction)
repoCaller.setRedoFalse()
repoCaller.removeBookFromPosition(position)
repoCaller.loadIntoFiles()
repoCaller.loadIntoPickle()
removed = True
position += 1
if removed == False:
print(IdOfBookDoesntExist())
return False
def validateABook(newBook):
# checks if a book is already registred
# input - instance of a book
bookCaller = Book
repoCaller = Repo()
listOfBooks = repoCaller.getListOfBooks()
for iterator in listOfBooks:
if bookCaller.getBookId(iterator) == bookCaller.getBookId(newBook):
raise BookAlreadyExistsError()
def listAllBooks(commandInPieces):
# lists books in repository
# input - not important/ not used
repoCaller = Repo()
listOfBooks = repoCaller.getListOfBooks()
s = ""
s += "Books: \n"
for iterator in listOfBooks:
s += Book.bookToString(iterator) + "\n"
return s
def searchABook(commandInPieces):
repoCaller = Repo()
keyToSearch = commandInPieces[1]
listOfBooks = repoCaller.getListOfBooks()
s = ""
s = "Books: \n"
for book in listOfBooks:
if keyToSearch.lower() in Book.getBookId(book).lower():
s += Book.bookToString(book) + "\n"
elif keyToSearch.lower() in Book.getBookAuthor(book).lower():
s += Book.bookToString(book) + "\n"
elif keyToSearch.lower() in Book.getBookName(book).lower():
s += Book.bookToString(book) + "\n"
return s
def showStatistics(null):
repoCaller = Repo()
listOfRentedBooks = repoCaller.getListOfRentals()
mostRentedBooks = repoCaller.getListOfMostRentedBooks()
mostRentedAuthors = repoCaller.getListOfMostRentedAuthors()
mostActiveClients = repoCaller.getListOfMostActiveClients()
listOfBooks = repoCaller.getListOfBooks()
listOfClients = repoCaller.getListOfClients()
booksStatistics = "Books statistic:\n"
authorStatistics = "Author statistics:\n"
clientsStatistics = "Clients statistics:\n"
for rentedBooks in listOfRentedBooks:
try:
mostRentedAuthors[Rental.getBookId(rentedBooks)] += 1
except KeyError:
mostRentedAuthors[Rental.getBookId(rentedBooks)] = 1
for rentedBooks in listOfRentedBooks:
try:
mostRentedBooks[Rental.getBookId(rentedBooks)] += 1
except KeyError:
mostRentedBooks[Rental.getBookId(rentedBooks)] = 1
mostRentedAuthorsList = sorted(mostRentedAuthors.items(),
key=lambda x: x[1],
reverse=True)
mostRentedBooksList = sorted(mostRentedBooks.items(),
key=lambda x: x[1],
reverse=True)
for rentedBooks in mostRentedBooksList:
booksStatistics += "Id of book: " + str(
rentedBooks[0]) + " Rented: " + str(
rentedBooks[1]) + " times" + "\n"
for rentedBooks in mostRentedAuthorsList:
for books in listOfBooks:
if (Book.getBookId(books) == rentedBooks[0]):
authorStatistics += "Author: " + str(
Book.getBookAuthor(books)) + " Rented: " + str(
rentedBooks[1]) + " times" + "\n"
for client in listOfClients:
total = 0
for rent in listOfRentedBooks:
if Client.getClientId(client) == Rental.getClientId(
rent) and rent.getReturnDate() != "notReturned":
difference = Rental.getReturnDate(rent) - Rental.getRentDate(
rent)
total += difference.total_seconds() / 86400
try:
mostActiveClients[Client.getClientName(client)] += total
except KeyError:
repoCaller.addToMostActiveClients(client, total)
mostActiveClientsList = sorted(mostActiveClients.items(),
key=lambda x: x[1],
reverse=True)
for client in mostActiveClientsList:
clientsStatistics += "Name: " + str(
client[0]) + " Total rental days: " + str(client[1]) + "\n"
return [booksStatistics, authorStatistics, clientsStatistics]
