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
