def __init__(self, filename):
"""
Constructor method
Opens the file and loads the entries in memory
filename is a string, the path to the file used for storage
O(n)
"""
BookList.__init__(self)
self.__filename = filename
try:
self.__bookFile = open(self.__filename, "r")
except IOError:
# File does not exist. Create it.
self.__bookFile = open(self.__filename, "w")
self.__bookFile.close()
self.__bookFile = open(self.__filename, "r")
line = "Nonempty String"
while (line != ""):
line = self.__bookFile.readline()
if (line == "" or line == "\n"):
break
details = line.split("|")
book = Book(details[0].strip(), details[1].strip(), details[2].strip())
if details[3] == "True":
book.setBorrowed(True)
book.setPopularity(int(details[4]))
self.bookList.append(book)
self.__bookFile.close()
def addNewBook(self, title, author, description):
"""
Public method that overwrites the one in the BookList
Extra functionality: Appends the newly added Book to the file
O(1)
"""
self.bookFile = open(self.__filename, "a")
book = Book(title, author, description)
errorList = self.validator.validateBook(book)
if errorList != []:
return errorList
self.bookList.append(book)
self.bookFile.write(book.getTitle() + "|" + book.getAuthor() + "|" + book.getDescription() + "|" + \
"False" + "|" + "0" +"\n")
self.bookFile.close()
def addNewBook(self, title, author, description):
"""
Public method that overwrites the one in the BookList
Extra functionality: Appends the newly added Book to the file
O(1)
"""
self.bookFile = open(self.__filename, "a")
book = Book(title, author, description)
errorList = self.validator.validateBook(book)
if errorList != []:
return errorList
self.bookList.append(book)
self.bookFile.write(book.getTitle() + "|" + book.getAuthor() + "|" + book.getDescription() + "|" + \
"False" + "|" + "0" +"\n")
self.bookFile.close()
def updateBook(self, oldTitle, oldAuthor, oldDescription, \
newTitle, newAuthor, newDescription):
"""
Replaces a book from the list with a new book
All the parameters are strings
Returns False if the book is not found, True otherwise
O(n)
"""
book = Book(oldTitle, oldAuthor, oldDescription)
newBook = Book(newTitle, newAuthor, newDescription)
found = False
for bookInList in reversed(self.bookList):
if bookInList == book:
found = True
self.bookList[self.bookList.index(bookInList)] = newBook
return found
def updateBook(self, oldTitle, oldAuthor, oldDescription, \
newTitle, newAuthor, newDescription):
"""
Public method that overwrites the one in BookList
Extra functionality: Writes the entire list to the file
O(n)
"""
book = Book(oldTitle, oldAuthor, oldDescription)
newBook = Book(newTitle, newAuthor, newDescription)
found = False
for bookInList in reversed(self.bookList):
if bookInList == book:
found = True
self.bookList[self.bookList.index(bookInList)] = newBook
self.__listToFile()
return found
def __init__(self, filename):
"""
Constructor method
Opens the file and loads the entries in memory
filename is a string, the path to the file used for storage
O(n)
"""
ClientList.__init__(self)
self.__filename = filename
try:
self.__clientFile = open(filename, "r")
except IOError:
# File does not exist. Create it.
self.__clientFile = open(filename, "w")
self.__clientFile.close()
self.__clientFile = open(filename, "r")
line = "Nonempty String"
while line != "":
line = self.__clientFile.readline()
if line == "" or line == "\n":
break
details = line.split("|")
client = Client(details[0], details[1])
if details[2] != "":
borrowedBooks = details[2].split(";")
for borrowedBook in borrowedBooks:
if borrowedBook != "":
bookDetails = borrowedBook.split()
book = Book(bookDetails[0], bookDetails[1],
bookDetails[2])
client.addBorrowedBook(book)
client.setActivity(int(details[3]))
self.clientList.append(client)
self.__clientFile.close()
def bookInList(self, title, author, description):
"""
Returns a list of book instances that have the passed details
All the parameters are strings
O(n)
"""
book = Book(title, author, description)
booksFound = []
for bookInList in reversed(self.bookList):
if bookInList == book:
booksFound.append(bookInList)
return booksFound
def addNewBook(self, title, author, description):
"""
Adds a new book to the book list
All the parameters are strings
Returns an error list generated by the Validator
O(1)
"""
book = Book(title, author, description)
errorList = self.validator.validateBook(book)
if errorList != []:
return errorList
self.bookList.append(book)
def __init__(self, filename):
"""
Constructor method
Opens the file and loads the entries in memory
filename is a string, the path to the file used for storage
O(n)
"""
BookList.__init__(self)
self.__filename = filename
try:
self.__bookFile = open(self.__filename, "r")
except IOError:
# File does not exist. Create it.
self.__bookFile = open(self.__filename, "w")
self.__bookFile.close()
self.__bookFile = open(self.__filename, "r")
line = "Nonempty String"
while (line != ""):
line = self.__bookFile.readline()
if (line == "" or line == "\n"):
break
details = line.split("|")
book = Book(details[0].strip(), details[1].strip(),
details[2].strip())
if details[3] == "True":
book.setBorrowed(True)
book.setPopularity(int(details[4]))
self.bookList.append(book)
self.__bookFile.close()
def removeBook(self, title, author, description):
"""
Controller Method to remove a book
the parameters are all strings
Returns False if the book was not found, True otherwise
Best case O(1)
Worst case O(n)
Average case O(n)
"""
book = Book(title, author, description)
if not self.__bookList.removeBook(book, 0):
return False
return True
def test_Book():
book = Book("title", "author", "description")
assert book.getTitle() == "title"
assert book.getAuthor() == "author"
assert book.getDescription() == "description"
book.setBorrowed(True)
assert book.isBorrowed() == True
book.setAuthor("new author")
assert book.getAuthor() == "new author"
book.setDescription(None)
book.setTitle("new title")
assert book.getTitle() == "new title"
book.setPopularity(1)
assert book.getPopularity() == 1
assert book.getDescription() == None
book.setId(0)
def test_Book():
book = Book("title", "author", "description")
assert book.getTitle() == "title"
assert book.getAuthor() == "author"
assert book.getDescription() == "description"
book.setBorrowed(True)
assert book.isBorrowed() == True
book.setAuthor("new author")
assert book.getAuthor() == "new author"
book.setDescription(None)
book.setTitle("new title")
assert book.getTitle() == "new title"
book.setPopularity(1)
assert book.getPopularity() == 1
assert book.getDescription() == None
book.setId(0)