class ClientList():
"""
This class encapsulates the client list and adds easy to use methods for manipulating it
"""
def __init__(self):
self.clientList = list()
self.validator = Validator()
def addNewClient(self, name, cnp):
"""
Adds a new client to the client list
All the parameters are strings
Returns the error list generated by the Validator
O(n)
"""
client = Client(name, cnp)
errorList = self.validator.validateClient(self.clientList, client)
if errorList != []:
return errorList
self.clientList.append(client)
def removeClient(self, name, cnp):
"""
Removes a client from the list
All the parameters are strings
Returns False if the client is not found, True otherwise
O(n)
"""
client = Client(name, cnp)
found = False
for clientInList in reversed(self.clientList):
if clientInList == client:
found = True
self.clientList.pop(self.clientList.index(clientInList))
return found
def updateClient(self, oldName, oldCnp, newName, newCnp):
"""
Replaces a client from the list with a new client
All the parameters are strings
Returns False if the client is not found, True otherwise
O(n)
"""
client = Client(oldName, oldCnp)
newClient = Client(newName, newCnp)
found = False
for clientInList in reversed(self.clientList):
if clientInList == client:
found = True
self.clientList[self.clientList.index(clientInList)] = newClient
return found
def borrowBook(self, book, client):
"""
Adds a Book instance to a client's borrowed book list
book is an instance of a Book
O(1)
"""
client.addBorrowedBook(book)
def returnBook(self, book, client):
"""
Removes a Book instance from a client's borrowed book list
book is an instance of a Book
client is an instance of a Client
O(n)
"""
client.removeBorrowedBook(book)
def numberOfClients(self):
"""
Returns the number of clients from the list
O(1)
"""
return len(self.clientList)
def lastAddedClient(self):
"""
Returns the instance of the latest added client
O(1)
"""
return self.clientList[len(self.clientList) - 1]
def clientInList(self, name, cnp):
"""
Returns the client object from the list, which has the passed details
name and cnp are strings
Returns False if no clients were found
Best case O(1)
Worst case O(n)
Average case O(n)
"""
client = Client(name, cnp)
for clientInList in reversed(self.clientList):
if clientInList == client:
return clientInList
return False
def findClient(self, query):
"""
Searches for books in the client list
Returns a list with instances of all the found clients
query is a string
O(n)
"""
foundClients = list()
for clientInList in reversed(self.clientList):
if clientInList.getName() == query or clientInList.getCnp() == query:
foundClients.append(clientInList)
return foundClients
def orderClients(self, direction):
"""
Returns a client list ordered by activity
Direction is set by the parameter direction which can be
asc or desc
O(n)
"""
reverse = True
if direction == "asc":
reverse = False
return sorted(self.clientList, key=lambda client:client.getActivity(), reverse=reverse)
def __str__(self):
clientList = ""
for client in self.clientList:
clientList += str(client) + '\n'
return clientList
