COMP642 Advanced Programming
Exercise 2 – Object Oriented Programming
Worth: 20%
Due: Monday 30 August 2021 5:00pm.
Late Penalty: Work not received by the due time attracts an immediate penalty of
25% of the marks available. No work will be accepted after
Wednesday 1 September 2021 5:00pm.
Submission: Zip your completed files and submit the .zip through the link on
COMP642 LEARN page.
Overview
Create a Python application to manage information for a small video rental shop. At the end
of this document is the outline of a design for the model (Video and Customer classes) and
the VideoStore which acts as the controller. You may base your application on the design at
the end of the document or on the one you developed yourself for Exercise 1.
Criteria
Your application must:
? Run correctly to the specified requirements
? Read the supplied files and create the appropriate video and customer objects
? Allow a video to be rented by a customer
? Allow a video to be returned by a customer
? Display full information for a selected customer (including total payment)
? Display full information for a selected video
? Display summary information about a customer and the videos they have borrowed
? Have a user interface with:
o appropriate controls
o useful feedback
o prevention of input errors
Your code must:
? Make appropriate use of the model and controller classes provided or as submitted
in Exercise 1
? Well-structured and easy to maintain
? Be appropriately commented

COMP642 | OO programming Exercise | Page 2
What you are to do:
You are to create a Python application manage the video store. The two files “Customer.txt”
and “Video.txt” contain information about customers and videos and can be downloaded
from COMP642 web page.
1. Adapt as necessary your design from Exercise 1 (or use the suggested design attached)
so that:
? A video can be rented out to a customer (if the video is available)
? A video can be returned by a customer (who has rented the video)
? A payment is charged to the customer when they rent a video.
? Each customer keeps a list of all the videos they currently rent
? Every time a video is rented by a customer, the video is appended to the customer’s
video list.
? Every time a video is returned by a customer, this video is removed from the
customer’s video list.
? It provides the following information for customers:
o The customer personal information (name, city, etc.)
o The list of videos currently rented by the customer
o The total amount paid for video rental


? It should provide the following information for videos (video title, the year and the
availability).


2. Write and test the code for all the classes in your design.

3. Write code for an application that uses the classes in your design to:
? Read the files and create the appropriate customers and video objects (your
Controller will have methods to create these objects)
? Allow the user to rent a video to a customer
? Allow the user to return a video from a customer
? Allow the user to view full information about a selected customer
? Allow the user to view full information about a selected video
? Have an appropriately designed view (interface). An example is shown in Figure 1.


COMP642 | OO programming Exercise | Page 3

Figure 1- A Video Rental Application View
4. Your application:
? Does not have to provide facilities for the user to add new videos or customers, or to
delete existing objects.
? Does not have to provide facilities for user to amend details of rental, customers or
videos (other than adding videos to the rental list of the customer).
? Does not have to provide facilities to deal with late returns.

Marking
Criteria Marks (out of 100)
File Read Functionality 10
Rent and Return functionalities 40
View customer and video information 20
User Interface (View) Functionality 10
Coding style, comments, clear logic 20



All videos All customers
Rent and return
buttons
Customer’s
information
Video’s information
COMP642 | OO programming Exercise | Page 4
Possible Design for Exercise 1
class Video:

#constructor, need title, year and status
def __init__(self, title, year):
pass

#getter and setter for videoTitle

#getter and setter for videoYear

#getter and setter for videoStatus

def detailInfo(self):
#detail information for video
pass

class Customer:

#constructor, need name, city, payment and list of videos
def __init(self,cname, ccity):
pass

#getter and setter for name

#getter and setter for city

#getter and setter for payment

#getter for video list

#add a video to the list
def addRental(self, aMovie):
pass

#remove a video from the list
def removeVideo(self,aMovie):
pass

#update payment
def updatePayment(self):
pass

#customer detailed information
def info(self):
pass

COMP642 | OO programming Exercise | Page 5
class VideoStore:

#constructor to initialise customer list and video list
def __init__(self):
pass

#add movie to the list
def addMovie(self, aMovie):
pass

#add customer to the list
def addCustomer(self):
pass

#rent a movie, returns a boolean status
def rentMovie(self, aCust, aMovie):
pass

#return a movie
def returnMovie(self, aCust, aMovie):
pass

#find a movie based on a title, returns video object or None
def findMovie(self, aTitle):
pass

#find a customer based on name, returns a customer object or None
def findCustomer(self, aName):
pass