讲解 ICT239、辅导 Python程序设计
Web Application Development
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Tutor-Marked Assignment
January 2024 Presentation
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SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 2 of 19
TUTOR-MARKED ASSIGNMENT (TMA)
This assignment is worth 24% of the final mark for ICT239 - Web Application Development
The cut-off date for this assignment is Tuesday, 12 March 2024, 2355hrs.
Note to Students:
You MUST use the provided solution template accompanying this TMA.
Answer all questions. (Total 100 marks)
Section A
Question 1 concerns the Staycation case study.
Question 1 (35 marks)
(a) Follow the steps stated as follows. While you are performing the steps, do a
recording of you running through the steps to launch Staycation demo on
Vocareum.
1. Login to Vocareum via Canvas, start VS Code and open the folder to
ICT239 Past References/staycation/app
2. Start a new terminal and setup the virtual environment and install packages
• python3 –m venv venv
• . venv/bin/activate
• pip install –r requirements
3. Start the app
4. Start the browser to connect to the app
5. Register an admin user, Admin, admin@abc.com, password:12345
6. Login using the registered admin user account: admin@abc.com
7. Click on 'Upload' at the sidebar to get the Upload page.
8. Select data type Package and upload staycation.csv. Next, select data type
Users and upload users.csv. Finally, select data type Booking and upload
the file booking.csv. The files can be downloaded from ICT239 Past
References/staycation/app/assets/js folder and to initialize the database for
charting.
9. Click on 'Dashboard' to display the chart.
10. Use Compass on the desktop workspace to demonstrate in your video that
the database contains the data of the user accounts, packages and bookings
correctly.
(4 marks)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 3 of 19
Your answer to parts (b) – (d) must show clear understanding of the various components in the
Staycation application. In order to do well in this section, you must provide a thorough answer
as well as highlight code by copying ONLY necessary code to be used in your explanation.
You should highlight small chunks of code and explain how each chunk contributes to your
answer.
There is penalty if relevant code does not accompany an explanation for each sub-part or if
irrelevant code is included in your explanation.
(b) This question part refers to the code in the frontend component.
(i) Explain how bootstrap positions the sidebar, the top panel and the centre
panel of a web page in the Staycation application.
(ii) Explain how the web page can respond to various screen sizes. In particular,
explain using the web page you get when you click on the link Packages on
the side bar.
(iii) Explain 5 styling effects applied to the sidebar.
(iv) Explain jinja inheritance as applied in the staycation application for the page
displayed for part (b) (ii).
(15 marks)
(c) In step 3 of part (a), the application starts, and in step 4 of part (a), the first web
page is displayed.
(i) Identify the html page displayed.
(ii) Explain the HTTP request that causes the first page to be displayed.
Specifically, explain how, where the HTTP request is made, and the type of
HTTP request made.
(iii) Explain the interaction between the frontend component and backend
component that produces a HTTP response to cause the web page to be
displayed. Show the relevant code and use the code to explain the interaction.
For this sub-part, you should explain how flask handles URL routing in this
situation and the HTTP response.
(8 mark)
(d) In step 8 of part (a), the user can upload files to the backend.
(i) Explain why the view function upload caters to both GET and POST
requests. Is it preferable to have two different view functions instead? Give
reasons for your answer.
(ii) Explain how the backend accesses the additional data that accompanies the
GET and POST HTTP requests, if any, for the upload function.
(8 mark)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 4 of 19
Section B
Questions 2 – 4 concern the development of a Web application for meal orders. The application
scenario is based on ICT162 July 2023 semester TMA with some modifications.
Eat-Right-Programme (ERP) is a pilot programme of Healthier SG. The key objective of ERP
is to encourage Singaporeans to take charge of their diets, leading to healthier lifestyles and see
better health outcomes. Singaporeans above 12 years old can enrol in ERP.
To debunk the myth that Healthy food is expensive, bland, and boring. ERP will offer Delis
that are deliciously prepared by food providers/agencies, using recipes with strict requirements
on calories and fat content.
In ERP, participants can “Order” their meals by selecting Delis to form a DeliSet first. DeliSets
are saved and can be repeatedly ordered.
This section will focus on
• displaying information about the ERP program, and the available cold and hot delis
(questions 2a).
Refer to the appendix for code for classes that you can use to implement question2 (a).
Subsequently, you are to modify the classes in the appendix for question 2(b) so that
data is stored in Mongodb instead of class variables.
• creating an admin user account if the account is not yet created, registering non-admin
users or participants, logging users in and out (question 2c).
• allowing participants to create deli sets, place order and view their orders (question 3).
• Allowing the admin user to upload participants, delis and orders (question 4).
You are required to provide explanations for ALL your implementations to show your
understanding of the following items where applicable,
✓ the model, view and controller components in your implementation and the purpose of
the components specifically for the question you are answering
✓ the application of HTML and CSS
✓ the application of Bootstrap
✓ the interactions amongst the frontend and backend components that you added.
✓ the application of jinja variables, template filters, statements, inheritance, macros etc
✓ any other explanation required for a specific part of a question
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 5 of 19
Question 2 (26 marks)
Learning objectives:
• Develop a HTML/CSS and Python web framework program
• Apply programming methods to present information in HTML
• Employ web programming framework for developing website
You are to submit both implementations for part (a) and (b) as two separate applications.
(a) About and Delis
Create a Flask application with a hyperlink About which leads to the home page
shown in Figure Q2(a) (i).
Figure Q2(a) (i): The home page or the About page
The Deli page shows the Cold Delis followed by the Hot Delis as shown in Figure
Q2(a) (ii) and (iii).
Figure Q2(a) (ii) The Delis page shows cold delis followed by hot delis
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 6 of 19
Figure Q2(a) (iii) The Delis page shows hot delis following the cold delis
You must apply responsive web design in your implementation of the pages so that
the pages can adapt to various screen sizes. Figure 2(a) (iv) shows the About page
on a small screen with side bar and top panel collapsed. When the side bar and top
panel are expanded, they are similarly displayed as in Figure 2(a) (viii).
Figure Q2(a) (iv) The About page on small screen size
Figure 2 (a) (v) – (viii) show the Deli page on various screen sizes. Figure 2 (a)
(viii) shows the Deli page on a small screen with side bar and top panel expanded.
The same hamburger icon as in the About page will show instead when side bar
and top panel are collapsed.
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 7 of 19
Figure Q2(a) (v)
Figure Q2(a) (vi)
Figure Q2(a) (vii)
Figure Q2(a) (viii) Side bar and top panel
expanded
Figure Q2(a) (iv) The Deli page on various screen sizes
Figure Q2a(ix) shows how a link on the sidebar should look like when you hover
over it.
Figure Q2(a) (ix) The sidebar when you hover over a link
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 8 of 19
You must apply jinja and jinja inheritance in your implementation and to use the
data in the class variables. Do NOT hardcode the data in the class variables in any
html page.
(10 marks)
(b) Make a copy of your implementation for part (a) so that you can modify the copy
for part (b). Submit part (a) in a separate folder. Part (b) will be used for subsequent
development for parts (b) and (c) of this question as well as for questions 3 and 4.
For part (b), you no longer use class variables to store data for the delis. Instead,
use MongoDB database to store data about delis. Figure Q2(b) shows the complete
class diagram for the application. The relevant classes for part (b) are Deli,
ColdDeli and HotDeli.
Implement these three classes such that when a required collection in the database
is empty, data is read from the global variable, all_delis and stored into
MongoDB. You may design and implement any method you consider necessary
for the classes to achieve the same effects as described in part (a).
Highlight and provide reasons for the changes you make to part (a) to implement
part (b) using MongoDB database. Include in your answer the changes you made
to the frontend and/or backend components of your flask application, including
code to set up the database.
Figure Q2(b) Complete class diagram
(7 marks)
(c) Register, Login and Logout
Refer to Figure 2(c) (i) and (ii) for the user interfaces for Register and Login
respectively. For this question part, you will need to define the User class in Figure
Q2(b).
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 9 of 19
Create the admin user (email: admin@abc.com, password 12345 and name Admin)
if the user collection is empty. You can create the admin user either via Compass
or through some application code. There is no need to include other details for
admin user such as ID dob, handicapped and deli sets.
Similar to the Staycation case study, a participant (non-admin user) needs to be
authenticated before he can use certain functions of the application. Therefore, he
must register for an account. Upon successful registration, he will be directed to a
login page with a flashed message displayed using Bootstrap alert as shown in
Figure 2(c) (iii).
Handle unsuccessful registration and login in the same manner as the Staycation
case study. Any user who successfully logs in will be directed to the Deli page.
To exit from the application, the user selects log out. After a user has logged out,
the application should display the About page. The log out functionality is available
on the top panel only after a successful login as shown in Figure Q2c (iv).
You may copy the relevant code in the Staycation case study for the register, login
and logout functions to your application and make changes to achieve the new
effects. Explain your modification.
Register a participant (email peter@gmail.com, password 12345, name Peter Oh,
ID S1234567C, dob 1 Jun 1950, handicapped) and test that your functions are
working correctly.
Figure Q2(c) (i)
Figure Q2(c) (ii)
Figure Q2(c) (iii)
Figure Q2(c) (iv)
(9 marks)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 10 of 19
Question 3 (24 marks)
Learning objectives:
• Apply programming methods to present information in HTML
• Employ web programming framework for developing website
This question focuses on the non-admin set functions: create delisets, order deliset and view
orders. For this question, you must define the DeliSet and Order classes in Figure Q2(b). Ensure
that the User class has been defined according to the class diagram in Figure Q2(b).
(a) Create DeliSet
The participant provides a name for the new deli set to be created. He can select
the delis he wishes to add, and then click on the button to add the delis to the set.
Figure Q3(a)(i) shows the top of the page for Create DeliSet and Figure Q3(a)(ii)
shows the bottom of the page.
Figure Q3(a) (i) Top of Create DeliSet page with provided input
Figure Q3(a) (ii) Bottom of Create DeliSet page with provided input
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 11 of 19
The price of the deli set is the sum of each selected deli. The total fats and total
calories are similarly computed. The consume in hours for a deli set is the minimum
of the expiryHours attribute of delis in the deli set. The name of a deli set must
have a different name from the names of a participant’s existing deli sets. Provide
the necessary instruction as shown in Figure Q3(a) (iii).
Figure Q3(a) (iii) Create DeliSet page with instruction
Flash appropriate messages such as
• Please use a different deli set name
Deli set name checks are case-insensitive. Therefore, My FAV lunch is
considered same as My Fav Lunch.
• Please select at least one deli
A deli set must have at least one selected Deli which is added to a newly
created deli set. Subsequent selected delis should be added one at a time to
the newly-created deli set.
• Deli set inputName created with the selected delis: deliCode1, …,
delicoden
The message is flashed if the deliset is successfully created and added to
the dictionary of deli sets for the participant. Use the deli set name as key
and Deliset object as value.
Flash the appropriate message when the button is clicked, and return to the same
page. An example is shown in Figure Q3(a) (iv).
Figure Q3(a) (iv) Create DeliSet page with flashed message
(14 marks)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 12 of 19
(b)
(i) Order DeliSet
When a participant has not created a deli set, he cannot place any order. Therefore,
clicking on the hyperlink Order DeliSet shows a page as shown in Figure Q3(b) (i).
Figure Q3(b) (i) Order DeliSet page when participant has no deli set
If the participant has created deli sets, they are listed in alphabetical order, case
insensitive. The participant provides a delivery datetime for a selected deli set and
click on the corresponding button to place order.
Check that the same deli set must not have been ordered yet to be delivered at the
same time. Flash an appropriate message when the button is clicked, and return to
the same page. The two appropriate messages are as follows:
• Order deliset delisetName placed for deliveryDateTime
• Order failed. Deliset delisetName has already been placed for
deliveryDateTime
An example is shown in Figure Q3(b) (ii).
Figure Q3(b) (ii) Order DeliSet page with flashed message
(ii) View Orders
When a participant has not placed any order, clicking on the hyperlink Order
DeliSet shows a page as shown in Figure Q3(b) (iii).
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 13 of 19
Figure Q3(b) (iii) View Order page when participant has no order
If the participant has placed some orders, they are listed in chronological order,
starting from the later datetime, shown in Figure Q3b(iv). Delivery charge is
waived for participants who are at least 75 years of age on the year the order is
made or are handicapped at the time of order.
Figure Q3(b) (iv) View Order page when participant has orders
(10 marks)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 14 of 19
Question 4 (15 marks)
Learning objectives:
• Employ web programming framework for developing website
Figure Q4 (i) shows the Upload page. The Upload function is available to only the admin user.
To access the function, the admin user must log in. The Deli page will show up, and then, he
must click on the Upload link on the sidebar. Note that the admin user need not register himself.
Figure Q4 (i) Upload Page
Once a data type and a file are chosen, the admin user clicks on Upload to activate the upload
of data to the backend to be stored in Mongodb.
Data type Fields, example and messages
Participant ID,name,dob,handicapped,email
S4428006Z,Tan Yan Meng,19480708,False,tanym@gmail.com
Flash message when a participant’s email is already in database:
• Participant with email someEmail already exists
Deli #cold deli
deliCode,name,price,fat,carbohydrates,protein,storageTemperature,url
C001,Smoked Duck Salad,3.0,12.5,23,15,16,https://picniclifestyle.com/wpcontent/uploads/2020/10/Grilled-pear-salad-6.jpg
#hot deli
deliCode,name,price,fat,carbohydrates,protein,cookingStyle,url
H001,Croissant,2.0,15,26.7,4.6,Baking,https://3.bp.blogspot.com/-
HMLcbz567qg/TlgWSbpD1uI/AAAAAAAACgM/1xnYGFTZemE/s1600/croissant.JPG
Flash message when a delicode is already in database:
• Deli someDeliCode already exists!
Order #Order
email,deliveryDateTime,name,deliList
wongyh@gmail.com,2024-01-04 09:00,My Breakfast,H001,C001,H008
peter@gmail.com,2024-01-04 09:00,My fav lunch
Flash messages:
• Participant with email someEmail has not registered!
when participant in data line with email not registered in the application.
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 15 of 19
• Order for same deliset someDeliSetName, delivery datetime
someDeliveryDateTime by participant with email someEmail already
exists
when the data line is for an existing order, that is, for the same participant,
the same deli set and the same delivery time.
• deliset someDeliSetName does not exist and cannot be created without
delicode
when a deli set does not exist yet and there is no deli code in the data line.
Note that if the data line contains deli code, then a deli set can be created
for a participant, and an order is then placed.
However, if a deli set already exists for a participant, it is not necessary for
a data line to list the deli codes in the deli set. If there are deli codes are in
the data line for an existing deli set, the deli codes are ignored. That is,
there is no need to update the existing deli set with the deli codes in the
data line.
Flash the number of records created at the end of each file upload. Refer to Figure Q4 (ii) for
an example.
Figure Q4 (ii) Upload Page after an upload
Extend the flask application to allow admin user to upload data as described.
(15 marks)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 16 of 19
Appendix
all_delis = [{'code': 'C001', 'name': 'Smoked Duck Salad', 'price': 3.0, 'fat':
12.5, 'carbohydydrate': 23.0,
'protein': 15.0, 'styleOrTemp': '16',
'url': 'https://picniclifestyle.com/wp-content/uploads/2020/10/Grilled-pearsalad-6.jpg'},
{'code': 'C002', 'name': 'Strawberry Pudding', 'price': 2.0, 'fat': 0.3,
'carbohydydrate': 10.0,
'protein': 0.7, 'styleOrTemp': '3',
'url': 'https://veenaazmanov.com/wp-content/uploads/2014/05/Homemade-StrawberryPudding-15.jpg'},
{'code': 'C003', 'name': 'Chocolate Cake', 'price': 1.5, 'fat': 14.3,
'carbohydydrate': 50.7,
'protein': 5.0, 'styleOrTemp': '12',
'url': 'https://www.joannasteven.com/wp-content/uploads/2015/08/GFchocolatecake1024x1024.jpg'},
{'code': 'C004', 'name': 'Smoked Salmon', 'price': 2.4, 'fat': 3.7,
'carbohydydrate': 0.0,
'protein': 16.0, 'styleOrTemp': '3',
'url': 'https://goodtastefoods.co.uk/wp-content/uploads/2019/11/smokedsalmon_143296537-1.jpg'},
{'code': 'C005', 'name': 'Chilled Papaya Smoothie', 'price': 2.2, 'fat': 2.1,
'carbohydydrate': 21.3,
'protein': 7.0, 'styleOrTemp': '8',
'url': 'https://insanelygoodrecipes.com/wp-content/uploads/2022/09/HealthyPapaya-Smoothie-with-Oat-Flakes-and-Cinnamon-683x1024.jpg'},
{'code': 'C006', 'name': 'Berry Yoghurt Surprise', 'price': 2.2, 'fat': 1.0,
'carbohydydrate': 9.2,
'protein': 3.0, 'styleOrTemp': '3',
'url': 'https://www.pcrm.org/sites/default/files/berries-nondairy-yogurt.jpg'},
{'code': 'C007', 'name': 'Beetroot Raita', 'price': 2.0, 'fat': 1.0,
'carbohydydrate': 12.4,
'protein': 3.5, 'styleOrTemp': '8',
'url': 'https://werecipes.com/app/uploads/2015/04/dahi-raita-beetroot-raitarecipe.jpg'},
{'code': 'H001', 'name': 'Croissant', 'price': 2.0, 'fat': 15.0,
'carbohydydrate': 26.7,
'protein': 4.6, 'styleOrTemp': 'Baking',
'url': 'https://3.bp.blogspot.com/-
HMLcbz567qg/TlgWSbpD1uI/AAAAAAAACgM/1xnYGFTZemE/s1600/croissant.JPG'},
{'code': 'H002', 'name': 'Chicken Pie', 'price': 2.8, 'fat': 21.3,
'carbohydydrate': 32.0,
'protein': 10.0, 'styleOrTemp': 'Baking',
'url': 'https://img.taste.com.au/94eodL4O/taste/2016/11/creamy-chicken-andleek-pies-80359-1.jpeg'},
{'code': 'H003', 'name': 'Roast Beef', 'price': 3.5, 'fat': 21.8,
'carbohydydrate': 0.0,
'protein': 19.6, 'styleOrTemp': 'Roasting',
'url': 'https://i2.wp.com/www.domesticate-me.com/wp-content/uploads/2013/12/slowroasted-beef-tenderloin-with-rosemary-13.jpg'},
{'code': 'H004', 'name': 'Asparagus & Poached Egg', 'price': 3.0, 'fat': 4.9,
'carbohydydrate': 3.1, 'protein': 7.9, 'styleOrTemp': 'Boiled',
'url': 'https://www.healthbenefitstimes.com/recipe/wpcontent/uploads/2018/07/Roasted-Asparagus-with-Poached-Eggs-and-HollandaiseRecipe.gif'},
{'code': 'H005', 'name': 'Apple Sesame Tart', 'price': 1.8, 'fat': 7.5,
'carbohydydrate': 49.1,
'protein': 4.9, 'styleOrTemp': 'Baking',
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 17 of 19
'url':
'https://i.pinimg.com/736x/fc/22/c0/fc22c0106471cd2939ca371bfc80c38e.jpg'},
{'code': 'H006', 'name': 'Beef & Brown Rice Spicy Soup', 'price': 3.2, 'fat':
6.35,
'carbohydydrate': 17.7, 'protein': 18.0, 'styleOrTemp': 'Boiled',
'url':
'https://i.pinimg.com/originals/f6/78/41/f678414dccf92a0af0a8f09e3572caa1.jpg'},
{'code': 'H007', 'name': 'Fish & Potato Pie', 'price': 3.0, 'fat': 5.5,
'carbohydydrate': 15.0,
'protein': 16.5, 'styleOrTemp': 'Baking',
'url': 'https://www.sprinklesandsprouts.com/wp-content/uploads/2019/10/Fish-Pie4.jpg'},
{'code': 'H008', 'name': 'Banana Pancakes', 'price': 2.0, 'fat': 7.0,
'carbohydydrate': 20.0,
'protein': 3.6, 'styleOrTemp': 'Pan-Fried',
'url': 'https://3.bp.blogspot.com/-
BTNuMoVzv3Y/Vkq1QEgta_I/AAAAAAAANdY/19_4zLnWfcc/s1600/Buttermilk%2BBanana%2BPancak
es%2Brecipe.jpg'},
{'code': 'H009', 'name': 'Boiled Banana with Grated Coconut', 'price': 2.0, 'fat':
2.2,
'carbohydydrate': 30.7, 'protein': 2.0, 'styleOrTemp': 'Boiled',
'url': 'https://thumbs.dreamstime.com/b/boiled-slice-banana-eat-coconut-fooddiet-154458927.jpg'},
{'code': 'H010', 'name': 'Buckwheat Pancakes', 'price': 2.4, 'fat': 6.0,
'carbohydydrate': 39.0,
'protein': 7.0, 'styleOrTemp': 'Pan-Fried',
'url': 'https://bakeitpaleo.com/wp-content/uploads/2021/05/paleo-buckwheatpancake-recipe.jpg'},
{'code': 'H011', 'name': 'Chicken with Brown Rice', 'price': 3.0, 'fat': 5.8,
'carbohydydrate': 48.3,
'protein': 15.0, 'styleOrTemp': 'Steaming',
'url': 'https://dinnerthendessert.com/wp-content/uploads/2019/05/Baked-Chickenand-Rice.jpg'},
{'code': 'H012', 'name': 'Carrot & Coriander Soup', 'price': 2.0, 'fat': 2.6,
'carbohydydrate': 13.8,
'protein': 1.6, 'styleOrTemp': 'Boiled',
'url': 'https://i1.wp.com/cookingwithbry.com/wp-content/uploads/2019/11/CarotCoriander-Soup-Recipe-17.jpg'},
{'code': 'H013', 'name': 'Beancurd With Bean Sauce', 'price': 2.5, 'fat': 3.3,
'carbohydydrate': 6.8,
'protein': 10.2, 'styleOrTemp': 'Steaming',
'url': 'https://www.pekinghouse.co.nz/wp-content/uploads/2015/10/DeepFriedBeanCurdinChiliBeanSauce-600x600.jpg'}]
from abc import ABC, abstractmethod
class Deli(ABC):
_STANDARD_EXPIRY = 2
delis = {}
def __init__(self, deliCode, name, price, fat, carbohydrates, protein, url):
self.deliCode = deliCode
self.name = name
self.price = price
self.fat = fat
self.carbohydrates = carbohydrates
self.protein = protein
self.url = url
@property
def calories(self):
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 18 of 19
return self.fat * 9 + self.carbohydrates * 4 + self.protein * 4
@abstractmethod
def expiryHours(self):
return type(self)._STANDARD_EXPIRY
def __str__(self):
return f"{self.deliCode:4s} - {self.name:35s} Price:
${self.price:.2f} Fat: {self.fat:>4.1f} Calories: {self.calories:>5.1f}"
@classmethod
def getAllDelis(cls):
if not cls.delis:
for dataDict in all_delis:
if dataDict['code'].startswith('H'):
deli = HotDeli(dataDict['code'], dataDict['name'],
dataDict['price'], dataDict['fat'], dataDict['carbohydydrate'],
dataDict['protein'], dataDict['styleOrTemp'], dataDict['url'])
else:
deli = ColdDeli(dataDict['code'], dataDict['name'],
dataDict['price'], dataDict['fat'], dataDict['carbohydydrate'],
dataDict['protein'], int(dataDict['styleOrTemp']), dataDict['url'])
cls.delis[dataDict['code']] = deli
return cls.delis.values()
@classmethod
def getDeliType(cls, deliType):
if not deliType: return []
return [d for d in cls.getAllDelis() if
d.deliCode.startswith(deliType[0].upper())]
@classmethod
def getDeli(cls, code):
return cls.getAllDelis().get(code)
class ColdDeli(Deli):
def __init__(self, deliCode, name, price, fat, carbohydrates, protein,
storageTemperature, url):
super().__init__(deliCode, name, price, fat, carbohydrates, protein, url)
self.storageTemperature = storageTemperature
def expiryHours(self):
if self.storageTemperature <= 10:
return 0.5
elif self.storageTemperature <= 15:
return 1
elif self.storageTemperature <= 20:
return 1.5
else:
return super().expiryHours()
class HotDeli(Deli):
_COOKING_STYLE_EXPIRY = {"Steaming":1, "Frying":3, "Grilling":1.8,
"Roasting":1.5}
def __init__(self, deliCode, name, price, fat, carbohydrates, protein,
cookingStyle, url):
super().__init__(deliCode, name, price, fat, carbohydrates, protein, url)
SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) TMA – Page 19 of 19
self.cookingStyle = cookingStyle
def expiryHours(self):
return type(self)._COOKING_STYLE_EXPIRY.get(self.cookingStyle,
type(self)._STANDARD_EXPIRY)
---- END OF ASSIGNMENT ----