Text$-$based User Interface:

When your program first runs, it will ask the user to log in by providing a user name and

password as follows. In your code, at least, the following users should be already defined with

user name $$ahmet$$ and password $1234,$ and $$zeynep$$ with password $4444.$ You will have

one administrator account with name $$admin$$ and password $$qwerty$$ You may define

additional users if you like.

$1$

$****$Welcome to Medipol Online Market$****$

Please log in by providing your user credentials:

User Name:

If the user enters invalid credentials, the program should ask the user to try again. The

user successfully logs in when the provided credentials are valid, if the user enters invalid

credentials for the same user $3$ time in row, the account will be blocked and the user will not

be allowed to login$.$ The program will warn the user in such a case. The following shows

the interface for the initial login screen with a scenario where the user first enters incorrect

credentials, and then successfully logs in during the second trial.

$****$Welcome to Medipol Online Market$****$

Please log in by providing your user credentials:

User Name: ahmet

Password: $123$

Your user name and$/$or password is not correct. Please try again!

User Name: ahmet

Password: $1234$

Successfully logged in$!$

The following shows the interface for the initial login screen again with a scenario where the

user enters $3$ incorrect credentials, and then a warning message will be shown. $($Note: Even

if the user tries to log in later, their account should remain blocked$)$

$****$Welcome to Medipol Online Market$****$

Please log in by providing your user credentials:

$2$

User Name: ahmet

Password: $123$

Your user name and$/$or password is not correct. Please try again!

User Name: ahmet

Password: $132$

Your user name and$/$or password is not correct. Please try again!

User Name: ahmet

Password: $132$

Your user name and$/$or password is not correct.

Your account has been blocked. please contact the administrator.

Once the user enters valid credentials, your program should greet the user with the following

message, and provide a menu of the options to do$.$ User will do a selection by entering the

corresponding menu number, and accordingly different information will be shown and$/$or

requested.

Welcome, ahmet! Please choose one of the following options by entering the corresponding

menu number.

Please choose one of the following services:

$1.$ Search for a product

$2.$ See Basket

$3.$ Check Out

$4.$ Logout

$5.$ Exit

Your Choice

If the user enters an invalid menu entry, the program should warn the user to provide a valid

menu number

When main menu item $1$ is chosen, the user will be asked to provide search term$($s$).$ Then,

your program will display a list of all items from inventory whose name includes the user$-$

$3$

provided search term$($s$),$ and whose stock amount is greater than $0.$ For instance, when the

user searches for $$Juice$,$ the program should display all items whose name includes $$juice$$

and available in the stocks as follows. Product name checking should be case insensitive

$($i$.$e$.,$ you should not differentiate between lower and upper case letters$).$

Please choose one of the following Services:

$1.$ Search for a product

$2.$ See Basket

$3.$ Check Out

$4.$ Logout

$5.$ Exit

Your Choice: $1$

What are you searching for? Juice

found $3$ similar items:

$1.$grape juice $9$$

$2.$orange juice $9$$

$3.$apple juice $9$$

Please select which item you want to add to your basket $($Enter $0$ for main menu$)$:

Note that each matching item is assigned a number, and the program asks the customer to

enter the number corresponding to a product to add to his$/$her basket. A customer may

cancel the current search session and go back to main menu by entering $0$ at this stage. Once

the customer chooses a product to add to the basket, the program will ask for the amount.

If the requested amount is not exceeding the stock amount of the selected product in the

inventory, the product should be added to the basket, and the customer should be notified

about it$,$ and then the main menu should be displayed.

Please select which item you want to add to your basket $($Enter $0$ for main menu$)$: $3$

$4$

Adding apple juice. Enter Amount: $2$

Added apple juice into your Basket.

Going back to main menu...

Please choose one of the following services:

$1.$ Search for a product

$2.$ See basket

$3.$ Check out

$4.$ Logout

$5.$ Exit

Your Choice:

If the requested amount is over the stock amount, then the program should ask the user to

provide another amount $($or Enter $0$ to go back to main menu$).$

Please select which item you want to add to your basket $($Enter $0$ for main menu$)$: $1$

Adding grape juice. Enter Amount: $1000$

Sorry! The amount exceeds the limit$,$ Please try again with smaller amount

Amount $($Enter $0$ for main menu$)$:

If the search result is empty, the user will be requested to provide another search term $($or$,$

the user may go back to main menu by entering $0).$

What are you searching for? Lemon