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Student Name: Weight: $20\%$

Student ID: Marks: $/100$

Assignment: Abstract Classes, Event$-$Driven Applications

and Exception Handling

Scenario

A local travel agency, Traveless, has hired your company to implement a new flight reservation

management system to improve its productivity and services. After meeting with the agency,

you realize that to tackle this complex request, you must break down the solution to three major

parts:

$$ Front$-$end GUI

$$ Backend

$$ Functional front end connected to the backend

Equipment and Materials

For this assignment, you will need:

$$ Visual Studio IDE

$$ Supplied data files:

o flights.csv

o airports.csv

Instructions

$1.$ Review the scenario, and then carefully read the Traveless program Details and

Program Guidelines sections of this document.

$2.$ Working outside of class time, complete the submission sections of this assignment.

$3.$ Review the grading criteria for the group submissions.

$4.$ See the course schedule and$/$or Brightspace for due dates.

Submission

$1.$ Create the code for a program that meets the requirements described bellow.

$2.$ Test your code against the expected output provided.

$3.$ Check your program against the detailed marking criteria at the end of this document.

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$4.$ Submit the following to Brightspace as a group $($Only one copy is required per group,

and any of the group members may submit$)$:

$$ Github URL for your program code $($invite your instructor to be a member of the

project repository$)$

$$ A copy of the test output $(.$txt file$)$

Peer Assessment $(5\%)$

Each student must also complete a peer assessment of their group members. Your instructor

will provide further submission details.

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Program Details

Create a functional, event$-$driven program that manages the travel agency$$s data $($contained in

the provided data files$)$ and allows a user to do the following:

$$ Find flights:

o A travel agent can find a flight by providing the origin airport, the destination airport

and the day of the week the flight departs.

$$ Make a reservation:

o A travel agent can make a flight reservation for a traveller.

o A reservation code is generated and assigned to the traveller$$s name and

citizenship.

$$ Find reservations:

o A travel agent can find existing flight reservations using the reservation code, and$/$or

the airline and$/$or the traveller$$s name.

$$ Modify an existing reservation:

o A travel agent can update the traveller$$s name and citizenship.

o An existing flight reservation can be soft$-$deleted, marking it as inactive and freeing

up a seat on the flight.

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Detailed Requirements

When the graphical user interface is launched, the user can choose to either search flights and

make a reservation, or search for and modify a reservation.

Find Flights

The findFlights method receives as its input arguments: the originating airport, the destination

airport, and the day of week. The method returns a List of any matching Flight objects. If no

matches are found, the list control is empty.

Make Reservation

When a travel agent selects a flight from the list, the text fields are populated with the selected

flight code, airline, day, time and cost. The travel agent enters the traveller$$s full name and

citizenship. The flight code, airline, day, time and cost cannot be edited. An error message is

displayed if:

$$ A reservation is to be made but no flight is selected

$$ The name field is empty

$$ The citizenship field is empty

The makeReservation method receives as its input arguments: a Flight object, the travelers

name and citizenship. An exception is thrown if the flight is completely booked, or the flight is

null, or the name is empty$/$null$,$ or the citizenship is empty$/$null$.$ If there are no exceptions thrown

a Reservation object is created, saved to the binary file and returned by the method.

Find Reservations

A travel agent can search for an existing reservation that contains the specified reservation

code, and$/$or airline and$/$or traveller$$s full name. The list is populated with any reservations that

are found. Each row in the list displays the code of the corresponding reservation record.

The findReservation method receives as its input arguments: reservation code, airline and$/$or

traveler$$s full name. The method returns a list of matching Reservation objects. If no matches

are found, the list control is empty. If the user doesn$$t enter any input, then all the reservations

are displayed in the list.

Update Reservation

When a reservation in the list generated by the findReservation method is selected, the

corresponding fields are populated, displaying the following information:

$$ Reservation code

$$ Flight code

$$ Airline name

$$ Cost

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$$ Name

$$ Citizens