SmartTransportationSystem.java

// Below is a single-file legacy Java program for a Smart Transportation Management System. It intentionally contains:

// Poor variable names
// Poor method names
// Long methods
// Duplicate code
// Mixed responsibilities
// Temporary variables
// Unclear naming
// Methods that should be extracted
// Methods and variables that should be renamed
// Logic that should be moved to separate classes

// The students' task is to apply Extract Method, Move Method, Rename Variable, and Rename Method refactorings
    public class SmartTransportationSystem {
    public void print(String name, String transport, int distance, String payment) {

        System.out.println("================================");
        System.out.println("Passenger Name: " + name);
        System.out.println("Vehicle Type: " + transport);
        System.out.println("Distance: " + distance);

        System.out.println("Base Fare: " + x);

        

        System.out.println("Sending SMS Notification...");
        System.out.println("Passenger " + name + ", your booking has been confirmed.");

        System.out.println("Saving Booking Record...");
        System.out.println("Passenger: " + name);
        System.out.println("Vehicle: " + transport);
        System.out.println("Distance: " + distance);
        System.out.println("Amount Paid: " + fFare);

        System.out.println("================================");
    }

    public void calculateTax(int x, int distance ){
           double tax = 0;

        if (distance > 100) {
            tax = x * 0.10;
        }
        else {
            tax = x * 0.05;
        }

        System.out.println("Tax: " + tax);

        
    }

    public void SpecialDiscount(int tax){
        double sDiscount = x + tax;

         if (n.equalsIgnoreCase("Ali")) {
            fFare = fFare - (fFare * 0.15);
            System.out.println("Special Discount Applied");
        }

        System.out.println("Final Fare: " + fFare);

    }

    public void calculateDistance(){
        double x = 0;

        if (transport.equals("BUS")) {
            x = d * 2;
        }
        else if (transport.equals("TAXI")) {
            x = d * 8;
        }
        else if (transport.equals("TRAIN")) {
            x = d * 4;
        }
        else {
            System.out.println("Invalid Vehicle");
            return;
        }
    }
    public void payment(){

        if (payment.equals("CARD")) {

            System.out.println("Processing Card Payment...");
            System.out.println("Verifying Card...");
            System.out.println("Deducting Amount...");
            System.out.println("Payment Successful");
        }
        else if (payment.equals("CASH")) {

            System.out.println("Receiving Cash...");
            System.out.println("Generating Receipt...");
            System.out.println("Payment Successful");
        }
        else if (payment.equals("ONLINE")) {

            System.out.println("Connecting Gateway...");
            System.out.println("Verifying Transaction...");
            System.out.println("Payment Successful");
        }
        else {
            System.out.println("Invalid Payment Method");
            return;
        }

    }
    }