import java.util.Calendar; import java.util.Scanner; import java.util.TimeZone;

private static final String[] LOCATIONS = {

"King's Cross", "Victoria", "Waterloo", "Euston", "Liverpool Street", "London Bridge", "Paddington", "Marylebone" }; private static final String[] PAYMENT_TYPES = { "cash", "credit card", "debit card", "bitcoin" }; private static final String[] TEMPLATE = { "%n****************************************%n* %s *%n****************************************%n%n", // + COMPANY_SLOGAN "Receipt - %s%n%n", // + receipt reference no "FixAll - %s%n%n", // + shop location "VAT No: %d%n%n", // + vat no "Served by: %s%n%n", // + staff member's first name (TODO and initial of surname?) "---------------------------------------------%nYour order:%n%n", "%s%n%n", // + costs breakdown "Subtotal\t\t\t\t%.2f%n", // + subtotal (TODO: make it a task to make the receipts capable of being in euros? [ie make the / in the receipt configurable] necessary because the Kings Cross branch is seeing lots of European business because of being next to St Pancras International) "Tax (VAT @ 20%%)\t\t\t\t%.2f%n%n", // + tax (TODO: should tax rate also be configurable? VAT may change post Brexit) "TOTAL : %d item%s\t\t\t\t%.2f%n%n", // + number of items, s or no s (single or plural), total amount payable "PAID (%s) :\t\t\t%.2f%n%n", // + payment type (credit card/debit card/cash/bitcoin/other crypto), amount paid "TO PAY :\t\t\t\t%.2f%n%n", // + amount left to pay "---------------------------------------------%n%n%n", //no additional info "Exchange and returns policy - %s%n%n", // + returns policy url "All repairs guaranteed for 18 months%nRepair T&Cs - %s%n%n%n", // + terms & conditions url "Rate our Service%n%s%n%n%n", // + 3rd party review site url "Get 20%% off your order when you refer a friend - see our web page for details%n%s%n%n", // + referral url "Follow us on %s%n" // + our social media channels };

public static void create() { in = new Scanner(System.in); dateAndTime = getDateAndTime(); shopLocation = getShopLocationFromUser(); staffName = getFromUser("your first name"); staffName = capitalise(staffName);

itemisedCosts = ""; numberOfItemsPurchased = 0; subtotal = 0; boolean keepGoing = true; //loop so that the user can enter as many items as they need to while (keepGoing) { //ask user to enter information about item and charges String itemDescription = getFromUser("Item or service user is being charged for"); //TODO client wants the item description in title case double unitPrice = getDoubleFromUser("the unit price (without VAT) of " + itemDescription); int numberOfUnits = getIntFromUser("the number of " + itemDescription); //TODO make above statements a method

//update receipt information with item and charges for item itemisedCosts += addItemisedCostToReceipt(itemDescription, unitPrice, numberOfUnits); subtotal += (unitPrice * numberOfUnits); numberOfItemsPurchased += numberOfUnits; //TODO make above three statements a method

//add more items to the receipt? String more = getFromUser("another item or service? Yes/No"); if (more.trim().toLowerCase().startsWith("n")) { keepGoing = false; } //TODO make asking the user if they wish to add more items into a method }//end of while loop vat = getVat(subtotal); //calculate total with vat total = addVat(subtotal); paid = getDoubleFromUser("amount paid as a deposit by the customer"); //TODO write a new method to get the deposit from the user. //enforce that the method will (1) give the user the minimum and //the maximum amount of the deposit (minimum is 20% of the total, //and maximum is the total); (2) The method will enforce that deposit //amounts that are too low or too high will be rejected, //and the user asked to enter another amount. The minimum deposit, //once calculated, should be rounded to the nearest int //(normal rounding applies), before being shown to the user. paymentMethod = getFromUser("deposit payment method"); //TODO validate this input. See PAYMENT_TYPES //all done with user input.

//clean up in.close(); calculateOutstandingBalance(); //print the formatted receipt printReceipt(); }

private static String getDateAndTime() { Calendar now = Calendar.getInstance(TimeZone.getTimeZone("Europe/London")); return String.format("%1$te/%

private static String getShopLocationFromUser() { System.out.println("SHOP LOCATIONS:"); for (int i = 0; i < LOCATIONS.length; i++) { System.out.println((i+1) + ") " + LOCATIONS[i]); } int choice = getIntFromUser("The number that corresponds to your shop"); return LOCATIONS[choice-1]; } private static String capitalise(String s) { if (s == null) return(""); s = s.trim(); if (s.length() < 2) return s.toUpperCase(); return s.substring(0,1).toUpperCase() + s.substring(1).toLowerCase(); } private static String addItemisedCostToReceipt(String itemDescription, double unitPrice, int numberOfUnits) { //format: numberOfUnits x itemDescription @ unitPrice each: (unitPrice*NumberOfUnits) return String.format("%d x %s @ %.2f each\t\t%.2f%n", numberOfUnits, itemDescription, unitPrice, unitPrice * numberOfUnits); }

private static void calculateOutstandingBalance() { outstandingBalance = total - paid; }

private static String getFromUser(String prompt) { System.out.print("Enter " + prompt + ": "); return in.nextLine(); }

private static int getIntFromUser(String prompt) { boolean keepGoing = true; int i = 0; while (keepGoing) { System.out.print("Enter " + prompt + ": "); i = in.nextInt();

in.nextLine(); //read the rest of the line that had the int. //without this, running getIntFromUser() followed by getFromUser() //would result in getFromUser() returning the rest of the line that the int was part of //(ie probably just a newline character)

if (i < 1) { //make sure the number is more than 0 System.out.println("Invalid number. Number must be greater than zero."); } else { keepGoing = false; } } return i; }

private static double getDoubleFromUser(String prompt) { boolean keepGoing = true; double i = 0;

while (keepGoing) { System.out.print(("Enter " + prompt + ": ")); i = in.nextDouble();

in.nextLine(); //read the rest of the line (probably just a newline character)

if (i <= 0) { System.out.println("Invalid number. Number must be greater than zero."); } else { keepGoing = false; } }

return i; }

private static void printReceipt() { String s = "";

for (int i = 0; i < TEMPLATE.length; i++) { s += String.format(TEMPLATE[i], getTemplateData(i)); }

/* TODO need to fix the tab spacing in the itemised costs and the other bits between the dashes (the costs breakdown etc) */ System.out.println(s); }

There are three more TODO comments in the user interaction loop in the create() method. These three comments reference turning each one of the three blocks of code in the loop (separated from each other by blank lines) into methods. Write these three methods. You should write a method to get user input for each item the customer is to pay for, a method to update the receipt with the user information about each item, and a method to ask the user if they wish to enter another item (goods or services). Once you have written your three methods, change the user interaction loop to have just three statements, each invoking one of the new methods that you have written. Once you have done this, your user interaction loop should be as follows: statement to invoke a method to ask the user for an item description and charging information for the item statement to invoke a method to update the receipt with the information just entered by the user about an item keepGoing = an invocation of a method that asks the user if there is another item to be charged for, records their response and returns an appropriate value