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SalesReport.java
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SalesReport.java
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import java.util.*;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
/**
* Represents a sales report in the restaurant.
* @author Tan Zheng Kai
* @version 11.0
* @since 2021-11-13
*/
public class SalesReport {
/**
* The start date of this Sales Report.
*/
private LocalDate startDate;
/**
* The end date of this Sales Report.
*/
private LocalDate endDate;
/**
* The end date of this Sales Report.
*/
private ArrayList<Invoice> invoiceList;
/**
* The total revenue of this Sales Report.
*/
private double totalRevenue;
/**
* The list of Sale Items in this Sales Report.
*/
private ArrayList<SaleItem> saleItemList;
/**
* Creates a Sales Report based on user inputs.
* Date taken it must match format required.
*/
public SalesReport(){
Scanner sc = new Scanner(System.in);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d/MM/yyyy");
System.out.println("Start Date of Report: (d/MM/yyyy)\n");
String date = sc.nextLine();
//convert String to LocalDate
try {
LocalDate startDate = LocalDate.parse(date, formatter);
this.startDate = startDate;
} catch (DateTimeParseException e) {
System.out.println("Please follow the correct format for inputting of date!");
System.out.println("program exiting...");
System.exit(0);
}
System.out.println("End Date of Report: (d/MM/yyyy)\n");
String date1 = sc.nextLine();
try {
LocalDate endDate = LocalDate.parse(date1, formatter);
this.endDate = endDate;
} catch (DateTimeParseException e) {
System.out.println("Please follow the correct format for inputting of date!");
System.out.println("program exiting...");
System.exit(0);
}
this.invoiceList = RestaurantApp.globalInvoiceManager.getInvoiceList();
this.invoiceList = selectRelevantInvoice();
this.saleItemList = generateSaleItemList();
this.totalRevenue = generateRevenue();
}
/**
* Filter invoices that fall within the requested time frames.
* Time frame is measured by the start and end date.
* @return the list of invoices which fall within the requested time frame.
*/
public ArrayList<Invoice> selectRelevantInvoice() {
//find array size and then loop thru
if (invoiceList.isEmpty()){
System.out.println("No Invoices are present");
return null;
}
int arrSize = invoiceList.size();
ArrayList<Invoice> returnList = new ArrayList<Invoice>();
for (int i = 0; i < arrSize; i++) {
//check if the current invoice fits requirement which is in start and end date
if ((invoiceList.get(i).getOrderDetails().getDate().isAfter(startDate) || invoiceList.get(i).getOrderDetails().getDate().equals(startDate)) && (invoiceList.get(i).getOrderDetails().getDate().isBefore(endDate)||invoiceList.get(i).getOrderDetails().getDate().equals(endDate))) {
//then add it into new returnList
returnList.add(invoiceList.get(i));
}
}
return returnList;
}
/**
* Generates a list of order items purchased within the timeframe.
* @return the list of sale items with their quantities sold throughout
* timeframe according to the attributes start date and end date.
*/
public ArrayList<SaleItem> generateSaleItemList() {
if (invoiceList == null) {
System.out.println("No Invoices are present");
return null;
}
int invListSize = invoiceList.size();
ArrayList<SaleItem> returnList = new ArrayList<SaleItem>();
ArrayList<OrderItem> orderItemList= new ArrayList<OrderItem>();
boolean finishedForLoop = true;
//traverse thru the list of invoice
for (int indexOfList = 0; indexOfList < invListSize; indexOfList++) {
//within each invoice, traverse thru all items
//find the orderitemlist for this invoice
orderItemList = invoiceList.get(indexOfList).getOrderDetails().getOrder().getOrderItemList();
if (orderItemList.isEmpty()){
System.out.println("Empty InvoiceList");
return null;
}
for (int indexOfOrderItem = 0 ; indexOfOrderItem < orderItemList.size(); indexOfOrderItem++) {
//while traversing items, check if it is within saleitem list
//if it is, add to quantity, if isnt then add to saleitem list
finishedForLoop = true;
for (int indexOfSaleItem = 0; indexOfSaleItem < returnList.size(); indexOfSaleItem++) {
if (orderItemList.get(indexOfOrderItem).getMenuItem().getName() == returnList.get(indexOfSaleItem).getOrderItem().getMenuItem().getName()) {//check if equal
returnList.get(indexOfSaleItem).incrementQuantity(orderItemList.get(indexOfOrderItem).getQuantity()); //increment by amt in orderitem
finishedForLoop = false;
break;
}
}
if (finishedForLoop == true){ //add new saleitem to returnlist
SaleItem toBeAdded = new SaleItem(orderItemList.get(indexOfOrderItem) , orderItemList.get(indexOfOrderItem).getQuantity());
toBeAdded.getOrderItem();
returnList.add(toBeAdded);
}
}
}
return returnList;
}
/**
* Generates total revenue in a specific timeframe
*
* @return revenue earned from the timeframe
*/
public double generateRevenue() {
//initialise revenue variable
double revenue = 0;
if (saleItemList.isEmpty()){
System.out.println("No sale items currently");
return 0;
}
for (int indexOfSaleItemList = 0 ; indexOfSaleItemList < saleItemList.size() ; indexOfSaleItemList++) {
revenue += (saleItemList.get(indexOfSaleItemList).getOrderItem().getMenuItem().getPrice() * saleItemList.get(indexOfSaleItemList).getQuantity());
}
return revenue;
}
/**
* Prints the Sales Report for a specific time frame.
*/
public void printSalesReport(){
System.out.println("=====================================");
String result = "Sales Report: " + this.startDate + " - " + this.endDate;
System.out.println(result); //print heading
if (saleItemList != null){
for (int index=0; index < this.saleItemList.size(); index++) {
result = this.saleItemList.get(index).getOrderItem().getMenuItem().getName() + " - " + this.saleItemList.get(index).getQuantity();
System.out.println(result);
}
}
else{
System.out.println("No salesItem in salesItemList/n");
return;
}
System.out.println();
System.out.printf("Total Revenue for above timeframe: $%.2f",this.totalRevenue);
System.out.println();
System.out.println("=====================================");
System.out.println("\n");
}
}