Implement feature: Delete transaction by index id

src/main/java/BudgetBuddy.java

@@ -1,4 +1,5 @@
 import financemanager.TransactionList;
+import ui.UserInterface;
 
 import java.util.Scanner;
 
@@ -21,19 +22,26 @@ public static void main(String[] args){
 
         while (isRunning) {
             String input = in.nextLine();
-
-            switch (input.split(" ")[0]) {
-            case "bye":
-                System.out.println("Goodbye!");
-                isRunning = false;
-                break;
-            case "list":
-                System.out.println("Displaying transactions:");
-                System.out.println(transactions.getTransactions());
-                break;
-            default:
-                System.out.println("Invalid command.");
+            try{
+                switch (input.split(" ")[0]) {
+                case "bye":
+                    System.out.println("Goodbye!");
+                    isRunning = false;
+                    break;
+                case "list":
+                    System.out.println("Displaying transactions:");
+                    System.out.println(transactions.getTransactions());
+                    break;
+                case "delete":
+                    transactions.removeTransaction(input);
+                    break;
+                default:
+                    System.out.println("Invalid command.");
+                }
+            } catch(IndexOutOfBoundsException e){
+                UserInterface.printIndexOutOfBounds(e.getMessage());
             }
+
         }
 
 

src/main/java/financemanager/TransactionList.java

@@ -1,12 +1,18 @@
 package financemanager;
 
+import parser.Parser;
 import transactions.Transaction;
 
 import java.util.ArrayList;
+import ui.UserInterface;
 
 public class TransactionList {
 
     private ArrayList<Transaction> transactions;
+    public static final int DELETE_BEGIN_INDEX = 7;
+    public static final int INDEX_OFFSET = 1;
+    public static final int LOWER_BOUND = 0;
+
 
     public TransactionList() {
         // Initialise ArrayList in the constructor
@@ -17,4 +23,17 @@ public ArrayList<Transaction> getTransactions() {
         return transactions;
     }
 
+    public void removeTransaction(String input){
+        int id = Integer.parseInt(input.substring(DELETE_BEGIN_INDEX).trim()) - INDEX_OFFSET;
+        int size = transactions.size();
+        if (id >= LOWER_BOUND && id < size) {
+            String itemRemoved = transactions.get(id).toString();
+            transactions.remove(id);
+            UserInterface.printDeleteMessage(itemRemoved);
+        } else {
+            throw new IndexOutOfBoundsException(size);
+        }
+    }
+
+
 }

src/main/java/transactions/Transaction.java

@@ -22,4 +22,11 @@ public float getAmount() {
     public String getCategory() {
         return category;
     }
+
+    @Override
+    public String toString() {
+        return  (" Description: " + getDescription() + " | " +
+                " Amount: " + getAmount() + " | " +
+                " Category: " + getCategory()) ;
+    }
 }