Yana P

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "printWidth": 80,
+  "tabWidth": 2
+}

finance-tracker/app.js

@@ -1,3 +1,60 @@
 // This is the entrypoint for your application.
 // node app.js
+import {
+  addTransaction,
+  calculateAverageExpensesPerCategory,
+  findConsecutiveExpensiveMonth,
+  getTransactionsByCategory,
+  groupTransactionByMonth,
+  printGeneralReport,
+  removeTransactions,
+  searchTransactionsByDateRange,
+} from './finance.js';
+import transactions from './data.js';
 
+const newTransaction = addTransaction(
+  'expense',
+  'groceries',
+  98,
+  'Weekly supermarket shopping',
+  '2026-01-25'
+);
+
+const transactionByCategory = getTransactionsByCategory(
+  transactions,
+  'groceries'
+);
+
+const financeReport = printGeneralReport(transactions);
+
+console.log(newTransaction, transactionByCategory, financeReport);
+
+//Bonus Challenges output
+const transactionsByDateRange = searchTransactionsByDateRange(
+  transactions,
+  '2025-01-22',
+  '2025-02-24'
+);
+
+// Node.js collapses nested objects inside arrays and prints them as [Object]. To see the full structure, I use JSON.stringify(). The second argument (null)means no custom replacer, and the third argument (2) adds indentation for readability.
+
+const transactionsGroupByMonth = JSON.stringify(
+  groupTransactionByMonth(transactions),
+  null,
+  2
+);
+
+const averageExpensesPerCategory =
+  calculateAverageExpensesPerCategory(transactions);
+
+const arrayWithoutRemoveTransaction = removeTransactions(transactions, 3);
+
+const consecutiveExpensiveMonths = findConsecutiveExpensiveMonth(transactions);
+
+console.log(
+  transactionsByDateRange,
+  transactionsGroupByMonth,
+  averageExpensesPerCategory,
+  arrayWithoutRemoveTransaction,
+  consecutiveExpensiveMonths
+);

finance-tracker/data.js

@@ -1,2 +1,205 @@
 // Place here the transaction data array. Use it in your application as needed.
-const transactions = [];
+const transactions = [
+  {
+    id: 1,
+    type: 'income',
+    category: 'salary',
+    amount: 3000,
+    description: 'Monthly salary',
+    date: '2025-01-15',
+  },
+  {
+    id: 2,
+    type: 'expense',
+    category: 'groceries',
+    amount: 120,
+    description: 'Weekly supermarket shopping',
+    date: '2025-01-16',
+  },
+  {
+    id: 3,
+    type: 'expense',
+    category: 'transport',
+    amount: 45,
+    description: 'Monthly public transport pass',
+    date: '2025-01-17',
+  },
+  {
+    id: 4,
+    type: 'income',
+    category: 'freelance',
+    amount: 600,
+    description: 'Freelance web project',
+    date: '2025-01-20',
+  },
+  {
+    id: 5,
+    type: 'expense',
+    category: 'entertainment',
+    amount: 75,
+    description: 'Concert tickets',
+    date: '2025-01-21',
+  },
+  {
+    id: 6,
+    type: 'expense',
+    category: 'utilities',
+    amount: 150,
+    description: 'Electricity and water bill',
+    date: '2025-01-22',
+  },
+  {
+    id: 7,
+    type: 'income',
+    category: 'gift',
+    amount: 200,
+    description: 'Birthday gift from family',
+    date: '2025-01-23',
+  },
+  {
+    id: 8,
+    type: 'expense',
+    category: 'health',
+    amount: 90,
+    description: 'Doctor appointment',
+    date: '2025-02-24',
+  },
+  {
+    id: 9,
+    type: 'expense',
+    category: 'education',
+    amount: 300,
+    description: 'Online course fee',
+    date: '2025-03-15',
+  },
+  {
+    id: 10,
+    type: 'expense',
+    category: 'education',
+    amount: 135,
+    description: 'Online course fee',
+    date: '2025-03-25',
+  },
+  {
+    id: 11,
+    type: 'expense',
+    category: 'groceries',
+    amount: 95,
+    description: 'Weekly supermarket shopping',
+    date: '2025-02-02',
+  },
+  {
+    id: 12,
+    type: 'expense',
+    category: 'transport',
+    amount: 45,
+    description: 'Monthly public transport pass',
+    date: '2025-02-10',
+  },
+  {
+    id: 13,
+    type: 'income',
+    category: 'salary',
+    amount: 3000,
+    description: 'Monthly salary',
+    date: '2025-02-15',
+  },
+  {
+    id: 14,
+    type: 'expense',
+    category: 'entertainment',
+    amount: 60,
+    description: 'Cinema tickets',
+    date: '2025-02-18',
+  },
+  {
+    id: 15,
+    type: 'expense',
+    category: 'utilities',
+    amount: 155,
+    description: 'Electricity and water bill',
+    date: '2025-02-22',
+  },
+  {
+    id: 16,
+    type: 'income',
+    category: 'freelance',
+    amount: 400,
+    description: 'Small freelance task',
+    date: '2025-03-05',
+  },
+  {
+    id: 17,
+    type: 'expense',
+    category: 'health',
+    amount: 120,
+    description: 'Pharmacy purchase',
+    date: '2025-03-12',
+  },
+  {
+    id: 18,
+    type: 'expense',
+    category: 'groceries',
+    amount: 130,
+    description: 'Weekly supermarket shopping',
+    date: '2025-03-20',
+  },
+  {
+    id: 19,
+    type: 'expense',
+    category: 'transport',
+    amount: 50,
+    description: 'Taxi ride',
+    date: '2025-03-28',
+  },
+  {
+    id: 20,
+    type: 'income',
+    category: 'bonus',
+    amount: 500,
+    description: 'Quarterly bonus',
+    date: '2025-04-01',
+  },
+  {
+    id: 21,
+    type: 'expense',
+    category: 'education',
+    amount: 200,
+    description: 'Books and materials',
+    date: '2025-04-03',
+  },
+  {
+    id: 22,
+    type: 'expense',
+    category: 'entertainment',
+    amount: 90,
+    description: 'Theatre tickets',
+    date: '2025-04-10',
+  },
+  {
+    id: 23,
+    type: 'expense',
+    category: 'utilities',
+    amount: 160,
+    description: 'Electricity and water bill',
+    date: '2025-04-15',
+  },
+  {
+    id: 24,
+    type: 'expense',
+    category: 'health',
+    amount: 80,
+    description: 'Dentist visit',
+    date: '2025-04-20',
+  },
+  {
+    id: 25,
+    type: 'income',
+    category: 'salary',
+    amount: 3100,
+    description: 'Monthly salary',
+    date: '2025-03-15',
+  },
+];
+
+export default transactions;