Atiqa N.

finance-tracker/.prettierrc

@@ -0,0 +1,6 @@
+{
+    "trailingComma": "es5",
+    "tabWidth": 4,
+    "semi": false,
+    "singleQuote": true
+}

finance-tracker/app.js

@@ -1,3 +1,25 @@
 // This is the entrypoint for your application.
 // node app.js
 
+import {
+    addTransaction,
+    printAllTransactions,
+    printSummary,
+} from './finance.js'
+
+const newTransaction = {
+    id: 6,
+    type: 'income',
+    category: 'freelance',
+    amount: 500,
+    description: 'Freelance project',
+    date: '2025-01-20',
+}
+
+addTransaction(newTransaction)
+
+// Display all transactions
+printAllTransactions()
+
+// Display financial summary
+printSummary()

finance-tracker/data.js

@@ -1,2 +1,45 @@
 // 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: 150,
+        description: 'Weekly groceries',
+        date: '2025-01-16',
+    },
+    {
+        id: 3,
+        type: 'expense',
+        category: 'utilities',
+        amount: 120,
+        description: 'Electricity bill',
+        date: '2025-01-17',
+    },
+    {
+        id: 4,
+        type: 'expense',
+        category: 'entertainment',
+        amount: 50,
+        description: 'Movie tickets',
+        date: '2025-01-18',
+    },
+    {
+        id: 5,
+        type: 'income',
+        category: 'freelance',
+        amount: 500,
+        description: 'Freelance project',
+        date: '2025-01-19',
+    },
+]
+
+export default transactions

finance-tracker/finance.js

@@ -1,27 +1,117 @@
+import chalk from 'chalk'
+const { bold, green, red, yellow, cyan } = chalk
+import transactions from './data.js'
+
+// Add a new transaction. Create a shallow copy using the spread
+// operator so the original object passed in isn't mutated by reference.
 function addTransaction(transaction) {
-  // TODO: Implement this function
+    transactions.push({ ...transaction })
 }
 
 function getTotalIncome() {
-  // TODO: Implement this function
+    let totalIncome = 0
+    // Use for...of and object destructuring for clarity
+    for (const transactionItem of transactions) {
+        const { type, amount } = transactionItem
+        if (type === 'income') {
+            totalIncome += amount
+        }
+    }
+    return totalIncome
 }
 
 function getTotalExpenses() {
-  // TODO: Implement this function
+    let totalExpenses = 0
+    // for...of loop with destructuring improves readability
+    for (const transactionItem of transactions) {
+        const { type, amount } = transactionItem
+        if (type === 'expense') {
+            totalExpenses += amount
+        }
+    }
+    return totalExpenses
 }
 
 function getBalance() {
-  // TODO: Implement this function
+    return getTotalIncome() - getTotalExpenses()
 }
 
 function getTransactionsByCategory(category) {
-  // TODO: Implement this function
+    const filteredTransactions = []
+    // Use for...of and destructuring to collect matching entries
+    for (const transactionItem of transactions) {
+        const { category: transactionCategory } = transactionItem
+        if (transactionCategory === category) {
+            filteredTransactions.push(transactionItem)
+        }
+    }
+    return filteredTransactions
 }
 
 function getLargestExpense() {
-  // TODO: Implement this function
+    let largestAmount = 0
+    // Iterate with destructuring to find the maximum expense amount
+    for (const transactionItem of transactions) {
+        const { type, amount } = transactionItem
+        if (type === 'expense' && amount > largestAmount) {
+            largestAmount = amount
+        }
+    }
+    return largestAmount
 }
 
 function printAllTransactions() {
-  // TODO: Implement this function
-}
+    console.log(bold('💰 PERSONAL FINANCE TRACKER 💰\n'))
+    console.log(bold('All Transactions:'))
+    // Use for...of for clearer iteration
+    for (const transactionItem of transactions) {
+        const { id, type, description, amount, category } = transactionItem
+        const typeDisplay = type.toUpperCase()
+        const amountColor = type === 'income' ? green : red
+        const categoryColor = yellow
+        console.log(
+            `${id}. [${typeDisplay}] ${description} - ${amountColor(`€${amount}`)} (${categoryColor(category)})`
+        )
+    }
+    console.log()
+}
+
+function printSummary() {
+    const totalIncome = getTotalIncome()
+    const totalExpenses = getTotalExpenses()
+    const balance = getBalance()
+    const largestExpenseAmount = getLargestExpense()
+
+    // Find the largest expense transaction's description. We iterate
+    // and compare amounts; stop early when we find the matching entry.
+    let largestExpenseDescription = 'N/A'
+    for (const transactionItem of transactions) {
+        const { type, amount, description } = transactionItem
+        if (type === 'expense' && amount === largestExpenseAmount) {
+            largestExpenseDescription = description
+            break
+        }
+    }
+
+    const balanceColor = balance >= 0 ? cyan : red
+
+    console.log(bold('📊 FINANCIAL SUMMARY 📊'))
+    console.log(bold(`Total Income: ${green(`€${totalIncome}`)}`))
+    console.log(bold(`Total Expenses: ${red(`€${totalExpenses}`)}`))
+    console.log(bold(`Current Balance: ${balanceColor(`€${balance}`)}`))
+    console.log(
+        `\nLargest Expense: ${largestExpenseDescription} (${red(`€${largestExpenseAmount}`)})`
+    )
+    console.log(bold(`Total Transactions: ${transactions.length}`))
+}
+
+export {
+    addTransaction,
+    getTotalIncome,
+    getTotalExpenses,
+    getBalance,
+    getTransactionsByCategory,
+    getLargestExpense,
+    printAllTransactions,
+    printSummary,
+}

finance-tracker/package.json

@@ -0,0 +1,18 @@
+{
+    "name": "finance-tracker",
+    "version": "1.0.0",
+    "description": "",
+    "type": "module",
+    "license": "ISC",
+    "author": "Atiqa N.",
+    "main": "app.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "dependencies": {
+        "chalk": "^4.1.2"
+    },
+    "devDependencies": {
+        "prettier": "3.8.1"
+    }
+}