Merge pull request #329 from abckhush/h1

added expenseTrackerAPI

New_APIs/Expense_Tracker_API/.gitignore

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+/node_modules
+.env

New_APIs/Expense_Tracker_API/README.md

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+# Expense Tracker API
+
+## Description
+This API allows users to manage their expenses by providing functionalities to add, update, delete, and retrieve expenses. Users can also register and log in to secure their data. The API supports filtering expenses by various criteria, including month and year.
+
+## Features
+1. User registration and login to secure expense data.
+2. Add new expenses.
+3. Update existing expenses.
+4. Delete expenses.
+5. Retrieve expenses by various criteria (e.g., month, year, category).
+6. Retrieve expenses for a specific month and year.
+
+## Requirements
+- Node.js
+- MongoDB
+- Postman
+
+## Installation
+1. Clone the Repository:
+
+```bash
+git clone https://github.com/dishamodi0910/APIVerse.git
+cd New_APIs
+cd Expense_Tracker_API
+```
+
+2.Install Dependencies:
+
+```bash
+npm install
+```
+4. Start the Server:
+
+```bash
+node server.js
+```
+
+## API Endpoints:
+
+1. User Registration
+
+```http
+POST /api/auth/register
+```
+
+2.User Login
+
+```http
+POST /api/auth/login
+```
+
+3. Add Expenses
+
+```http
+POST /api/expenses
+```
+
+4. Update Expenses
+
+```http
+PUT /api/expenses/:id
+```
+
+5. Delete Expenses
+
+```http
+GET /api/expenses
+```
+
+6. Get Expenses by Month and Year
+
+```http
+GET /api/expenses/month/:month/year/:year
+```
+
+## Notes
+- Ensure the server is running at 5000.
+- Use Postman or similar tools to test and interact with the API endpoints.

New_APIs/Expense_Tracker_API/config/db.js

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+const fs = require('fs');
+const path = require('path');
+
+const dbPath = path.resolve(__dirname, '../database.json');
+
+// Initialize the database file if it does not exist
+const initializeDB = () => {
+  if (!fs.existsSync(dbPath)) {
+    const initialData = { users: [], expenses: [] };
+    fs.writeFileSync(dbPath, JSON.stringify(initialData, null, 2));
+  }
+};
+
+initializeDB();
+
+const readData = () => {
+  const data = fs.readFileSync(dbPath);
+  return JSON.parse(data);
+};
+
+const writeData = (data) => {
+  fs.writeFileSync(dbPath, JSON.stringify(data, null, 2));
+};
+
+module.exports = { readData, writeData };

New_APIs/Expense_Tracker_API/database.json

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+{
+  "users": [
+    {
+      "id": 1721424141648,
+      "name": "Khushi Kalra",
+      "email": "[email protected]",
+      "password": "$2a$10$hfW1tOhVl4JK77JY0uJmSeexuEbWcXU3BFEl0LJYRXR9Z3dIKMBUm"
+    },
+    {
+      "id": 1721454350397,
+      "name": "XYZ",
+      "email": "[email protected]",
+      "password": "$2a$10$Rn4gwRZyHjMRdZka23KSXuEP2GAJkGbmUZzH.zhExyiNO3yZOrDmq"
+    }
+  ],
+  "expenses": [
+    {
+      "id": 1721452253157,
+      "userId": 1721424141648,
+      "amount": 100,
+      "description": "Office Supplies",
+      "category": "Work",
+      "date": "2024-07-20T05:10:53.157Z"
+    },
+    {
+      "id": 1721452284744,
+      "userId": 1721424141648,
+      "amount": 50,
+      "description": "Markers",
+      "category": "Work",
+      "date": "2024-07-20T05:11:24.744Z"
+    },
+    {
+      "id": 1721452309611,
+      "userId": 1721424141648,
+      "amount": 250,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-06-20T05:11:49.611Z"
+    },
+    {
+      "id": 1721454204902,
+      "userId": 1721424141648,
+      "amount": 50,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:43:24.902Z"
+    },
+    {
+      "id": 1721454410029,
+      "userId": 1721454350397,
+      "amount": 150,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:46:50.029Z"
+    },
+    {
+      "id": 1721454479574,
+      "userId": 1721454350397,
+      "amount": 50,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:47:59.574Z"
+    }
+  ]
+}

New_APIs/Expense_Tracker_API/models/Expense.js

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+const { readData, writeData } = require('../config/db');
+
+const createExpense = (userId, amount, description, category) => {
+  const data = readData();
+  const newExpense = { id: Date.now(), userId, amount, description, category, date: new Date() };
+  data.expenses.push(newExpense);
+  writeData(data);
+  return newExpense;
+};
+
+const getExpensesByUserId = (userId) => {
+  const data = readData();
+  return data.expenses.filter(expense => expense.userId === userId);
+};
+
+const getExpensesByCategory = (userId, category) => {
+  const data = readData();
+  return data.expenses.filter(expense => expense.userId === userId && expense.category === category);
+};
+
+const getTotalAmountByCategory = (userId, category) => {
+  const expenses = getExpensesByCategory(userId, category);
+  return expenses.reduce((total, expense) => total + expense.amount, 0);
+};
+
+const deleteExpenseById = (id) => {
+  const data = readData();
+  data.expenses = data.expenses.filter(expense => expense.id !== id);
+  writeData(data);
+};
+
+const getMonthlyExpenses = (userId) => {
+  const data = readData();
+
+  const expensesByMonth = data.expenses
+    .filter(expense => expense.userId === userId)
+    .reduce((acc, expense) => {
+      const expenseDate = new Date(expense.date);
+      const month = expenseDate.getMonth() + 1; // JavaScript months are 0-based
+      const year = expenseDate.getFullYear();
+      const key = `${year}-${month.toString().padStart(2, '0')}`;
+
+      if (!acc[key]) {
+        acc[key] = { total: 0, expenses: [] };
+      }
+      acc[key].total += expense.amount;
+      acc[key].expenses.push(expense);
+
+      return acc;
+    }, {});
+
+  return expensesByMonth;
+};
+
+const getExpensesByMonthYear = (userId, year, month) => {
+  const data = readData();
+  const filteredExpenses = data.expenses.filter(expense => {
+    const expenseDate = new Date(expense.date);
+    return expense.userId === userId && expenseDate.getFullYear() === year && (expenseDate.getMonth() + 1) === month;
+  });
+
+  const totalAmount = filteredExpenses.reduce((total, expense) => total + expense.amount, 0);
+  return { totalAmount, expenses: filteredExpenses };
+};
+
+module.exports = {
+  createExpense,
+  getExpensesByUserId,
+  getExpensesByCategory,
+  getTotalAmountByCategory,
+  deleteExpenseById,
+  getMonthlyExpenses,
+  getExpensesByMonthYear
+};

New_APIs/Expense_Tracker_API/models/User.js

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+const { readData, writeData } = require('../config/db');
+
+const createUser = (name, email, password) => {
+  const data = readData();
+  const newUser = { id: Date.now(), name, email, password };
+  data.users.push(newUser);
+  writeData(data);
+  return newUser;
+};
+
+const getUserByEmail = (email) => {
+  const data = readData();
+  return data.users.find(user => user.email === email);
+};
+
+module.exports = { createUser, getUserByEmail };