File Structure.md

Frontend (src Folder)

/components

Components are the building blocks of your React UI. They are reusable and can manage their state.

• Contains React components.
• Each component represents a part of the UI.
• Components can be further divided into smaller units (e.g., Button.js, Navbar.js) and larger units (e.g., Header.js, Footer.js).

Example (src/components/Navbar.js):

import React from 'react';

function Navbar() {
  return (
    <nav>
      <ul>
        <li>Home</li>
        <li>About</li>
        <li>Contact</li>
      </ul>
    </nav>
  );
}

export default Navbar;

/services

Services handle data fetching and interaction with external APIs.

• Houses functions that handle external interactions, like API calls.
• This abstraction separates the logic of how data is fetched or sent from the components themselves.

Example (src/services/flightService.js):

import axios from 'axios';

const getFlightData = async () => {
  try {
    const response = await axios.get('http://yourapi.com/flights');
    return response.data;
  } catch (error) {
    console.error('Error fetching flight data:', error);
    throw error;
  }
};

export { getFlightData };

/hooks

Custom hooks allow you to extract component logic into reusable functions.

• For custom React hooks.
• Hooks allow you to extract component logic into reusable functions (e.g., useFetch.js for fetching data).

Example (src/hooks/useFetch.js):

import { useState, useEffect } from 'react';
import axios from 'axios';

const useFetch = (url) => {
  const [data, setData] = useState(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);

  useEffect(() => {
    const fetchData = async () => {
      try {
        const response = await axios.get(url);
        setData(response.data);
        setLoading(false);
      } catch (error) {
        setError(error);
        setLoading(false);
      }
    };
    fetchData();
  }, [url]);

  return { data, loading, error };
};

export default useFetch;

/contexts

Context provides a way to pass data through the component tree without having to pass props down manually.

• Used for React Context API.
• Contexts provide a way to pass data through the component tree without having to pass props down manually at every level.

Example (src/contexts/UserContext.js):

import React, { createContext, useState } from 'react';

export const UserContext = createContext();

export const UserProvider = ({ children }) => {
  const [user, setUser] = useState(null);

  return (
    <UserContext.Provider value={{ user, setUser }}>
      {children}
    </UserContext.Provider>
  );
};

/utils

Utility functions can be used across different components.

• Contains utility functions which can be used across different components or services.
• Examples include date formatting functions, data validators, or helper functions.

Example (src/utils/formatDate.js):

export const formatDate = (dateString) => {
  const options = { year: 'numeric', month: 'long', day: 'numeric' };
  return new Date(dateString).toLocaleDateString(undefined, options);
};

Backend (backend Folder)

/controllers

Controllers handle the business logic for each endpoint.

• Contains functions that respond to various HTTP requests.
• Each function handles the business logic for a specific route.

Example (backend/controllers/flightController.js):

exports.getFlights = async (req, res) => {
  try {
    const flights = await FlightService.getAll(); // Assuming FlightService is defined
    res.json(flights);
  } catch (error) {
    res.status(500).send(error.message);
  }
};

/models

Models define the schema for database entities.

• Defines the schema for your database models.
• Used in applications that interact with databases like MongoDB, PostgreSQL, etc.

Example (backend/models/Flight.js):

const mongoose = require('mongoose');

const flightSchema = new mongoose.Schema({
  airline: String,
  number: String,
  departure: String,
  arrival: String
});

module.exports = mongoose.model('Flight', flightSchema);

/routes

Routes define API endpoints and connect them to controllers.

• Defines API endpoints and associates them with controller functions.
• Helps in managing and organizing different API routes.

Example (backend/routes/flightRoutes.js):

const express = require('express');
const router = express.Router();
const flightController = require('../controllers/flightController');

router.get('/flights', flightController.getFlights);

module.exports = router;

/middleware

Middleware functions can process requests before they reach your controllers.

• For middleware functions.
• Middleware functions can modify or interact with incoming requests before they reach the controllers (e.g., authentication, logging, error handling).

Example (backend/middleware/authMiddleware.js):

const authMiddleware = (req, res, next) => {
  // Authentication logic here
  next();
};

module.exports = authMiddleware;

server.js

The entry point for the backend application, setting up the server, middleware, and routes.

• The entry point of your backend application.
• Sets up the server, middleware, routes, and any other initial configurations.

Example (backend/server.js):

const express = require('express');
const app = express();
const flightRoutes = require('./routes/flightRoutes');

app.use(express.json());
app.use('/api', flightRoutes);

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});

File Structure

/my-app
|-- /src
|   |-- /components
|   |-- /services
|   |-- /hooks
|   |-- /contexts
|   |-- /utils
|   |-- /assets
|   |-- /types
|   |-- App.tsx
|   |-- index.tsx
|
|-- /backend
    |-- /controllers
    |-- /models
    |-- /routes
    |-- /middleware
    |-- /utils
    |-- server.js (or server.ts)
|
|-- package.json
|-- README.md
|-- .gitignore
|-- (other config files)