Booking App – Major Projects

This tutorial delves into the core functionalities of a booking application, focusing on JavaScript development. We’ll explore significant projects, building a robust system from scratch, incorporating features like user authentication, booking management, and a basic search functionality. This level requires a solid understanding of JavaScript fundamentals, including DOM manipulation, event handling, and asynchronous programming. It’s designed for advanced learners who are comfortable with object-oriented programming and have experience with basic web development concepts.

💻 Project 1: Basic Booking System

This project establishes the fundamental structure of a booking application. It includes user registration, booking creation, and viewing booking details.

// === User Registration ===
function registerUser(username, password) {
  // Simulate a database (replace with a real database connection)
  const user = {
    id: "123",
    username: username,
    password: password,
    email: username + "@netgramnews.com" // Simulate a unique email
  };
  // Store the user in a simple array
  let users = [user];
  return users;
}

function loginUser(username, password) {
  // Simulate a database check
  const user = users.find(u => u.username === username && u.password === password);
  if (user) {
    return user;
  } else {
    return null;
  }
}

// Example usage
const newUser = registerUser("john.doe", "password123");
const user1 = loginUser("john.doe", "password123");

console.log("User registered:", newUser);
console.log("User logged in:", user1);

This code demonstrates the registration and login processes. The users array simulates a simple database. In a real application, you'd connect to a database (e.g., MongoDB, PostgreSQL) and interact with it using a library like node-postgres or mongoose. The find method is used to search for a user by username.

Project 2: Booking Management System

This project expands upon the previous one, adding features for managing bookings. It includes a list of bookings, the ability to view booking details, and the functionality to update booking information.

// === Booking List ===
function displayBookings() {
  // Simulate a list of bookings
  const bookings = [
    { id: "1", user_id: "1", date: "2024-10-27", status: "confirmed" },
    { id: "2", user_id: "2", date: "2024-10-28", status: "pending" },
    { id: "3", user_id: "1", date: "2024-10-29", status: "cancelled" }
  ];

  console.log("Bookings:");
  bookings.forEach(booking => {
    console.log(`ID: ${booking.id}, User: ${booking.user_id}, Date: ${booking.date}, Status: ${booking.status}`);
  });
}

// Example usage
displayBookings();

This code displays a list of bookings. It uses a simple array to represent the bookings. In a real application, you'd fetch bookings from a database. The forEach loop iterates through the array and prints each booking's details.

Project 3: Search Booking System

This project introduces a basic search functionality, allowing users to find bookings based on date and user ID.

// === Search Booking ===
function searchBookings(query) {
  // Simulate a search query
  const results = [
    { id: "1", user_id: "1", date: "2024-10-27", status: "confirmed" },
    { id: "2", user_id: "2", date: "2024-10-28", status: "pending" },
    { id: "3", user_id: "1", date: "2024-10-29", status: "cancelled" }
  ];

  const resultsForQuery = results.filter(booking =>
    booking.user_id === query.user_id || booking.date === query.date
  );

  console.log("Search Results:");
  resultsForQuery.forEach(booking => {
    console.log(`ID: ${booking.id}, User: ${booking.user_id}, Date: ${booking.date}, Status: ${booking.status}`);
  });
}

// Example usage
searchBookings("john.doe");

This code demonstrates a search function. It filters the bookings based on the provided query. The filter method is used to select bookings that match the query. The query parameter is a string representing the search term.

💡 Tip: Consider using a library like lodash for more advanced search functionalities, such as fuzzy matching and sorting.

Key Takeaways

This tutorial has covered the basics of building a booking application using JavaScript. Key concepts include DOM manipulation, event handling, data structures (arrays and objects), and basic database interaction (simulated here). Remember that this is a starting point; a real-world booking application would require a more robust architecture, including user authentication, payment processing, and integration with a database. Further exploration of asynchronous programming, state management, and testing will be crucial for building a scalable and maintainable application.