💬 Chat Application

This chat application is designed to deliver seamless real-time communication with a robust set of features that cater to modern messaging needs. the application ensures efficiency, security, and scalability, making it ideal for both personal and professional use.

📑 Table of Contents

• 🚀 Features
  • 💬 Real-time Messaging
  • 👥 Conversations Management
  • 📁 File Sharing
  • 🔐 Authentication and Authorization
• 🔔 Advanced Notification System
  • 📡 Server-Sent Events (SSE) Integration
  • ❤️ Heartbeat Mechanism
  • ⚙️ Dynamic Event Handling
  • 🔄 Efficient User Management
• 🛠️ Technology Stack
  • ☕ Backend
  • 🌐 Frontend

🚀 Features

💬 Real-time Messaging

• Engage in instant conversations with friends, family, or colleagues. Messages are delivered in real-time, ensuring smooth and uninterrupted communication.

👥 Conversations Management

• Organize and manage conversations with ease. The application allows users to create, update, and archive chats, keeping communication streamlined and organized.

📁 File Sharing

• Share images, videos, and documents effortlessly within conversations. The file-sharing feature supports various media types, enabling rich and versatile communication.

🔐 Authentication and Authorization

• Security is paramount, with user authentication and role-based authorization managed through Keycloak (OAuth2). This ensures that user data is protected and access is appropriately controlled.

🔔 Advanced Notification System

The application features a cutting-edge notification system powered by the NotificationService, which is integral to maintaining real-time communication and user engagement.

📡 Server-Sent Events (SSE) Integration

• The NotificationService employs SSE to push real-time notifications to users, ensuring they receive timely updates without needing to refresh or poll the server continuously.

❤️ Heartbeat Mechanism

• A built-in heartbeat mechanism runs at regular intervals to maintain active connections and monitor user presence. This ensures users are accurately tracked as online or offline, enhancing the overall user experience.

⚙️ Dynamic Event Handling

• Notifications are tailored and sent based on specific events, such as new messages or system alerts. The service dynamically manages these notifications, ensuring users receive relevant information in real-time.

🔄 Efficient User Management

• The service efficiently manages connections by adding or removing emitters based on user activity. This ensures that only active users are maintained in the system, optimizing resource usage.

🛠️ Technology Stack

☕ Backend

• Java 17+: Core programming language.
• Spring Boot 3.x: Framework for building the backend.
• Keycloak 20+: Used for authentication and authorization (OAuth2).
• PostgreSQL: Database management system.
• Liquibase: Database version control.
• Jilt: Dependency injection utility.
• Docker Compose: For orchestrating multi-container Docker applications.
• Lombok: For reducing boilerplate code in Java.

🌐 Frontend

• Angular 18: Framework for building the frontend.
• Bootstrap 5.3: Frontend CSS framework for responsive design.
• FontAwesome: Icons for a modern user interface.
• Keycloak JS: JavaScript library for Keycloak integration.