SkyChat Application

Description

SkyChat is a fully featured messaging application built with Flutter, offering secure real-time chat, media sharing, and high-quality WebRTC-based voice/video calls. The system is designed for performance, scalability, and customization with a clean architecture across client and backend.

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🚀 Features

🔹 Real-Time Messaging

• Instant chat via Socket.IO
• Read receipts, typing indicators, message status
• Offline support & automatic reconnection

🔹 Media & Advanced Chat

• Image, video, audio, and file sharing
• Voice messages with waveform
• Reply, forward, reaction, edit & delete message

🔹 HD Voice & Video Calls (WebRTC)

• Low-latency peer-to-peer communication
• Adaptive video quality
• Call notifications & device handling

🎨 Customizable User Experience

• Themes & custom wallpapers
• Smooth animations and responsive UI
• Multi-language support

🔒 Security

• End-to-end encryption for messages & calls
• Secure token-based authentication
• Local encrypted storage via Hive

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🏗️ System Architecture

Flutter App (Riverpod, WebRTC, Hive)
│
├── Socket.IO Gateway (Real-time messaging)
├── REST API (Auth, conversations, call logs)
├── Firebase Messaging (Push notifications)
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MongoDB Database (Users, Messages, Calls, Media)

Architecture Highlights

• Event-driven real-time design
• WebRTC peer-to-peer media communication
• Offline-first model with local caching
• Modular backend for scalability (Auth / Chat / Call services)

🛠️ Technology Stack

Frontend (Flutter)

• Flutter
• Riverpod
• WebRTC
• Hive
• Firebase Messaging
• Firebase Analytics

Backend

• Node.js / Express
• Socket.IO
• MongoDB + Mongoose
• JWT Authentication
• Firebase Admin

📊 Comparison with Similar Systems

📌 Highlights

• Clean architecture with Repository + Service pattern
• Designed for real-time performance & low latency
• Flutter cross-platform (Android/iOS)
• Scalable backend ready for production

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