🚀 SocketChat — Real-Time Chat Application

Real-Time Chat Interface with Offline Support

SocketChat is a single-screen (P0) real-time chat application built using Jetpack Compose, MVVM, Hilt, Room, and PieSocket WebSockets.
It supports:

✔ Live message streaming
✔ Offline queueing
✔ Automatic resend
✔ Conversations list
✔ Unread preview
✔ Full error handling

This project fulfills all required functional points from the assignment, including real-time sync, offline behavior, message reliability, and chat preview list.

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📦 APK Download

👉 Download APK

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🧰 Tech Stack

• Kotlin
• Jetpack Compose
• MVVM Architecture
• Hilt Dependency Injection
• Room Database
• WebSockets (PieSocket)
• Coroutines + StateFlow
• Material 3 Design

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✅ Features Implemented

🔹 1. Single-Screen Chat Interface (P0)

• Clean, real-time Compose chat UI.
• Messages aligned left (others) / right (mine).
• Auto-scroll to latest message.
• Intelligent “New Messages” button when user is not at bottom.

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🔹 2. Real-Time Syncing with WebSockets

• Uses PieSocket WebSocket channel.
• Messages appear instantly without refreshing.
• Messages are sent as JSON:

{
  "senderId": "<device-id>",
  "content": "Hello!"
}

🔹 3. Offline Functionality (P0)

• Detects network disconnect with NetworkMonitor.
• Unsent messages stored in Room (Pending Messages).
• Automatically resent on reconnection with proper JSON payload.

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🔹 4. Error Handling

• Shows Snackbars for: i) Socket failures ii) Connection drops iii) Resend failures
• Handles empty states: ❗ No Internet ❗ No Chats Available

🔹 5. Conversations List (P1/P2)

Includes:

• Last message preview

• Unread message count

• Timestamp

• Tapping a conversation opens chat screen

• Conversations cleared on app close (per requirement)

  🔹 6. Navigation (P2)

  Simple internal navigation between:

✔ Conversations List ✔ Chat Screen

🗂 Project Structure

com.himanshuhc.socketchat │ ├── data │ ├── local (Room) │ ├── repository (ChatRepositoryImpl) │ └── socket (PieSocketManager) │ ├── domain │ └── model (MessageModel, Conversation) │ ├── presentation │ ├── chatlist (Chat UI + ViewModel) │ └── conversation (Conversation UI + ViewModel) │ ├── core (NetworkMonitor) └── di (Hilt Modules)

⚙️ How It Works

Message Flow

1. User sends message
2. If online → Sent instantly through WebSocket
3. If offline → Added to Room DB (pending queue)
4. On reconnect → Auto resend
5. Incoming messages update:

• Chat UI

• Conversations preview

• Unread count

  📡 WebSocket Endpoint

Used as per PieSocket: wss://s15496.blr1.piesocket.com/v3/1?api_key=C7uK7TCatKTXwfSSQwcRjbVntcKN6kEvFeiNPwgM&notify_self=0