android-lchat/TODO.md

LocalChat (lchat) - Improvement Plan

Phase 1: Architecture Foundation

1.1 MVVM with ViewModels and Repository Pattern ✅

• Create ViewModels for each screen (LobbyViewModel, ChatViewModel)
• Extract business logic from Fragments to ViewModels
• Create Repository layer for data operations
• Implement proper state management with LiveData/StateFlow
• Add ViewModelFactory if needed

1.2 Dependency Injection with Hilt

• Add Hilt dependencies
• Set up Hilt modules for WifiAwareManager
• Convert singletons to proper DI
• Inject ViewModels using Hilt

Phase 2: Core UX Improvements

2.1 Connection Status Management ✅

• Add connection state to ViewModels
• Create UI indicator for connection status
• Show real-time connection state changes
• Add connection error messages

2.2 User List Feature

• Track connected users in Repository
• Add UI to display active users
• Handle user join/leave events
• Show user count in chat header

Phase 3: Data Persistence

3.1 Room Database Setup

• Add Room dependencies
• Create Message and User entities
• Implement DAOs for data access
• Create database migrations

3.2 Message Persistence

• Store messages in Room database
• Load message history on app restart
• Implement message sync logic
• Add message timestamps

Phase 4: Reliability Improvements

4.1 Reconnection Handling

• Detect connection drops
• Implement exponential backoff retry
• Preserve message queue during disconnection
• Auto-reconnect when network available

4.2 Network State Monitoring

• Monitor WiFi state changes
• Handle app lifecycle properly
• Save and restore connection state

Phase 5: Advanced Features

5.1 Background Service

• Create foreground service for persistent connection
• Handle Doze mode and battery optimization
• Add notification for active chat
• Implement proper service lifecycle

5.2 Additional Features

• Message delivery status
• Typing indicators
• File/image sharing support
• Message encryption improvements

Current Status

• ✅ Phase 1.1 - MVVM Architecture - COMPLETED
• ✅ Phase 2.1 - Connection Status Management - COMPLETED
• 🚀 Next: Phase 1.2 (Dependency Injection) or Phase 3 (Data Persistence)

Completed Work Summary

1. MVVM Architecture: ViewModels, Repository pattern, proper separation of concerns
2. Connection Status: Visual indicator with real-time updates, activity-based detection
3. Sleep/Wake Handling: Auto-recovery when messages resume after device sleep