# Implementation Progress - Maternal App

## Phase 0: Development Environment Setup ✅ COMPLETED

### Completed Tasks
- ✅ React Native mobile app initialized with Expo + TypeScript
- ✅ NestJS backend API initialized
- ✅ Docker Compose infrastructure configured (PostgreSQL, Redis, MongoDB, MinIO)
- ✅ ESLint & Prettier configured for both projects
- ✅ Environment variables configured
- ✅ All Docker services running on non-conflicting ports

**Docker Services:**
- PostgreSQL: `localhost:5555`
- Redis: `localhost:6666`
- MongoDB: `localhost:27777`
- MinIO API: `localhost:9002`
- MinIO Console: `localhost:9003`

---

## Phase 1: Foundation & Authentication 🚧 IN PROGRESS

### Completed Tasks

#### Database Schema & Migrations ✅
- ✅ **TypeORM Configuration**: Database module with async configuration
- ✅ **Entity Models Created**:
  - `User` - Core user authentication entity with email, password hash, locale, timezone
  - `DeviceRegistry` - Device fingerprinting with trusted device management
  - `Family` - Family grouping with share codes
  - `FamilyMember` - Junction table with roles (parent/caregiver/viewer) and permissions
  - `Child` - Child profiles with medical info and soft deletes
  - `RefreshToken` (via migration) - JWT refresh token management

- ✅ **Database Migrations Executed**:
  - **V001**: Core authentication tables (users, device_registry)
  - **V002**: Family structure (families, family_members, children)
  - **V003**: Refresh tokens table for JWT authentication

- ✅ **Migration Infrastructure**:
  - Migration tracking with `schema_migrations` table
  - Automated migration runner script
  - NPM script: `npm run migration:run`

#### Database Tables Verified
```
 users              - User accounts
 device_registry    - Trusted devices per user
 families           - Family groupings
 family_members     - User-family relationships with roles
 children           - Child profiles
 refresh_tokens     - JWT refresh token storage
 schema_migrations  - Migration tracking
```

### In Progress
- 🔄 JWT authentication module implementation

### Remaining Tasks
- ⏳ Build authentication service with bcrypt password hashing
- ⏳ Create authentication endpoints (register, login, refresh, logout)
- ⏳ Implement device fingerprinting validation
- ⏳ Create Passport JWT strategy
- ⏳ Add authentication guards
- ⏳ Build mobile authentication UI screens
- ⏳ Set up i18n for 5 languages (en-US, es-ES, fr-FR, pt-BR, zh-CN)

---

## Project Structure

```
maternal-app/
├── docs/                          # Comprehensive planning docs
├── maternal-app/                  # React Native mobile app
│   ├── src/                       # (To be structured)
│   ├── package.json
│   ├── .eslintrc.js
│   └── .prettierrc
├── maternal-app-backend/          # NestJS backend API
│   ├── src/
│   │   ├── config/
│   │   │   └── database.config.ts
│   │   ├── database/
│   │   │   ├── entities/
│   │   │   │   ├── user.entity.ts
│   │   │   │   ├── device-registry.entity.ts
│   │   │   │   ├── family.entity.ts
│   │   │   │   ├── family-member.entity.ts
│   │   │   │   ├── child.entity.ts
│   │   │   │   └── index.ts
│   │   │   ├── migrations/
│   │   │   │   ├── V001_create_core_auth.sql
│   │   │   │   ├── V002_create_family_structure.sql
│   │   │   │   ├── V003_create_refresh_tokens.sql
│   │   │   │   └── run-migrations.ts
│   │   │   └── database.module.ts
│   │   ├── app.module.ts
│   │   └── main.ts
│   ├── .env
│   └── package.json
├── docker-compose.yml
├── README.md
├── CLAUDE.md
└── PROGRESS.md (this file)
```

---

## Key Decisions & Architecture

### Database Design
- **ID Generation**: Custom nanoid-style IDs with prefixes (usr_, dev_, fam_, chd_)
- **Soft Deletes**: Children have `deleted_at` for data retention
- **JSONB Fields**: Flexible storage for permissions, medical info
- **Indexes**: Optimized for common queries (email lookups, family relationships)

### Authentication Strategy
- **JWT with Refresh Tokens**: Short-lived access tokens (1h), long-lived refresh tokens (7d)
- **Device Fingerprinting**: Track and trust specific devices
- **Multi-Device Support**: Users can be logged in on multiple trusted devices

### Security Considerations
- Password hashing with bcrypt
- Device-based authentication
- Refresh token rotation
- Token revocation support
- COPPA/GDPR compliance preparation

---

## Next Steps

### Immediate (Current Session)
1. Create authentication module with bcrypt
2. Implement JWT strategies (access + refresh)
3. Build authentication controller with all endpoints
4. Add device fingerprinting service
5. Create authentication guards

### Next Session
1. Mobile authentication UI screens
2. i18n setup with 5 languages
3. Email verification flow
4. Password reset functionality

---

## Commands Reference

### Backend
```bash
cd maternal-app-backend

# Start development server
npm run start:dev

# Run migrations
npm run migration:run

# Run tests
npm test
```

### Mobile
```bash
cd maternal-app

# Start Expo
npm start

# Run on iOS
npm run ios

# Run on Android
npm run android
```

### Infrastructure
```bash
# Start all services
docker compose up -d

# Check service status
docker compose ps

# View logs
docker compose logs -f

# Stop all services
docker compose down
```

### Database
```bash
# Connect to PostgreSQL
docker exec -it maternal-postgres psql -U maternal_user -d maternal_app

# List tables
\dt

# Describe table
\d users
```

---

## Technical Debt / Notes

1. **Node Version Warning**: React Native Expo shows warnings for Node 18.x (prefers 20+), but it works fine for development
2. **Security**: All default passwords must be changed before production
3. **ID Generation**: Using custom nanoid implementation - consider using proper nanoid package
4. **Migration Strategy**: Currently using raw SQL - consider switching to TypeORM migrations for better TypeScript integration
5. **Error Handling**: Need to implement standardized error codes as per error-logging documentation

---

**Last Updated**: Phase 1 - Database setup completed, authentication module in progress