321 lines
10 KiB
Markdown
321 lines
10 KiB
Markdown
|
## 🎯 **Complete Notification Service Implementation**
|
||
|
|
|
||
|
|
### **📁 File Structure Created**
|
||
|
|
|
||
|
|
```
|
||
|
|
services/notification/
|
||
|
|
├── app/
|
||
|
|
│ ├── main.py ✅ Complete FastAPI application
|
||
|
|
│ ├── core/
|
||
|
|
│ │ ├── config.py ✅ Configuration settings
|
||
|
|
│ │ └── database.py ✅ Database initialization
|
||
|
|
│ ├── models/
|
||
|
|
│ │ ├── notifications.py ✅ Core notification models
|
||
|
|
│ │ └── templates.py ✅ Template-specific models
|
||
|
|
│ ├── schemas/
|
||
|
|
│ │ └── notifications.py ✅ Pydantic schemas
|
||
|
|
│ ├── services/
|
||
|
|
│ │ ├── notification_service.py ✅ Main business logic
|
||
|
|
│ │ ├── email_service.py ✅ Email delivery
|
||
|
|
│ │ ├── whatsapp_service.py ✅ WhatsApp delivery
|
||
|
|
│ │ └── messaging.py ✅ RabbitMQ integration
|
||
|
|
│ └── api/
|
||
|
|
│ └── notifications.py ✅ Complete API routes
|
||
|
|
├── requirements.txt ✅ Python dependencies
|
||
|
|
├── Dockerfile ✅ Container configuration
|
||
|
|
└── .env.example ✅ Environment variables
|
||
|
|
```
|
||
|
|
|
||
|
|
### **🔧 Key Features Implemented**
|
||
|
|
|
||
|
|
#### **1. Complete Business Logic**
|
||
|
|
|
||
|
|
- ✅ **NotificationService**: Core orchestration of all notification operations
|
||
|
|
- ✅ **Multi-channel support**: Email, WhatsApp, Push (extensible)
|
||
|
|
- ✅ **Template processing**: Jinja2-based template rendering
|
||
|
|
- ✅ **Bulk notifications**: Batch processing with rate limiting
|
||
|
|
- ✅ **User preferences**: Granular notification controls
|
||
|
|
- ✅ **Scheduling**: Delayed notification delivery
|
||
|
|
|
||
|
|
#### **2. Email Service Integration**
|
||
|
|
|
||
|
|
- ✅ **SMTP support**: Configurable email providers (Gmail, SendGrid, etc
|
||
|
|
- ✅ **HTML + Text emails**: Rich email templates with fallbacks
|
||
|
|
- ✅ **Bulk email processing**: Rate-limited batch sending
|
||
|
|
- ✅ **Template system**: Pre-built Spanish templates for bakeries
|
||
|
|
- ✅ **Health checks**: SMTP connection monitoring
|
||
|
|
- ✅ **Attachment support**: File attachment capabilities
|
||
|
|
|
||
|
|
#### **3. WhatsApp Service Integration**
|
||
|
|
|
||
|
|
- ✅ **Twilio integration**: WhatsApp Business API support
|
||
|
|
- ✅ **Spanish phone formatting**: Automatic +34 country code handling
|
||
|
|
- ✅ **Template messages**: WhatsApp Business template support
|
||
|
|
- ✅ **Bulk WhatsApp**: Rate-limited batch messaging
|
||
|
|
- ✅ **Delivery status**: Webhook handling for delivery confirmations
|
||
|
|
|
||
|
|
#### **4. Database Models & Schemas**
|
||
|
|
|
||
|
|
- ✅ **Complete data model**: Notifications, templates, preferences, logs
|
||
|
|
- ✅ **Multi-tenant support**: Tenant-scoped notifications
|
||
|
|
- ✅ **Audit trail**: Detailed delivery attempt logging
|
||
|
|
- ✅ **Template management**: System and custom templates
|
||
|
|
- ✅ **User preferences**: Granular notification controls
|
||
|
|
|
||
|
|
#### **5. API Integration with Gateway**
|
||
|
|
|
||
|
|
- ✅ **Gateway authentication**: Uses shared auth decorators
|
||
|
|
- ✅ **Tenant isolation**: Automatic tenant scoping
|
||
|
|
- ✅ **Role-based access**: Admin/manager/user permissions
|
||
|
|
- ✅ **Complete CRUD**: Full notification management API
|
||
|
|
- ✅ **Webhook endpoints**: External delivery status handling
|
||
|
|
|
||
|
|
#### **6. RabbitMQ Event Integration**
|
||
|
|
|
||
|
|
- ✅ **Event consumers**: Listens for user registration, forecasts, training
|
||
|
|
- ✅ **Event publishers**: Publishes notification status events
|
||
|
|
- ✅ **Auto-notifications**: Triggers welcome emails, alerts, reports
|
||
|
|
- ✅ **Error handling**: Robust message processing with retry logic
|
||
|
|
|
||
|
|
#### **7. Spanish Bakery Templates**
|
||
|
|
|
||
|
|
- ✅ **Welcome email**: Professional onboarding email
|
||
|
|
- ✅ **Forecast alerts**: Demand variation notifications
|
||
|
|
- ✅ **Weekly reports**: Performance summary emails
|
||
|
|
- ✅ **Responsive HTML**: Mobile-optimized email designs
|
||
|
|
- ✅ **Spanish localization**: All content in Spanish
|
||
|
|
|
||
|
|
### **🚀 Integration with Your Architecture**
|
||
|
|
|
||
|
|
#### **Seamless Gateway Integration**
|
||
|
|
|
||
|
|
```python
|
||
|
|
# Gateway already routes to notification service
|
||
|
|
app.include_router(notification.router, prefix="/api/v1/notifications", tags=["notifications"])
|
||
|
|
|
||
|
|
# Authentication handled by gateway middleware
|
||
|
|
# Tenant isolation automatic
|
||
|
|
# User context passed via headers
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **Shared Library Usage**
|
||
|
|
|
||
|
|
```python
|
||
|
|
# Uses your existing shared components
|
||
|
|
from shared.auth.decorators import get_current_user_dep, get_current_tenant_id_dep
|
||
|
|
from shared.messaging.rabbitmq import RabbitMQClient
|
||
|
|
from shared.monitoring.metrics import MetricsCollector
|
||
|
|
from shared.database.base import DatabaseManager
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **Event-Driven Architecture**
|
||
|
|
|
||
|
|
```python
|
||
|
|
# Automatic notifications triggered by:
|
||
|
|
# - User registration → Welcome email
|
||
|
|
# - Forecast alerts → Alert emails + WhatsApp
|
||
|
|
# - Training completion → Status notifications
|
||
|
|
# - Data imports → Import confirmations
|
||
|
|
```
|
||
|
|
|
||
|
|
### **📊 Production Features**
|
||
|
|
|
||
|
|
#### **Health Monitoring**
|
||
|
|
|
||
|
|
- ✅ **Database health checks**: Connection monitoring
|
||
|
|
- ✅ **SMTP health checks**: Email service validation
|
||
|
|
- ✅ **WhatsApp health checks**: API connectivity tests
|
||
|
|
- ✅ **Prometheus metrics**: Delivery rates, response times
|
||
|
|
- ✅ **Structured logging**: Comprehensive error tracking
|
||
|
|
|
||
|
|
#### **Rate Limiting & Scaling**
|
||
|
|
|
||
|
|
- ✅ **Email rate limits**: 1000/hour configurable
|
||
|
|
- ✅ **WhatsApp rate limits**: 100/hour (Twilio limits)
|
||
|
|
- ✅ **Batch processing**: Configurable batch sizes
|
||
|
|
- ✅ **Retry logic**: Automatic retry with exponential backoff
|
||
|
|
- ✅ **Queue management**: Background task processing
|
||
|
|
|
||
|
|
#### **Security & Compliance**
|
||
|
|
|
||
|
|
- ✅ **User consent**: Preference-based opt-in/out
|
||
|
|
- ✅ **Tenant isolation**: Multi-tenant data separation
|
||
|
|
- ✅ **GDPR compliance**: User data control
|
||
|
|
- ✅ **Rate limiting**: DoS protection
|
||
|
|
- ✅ **Input validation**: Pydantic schema validation
|
||
|
|
|
||
|
|
### **🎯 Business-Specific Features**
|
||
|
|
|
||
|
|
#### **Bakery Use Cases**
|
||
|
|
|
||
|
|
```python
|
||
|
|
# Forecast alerts when demand varies >20%
|
||
|
|
# Daily production recommendations
|
||
|
|
# Weekly performance reports
|
||
|
|
# Stock shortage notifications
|
||
|
|
# Weather impact alerts
|
||
|
|
# Holiday/event notifications
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **Spanish Localization**
|
||
|
|
|
||
|
|
- ✅ **Spanish templates**: Native Spanish content
|
||
|
|
- ✅ **Madrid timezone**: Europe/Madrid default
|
||
|
|
- ✅ **Spanish phone format**: +34 prefix handling
|
||
|
|
- ✅ **Local business hours**: Quiet hours support
|
||
|
|
- ✅ **Cultural context**: Bakery-specific terminology
|
||
|
|
|
||
|
|
### **🔄 How to Deploy**
|
||
|
|
|
||
|
|
#### **1. Add to Docker Compose**
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
# Already integrated in your docker-compose.yml
|
||
|
|
notification-service:
|
||
|
|
build: ./services/notification
|
||
|
|
ports:
|
||
|
|
- "8006:8000"
|
||
|
|
environment:
|
||
|
|
- DATABASE_URL=postgresql+asyncpg://notification_user:notification_pass123@notification-db:5432/notification_db
|
||
|
|
depends_on:
|
||
|
|
- notification-db
|
||
|
|
- redis
|
||
|
|
- rabbitmq
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **2. Environment Setup**
|
||
|
|
|
||
|
|
```bash
|
||
|
|
# Copy environment template
|
||
|
|
cp services/notification/.env.example services/notification/.env
|
||
|
|
|
||
|
|
# Configure email provider
|
||
|
|
SMTP_USER=your-email@gmail.com
|
||
|
|
SMTP_PASSWORD=your-app-password
|
||
|
|
|
||
|
|
# Configure WhatsApp (optional)
|
||
|
|
WHATSAPP_API_KEY=your-twilio-sid:your-twilio-token
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **3. Start Service**
|
||
|
|
|
||
|
|
```bash
|
||
|
|
# Service starts automatically with
|
||
|
|
docker-compose up -d
|
||
|
|
|
||
|
|
# Check health
|
||
|
|
curl http://localhost:8006/health
|
||
|
|
|
||
|
|
# View API docs
|
||
|
|
open http://localhost:8006/docs
|
||
|
|
```
|
||
|
|
|
||
|
|
### **📈 API Usage Examples**
|
||
|
|
|
||
|
|
#### **Send Welcome Email**
|
||
|
|
|
||
|
|
```python
|
||
|
|
POST /api/v1/notifications/send
|
||
|
|
{
|
||
|
|
"type": "email",
|
||
|
|
"recipient_email": "usuario@panaderia.com",
|
||
|
|
"template_id": "welcome_email",
|
||
|
|
"template_data": {
|
||
|
|
"user_name": "Juan Carlos",
|
||
|
|
"dashboard_url": "https://app.bakeryforecast.es/dashboard"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **Send Forecast Alert**
|
||
|
|
|
||
|
|
```python
|
||
|
|
POST /api/v1/notifications/send
|
||
|
|
{
|
||
|
|
"type": "email",
|
||
|
|
"template_id": "forecast_alert_email",
|
||
|
|
"template_data": {
|
||
|
|
"bakery_name": "Panadería San Miguel",
|
||
|
|
"product_name": "Pan integral",
|
||
|
|
"forecast_date": "2025-01-25",
|
||
|
|
"predicted_demand": 120,
|
||
|
|
"variation_percentage": 35,
|
||
|
|
"alert_message": "Aumento significativo esperado. Se recomienda incrementar producción."
|
||
|
|
},
|
||
|
|
"broadcast": true,
|
||
|
|
"priority": "high"
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
#### **Update User Preferences**
|
||
|
|
|
||
|
|
```python
|
||
|
|
PATCH /api/v1/notifications/preferences
|
||
|
|
{
|
||
|
|
"email_alerts": true,
|
||
|
|
"whatsapp_enabled": false,
|
||
|
|
"quiet_hours_start": "22:00",
|
||
|
|
"quiet_hours_end": "08:00",
|
||
|
|
"language": "es"
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### **🎉 Key Benefits**
|
||
|
|
|
||
|
|
#### **✅ Production Ready**
|
||
|
|
|
||
|
|
- Complete error handling and logging
|
||
|
|
- Health checks and monitoring
|
||
|
|
- Rate limiting and security
|
||
|
|
- Multi-tenant architecture
|
||
|
|
- Scalable event-driven design
|
||
|
|
|
||
|
|
#### **✅ Business Focused**
|
||
|
|
|
||
|
|
- Spanish bakery templates
|
||
|
|
- Madrid timezone/localization
|
||
|
|
- Forecast-specific notifications
|
||
|
|
- Professional email designs
|
||
|
|
- WhatsApp support for urgent alerts
|
||
|
|
|
||
|
|
#### **✅ Developer Friendly**
|
||
|
|
|
||
|
|
- Comprehensive API documentation
|
||
|
|
- Type-safe Pydantic schemas
|
||
|
|
- Async/await throughout
|
||
|
|
- Structured logging
|
||
|
|
- Easy testing and debugging
|
||
|
|
|
||
|
|
#### **✅ Seamless Integration**
|
||
|
|
|
||
|
|
- Uses your shared libraries
|
||
|
|
- Integrates with gateway auth
|
||
|
|
- Follows your architectural patterns
|
||
|
|
- Maintains tenant isolation
|
||
|
|
- Publishes events to RabbitMQ
|
||
|
|
|
||
|
|
### **🚀 Next Steps**
|
||
|
|
|
||
|
|
#### **Immediate (Week 2)**
|
||
|
|
|
||
|
|
1. **Deploy the service**: Add to your docker-compose and start
|
||
|
|
2. **Configure SMTP**: Set up email provider credentials
|
||
|
|
3. **Test integration**: Send test notifications via API
|
||
|
|
4. **Event integration**: Verify RabbitMQ event handling
|
||
|
|
|
||
|
|
#### **Production Optimization**
|
||
|
|
|
||
|
|
1. **Email provider**: Consider SendGrid/Mailgun for production
|
||
|
|
2. **WhatsApp setup**: Configure Twilio Business API
|
||
|
|
3. **Template customization**: Add tenant-specific templates
|
||
|
|
4. **Analytics dashboard**: Add notification analytics to frontend
|
||
|
|
|
||
|
|
### **💡 Advanced Features Ready for Extension**
|
||
|
|
|
||
|
|
- ✅ **Push notifications**: Framework ready for mobile push
|
||
|
|
- ✅ **SMS support**: Easy to add SMS providers
|
||
|
|
- ✅ **A/B testing**: Template variant testing
|
||
|
|
- ✅ **Scheduled campaigns**: Marketing email campaigns
|
||
|
|
- ✅ **Analytics integration**: Detailed delivery analytics
|
||
|
|
|
||
|
|
**This notification service is now a complete, production-ready microservice that fully integrates with your bakery forecasting platform! It handles all notification needs from welcome emails to urgent forecast alerts, with proper Spanish localization and bakery-specific templates.** 🎯
|