Add FastAPI application, API endpoints, Celery workers, and Docker configuration

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
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copilot-swe-agent[bot]
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# POP3 Forwarder SaaS - Multi-Tenant Architecture
This document describes the new multi-tenant SaaS architecture for the POP3/IMAP email forwarder.
## 🎯 Project Overview
The project has been transformed from a single-user Docker application into a full-featured multi-tenant SaaS platform with:
- **Multi-user support** with subscription tiers
- **Google OAuth2 authentication**
- **RESTful API** for all operations
- **Web dashboard** (frontend to be implemented)
- **Subscription management** with Stripe integration
- **POP3 and IMAP protocol support**
- **Auto-detection** of mail server settings
- **Encrypted credential storage**
- **Background job processing** with Celery
- **Multi-channel notifications** with Apprise
## 📁 Project Structure
```
pop_puller_to_gmail/
├── backend/ # FastAPI backend application
│ ├── app/
│ │ ├── api/ # API endpoints
│ │ │ └── v1/
│ │ │ ├── endpoints/ # Individual route modules
│ │ │ └── api.py # Router aggregation
│ │ ├── core/ # Core configuration
│ │ │ ├── config.py # Settings management
│ │ │ ├── database.py # Database connection
│ │ │ ├── security.py # Security utilities
│ │ │ └── deps.py # FastAPI dependencies
│ │ ├── models/ # Data models
│ │ │ ├── database_models.py # SQLAlchemy models
│ │ │ └── schemas.py # Pydantic schemas
│ │ ├── services/ # Business logic
│ │ │ ├── auth_service.py # OAuth authentication
│ │ │ └── mail_processor.py # Email processing
│ │ ├── workers/ # Celery background tasks
│ │ ├── utils/ # Utility functions
│ │ └── main.py # FastAPI application
│ ├── alembic/ # Database migrations
│ ├── tests/ # Test suite
│ ├── requirements.txt # Python dependencies
│ ├── Dockerfile # Docker configuration
│ └── .env.example # Environment template
├── frontend/ # React/Next.js frontend (to be implemented)
├── docker-compose.new.yml # Docker Compose for all services
├── pop3_forwarder.py # Legacy single-user script
└── README.md # This file
```
## 🚀 Quick Start
### Prerequisites
- Docker and Docker Compose
- PostgreSQL 15+
- Redis 7+
- Python 3.11+ (for local development)
- Node.js 18+ (for frontend development)
### Setup
1. **Clone and navigate to repository**
```bash
git clone https://github.com/christianlouis/pop_puller_to_gmail.git
cd pop_puller_to_gmail
```
2. **Configure backend environment**
```bash
cp backend/.env.example backend/.env
# Edit backend/.env with your settings
```
3. **Start services with Docker Compose**
```bash
docker-compose -f docker-compose.new.yml up -d
```
4. **Run database migrations**
```bash
docker-compose -f docker-compose.new.yml exec backend alembic upgrade head
```
5. **Access the application**
- API: http://localhost:8000
- API Documentation: http://localhost:8000/api/docs
- Frontend: http://localhost:3000 (when implemented)
## 🔑 Key Features
### 1. Multi-Tenant User Management
- **User Registration**: Email/password and Google OAuth2
- **Subscription Tiers**: Free, Basic, Pro, Enterprise
- **Account Limits**: Based on subscription tier
- **Secure Storage**: Encrypted credentials with Fernet encryption
### 2. Mail Account Management
- **Protocols**: POP3, POP3+SSL, IMAP, IMAP+SSL
- **Auto-Detection**: Automatic server configuration for common providers
- **Provider Presets**: Gmail, Outlook, GMX, WEB.de, T-Online, Yahoo
- **Connection Testing**: Test before saving
- **Per-Account Settings**: Check interval, max emails, forwarding destination
### 3. Email Processing
- **Background Jobs**: Celery workers for async processing
- **Scheduled Checks**: Configurable intervals per account
- **Smart Forwarding**: Preserves metadata, handles MIME types
- **Error Handling**: Automatic retries with exponential backoff
- **Statistics**: Track success/failure rates, last check times
### 4. Subscription Management
- **Stripe Integration**: Secure payment processing
- **Tier-Based Limits**: Automatic enforcement
- **Upgrade/Downgrade**: Self-service subscription changes
- **Webhook Handling**: Real-time subscription updates
### 5. Notifications
- **Multi-Channel**: Email, Telegram, Webhook, Slack, Discord
- **Apprise Integration**: 70+ notification services
- **Smart Alerting**: Threshold-based notifications
- **Per-User Configuration**: Custom notification preferences
### 6. Security
- **JWT Authentication**: Secure API access
- **Encrypted Credentials**: All POP3/IMAP passwords encrypted at rest
- **OAuth2**: Google Sign-In support
- **Audit Logging**: Complete audit trail
- **RBAC**: Role-based access control
- **Rate Limiting**: Per-user and per-tier limits
## 🗄️ Database Schema
### Core Tables
- **users**: User accounts, OAuth info, subscription data
- **mail_accounts**: POP3/IMAP account configurations
- **processing_runs**: Email processing batch records
- **processing_logs**: Detailed processing logs
- **notification_configs**: User notification settings
- **subscription_plans**: Available subscription tiers
- **mail_server_presets**: Known provider configurations
- **audit_logs**: Security and compliance audit trail
## 🔌 API Endpoints
### Authentication
- `POST /api/v1/auth/register` - Register new user
- `POST /api/v1/auth/login` - Login with email/password
- `POST /api/v1/auth/google` - Google OAuth2 login
- `GET /api/v1/auth/google/authorize-url` - Get OAuth URL
### Users
- `GET /api/v1/users/me` - Get current user profile
- `PUT /api/v1/users/me` - Update user profile
### Mail Accounts
- `POST /api/v1/mail-accounts` - Create mail account
- `GET /api/v1/mail-accounts` - List user's accounts
- `GET /api/v1/mail-accounts/{id}` - Get account details
- `PUT /api/v1/mail-accounts/{id}` - Update account
- `DELETE /api/v1/mail-accounts/{id}` - Delete account
- `POST /api/v1/mail-accounts/test` - Test connection
- `POST /api/v1/mail-accounts/auto-detect` - Auto-detect settings
### Notifications
- `POST /api/v1/notifications` - Create notification config
- `GET /api/v1/notifications` - List notification configs
### Subscriptions
- `GET /api/v1/subscriptions/plans` - List available plans
- `GET /api/v1/subscriptions/current` - Get current subscription
### Admin
- `GET /api/v1/admin/stats` - System statistics (admin only)
See full API documentation at `/api/docs` when running.
## 🔧 Configuration
### Environment Variables
Key configuration options in `backend/.env`:
```bash
# Database
DATABASE_URL=postgresql+asyncpg://user:pass@host:port/db
# Security
SECRET_KEY=your-secret-key-min-32-chars
ENCRYPTION_KEY=your-encryption-key
# OAuth
GOOGLE_CLIENT_ID=your-client-id
GOOGLE_CLIENT_SECRET=your-client-secret
# Stripe (optional)
STRIPE_API_KEY=sk_test_...
STRIPE_WEBHOOK_SECRET=whsec_...
# Limits
TIER_FREE_MAX_ACCOUNTS=1
TIER_BASIC_MAX_ACCOUNTS=5
TIER_PRO_MAX_ACCOUNTS=20
TIER_ENTERPRISE_MAX_ACCOUNTS=100
# Processing
CHECK_INTERVAL_MINUTES=5
MAX_EMAILS_PER_RUN=50
THROTTLE_EMAILS_PER_MINUTE=10
```
### Subscription Tiers
| Tier | Max Accounts | Price | Features |
|------|--------------|-------|----------|
| Free | 1 | $0/mo | Basic email forwarding |
| Basic | 5 | $9/mo | Multiple accounts, Priority support |
| Pro | 20 | $29/mo | Advanced features, API access |
| Enterprise | 100 | $99/mo | White-label, SLA, Dedicated support |
## 🧪 Testing
```bash
# Run tests
cd backend
pytest
# With coverage
pytest --cov=app --cov-report=html
# Run specific test file
pytest tests/test_auth.py
```
## 📦 Deployment
### Production Deployment
1. **Set production environment variables**
2. **Use production database** (PostgreSQL with backups)
3. **Configure Redis** for caching and job queue
4. **Set up SSL/TLS** with reverse proxy (nginx/traefik)
5. **Enable monitoring** (Prometheus, Grafana)
6. **Configure logging** (structured JSON logs)
### Kubernetes Deployment
Coming soon: Kubernetes manifests and Helm charts.
## 🔄 Migration from Legacy Version
To migrate from the single-user `pop3_forwarder.py`:
1. **Export existing configuration** from `.env` file
2. **Create user account** via API or admin panel
3. **Add mail accounts** using the API:
```bash
curl -X POST http://localhost:8000/api/v1/mail-accounts \
-H "Authorization: Bearer YOUR_TOKEN" \
-H "Content-Type: application/json" \
-d @account.json
```
4. **Verify processing** in the dashboard
5. **Stop legacy container** once confirmed working
## 🛠️ Development
### Local Development Setup
```bash
# Backend
cd backend
python -m venv venv
source venv/bin/activate
pip install -r requirements.txt
# Run database
docker-compose -f docker-compose.new.yml up postgres redis -d
# Run migrations
alembic upgrade head
# Start development server
uvicorn app.main:app --reload --port 8000
# Frontend (to be implemented)
cd frontend
npm install
npm run dev
```
### Database Migrations
```bash
# Create new migration
alembic revision --autogenerate -m "Description"
# Apply migrations
alembic upgrade head
# Rollback migration
alembic downgrade -1
```
## 📚 Additional Documentation
- [API Documentation](http://localhost:8000/api/docs) - Interactive API docs
- [CONTRIBUTING.md](CONTRIBUTING.md) - Contribution guidelines
- [ROADMAP.md](ROADMAP.md) - Future development plans
- [SECURITY.md](SECURITY.md) - Security policies
## 🤝 Contributing
Contributions welcome! Please:
1. Fork the repository
2. Create a feature branch
3. Make your changes with tests
4. Submit a pull request
## 📄 License
MIT License - See [LICENSE](LICENSE) file
## 🆘 Support
- **Issues**: https://github.com/christianlouis/pop_puller_to_gmail/issues
- **Discussions**: https://github.com/christianlouis/pop_puller_to_gmail/discussions
- **Email**: support@example.com
## 🙏 Acknowledgments
Built with:
- [FastAPI](https://fastapi.tiangolo.com/) - Modern Python web framework
- [SQLAlchemy](https://www.sqlalchemy.org/) - Database ORM
- [Celery](https://docs.celeryq.dev/) - Distributed task queue
- [Stripe](https://stripe.com/) - Payment processing
- [Apprise](https://github.com/caronc/apprise) - Notification service
- [React](https://react.dev/) - Frontend framework
---
**Status**: 🚧 Active Development - Phase 1 Complete
For questions or feedback, please open an issue on GitHub.
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# Database Configuration
DATABASE_URL=postgresql+asyncpg://postgres:password@localhost:5432/pop3_forwarder
# Security
SECRET_KEY=change-this-to-a-secure-random-secret-key-minimum-32-characters
ENCRYPTION_KEY=change-this-to-a-secure-encryption-key-for-credentials
ALGORITHM=HS256
ACCESS_TOKEN_EXPIRE_MINUTES=30
REFRESH_TOKEN_EXPIRE_DAYS=7
# OAuth2 - Google
GOOGLE_CLIENT_ID=your-google-client-id.apps.googleusercontent.com
GOOGLE_CLIENT_SECRET=your-google-client-secret
GOOGLE_REDIRECT_URI=http://localhost:3000/auth/callback/google
# CORS Origins (comma-separated)
CORS_ORIGINS=http://localhost:3000,http://localhost:8000
# Stripe Payment (Optional)
STRIPE_API_KEY=sk_test_your_stripe_api_key
STRIPE_WEBHOOK_SECRET=whsec_your_webhook_secret
STRIPE_PUBLISHABLE_KEY=pk_test_your_publishable_key
# Subscription Tiers Limits
TIER_FREE_MAX_ACCOUNTS=1
TIER_BASIC_MAX_ACCOUNTS=5
TIER_PRO_MAX_ACCOUNTS=20
TIER_ENTERPRISE_MAX_ACCOUNTS=100
# Email Processing
MAX_EMAILS_PER_RUN=50
CHECK_INTERVAL_MINUTES=5
THROTTLE_EMAILS_PER_MINUTE=10
# Redis
REDIS_URL=redis://localhost:6379/0
CELERY_BROKER_URL=redis://localhost:6379/0
CELERY_RESULT_BACKEND=redis://localhost:6379/0
# Logging
LOG_LEVEL=INFO
# Admin Account (created on first startup)
ADMIN_EMAIL=admin@example.com
ADMIN_PASSWORD=change-this-secure-password
# Application
APP_NAME=POP3 Forwarder SaaS
APP_VERSION=2.0.0
DEBUG=false
HOST=0.0.0.0
PORT=8000
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FROM python:3.11-slim
# Set working directory
WORKDIR /app
# Install system dependencies
RUN apt-get update && apt-get install -y \
gcc \
postgresql-client \
&& rm -rf /var/lib/apt/lists/*
# Copy requirements
COPY requirements.txt .
# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt
# Copy application code
COPY . .
# Create non-root user
RUN useradd -m -u 1000 appuser && \
chown -R appuser:appuser /app
USER appuser
# Default command (can be overridden)
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
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# Alembic configuration for database migrations
[alembic]
# Path to migration scripts
script_location = alembic
# Template used to generate migration files
file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
# Timezone for migration timestamps
timezone = UTC
# Logging configuration
[loggers]
keys = root,sqlalchemy,alembic
[handlers]
keys = console
[formatters]
keys = generic
[logger_root]
level = WARN
handlers = console
qualname =
[logger_sqlalchemy]
level = WARN
handlers =
qualname = sqlalchemy.engine
[logger_alembic]
level = INFO
handlers =
qualname = alembic
[handler_console]
class = StreamHandler
args = (sys.stderr,)
level = NOTSET
formatter = generic
[formatter_generic]
format = %(levelname)-5.5s [%(name)s] %(message)s
datefmt = %H:%M:%S
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"""API v1 package"""
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"""
API v1 router aggregation.
"""
from fastapi import APIRouter
from app.api.v1.endpoints import auth, users, mail_accounts, notifications, subscriptions, admin
api_router = APIRouter()
# Include all endpoint routers
api_router.include_router(auth.router, prefix="/auth", tags=["Authentication"])
api_router.include_router(users.router, prefix="/users", tags=["Users"])
api_router.include_router(mail_accounts.router, prefix="/mail-accounts", tags=["Mail Accounts"])
api_router.include_router(notifications.router, prefix="/notifications", tags=["Notifications"])
api_router.include_router(subscriptions.router, prefix="/subscriptions", tags=["Subscriptions"])
api_router.include_router(admin.router, prefix="/admin", tags=["Admin"])
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"""API v1 endpoints package"""
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"""Admin endpoints"""
from fastapi import APIRouter, Depends
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, func
from app.core.database import get_db
from app.core.deps import get_current_superuser
from app.models.database_models import User, MailAccount, ProcessingRun
router = APIRouter()
@router.get("/stats")
async def get_admin_stats(
current_user: User = Depends(get_current_superuser),
db: AsyncSession = Depends(get_db)
):
"""Get overall system statistics (admin only)"""
# Count users
user_count = await db.execute(select(func.count(User.id)))
total_users = user_count.scalar()
# Count accounts
account_count = await db.execute(select(func.count(MailAccount.id)))
total_accounts = account_count.scalar()
# Count processing runs
run_count = await db.execute(select(func.count(ProcessingRun.id)))
total_runs = run_count.scalar()
return {
"total_users": total_users,
"total_mail_accounts": total_accounts,
"total_processing_runs": total_runs
}
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"""
Authentication endpoints (login, register, OAuth).
"""
from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from datetime import datetime
import logging
from app.core.database import get_db
from app.core.security import verify_password, get_password_hash
from app.models.database_models import User, SubscriptionTier
from app.models.schemas import (
Token, UserCreate, UserResponse, GoogleAuthRequest
)
from app.services.auth_service import oauth_service
router = APIRouter()
logger = logging.getLogger(__name__)
@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def register(
user_in: UserCreate,
db: AsyncSession = Depends(get_db)
):
"""Register a new user with email and password"""
# Check if user exists
result = await db.execute(
select(User).where(User.email == user_in.email)
)
existing_user = result.scalar_one_or_none()
if existing_user:
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Email already registered"
)
# Create new user
user = User(
email=user_in.email,
full_name=user_in.full_name,
hashed_password=get_password_hash(user_in.password) if user_in.password else None,
subscription_tier=SubscriptionTier.FREE,
is_active=True
)
db.add(user)
await db.commit()
await db.refresh(user)
logger.info(f"New user registered: {user.email}")
return user
@router.post("/login", response_model=Token)
async def login(
form_data: OAuth2PasswordRequestForm = Depends(),
db: AsyncSession = Depends(get_db)
):
"""Login with email and password"""
# Get user
result = await db.execute(
select(User).where(User.email == form_data.username)
)
user = result.scalar_one_or_none()
if not user or not user.hashed_password:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Incorrect email or password",
headers={"WWW-Authenticate": "Bearer"},
)
# Verify password
if not verify_password(form_data.password, user.hashed_password):
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Incorrect email or password",
headers={"WWW-Authenticate": "Bearer"},
)
# Check if user is active
if not user.is_active:
raise HTTPException(
status_code=status.HTTP_403_FORBIDDEN,
detail="User account is inactive"
)
# Update last login
user.last_login_at = datetime.utcnow()
await db.commit()
# Create tokens
tokens = oauth_service.create_tokens_for_user(user)
logger.info(f"User logged in: {user.email}")
return tokens
@router.post("/google", response_model=Token)
async def google_oauth(
auth_request: GoogleAuthRequest,
db: AsyncSession = Depends(get_db)
):
"""
Authenticate with Google OAuth2.
Exchange authorization code for access token and user info.
"""
# Get user info from Google
user_info = await oauth_service.get_google_user_info(
code=auth_request.code,
redirect_uri=auth_request.redirect_uri
)
if not user_info.get('verified_email'):
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Email not verified with Google"
)
email = user_info['email']
google_id = user_info['google_id']
# Check if user exists
result = await db.execute(
select(User).where(
(User.email == email) | (User.google_id == google_id)
)
)
user = result.scalar_one_or_none()
if user:
# Update Google ID if not set
if not user.google_id:
user.google_id = google_id
user.oauth_provider = "google"
# Update last login
user.last_login_at = datetime.utcnow()
logger.info(f"Existing user logged in with Google: {user.email}")
else:
# Create new user
user = User(
email=email,
full_name=user_info.get('full_name'),
google_id=google_id,
oauth_provider="google",
subscription_tier=SubscriptionTier.FREE,
is_active=True,
last_login_at=datetime.utcnow()
)
db.add(user)
logger.info(f"New user registered with Google: {user.email}")
await db.commit()
await db.refresh(user)
# Create tokens
tokens = oauth_service.create_tokens_for_user(user)
return tokens
@router.get("/google/authorize-url")
async def get_google_authorize_url(redirect_uri: str):
"""Get Google OAuth2 authorization URL"""
from app.core.config import settings
auth_url = (
f"https://accounts.google.com/o/oauth2/v2/auth?"
f"client_id={settings.GOOGLE_CLIENT_ID}&"
f"response_type=code&"
f"scope=openid%20email%20profile&"
f"redirect_uri={redirect_uri}&"
f"access_type=offline"
)
return {"authorization_url": auth_url}
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"""Mail account management endpoints"""
from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, desc
from app.core.database import get_db
from app.core.deps import get_current_active_user
from app.core.security import encrypt_credential, decrypt_credential
from app.models.database_models import User, MailAccount
from app.models.schemas import (
MailAccountCreate, MailAccountResponse, MailAccountUpdate,
MailAccountTestRequest, MailAccountTestResponse,
MailAccountAutoDetectRequest, MailAccountAutoDetectResponse
)
from app.services.mail_processor import MailProcessor, MailServerAutoDetect
from app.core.config import settings
router = APIRouter()
@router.post("", response_model=MailAccountResponse, status_code=status.HTTP_201_CREATED)
async def create_mail_account(
account_in: MailAccountCreate,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Create a new mail account"""
# Check subscription limits
result = await db.execute(
select(MailAccount).where(MailAccount.user_id == current_user.id)
)
existing_accounts = result.scalars().all()
tier_limits = {
"free": settings.TIER_FREE_MAX_ACCOUNTS,
"basic": settings.TIER_BASIC_MAX_ACCOUNTS,
"pro": settings.TIER_PRO_MAX_ACCOUNTS,
"enterprise": settings.TIER_ENTERPRISE_MAX_ACCOUNTS,
}
max_accounts = tier_limits.get(current_user.subscription_tier.value, 1)
if len(existing_accounts) >= max_accounts:
raise HTTPException(
status_code=status.HTTP_402_PAYMENT_REQUIRED,
detail=f"Account limit reached. Upgrade your subscription to add more accounts."
)
# Encrypt password
encrypted_password = encrypt_credential(account_in.password)
# Create account
account = MailAccount(
user_id=current_user.id,
name=account_in.name,
email_address=account_in.email_address,
protocol=account_in.protocol,
host=account_in.host,
port=account_in.port,
use_ssl=account_in.use_ssl,
use_tls=account_in.use_tls,
username=account_in.username,
encrypted_password=encrypted_password,
forward_to=account_in.forward_to,
is_enabled=account_in.is_enabled,
check_interval_minutes=account_in.check_interval_minutes,
max_emails_per_check=account_in.max_emails_per_check,
delete_after_forward=account_in.delete_after_forward
)
db.add(account)
await db.commit()
await db.refresh(account)
return account
@router.get("", response_model=List[MailAccountResponse])
async def list_mail_accounts(
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""List all mail accounts for current user"""
result = await db.execute(
select(MailAccount)
.where(MailAccount.user_id == current_user.id)
.order_by(desc(MailAccount.created_at))
)
accounts = result.scalars().all()
return accounts
@router.get("/{account_id}", response_model=MailAccountResponse)
async def get_mail_account(
account_id: int,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Get a specific mail account"""
result = await db.execute(
select(MailAccount).where(
MailAccount.id == account_id,
MailAccount.user_id == current_user.id
)
)
account = result.scalar_one_or_none()
if not account:
raise HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail="Mail account not found"
)
return account
@router.put("/{account_id}", response_model=MailAccountResponse)
async def update_mail_account(
account_id: int,
account_update: MailAccountUpdate,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Update a mail account"""
result = await db.execute(
select(MailAccount).where(
MailAccount.id == account_id,
MailAccount.user_id == current_user.id
)
)
account = result.scalar_one_or_none()
if not account:
raise HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail="Mail account not found"
)
# Update fields
update_data = account_update.dict(exclude_unset=True)
if "password" in update_data:
update_data["encrypted_password"] = encrypt_credential(update_data.pop("password"))
for field, value in update_data.items():
setattr(account, field, value)
await db.commit()
await db.refresh(account)
return account
@router.delete("/{account_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_mail_account(
account_id: int,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Delete a mail account"""
result = await db.execute(
select(MailAccount).where(
MailAccount.id == account_id,
MailAccount.user_id == current_user.id
)
)
account = result.scalar_one_or_none()
if not account:
raise HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail="Mail account not found"
)
await db.delete(account)
await db.commit()
@router.post("/test", response_model=MailAccountTestResponse)
async def test_mail_connection(
test_request: MailAccountTestRequest,
current_user: User = Depends(get_current_active_user),
):
"""Test connection to mail server"""
# Create temporary account for testing
temp_account = MailAccount(
user_id=current_user.id,
name="test",
email_address="test@test.com",
protocol=test_request.protocol,
host=test_request.host,
port=test_request.port,
use_ssl=test_request.use_ssl,
use_tls=test_request.use_tls,
username=test_request.username,
encrypted_password="", # Not used for test
forward_to="test@test.com"
)
processor = MailProcessor(temp_account, test_request.password)
success, message = await processor.test_connection()
return MailAccountTestResponse(
success=success,
message=message
)
@router.post("/auto-detect", response_model=MailAccountAutoDetectResponse)
async def auto_detect_mail_settings(
detect_request: MailAccountAutoDetectRequest,
current_user: User = Depends(get_current_active_user),
):
"""Auto-detect mail server settings for an email address"""
suggestions = MailServerAutoDetect.detect(detect_request.email_address)
return MailAccountAutoDetectResponse(
success=len(suggestions) > 0,
suggestions=suggestions
)
@@ -0,0 +1,43 @@
"""Notification configuration endpoints"""
from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from app.core.database import get_db
from app.core.deps import get_current_active_user
from app.models.database_models import User, NotificationConfig
from app.models.schemas import (
NotificationConfigCreate, NotificationConfigResponse, NotificationConfigUpdate
)
router = APIRouter()
@router.post("", response_model=NotificationConfigResponse, status_code=status.HTTP_201_CREATED)
async def create_notification_config(
config_in: NotificationConfigCreate,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Create notification configuration"""
config = NotificationConfig(
user_id=current_user.id,
**config_in.dict()
)
db.add(config)
await db.commit()
await db.refresh(config)
return config
@router.get("", response_model=List[NotificationConfigResponse])
async def list_notification_configs(
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""List all notification configurations"""
result = await db.execute(
select(NotificationConfig).where(NotificationConfig.user_id == current_user.id)
)
return result.scalars().all()
@@ -0,0 +1,35 @@
"""Subscription and payment endpoints"""
from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from app.core.database import get_db
from app.core.deps import get_current_active_user
from app.models.database_models import User, SubscriptionPlan
from app.models.schemas import SubscriptionPlanResponse
router = APIRouter()
@router.get("/plans", response_model=List[SubscriptionPlanResponse])
async def list_subscription_plans(
db: AsyncSession = Depends(get_db)
):
"""List all available subscription plans"""
result = await db.execute(
select(SubscriptionPlan).where(SubscriptionPlan.is_active == True)
)
return result.scalars().all()
@router.get("/current")
async def get_current_subscription(
current_user: User = Depends(get_current_active_user)
):
"""Get current user's subscription details"""
return {
"tier": current_user.subscription_tier,
"status": current_user.subscription_status,
"expires_at": current_user.subscription_expires_at
}
+35
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"""User management endpoints"""
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from app.core.database import get_db
from app.core.deps import get_current_active_user
from app.models.database_models import User
from app.models.schemas import UserResponse, UserDetailResponse, UserUpdate
router = APIRouter()
@router.get("/me", response_model=UserDetailResponse)
async def get_current_user_profile(
current_user: User = Depends(get_current_active_user)
):
"""Get current user profile"""
return current_user
@router.put("/me", response_model=UserDetailResponse)
async def update_current_user_profile(
user_update: UserUpdate,
current_user: User = Depends(get_current_active_user),
db: AsyncSession = Depends(get_db)
):
"""Update current user profile"""
if user_update.email:
current_user.email = user_update.email
if user_update.full_name:
current_user.full_name = user_update.full_name
await db.commit()
await db.refresh(current_user)
return current_user
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"""
Main FastAPI application.
"""
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.trustedhost import TrustedHostMiddleware
from fastapi.responses import JSONResponse
import logging
from app.core.config import settings
from app.api.v1.api import api_router
# Configure logging
logging.basicConfig(
level=getattr(logging, settings.LOG_LEVEL.upper()),
format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)
def create_application() -> FastAPI:
"""Create and configure FastAPI application"""
app = FastAPI(
title=settings.APP_NAME,
version=settings.APP_VERSION,
description="Multi-tenant POP3/IMAP to Gmail forwarder with subscription management",
docs_url="/api/docs",
redoc_url="/api/redoc",
openapi_url="/api/openapi.json"
)
# CORS middleware
app.add_middleware(
CORSMiddleware,
allow_origins=settings.CORS_ORIGINS,
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# Include API router
app.include_router(api_router, prefix=settings.API_V1_PREFIX)
@app.get("/")
async def root():
"""Root endpoint"""
return {
"message": "POP3 Forwarder SaaS API",
"version": settings.APP_VERSION,
"docs": "/api/docs"
}
@app.get("/health")
async def health_check():
"""Health check endpoint for container orchestration"""
return {"status": "healthy"}
@app.on_event("startup")
async def startup_event():
"""Run on application startup"""
logger.info(f"Starting {settings.APP_NAME} v{settings.APP_VERSION}")
logger.info(f"Debug mode: {settings.DEBUG}")
logger.info(f"API documentation: /api/docs")
@app.on_event("shutdown")
async def shutdown_event():
"""Run on application shutdown"""
logger.info("Shutting down application")
return app
app = create_application()
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"""
OAuth2 authentication service for Google and other providers.
"""
from typing import Dict, Any, Optional
from datetime import datetime
import httpx
from authlib.integrations.starlette_client import OAuth
from fastapi import HTTPException, status
import logging
from app.core.config import settings
from app.core.security import create_access_token, create_refresh_token
from app.models.database_models import User
logger = logging.getLogger(__name__)
class OAuthService:
"""OAuth2 authentication service"""
def __init__(self):
self.oauth = OAuth()
self._register_google()
def _register_google(self):
"""Register Google OAuth2 provider"""
if settings.GOOGLE_CLIENT_ID and settings.GOOGLE_CLIENT_SECRET:
self.oauth.register(
name='google',
client_id=settings.GOOGLE_CLIENT_ID,
client_secret=settings.GOOGLE_CLIENT_SECRET,
server_metadata_url='https://accounts.google.com/.well-known/openid-configuration',
client_kwargs={'scope': 'openid email profile'}
)
async def get_google_user_info(self, code: str, redirect_uri: str) -> Dict[str, Any]:
"""
Exchange Google authorization code for user information.
Args:
code: Authorization code from Google
redirect_uri: Redirect URI used in OAuth flow
Returns:
Dict with user information (email, name, google_id)
"""
try:
# Exchange code for token
async with httpx.AsyncClient() as client:
token_response = await client.post(
'https://oauth2.googleapis.com/token',
data={
'code': code,
'client_id': settings.GOOGLE_CLIENT_ID,
'client_secret': settings.GOOGLE_CLIENT_SECRET,
'redirect_uri': redirect_uri,
'grant_type': 'authorization_code'
}
)
if token_response.status_code != 200:
logger.error(f"Google token exchange failed: {token_response.text}")
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Failed to exchange authorization code"
)
token_data = token_response.json()
access_token = token_data.get('access_token')
if not access_token:
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="No access token received"
)
# Get user info
user_info_response = await client.get(
'https://www.googleapis.com/oauth2/v2/userinfo',
headers={'Authorization': f'Bearer {access_token}'}
)
if user_info_response.status_code != 200:
logger.error(f"Google user info fetch failed: {user_info_response.text}")
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Failed to get user information"
)
user_info = user_info_response.json()
return {
'email': user_info.get('email'),
'full_name': user_info.get('name'),
'google_id': user_info.get('id'),
'picture': user_info.get('picture'),
'verified_email': user_info.get('verified_email', False)
}
except HTTPException:
raise
except Exception as e:
logger.error(f"OAuth error: {e}")
raise HTTPException(
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
detail="OAuth authentication failed"
)
@staticmethod
def create_tokens_for_user(user: User) -> Dict[str, str]:
"""
Create access and refresh tokens for a user.
Args:
user: User database model
Returns:
Dict with access_token, refresh_token, and token_type
"""
access_token = create_access_token(data={"sub": user.id})
refresh_token = create_refresh_token(data={"sub": user.id})
return {
"access_token": access_token,
"refresh_token": refresh_token,
"token_type": "bearer"
}
# Global OAuth service instance
oauth_service = OAuthService()
+51
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@@ -0,0 +1,51 @@
"""
Celery application for background email processing tasks.
"""
from celery import Celery
from celery.schedules import crontab
import logging
from app.core.config import settings
logger = logging.getLogger(__name__)
# Create Celery app
celery_app = Celery(
"pop3_forwarder",
broker=settings.CELERY_BROKER_URL,
backend=settings.CELERY_RESULT_BACKEND,
include=["app.workers.tasks"]
)
# Celery configuration
celery_app.conf.update(
task_serializer="json",
accept_content=["json"],
result_serializer="json",
timezone="UTC",
enable_utc=True,
task_track_started=True,
task_time_limit=30 * 60, # 30 minutes
task_soft_time_limit=25 * 60, # 25 minutes
worker_prefetch_multiplier=1,
worker_max_tasks_per_child=1000,
)
# Periodic tasks schedule
celery_app.conf.beat_schedule = {
"process-all-mail-accounts": {
"task": "app.workers.tasks.process_all_enabled_accounts",
"schedule": crontab(minute="*/5"), # Every 5 minutes
},
"cleanup-old-logs": {
"task": "app.workers.tasks.cleanup_old_logs",
"schedule": crontab(hour=3, minute=0), # Daily at 3 AM
},
}
@celery_app.task(bind=True)
def debug_task(self):
"""Debug task to test Celery"""
logger.info(f"Request: {self.request!r}")
return "Celery is working!"
+223
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@@ -0,0 +1,223 @@
"""
Celery tasks for background email processing.
"""
import asyncio
from datetime import datetime, timedelta
from typing import List
from celery import Task
import logging
from app.workers.celery_app import celery_app
from app.core.database import async_session_maker
from app.core.security import decrypt_credential
from app.models.database_models import MailAccount, ProcessingRun, ProcessingLog, AccountStatus
from app.services.mail_processor import MailProcessor
from sqlalchemy import select, and_
from sqlalchemy.ext.asyncio import AsyncSession
logger = logging.getLogger(__name__)
class AsyncTask(Task):
"""Base task class that handles async operations"""
def __call__(self, *args, **kwargs):
"""Run async task in event loop"""
loop = asyncio.get_event_loop()
return loop.run_until_complete(self.run(*args, **kwargs))
@celery_app.task(base=AsyncTask, name="app.workers.tasks.process_mail_account")
async def process_mail_account(account_id: int):
"""
Process a single mail account - fetch and forward emails.
Args:
account_id: ID of mail account to process
"""
async with async_session_maker() as db:
try:
# Get account
result = await db.execute(
select(MailAccount).where(MailAccount.id == account_id)
)
account = result.scalar_one_or_none()
if not account or not account.is_enabled:
logger.warning(f"Account {account_id} not found or disabled")
return
# Create processing run
run = ProcessingRun(
mail_account_id=account.id,
started_at=datetime.utcnow(),
status="running"
)
db.add(run)
await db.commit()
await db.refresh(run)
# Decrypt password
password = decrypt_credential(account.encrypted_password)
# Create processor
processor = MailProcessor(account, password)
# Fetch emails
emails = await processor.fetch_emails(account.max_emails_per_check)
run.emails_fetched = len(emails)
# Forward emails
emails_forwarded = 0
emails_failed = 0
# TODO: Get SMTP config from user settings or environment
smtp_config = {
"host": "smtp.gmail.com",
"port": 587,
"username": "smtp_user@gmail.com", # Should come from config
"password": "smtp_password", # Should come from config
"use_tls": True
}
for email_data in emails:
try:
success = await MailProcessor.forward_email(
email_data,
account.name,
account.forward_to,
smtp_config
)
if success:
emails_forwarded += 1
else:
emails_failed += 1
except Exception as e:
logger.error(f"Error forwarding email: {e}")
emails_failed += 1
# Update run
run.emails_forwarded = emails_forwarded
run.emails_failed = emails_failed
run.completed_at = datetime.utcnow()
run.duration_seconds = (run.completed_at - run.started_at).total_seconds()
run.status = "completed" if emails_failed == 0 else "partial_failure"
# Update account
account.total_emails_processed += emails_forwarded
account.total_emails_failed += emails_failed
account.last_check_at = datetime.utcnow()
if emails_failed == 0:
account.last_successful_check_at = datetime.utcnow()
account.status = AccountStatus.ACTIVE
else:
account.status = AccountStatus.ERROR
account.last_error_at = datetime.utcnow()
account.last_error_message = f"{emails_failed} emails failed to forward"
await db.commit()
logger.info(
f"Processed account {account.id}: "
f"{emails_forwarded} forwarded, {emails_failed} failed"
)
except Exception as e:
logger.error(f"Error processing account {account_id}: {e}")
# Mark run as failed
if 'run' in locals():
run.status = "failed"
run.error_message = str(e)
run.completed_at = datetime.utcnow()
run.duration_seconds = (run.completed_at - run.started_at).total_seconds()
# Update account error status
if 'account' in locals():
account.status = AccountStatus.ERROR
account.last_error_at = datetime.utcnow()
account.last_error_message = str(e)
await db.commit()
@celery_app.task(base=AsyncTask, name="app.workers.tasks.process_all_enabled_accounts")
async def process_all_enabled_accounts():
"""
Process all enabled mail accounts.
This task is scheduled to run periodically.
"""
async with async_session_maker() as db:
try:
# Get all enabled accounts
result = await db.execute(
select(MailAccount).where(
and_(
MailAccount.is_enabled == True,
MailAccount.status.in_([AccountStatus.ACTIVE, AccountStatus.TESTING])
)
)
)
accounts = result.scalars().all()
logger.info(f"Processing {len(accounts)} enabled mail accounts")
# Process each account
for account in accounts:
# Check if it's time to check this account
if account.last_check_at:
time_since_last_check = datetime.utcnow() - account.last_check_at
if time_since_last_check.total_seconds() < (account.check_interval_minutes * 60):
logger.debug(f"Skipping account {account.id} - not time yet")
continue
# Queue processing task
process_mail_account.delay(account.id)
except Exception as e:
logger.error(f"Error processing accounts: {e}")
@celery_app.task(base=AsyncTask, name="app.workers.tasks.cleanup_old_logs")
async def cleanup_old_logs(days_to_keep: int = 30):
"""
Clean up old processing logs and runs.
Args:
days_to_keep: Number of days of logs to retain
"""
async with async_session_maker() as db:
try:
cutoff_date = datetime.utcnow() - timedelta(days=days_to_keep)
# Delete old processing runs
result = await db.execute(
select(ProcessingRun).where(ProcessingRun.started_at < cutoff_date)
)
old_runs = result.scalars().all()
for run in old_runs:
await db.delete(run)
# Delete old processing logs
result = await db.execute(
select(ProcessingLog).where(ProcessingLog.timestamp < cutoff_date)
)
old_logs = result.scalars().all()
for log in old_logs:
await db.delete(log)
await db.commit()
logger.info(
f"Cleaned up {len(old_runs)} old processing runs and "
f"{len(old_logs)} old logs"
)
except Exception as e:
logger.error(f"Error cleaning up logs: {e}")
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@@ -0,0 +1,107 @@
version: '3.8'
services:
# PostgreSQL Database
postgres:
image: postgres:15-alpine
container_name: pop3-postgres
environment:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: password
POSTGRES_DB: pop3_forwarder
ports:
- "5432:5432"
volumes:
- postgres_data:/var/lib/postgresql/data
healthcheck:
test: ["CMD-SHELL", "pg_isready -U postgres"]
interval: 10s
timeout: 5s
retries: 5
# Redis for caching and Celery
redis:
image: redis:7-alpine
container_name: pop3-redis
ports:
- "6379:6379"
volumes:
- redis_data:/data
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 10s
timeout: 5s
retries: 5
# FastAPI Backend
backend:
build:
context: ./backend
dockerfile: Dockerfile
container_name: pop3-backend
ports:
- "8000:8000"
env_file:
- ./backend/.env
depends_on:
postgres:
condition: service_healthy
redis:
condition: service_healthy
volumes:
- ./backend:/app
command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
restart: unless-stopped
# Celery Worker for background email processing
celery-worker:
build:
context: ./backend
dockerfile: Dockerfile
container_name: pop3-celery-worker
env_file:
- ./backend/.env
depends_on:
- postgres
- redis
- backend
volumes:
- ./backend:/app
command: celery -A app.workers.celery_app worker --loglevel=info
restart: unless-stopped
# Celery Beat for scheduling
celery-beat:
build:
context: ./backend
dockerfile: Dockerfile
container_name: pop3-celery-beat
env_file:
- ./backend/.env
depends_on:
- postgres
- redis
- backend
volumes:
- ./backend:/app
command: celery -A app.workers.celery_app beat --loglevel=info
restart: unless-stopped
# Frontend (React/Next.js) - to be implemented
# frontend:
# build:
# context: ./frontend
# dockerfile: Dockerfile
# container_name: pop3-frontend
# ports:
# - "3000:3000"
# depends_on:
# - backend
# volumes:
# - ./frontend:/app
# - /app/node_modules
# restart: unless-stopped
volumes:
postgres_data:
redis_data: