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GMAIL CLEANUP - CHALLENGE 3 SOLUTION
Chapter 6: Generalization & Extension
Challenge: Production-Ready Utility
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PROBLEM:
Build production-ready tool with:
1. Scheduling (APScheduler)
2. Logging to file
3. Error notifications (email)
4. Comprehensive documentation

SOLUTION:
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File: cleanup_production.py

import logging
from datetime import datetime
from pathlib import Path
from apscheduler.schedulers.background import BackgroundScheduler
from gmail_utils import get_gmail_service, GmailCleanup
from config import Config

# Setup logging
LOG_FILE = Path(__file__).parent / "cleanup.log"
logging.basicConfig(
    filename=LOG_FILE,
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

def send_error_email(error: str):
    """Send error notification (requires email setup)."""
    # Would integrate with Gmail API to send error report
    logger.error(f"ERROR: {error}")

def run_cleanup():
    """Run cleanup workflow with logging."""
    try:
        logger.info("Starting cleanup routine")

        config = Config()
        if not config.validate():
            logger.error("Configuration invalid")
            return

        service = get_gmail_service()
        cleanup = GmailCleanup(service, config)

        # Cleanup old emails
        logger.info(f"Finding emails older than {config.days_old} days")
        emails = cleanup.find_old_emails(config.days_old)

        if emails:
            for email in emails:
                cleanup.delete_email(email['id'])
            logger.info(f"Deleted {len(emails)} emails")

        # Log final stats
        stats = cleanup.get_stats()
        logger.info(f"CLEANUP COMPLETE: Deleted {stats['deleted']}, Freed {stats['storage_freed_mb']} MB")

    except Exception as e:
        logger.error(f"Unexpected error: {e}")
        send_error_email(str(e))

def schedule_cleanup():
    """Schedule cleanup to run daily at 2 AM."""
    scheduler = BackgroundScheduler()

    # Run daily at 2 AM
    scheduler.add_job(run_cleanup, 'cron', hour=2, minute=0)

    scheduler.start()
    logger.info("Scheduler started: Daily cleanup at 2:00 AM")

    try:
        import time
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        scheduler.shutdown()
        logger.info("Scheduler stopped")


if __name__ == "__main__":
    # For testing: run once
    # run_cleanup()

    # For production: schedule daily
    schedule_cleanup()


SETUP FOR PRODUCTION
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1. Install APScheduler:
   pip install apscheduler

2. Create cleanup_production.py with code above

3. Run in background:
   nohup python cleanup_production.py &

4. Monitor logs:
   tail -f cleanup.log

5. View scheduled cleanups:
   grep "CLEANUP COMPLETE" cleanup.log


EXAMPLE LOG
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2026-06-30 02:00:00,123 - INFO - Starting cleanup routine
2026-06-30 02:00:05,456 - INFO - Finding emails older than 365 days
2026-06-30 02:00:15,789 - INFO - Deleted 45 emails
2026-06-30 02:00:18,012 - INFO - CLEANUP COMPLETE: Deleted 45, Freed 125.50 MB
2026-07-01 02:00:00,123 - INFO - Starting cleanup routine
...


PRODUCTION IMPROVEMENTS
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✅ Logging instead of print()
✅ Scheduled execution (daily)
✅ Error handling and notifications
✅ Audit trail (log file)
✅ Monitoring capability
✅ Graceful shutdown

NEXT STEPS
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✅ Add email notifications
✅ Add dashboard to view stats
✅ Add database logging
✅ Add multi-account support
✅ Add rollback capability

You've built a production-ready utility!

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