System Architecture

DocuPulse employs a sophisticated multi-tenant architecture designed for scalability, security, and maintainability. The system is built on a modular blueprint structure with clear separation of concerns, comprehensive event logging, and robust permission management.

Architecture Layers
Presentation Layer
  • • Bootstrap 5 responsive UI
  • • JavaScript ES6+ client logic
  • • Jinja2 templating engine
  • • AJAX-based real-time updates
  • • Progressive enhancement
  • • Mobile-first design
Application Layer
  • • Flask 2.0+ web framework
  • • Blueprint-based routing
  • • RESTful API endpoints
  • • CSRF protection
  • • Session management
  • • Error handling
Business Logic Layer
  • • User authentication & authorization
  • • File management operations
  • • Permission system (7 levels)
  • • Event logging & notifications
  • • Email template system
  • • Multi-tenant isolation
Data Access Layer
  • • SQLAlchemy ORM
  • • PostgreSQL database
  • • Alembic migrations
  • • Connection pooling
  • • Transaction management
  • • Query optimization
Multi-Tenant Architecture
Master Instance
  • • Central orchestration hub
  • • Instance management & monitoring
  • • Health status tracking
  • • Automated deployment via Docker
  • • API-based communication
  • • Resource allocation management
Tenant Instances
  • • Isolated data & storage
  • • Independent user management
  • • Custom configurations
  • • Separate database instances
  • • Unique domain/subdomain
  • • Scalable resource limits
Blueprint Structure
Core Modules
main.py - Dashboard & navigation
auth.py - Authentication system
rooms.py - Room management
room_files.py - File operations
conversations.py - Messaging
room_members.py - Member management
Administrative Modules
admin.py - Admin dashboard
admin_api.py - Admin API endpoints
launch_api.py - Instance deployment
contacts.py - Contact management
trash.py - Trash management
email_templates.py - Email system
Security Architecture
Authentication & Authorization
  • • Flask-Login session management
  • • Password hashing with Werkzeug
  • • CSRF token protection
  • • JWT for API authentication
  • • Role-based access control
  • • Granular permission system
Data Protection
  • • SQL injection prevention
  • • XSS protection
  • • File upload validation
  • • Secure file storage
  • • Audit logging
  • • Data encryption at rest
Event-Driven Architecture

Comprehensive event logging system with 30+ event types for audit trails and system monitoring.

User Events
  • • Login/logout tracking
  • • Account creation/modification
  • • Password changes
  • • Profile updates
File Events
  • • Upload/download tracking
  • • File modifications
  • • Deletion/restoration
  • • Permission changes
Room Events
  • • Room creation/deletion
  • • Member management
  • • Permission updates
  • • Settings changes
System Events
  • • Configuration changes
  • • Email notifications
  • • Error logging
  • • Performance metrics
Architecture Flow
Client Layer
Browser/API Client
Web Server
Gunicorn + Flask
Application Layer
Business Logic
Data Layer
PostgreSQL
Design Patterns
Blueprint Pattern
Decorator Pattern
Repository Pattern
Observer Pattern
Factory Pattern
Chain of Responsibility
Scalability Features
Containerization - Docker-based deployment
Connection Pooling - Database optimization
Load Balancing - Multi-instance support
Monitoring - Health checks & metrics
Caching - Asset versioning & CDN ready
Horizontal Scaling - Multi-tenant isolation