Business Module Documentation

Purpose

The Business module serves as the customer-facing component of the Evolve Platform, handling:

• Customer registration and profile management
• Software product subscriptions and billing
• Product access and usage tracking
• Customer support and communication
• Integration with payment systems

App/business/

App/business/
├── __init__.py
├── admin.py                    # Django admin configuration
├── apps.py                     # App configuration
├── models.py                   # Business data models
├── views.py                    # Business view controllers
├── urls.py                     # URL routing
├── serializers.py              # API serializers
├── forms.py                    # Django forms
├── managers.py                 # Custom model managers
├── utils.py                    # Business utility functions
├── signals.py                  # Django signals
├── tasks.py                    # Background tasks
├── tests/
│   ├── test_models.py          # Model tests
│   ├── test_views.py           # View tests
│   ├── test_api.py             # API tests
│   └── test_utils.py           # Utility tests
├── management/
│   └── commands/               # Management commands
├── migrations/                 # Database migrations
└── templates/business/         # Business templates

Customer Management

• Registration: Handle new business customer sign-ups
• Profile Management: Manage company information and user profiles
• Verification: Verify business credentials and documentation
• KYC Compliance: Ensure know-your-customer compliance

Subscription Management

• Plan Selection: Allow customers to choose subscription plans
• Billing Cycles: Manage monthly/yearly billing cycles
• Payment Processing: Handle subscription payments
• Plan Changes: Support upgrades and downgrades

Product Access

• Feature Access: Control access to product features based on plan
• Usage Tracking: Monitor product usage and limits
• Multi-tenant Support: Ensure data isolation between customers

Business Model

Main model representing business customers:

class Business(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    business_name = models.CharField(max_length=200)
    business_email = models.EmailField()
    industry = models.CharField(max_length=100)
    company_size = models.CharField(max_length=20)
    country = models.CharField(max_length=50)
    postal_code = models.CharField(max_length=20)
    subscription_status = models.CharField(max_length=20)
    created_at = models.DateTimeField(auto_now_add=True)

Subscription Model

Manages customer subscriptions:

class Subscription(models.Model):
    business = models.ForeignKey(Business, on_delete=models.CASCADE)
    plan = models.ForeignKey(Plan, on_delete=models.CASCADE)
    status = models.CharField(max_length=20)
    start_date = models.DateTimeField()
    end_date = models.DateTimeField()
    auto_renewal = models.BooleanField(default=True)

Plan Model

Defines available subscription plans:

class Plan(models.Model):
    name = models.CharField(max_length=100)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    yearly_price = models.DecimalField(max_digits=10, decimal_places=2)
    description = models.TextField()
    features = models.JSONField()
    max_users = models.IntegerField()
    storage_limit = models.BigIntegerField()

Business Profile APIs

Subscription APIs

Usage & Billing APIs

Business Services

• CustomerService: Handles customer registration and verification
• SubscriptionService: Manages subscription lifecycle
• BillingService: Handles billing and payment processing
• UsageTrackingService: Monitors product usage and limits
• NotificationService: Sends customer notifications

Adding New Features

• Always consider multi-tenancy when adding new features
• Implement proper access controls and permissions
• Add usage tracking for billable features
• Ensure backward compatibility with existing subscriptions

Billing and Payments

• Always use transactions for billing operations
• Implement idempotency for payment operations
• Log all financial transactions for audit purposes
• Handle payment failures gracefully

Data Security

• Encrypt sensitive business data at rest
• Implement proper data isolation between customers
• Regular security audits and penetration testing
• GDPR compliance for data protection

Testing

• Write comprehensive tests for billing logic
• Test multi-tenant data isolation
• Mock external payment services in tests
• Load test subscription management endpoints