Website Flow

1. Public Endpoints

Endpoint	Auth	Description
GET /saas/plans	Public	Browse all published plans with period filtering
GET /saas/plans/\<url_string>	Public	Configure a specific plan (packages, add-ons, period)
POST /saas/plans/configure/save	Public	Save configuration to session (AJAX)
POST /saas/plans/configure/price	Public	Live price calculation with breakdown (AJAX)
GET /saas/plans/domain	User	Subdomain selection page
POST /saas/plans/domain/check	User	Check subdomain availability (AJAX)
GET /saas/plans/checkout	User	Order summary and checkout page
POST /saas/plans/checkout/confirm	User	Submit order, create sale order, redirect to payment
GET /saas/plans/confirmation/\<order_id>	User	Post-payment confirmation page

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2. Subdomain Validation

When checking subdomain availability, the system validates:

• Minimum 3 characters
• Only alphanumeric characters and hyphens
• Not already used by any subscription
• Not already used by any stage
• Not in the reserved domains list

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3. Session-Based Configuration

The plan configuration is stored in the browser session, allowing customers to:

• Switch between periods without losing selections
• Navigate away and return to their configuration
• Restore their configuration on page reload

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4. Payment Integration

After checkout confirmation:

1. A sale.order is created with the plan product and total price
2. A payment link is generated via payment.link.wizard
3. Customer is redirected to the payment page
4. On successful payment, the sale order triggers subscription creation