Sale Order Action Invoice Create Hook

When you create invoices from sales orders, Odoo normally groups invoice lines by sales order. This module changes that: it groups lines by the customer's invoice address and currency, so lines from different sales orders for the same customer and currency can end up on the same invoice.

It also adds several hook points that developers can use to customize the behavior without modifying the core code. For example, you can change the grouping key, decide which draft invoices to consider, or modify the invoices after they are created.

The module keeps the original logic for creating invoice lines, handling sections and notes, and managing refunds. It also posts a message on the invoice linking it to the originating sales orders.

This affects the sale.order and sale.order.line models. No new menus or screens are added; the change is visible when you use the standard 'Create Invoice' button on a sales order.