Invoice orders with done payment transactions

This module changes when a sales order line becomes invoiceable. Normally, if a product is configured to be invoiced on delivered quantities, you must validate the delivery before you can create the invoice. With this module, once the order has a confirmed (done) payment transaction, the line can be invoiced for its full ordered quantity without waiting for the delivery.

The rule applies only when all of these are true: - the line belongs to a confirmed sales order; - the order is considered paid (it has a done payment transaction); - the delivery of that line has not started yet (no done or cancelled stock move).

When these conditions are met, the quantity to invoice is set to the ordered quantity minus what is already invoiced, and the untaxed amount to invoice is recalculated accordingly, including tax-included prices. If the delivery has already started, the normal behaviour applies.

There is no new menu or screen: the change is visible in the sales order lines' invoicing information and in the amounts shown as ready to invoice. It touches the sales order line model sale.order.line and reacts to changes in the payment transaction status of the order.