Account Invoice Google Document Ai Purchase

When a supplier invoice is scanned with Google Document AI, this module adds the ability to recognise a purchase order number on the document and on each invoice line.

• It looks for purchase orders whose number matches the scanned value, that are in 'purchase' or 'done' state and still waiting to be invoiced, and that belong to the same commercial partner as the invoice.
• If a matching purchase order is found, the invoice is filled in from that purchase order (the purchase order is set on the invoice).
• If no matching purchase order is found, a message is added saying that the purchase order cannot be processed.
• When the company cannot be determined from the scanned data, it is taken from the matched purchase orders if they all belong to the same company.

The module works automatically in the background as part of the invoice scanning flow; it does not add its own menus or screens. It extends the existing account.move.google.document.ai model and relies on the purchase app, so it only activates when both the Google Document AI invoice module and the Purchase app are installed.