Auto Generate invoice and print it via Google Cloud Print - Opencart - Repost -- 2

Hello Freelancers, We need a solution for our Opencart store that will auto generate the invoice when customer places the order. After generating the invoice, the system has to send the invoice to Google Cloud Print. The system will generate and send the invoice only if the products ordered are available in stock. What we need? I will try to explain it: 1. Customer places order: - Products are not in stock: System does nothing. - Products are in stock -> System auto generates invoice -> System sends invoice to Google Cloud Print. A similar solution has been already released before, only that the developer has abandoned the project. The solution was called UBER AUTO PRINT and you can search it on Google. Our Open Cart version is 1.5.6.4.