A common problem I am facing is to connect a Magento shop to an Enterprise Resource Planning system (ERP). For almost every ERP I encounter there is no ready to use extension. So I would have to write an extension doing standard data exchange like:
- export to ERP: incoming orders, costumers and product quantity
- cronjob update product quantity from ERP query
Of course the ERP API is always different but the Magento part is always the same; Register to events, query shop data, create cronjob, ...
I know about tutorials on how to write an extension in general, but how can I get started and which are the basic options for this specific task?