How to translate a simple program with selection screen into a fiori elements app (using RAP)

[rammel_sapdev]

Hi,

We all have some foreground programs which has few selection fields like file upload and few or more fields which doesn't exactly translate into any of the RAP BO apps. Currently, this program reads a file, uses the fields in the selection screen for sending email, and uses the file to create BDC.

How do you usually re-create these kind of programs into a fiori app in S4H public/private cloud? If we go we unmanaged transaction app, that means we need to create some dummy tables to represent a dummy BO. Also, when you open the fiori app, the are unnecessary screen like the overview page/list. 

We wanted to use RAP as much as possible and enhance it via flexible programming but I feel like it is easier to create a separate freestyle app instead and call an HTTP service to process the file.