TYPO3: Upload files to FAL with powermail

I am using powermail to allow a FE-User to edit a couple of fields of his own User-Record. Works fine, no hassle.

Now I would also like to allow the upload of a file. Is there a way to save the file to FAL with powermail? Unfortunately I have found no resources on this whatsoever. Maybe it is possible to implement a userfunc when saving to DB that would generate the required DB entries? When using powermails "upload"-field-type the file gets written to uploads/tx_powermail. I have access to that files path in my db_entry step in typoscript and could pass it on to a userfunc - which in return should

• generate the sys_file entry
• delete a possiblibly already existing sys_file_reference
• generate the new sys_file_reference

Am I missing something? Any ideas on this? Has anyone done something like this before?

Or is my only alternative to switch from powermail to a custom extbase extension?

System: TYPO3 7.6.16, Powermail 3.17

Thanks

At the moment powermail don't uses FAL relations. If you need something like this, you have to add an own finisher that does the upload stuff - see https://docs.typo3.org/typo3cms/extensions/powermail/ForDevelopers/AddFinisherClasses/Index.html