How to Check if user has already submitted form?
I'm using the Form block object and I'd like to be able to check if the user has already completed the form. I've been scratching my head for a while and can't really come up with an easy solution to this problem.
The user will not be logged in (actually I'm showing the form in an Iframe on Facebook) - so I need to either do a session check and then somehow disable the form (I already have a custom template in place, so I could potentially do it there) OR I would grab the users facebook ID and compare it to what is saved in Reports from my form. Problem is, I can't seem to figure out how to access submitted form data from PHP.
Any suggesions or thoughts out there? I'd like to avoid using sessions as they are a PITA when it comes to C5 in my experience.
Thank you for your eyeballs and brainpower :)