Facebook Like thru scanning QR that connects to WiFi

First of ALL, I'm not sure if is possible to be done. So if coder accept the project is because he assume the risk been sure he/she could do it. Visitors need to create an account which will include: + Facebook details for business fan page. + WiFi store details, so as name, password and needed info. I could be more than 1 store, example 100 or more. All linked to the same fan page. + To activate service will need to make payment paypal, credir card or other. Price is according to pre-establish prices by admin user, depending on Likes to get. We want that visitors of the store scan the QR code using WiFiQR, but instant after scanning it need to do at least 3 things: 1.- Give Access to the store WiFi, this is the easy part because that is exactly what WiFiQR do. 2.- Will Registry in the database that 1 new fan get access to the WiFi. 3.- Will give a LIKE to the fan page linked to the QR of the store. The part that make us not sure if is possible is that WiFiQR didn't have a 2nd step. After getting access to WiFi they stop. Here the deal is to share the WiFi ONLY if visitor gives a LIKE. And je can't give a LIKE before getting connected because he probabbly didn't have internet access, that is why is interested in getting the WiFi.