Basically, the user clicks on a "Book" button, which is in a "Trip" node; the user then is redirected to a booking form (Webform) where he will fill in basic info for the reservation. I need to auto-fill a field in the form with the title of the node from where the user was redirected.
I tried to use the Rules module and I successfully made the redirection process, but I'm stuck on how to prepopulate the field with the title of the sender page.
I've never developed a custom module, I'm new to Drupal but I have programming experience, so if there is a straight way to accomplish this (contrib modules) that would be great. Alternatively, I'm not afraid of digging into code.