How to process received images in iChat/Messages with Applescript

Question

Hello!
I want to process all received photos or videos with Applescript.
I try this:
using terms from application "Messages"
          on message received theMessage from theBuddy for theChat
                    if the length of theMessage is 0 then
  -- it means I received a picture or video file, but I can't get the file with Applescript, because theMessage is an empty string and not a file
                              set theMessage to "<lost photo or video content>"
                    else
  -- it's OK, I just got a text message and I can now save it or display or do something else with it
                    end if
          end message received
end using terms from
But if I receive a photo, theMessage is empty.
The event handlers "on completed file transfer" and "received file transfer invitation" don't work in this case, probably because it is not a file tranfer, but sort of an inline picture.
I use OS X 10.8.
Can somebody help me?

Answer 1

I have a similar question as well. I tried this for you and nothing happened.
on received file transfer invitation theFileTransfer
end received file transfer invitation
I think "completed file transfer" is regarding to the file being transfered to Apple's Server from your computer when a file is sent, but I'm not sure about "received file transfer invitation." Regarding it being an inline file, maybe try using the attachment class.
attachment n [inh. rich text] : Represents an inline text attachment. This class is used mainly for make commands.
elements
contained by rich text, characters, paragraphs, words, attribute runs.
properties
file (file, r/o) : The path to the file for the attachment  syn file name