Adium / Applescript : How to send a specific response to a specific message

I'm not really familiar with Applescript....but if this would be easy for someone to whip up real quick, I'd be very appreciative.

I've looked around and not seen any examples of an Applescript for Adium where the script takes the message sent by a particular user as input.

I'd want the applescript to do something to the affect of:

If username is "someuser" (or really any user, for that matter), and they send a message where the complete message text is "test123" (and no other text), the script makes me automatically respond with "test received".

or, If the text is "are you there?" , the response is "not now".

just a script that checks for 2 conditions and responds with a specific response for each condition if it is met.

The conditions are mutually exclusive (for example, if the complete message text sent is "test123", by definition it cannot be "are you there?")

Any help appreciated.

Thanks.