check if an article has been published before

Hi All,

I am writing some integration code that uses XML-RPC incoming and then a flatfile process queue for outgoing data (just post ID’s)

The code does the following

– On creating a post, a file is updated with post ID
– file is picked up by cron and creates forum threads
– If post is moved from publish to draft, another file it created
– Cron job then makes forum thread inactive

What I need to write now, is that when a post is moved from draft to publish, if the post has previously been published, then I want to update the file with another flag.

Is there any hook or flag within a hook that can check if it has been published before?

Looking at the $post array that I pass to the function, it doesn’t have a published date, so I can not use this as an indicator

Dan