Redmine

hey,

I want to write a small script that will generate svn authz file from redmine.
Basically what I want, is to :
- fetch all repositories
- get projects assigned to those repositories
- get all users assigned to those projects that are >reporter
- output a file from it.

Any script for a starting point here? I can do it manually in perl via mysql, but it would be nicer to write it in ruby and use ORM that is inside there (i presume), so I am just asking.
I am a ZendFramework coder so... just a hint what to include/where to look should be enough :)

Thanks!