[Mediawiki-l] search extension

[aretai aretai]

Hi all,

I thought of an extension displaying the results of a search. For example
user puts <search>mediawiki</search> and gets:

 MediaWiki/ <http://www.mediawiki.org/wiki/MediaWiki/>
Relevance: 100.0% - -
Mediawiki <http://www.mediawiki.org/wiki/Mediawiki>
Relevance: 100.0% - -
Extension:Writer2MediaWiki<http://www.mediawiki.org/wiki/Extension:Writer2MediaWiki>
Relevance: 62.0% - -
....

(Results of such search on Mediawiki.org).

It may be useful for example for saving searches - i.e. user performs given
searches (or set of searches) on a frequent basis.

Does anyone know whether there exist any extension like that.

I also thought of writing my own extension to support such searches - where
is the best place to start?

Regards,
Aretai