On Fri, Apr 10, 2020 at 11:41 AM Guillaume Lederrey <glederrey@wikimedia.org> wrote:
Routing to discovery@ where all the search people are.

On Fri, Apr 10, 2020 at 2:43 PM Kaartic Sivaraam <kaarticsivaraam91196@gmail.com> wrote:

Is there any MediaWiki API that could be used for a proper
case-insensitive category title search? Or is this still something that
doesn't exist yet?

To my knowledge this is something that doesn't exist yet. 

For some context, I'm asking this for a feature request[1] in the
Commons Android app that asks for a case insensitive category title
search. In case you're wondering where category search comes into
picture in the app, adding appropriate categories for an image is part
of the upload flow.

I wonder that such an API doesn't exist yet for the following reasons:

A) The exhaustive search for such an API wasn't fruitful. The closest we
got was using `generator=search` with `srsearch=intitle:$SEARCH_TERM`
and `srnamespace=14` (14 is the id for category namespace in Commons).
But it's not a proper category search as it is essentially a search for
pages existing in Category namespace. See [2] for why it's not a proper
category search. 
B) I saw "T59302 Suggest case insensitive results when searching for
categories to add"[3] which is still open. In particular the comment in
the ticket pointed to by [4].

This all seems correct to me. The comment linked here ([4]) still holds true today,  to perform this search we would need to add lowercased prefix indices somewhere.

So, is my understanding that an API for case-insensitive category title
search doesn't exist correct? Or am I missing something?

[1]: https://github.com/commons-app/apps-android-commons/issues/3179
[2]: https://phabricator.wikimedia.org/T59302#2707969
[3]: https://phabricator.wikimedia.org/T59302
[4]: https://phabricator.wikimedia.org/T59302#3977813

Hoping you're safe,

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Guillaume Lederrey
Engineering Manager, Search Platform
Wikimedia Foundation
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