WebAPI: Add "private" filter for 'info' endpoint

[ManiMatter]

It is already possible to filter the "info" response by hashes, status, tag, category.
Since the "isPrivate" flag has been added in #20686, it would be nice if it was possible to also pre-filter the response by this attribute.

I have - to the best of my abilities - implemented the code, but it is at the edge of my skills and I would appreciate your review.

The failed checks seem macOS related and affecting any PRs right now, thus not triggered by the changes I propose here

[ManiMatter]

@glassez Thanks having included this on milestone 5.0, and for having reviewed the code. I was not able to figure out how to test whether the feature works properly. Just wanted to check if you had a chance to test if it actually works?

Many thanks

[ManiMatter]

@glassez - quick question, do I need to do anything here to get this merged?

[glassez]

@glassez - quick question, do I need to do anything here to get this merged?

At least it should be confirmed by someone from the team (or maybe by couple of other people) that it works as intended.

[ManiMatter]

Thank you for the fast response. I unfortunately did not figure out how to build a docker image from the code so that I could test it myself.

Did you test it on your end by any chance? If so, did it work?

Looking forward for the other people to test it (guess that is done via qbittorrent/web-developers ?)

[ManiMatter]

@Chocobo1 - many thanks for your review. I incorporated your changes.

Regarding renaming: I am not sure I understand your suggestion to rename the "isPrivate" to "private" in the various places. Since the flag that is returned currently in the properties is called "isPrivate", I feel it makes sense to keep calling it like this, rather than changing to "private". What was your thinking when suggesting the rename?

In terms of functionality, did the feature work for you as expected?

[ManiMatter]

Thx for the commit, @glassez , much appreciated

[Chocobo1]

@ManiMatter
From #20833 (comment)

Regardless, you should increment API_VERSION in webapplication.h due to other changes.

[ManiMatter]

@ManiMatter From #20833 (comment)

Regardless, you should increment API_VERSION in webapplication.h due to other changes.

done