Bug 52343 - Invalidate navbar cache when JSON is edited

If you are creating the navigation bar in php; that means it gets cached for logged out users; which means that you would have to invalidate all constituent pages in a book every time the json changes

This can be done using

Title::makeTitle(1, 'foo')->purgeSquid()

Find the details in the bug report above. You can also ask any questions there, where not only GCI mentors but also the maintainers of the application can help you.

Background:

https://www.mediawiki.org/wiki/Extension:BookManager

https://git.wikimedia.org/summary/?r=mediawiki/extensions/BookManagerv2.git

Students are required to read Wikimedia's general instructions first. Patches should be submitted to Gerrit and reference the bug report in the commit message.