When no related articles have been specified by an editor we instead
hit request pages similar to the current page using the CirrusSearch
extension's "morelike:" feature [0].
Changes:
* Config variable introduced RelatedArticlesUseCirrusSearch which allows
you to turn on use of the CirrusSearch API.
* Introduce a RelatedPagesGateway for dealing with making the API call
and returning consistent results
* Move the "simple" API call for hydrating related pages fetched from
the wgRelatedArticles configuration variable into RelatedPagesGateway
* Reduce the bootstrap module to just a bootstrap module!
Bug: T116707
Change-Id: Ia0ced1d7ae57c0939d1f5af275aa9d393f1420b1
If the page has related articles, is in mainspace, isn't the main page,
and the output is being rendered with the MinervaBeta skin then a
"Related Articles" section is added to the page just before the footer.
Separate loading the information necessary to render the pages, choosing
the renderer, and rendering the data so that multiple skins - currently
Minerva and Vector per the mocks - not just multiple resolutions can all
be handled the same way:
* The bootstrap script (ext.relatedArticles.readMore.bootstrap/index.js)
for fetches the page image and Wikidata description; loading the
renderer module; and, finally, notifying the renderer module that it
should render the data, which it does by emitting
"ext.relatedArticles.readMore.init" event using mw#track
* The Minerva renderer subscribes to the event and, when it's fired,
renders the data by passing it to the WatchstarPageList view
Bug: T113635
Change-Id: I651342bdf9796938fa7051828dd13bc6fe774783
