mediawiki-extensions-Relate.../resources/ext.relatedArticles.readMore.gateway/RelatedPagesGateway.js
Timo Tijhof 8becbc2b23 Omit 'wgRelatedArticles' from page view HTML when empty
* The extension already uses 'null' as placeholder in RelatedArticles
  instead of empty array. Update the doc comment in RelatedPagesGateway
  to reflect this (its code was already using the default operator
  to fallback to empty array, given empty arrays are not falsey in JS,
  but null is).

* Omit the key from the mw.config output in <head> on page views,
  when the value is null, given this is redundant information and consumes
  additional space.

Bug: T219342
Change-Id: I367f9d9423d66611d73d56f8a769d86d14d3de8b
2019-05-26 13:49:16 +01:00

115 lines
3.6 KiB
JavaScript

( function () {
// FIXME: Move into separate file as this module becomes larger.
mw.relatedPages = {};
/**
* @class RelatedPagesGateway
* @param {mw.Api} api
* @param {string} currentPage the page that the editorCuratedPages relate to
* @param {Array|null} editorCuratedPages a list of pages curated by editors for the current page
* @param {boolean} useCirrusSearch whether to hit the API when no editor-curated pages are available
* @param {boolean} [onlyUseCirrusSearch=false] whether to ignore the list of editor-curated pages
*/
function RelatedPagesGateway(
api,
currentPage,
editorCuratedPages,
useCirrusSearch,
onlyUseCirrusSearch
) {
this.api = api;
this.currentPage = currentPage;
this.useCirrusSearch = useCirrusSearch;
if ( onlyUseCirrusSearch ) {
editorCuratedPages = [];
}
this.editorCuratedPages = editorCuratedPages || [];
}
OO.initClass( RelatedPagesGateway );
/**
* @ignore
* @param {Object} result
* @return {Array}
*/
function getPages( result ) {
return result && result.query && result.query.pages ? result.query.pages : [];
}
/**
* Gets the related pages for the current page.
*
* If there are related pages assigned to this page using the `related`
* parser function, then they are returned.
*
* If there aren't any related pages assigned to the page, then the
* CirrusSearch extension's {@link https://www.mediawiki.org/wiki/Help:CirrusSearch#morelike: "morelike:" feature}
* is used. If the CirrusSearch extension isn't installed, then the API
* call will fail gracefully and no related pages will be returned.
* Thus the dependency on the CirrusSearch extension is soft.
*
* Related pages will have the following information:
*
* * The ID of the page corresponding to the title
* * The thumbnail, if any
* * The Wikidata description, if any
*
* @method
* @param {number} limit of pages to get. Should be between 1-20.
* @return {jQuery.Promise}
*/
RelatedPagesGateway.prototype.getForCurrentPage = function ( limit ) {
var parameters = {
action: 'query',
formatversion: 2,
prop: 'pageimages|description',
piprop: 'thumbnail',
pithumbsize: 160 // FIXME: Revert to 80 once pithumbmode is implemented
},
// Enforce limit
relatedPages = this.editorCuratedPages.slice( 0, limit );
if ( relatedPages.length ) {
parameters.pilimit = relatedPages.length;
parameters.continue = '';
parameters.titles = relatedPages;
} else if ( this.useCirrusSearch ) {
parameters.pilimit = limit;
parameters.generator = 'search';
parameters.gsrsearch = 'morelike:' + this.currentPage;
parameters.gsrnamespace = '0';
parameters.gsrlimit = limit;
parameters.gsrqiprofile = 'classic_noboostlinks';
// Currently, if you're logged in, then the API uses your language by default ard so responses
// are always private i.e. they shouldn't be cached in a shared cache and can be cached by the
// browser.
//
// By make the API use the language of the content rather than that of the user, the API
// reponse is made public, i.e. they can be cached in a shared cache.
//
// See T97096 for more detail and discussion.
parameters.uselang = 'content';
// Instruct shared caches that the response will become stale in 24 hours.
parameters.smaxage = 86400;
// Instruct the browser that the response will become stale in 24 hours.
parameters.maxage = 86400;
} else {
return $.Deferred().resolve( [] );
}
return this.api.get( parameters )
.then( getPages );
};
mw.relatedPages.RelatedPagesGateway = RelatedPagesGateway;
}() );