pageviews.js
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pageviews.js
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	/**
	* @module changeListeners/pageviews
	* @private
	*/

	/**
	* Creates an instance of the pageviews change listener.
	*
	* When a pageview enqueued it'll be logged using the VirtualPageView schema.
	* Note, it's the responsibility of Event Logging (and the UA) to
	* deliver logged events.
	*
	* @param {Object} boundActions
	* @param {EventTracker} pageviewTracker
	* @return {ext.popups.ChangeListener}
	*/
	export default function pageviews(
	boundActions, pageviewTracker
	) {
	return ( oldState, newState ) => {
	let page, pageview;
	if ( newState.pageviews && newState.pageviews.pageview && newState.pageviews.page ) {
	page = newState.pageviews.page;
	pageview = newState.pageviews.pageview;
	pageviewTracker( 'event.VirtualPageView', {
	/* eslint-disable camelcase */
	source_page_id: page.id,
	source_namespace: page.namespaceId,
	source_title: page.namespaceId === -1 ?
	mw.config.get( 'wgCanonicalSpecialPageName' ) :
	mw.Title.newFromText( page.title ).getPrefixedDb(),
	source_url: page.url,
	page_id: pageview.page_id,
	page_namespace: pageview.page_namespace,
	page_title: mw.Title.newFromText( pageview.page_title ).getPrefixedDb()
	/* eslint-enable camelcase */
	} );
	// Clear the pageview now its been logged.
	boundActions.pageviewLogged();
	}
	};
	}