Use HookHandlers for MobileFrontend hook

Bug: T271021
Change-Id: I9293e1fee102b9a4274ef460b9c7556e0c7c6f6a

.phan/config.php

@@ -2,4 +2,18 @@
 
 $cfg = require __DIR__ . '/../vendor/mediawiki/mediawiki-phan-config/src/config.php';
 
+$cfg['directory_list'] = array_merge(
+	$cfg['directory_list'],
+	[
+		'../../extensions/MobileFrontend',
+	]
+);
+
+$cfg['exclude_analysis_directory_list'] = array_merge(
+	$cfg['exclude_analysis_directory_list'],
+	[
+		'../../extensions/MobileFrontend',
+	]
+);
+
 return $cfg;

extension.json

@@ -31,7 +31,7 @@
 		"ParserModifyImageHTML": "parser",
 		"ParserTestGlobals": "parser",
 		"SearchResultProvideThumbnail": "search",
-		"SpecialMobileEditWatchlist::images": "PageImages\\PageImages::onSpecialMobileEditWatchlistImages"
+		"SpecialMobileEditWatchlist::images": "mobile"
 	},
 	"HookHandlers": {
 		"main": {
@@ -45,6 +45,9 @@
 		"search": {
 			"class": "PageImages\\Hooks\\SearchResultProvideThumbnailHookHandler",
 			"services": [ "SearchResultThumbnailProvider", "PageProps", "RepoGroup" ]
+		},
+		"mobile": {
+			"class": "PageImages\\Hooks\\MobileFrontendHookHandlers"
 		}
 	},
 	"JobClasses": {

includes/Hooks/MobileFrontendHookHandlers.php

@@ -0,0 +1,49 @@
+<?php
+
+// phpcs:disable MediaWiki.NamingConventions.LowerCamelFunctionsName.FunctionName
+
+namespace PageImages\Hooks;
+
+use IContextSource;
+use MediaWiki\Title\Title;
+use MobileFrontend\Hooks\SpecialMobileEditWatchlistImagesHook;
+use PageImages\PageImages;
+
+/**
+ * Hooks from MobileFrontend extension,
+ * which is optional to use with this extension.
+ */
+class MobileFrontendHookHandlers implements SpecialMobileEditWatchlistImagesHook {
+
+	/**
+	 * SpecialMobileEditWatchlist::images hook handler, adds images to mobile watchlist A-Z view
+	 *
+	 * @param IContextSource $context Context object. Ignored
+	 * @param array[] &$watchlist Array of relevant pages on the watchlist, sorted by namespace
+	 * @param array[] &$images Array of images to populate
+	 */
+	public function onSpecialMobileEditWatchlist__images(
+		IContextSource $context, array &$watchlist, array &$images
+	) {
+		$ids = [];
+		foreach ( $watchlist as $ns => $pages ) {
+			foreach ( array_keys( $pages ) as $dbKey ) {
+				$title = Title::makeTitle( $ns, $dbKey );
+				// Getting page ID here is safe because SpecialEditWatchlist::getWatchlistInfo()
+				// uses LinkBatch
+				$id = $title->getArticleID();
+				if ( $id ) {
+					$ids[$id] = $dbKey;
+				}
+			}
+		}
+
+		$data = PageImages::getImages( array_keys( $ids ) );
+		foreach ( $data as $id => $page ) {
+			if ( isset( $page['pageimage'] ) ) {
+				$images[ $page['ns'] ][ $ids[$id] ] = $page['pageimage'];
+			}
+		}
+	}
+
+}

includes/PageImages.php

@@ -218,37 +218,6 @@ class PageImages implements
 		}
 	}
 
-	/**
-	 * SpecialMobileEditWatchlist::images hook handler, adds images to mobile watchlist A-Z view
-	 *
-	 * @param IContextSource $context Context object. Ignored
-	 * @param array[] $watchlist Array of relevant pages on the watchlist, sorted by namespace
-	 * @param array[] &$images Array of images to populate
-	 */
-	public static function onSpecialMobileEditWatchlistImages(
-		IContextSource $context, array $watchlist, array &$images
-	) {
-		$ids = [];
-		foreach ( $watchlist as $ns => $pages ) {
-			foreach ( array_keys( $pages ) as $dbKey ) {
-				$title = Title::makeTitle( $ns, $dbKey );
-				// Getting page ID here is safe because SpecialEditWatchlist::getWatchlistInfo()
-				// uses LinkBatch
-				$id = $title->getArticleID();
-				if ( $id ) {
-					$ids[$id] = $dbKey;
-				}
-			}
-		}
-
-		$data = self::getImages( array_keys( $ids ) );
-		foreach ( $data as $id => $page ) {
-			if ( isset( $page['pageimage'] ) ) {
-				$images[ $page['ns'] ][ $ids[$id] ] = $page['pageimage'];
-			}
-		}
-	}
-
 	/**
 	 * Returns image information for pages with given ids
 	 *
@@ -257,7 +226,7 @@ class PageImages implements
 	 *
 	 * @return array[]
 	 */
-	private static function getImages( array $pageIds, $size = 0 ) {
+	public static function getImages( array $pageIds, $size = 0 ) {
 		$ret = [];
 		foreach ( array_chunk( $pageIds, ApiBase::LIMIT_SML1 ) as $chunk ) {
 			$request = [