PageImages support for mode=gallery on non file pages

includes/Lister/GalleryList.php

@@ -2,6 +2,7 @@
 
 namespace MediaWiki\Extension\DynamicPageList3\Lister;
 
+use ExtensionRegistry;
 use MediaWiki\Extension\DynamicPageList3\Article;
 
 class GalleryList extends Lister {
@@ -50,12 +51,26 @@
 	public function formatItem( Article $article, $pageText = null ) {
 		$item = $article->mTitle;
 
-		if ( $pageText !== null ) {
-			// Include parsed/processed wiki markup content after each item before the closing tag.
-			$item .= $pageText;
-		}
+		// If PageImages is loaded and we are not in the file namespace, attempt to assemble a gallery of PageImages
+		if ( $article->mNamespace !== NS_FILE && ExtensionRegistry::getInstance()->isLoaded( 'PageImages' ) ) {
+
+			$pageImage = $this->getPageImage( $article->mID ) ?: false;
+
+			if ( $pageImage ) {
+				// Successfully got a page image, wrapping it
+				$item = $this->getItemStart() . $pageImage . '| [[' . $item . ']]' . $this->itemEnd . 'link=' . $item;
+			} else {
+				// Failed to get a page image
+				$item = $this->getItemStart() . $item . $this->itemEnd . '[[' . $item . ']]';
+			}
+		} else {
+			if ( $pageText !== null ) {
+				// Include parsed/processed wiki markup content after each item before the closing tag.
+				$item .= $pageText;
+			}
 
-		$item = $this->getItemStart() . $item . $this->itemEnd;
+			$item = $this->getItemStart() . $item . $this->itemEnd;
+		}
 
 		$item = $this->replaceTagParameters( $item, $article );
 

includes/Lister/Lister.php

@@ -2,6 +2,7 @@
 
 namespace MediaWiki\Extension\DynamicPageList3\Lister;
 
+use ExtensionRegistry;
 use MediaWiki\Extension\DynamicPageList3\Article;
 use MediaWiki\Extension\DynamicPageList3\LST;
 use MediaWiki\Extension\DynamicPageList3\Parameters;
@@ -970,6 +971,7 @@
 	 */
 	protected function parseImageUrlWithPath( $article ) {
 		$repoGroup = MediaWikiServices::getInstance()->getRepoGroup();
+		$pageImagesEnabled = ExtensionRegistry::getInstance()->isLoaded( 'PageImages' );
 
 		$imageUrl = '';
 		if ( $article instanceof Article ) {
@@ -984,6 +986,17 @@
 					$fileTitle = Title::makeTitleSafe( NS_FILE, $article->mTitle->getDBKey() );
 					$imageUrl = $repoGroup->getLocalRepo()->newFile( $fileTitle )->getPath();
 				}
+			} elseif ( $pageImagesEnabled ) {
+				$pageImage = self::getPageImage( $article->mID ) ?: false;
+				if ( !$pageImage ) { 
+					return '';
+				}
+				$img = $repoGroup->findFile( Title::makeTitle( NS_FILE, $pageImage ) );
+				if ( $img && $img->exists() ) {
+					$imageUrl = $img->getURL();
+				} else {
+					$imageUrl = '';
+				}
 			}
 		} else {
 			$title = Title::newfromText( 'File:' . $article );
@@ -1301,4 +1314,23 @@
 	public function getRowCount() {
 		return $this->rowCount;
 	}
+
+	public function getPageImage( int $pageID ) {
+		$dbr = MediaWikiServices::getInstance()->getDBLoadBalancer()->getConnection( DB_REPLICA );
+		// In the future, a check could be made for page_image too, but page_image_free is the default, should do for now
+		$propValue = $dbr->selectField(
+			// Table to use
+			'page_props',
+			// Field to select
+			'pp_value',
+			// Where conditions
+			[
+				'pp_page' => $pageID,
+				'pp_propname' => 'page_image_free',
+			],
+			__METHOD__
+		);
+
+		return $propValue;
+	}
 }