Transmit User and Lang to the PageParseJob instead of ParserOptions

ParserOptions is not properly serializable, so instantiation of the PageParseJob may fail.
Solution: Recreate ParserOptions from User and Language

PageParseJob.php

@@ -25,10 +25,11 @@
 namespace PurgePage;
 
 use Job;
-use Parser;
+use Language;
 use ParserOptions;
 use PoolWorkArticleView;
 use Title;
+use WikiPage;
 
 /**
  * Class PageParseJob
@@ -38,7 +39,8 @@
  */
 class PageParseJob extends Job {
 
-	private $mParserOptions;
+	private $user;
+	private $language;
 
 	/**
 	 * Callers should use DuplicateJob::newFromJob() instead
@@ -47,9 +49,10 @@ class PageParseJob extends Job {
 	 * @param array $params Job parameters
 	 */
 	public function __construct( Title $title, array $params ) {
-		parent::__construct( 'pageParse', $title, $params );
+		parent::__construct( 'parsePage', $title, $params );
 
-		$this->mParserOptions = isset( $params[ 'parseroptions' ] ) ? $params[ 'parseroptions' ] : new ParserOptions();
+		$this->user = isset( $params[ 'user' ] ) ? $params[ 'user' ] : null;
+		$this->language = isset( $params[ 'lang' ] ) ? Language::factory( $params[ 'lang' ] ) : null;
 
 		// this does NOT protect against recursion, it only discards duplicate
 		// calls to {{#purge}} on the same page
@@ -64,10 +67,12 @@ public function run() {
 
 		$title = $this->getTitle();
 
-		if ( $title->isContentPage() && $title->exists() ) {
+		if ( $title !== null && $title->isContentPage() && $title->exists() ) {
 
-			$wikiPage = \WikiPage::factory( $title );
-			$pool = new PoolWorkArticleView( $wikiPage, $this->mParserOptions, $wikiPage->getLatest(), false );
+			$wikiPage = WikiPage::factory( $title );
+			$parserOptions = new ParserOptions( $this->user, $this->language );
+
+			$pool = new PoolWorkArticleView( $wikiPage, $parserOptions, $wikiPage->getLatest(), false );
 			$pool->execute();
 		}
 

PurgePage.php

@@ -2,7 +2,9 @@
 
 namespace PurgePage;
 
-use PoolWorkArticleView;
+use Job;
+use JobQueueGroup;
+use Title;
 
 class PurgePage {
 
@@ -22,10 +24,15 @@ public static function registerParserFunction( \Parser &$parser ) {
 				$parser = $params[ 0 ];
 				$pageName = $params[ 1 ];
 
-				$title = \Title::newFromText( $pageName );
-				$job = \Job::factory( 'parsePage', $title, [ 'parseroptions' => $parser->getOptions() ] );
+				$title = Title::newFromText( $pageName );
+
+				if ( $title !== null && $title->isContentPage() && $title->exists() ) {
+					/** @var \ParserOptions $parserOptions */
+					$parserOptions = $parser->getOptions();
+					$job           = Job::factory( 'parsePage', $title, [ 'user' => $parserOptions->getUser(), 'lang' => $parserOptions->getUserLang() ] );
+					JobQueueGroup::singleton()->lazyPush( $job );
+				}
 
-				\JobQueueGroup::singleton()->lazyPush( [ $job ] );
 
 			}