From 602cef87e06d0d3222c6f37c01ee594ba933685e Mon Sep 17 00:00:00 2001
From: Brad Jorsch <bjorsch@wikimedia.org>
Date: Mon, 3 Apr 2017 12:52:12 -0400
Subject: [PATCH] mw.title: Add pageLanguage property

Bug: T161976
Change-Id: Ifc7a462efb11b28f20ebaad5d62cba8f1f1f8e91
---
 includes/engines/LuaCommon/TitleLibrary.php    | 1 +
 includes/engines/LuaCommon/lualib/mw.title.lua | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/includes/engines/LuaCommon/TitleLibrary.php b/includes/engines/LuaCommon/TitleLibrary.php
index b520a76b..cd94fd94 100644
--- a/includes/engines/LuaCommon/TitleLibrary.php
+++ b/includes/engines/LuaCommon/TitleLibrary.php
@@ -139,6 +139,7 @@ class Scribunto_LuaTitleLibrary extends Scribunto_LuaLibraryBase {
 			'isRedirect' => (bool)$title->isRedirect(),
 			'id' => $title->getArticleID(),
 			'contentModel' => $title->getContentModel(),
+			'pageLanguage' => $title->getPageLanguage()->getCode(),
 		];
 		if ( $title->getNamespace() === NS_SPECIAL ) {
 			$ret['exists'] = MediaWikiServices::getInstance()
diff --git a/includes/engines/LuaCommon/lualib/mw.title.lua b/includes/engines/LuaCommon/lualib/mw.title.lua
index b36022f5..2b35232d 100644
--- a/includes/engines/LuaCommon/lualib/mw.title.lua
+++ b/includes/engines/LuaCommon/lualib/mw.title.lua
@@ -175,6 +175,7 @@ local function makeTitleObject( data )
 		exists = 'e',
 		isRedirect = 'e',
 		contentModel = 'e',
+		pageLanguage = 'e',
 		id = 'e',
 		redirectTarget = true,
 	}
@@ -207,6 +208,9 @@ local function makeTitleObject( data )
 
 			if readOnlyFields[k] == 'e' and data[k] == nil then
 				for k,v in pairs( php.getExpensiveData( t.fullText ) ) do
+					if k == 'pageLanguage' and mw.language then
+						v = mw.language.new( v )
+					end
 					data[k] = v
 				end
 			end