From 3f7615be58308071b2209879f98274e991eb5d90 Mon Sep 17 00:00:00 2001
From: Yuri Astrakhan <yurik@wikimedia.org>
Date: Sat, 14 Jan 2017 03:24:50 -0800
Subject: [PATCH] Add custom InterwikiLookup to MediaWikiTitleCodec

This patch allows for a custom InterwikiLookup service
when constructing MediaWikiTitleCodec instances.
If not specified, it continues to get the service from
MediaWikiServices::getInstance()->getInterwikiLookup().

This patch will allow a fully customized instance
creation, without any global state.

Change-Id: Ica87aff5df4534aae0a32e307b27d88b3df023b4
---
 includes/title/MediaWikiTitleCodec.php | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/includes/title/MediaWikiTitleCodec.php b/includes/title/MediaWikiTitleCodec.php
index 1bf05d978c..7a71714bca 100644
--- a/includes/title/MediaWikiTitleCodec.php
+++ b/includes/title/MediaWikiTitleCodec.php
@@ -21,6 +21,7 @@
  * @license GPL 2+
  * @author Daniel Kinzler
  */
+use MediaWiki\Interwiki\InterwikiLookup;
 use MediaWiki\MediaWikiServices;
 use MediaWiki\Linker\LinkTarget;
 
@@ -51,17 +52,25 @@ class MediaWikiTitleCodec implements TitleFormatter, TitleParser {
 	 */
 	protected $localInterwikis;
 
+	/**
+	 * @var InterwikiLookup
+	 */
+	protected $interwikiLookup;
+
 	/**
 	 * @param Language $language The language object to use for localizing namespace names.
 	 * @param GenderCache $genderCache The gender cache for generating gendered namespace names
 	 * @param string[]|string $localInterwikis
+	 * @param InterwikiLookup|null $interwikiLookup
 	 */
 	public function __construct( Language $language, GenderCache $genderCache,
-		$localInterwikis = []
+		$localInterwikis = [], $interwikiLookup = null
 	) {
 		$this->language = $language;
 		$this->genderCache = $genderCache;
 		$this->localInterwikis = (array)$localInterwikis;
+		$this->interwikiLookup = $interwikiLookup ?:
+			MediaWikiServices::getInstance()->getInterwikiLookup();
 	}
 
 	/**
@@ -310,7 +319,6 @@ class MediaWikiTitleCodec implements TitleFormatter, TitleParser {
 			if ( preg_match( $prefixRegexp, $dbkey, $m ) ) {
 				$p = $m[1];
 				$ns = $this->language->getNsIndex( $p );
-				$interwikiLookup = MediaWikiServices::getInstance()->getInterwikiLookup();
 				if ( $ns !== false ) {
 					# Ordinary namespace
 					$dbkey = $m[2];
@@ -320,13 +328,13 @@ class MediaWikiTitleCodec implements TitleFormatter, TitleParser {
 						if ( $this->language->getNsIndex( $x[1] ) ) {
 							# Disallow Talk:File:x type titles...
 							throw new MalformedTitleException( 'title-invalid-talk-namespace', $text );
-						} elseif ( $interwikiLookup->isValidInterwiki( $x[1] ) ) {
+						} elseif ( $this->interwikiLookup->isValidInterwiki( $x[1] ) ) {
 							// TODO: get rid of global state!
 							# Disallow Talk:Interwiki:x type titles...
 							throw new MalformedTitleException( 'title-invalid-talk-namespace', $text );
 						}
 					}
-				} elseif ( $interwikiLookup->isValidInterwiki( $p ) ) {
+				} elseif ( $this->interwikiLookup->isValidInterwiki( $p ) ) {
 					# Interwiki link
 					$dbkey = $m[2];
 					$parts['interwiki'] = $this->language->lc( $p );
-- 
2.20.1