From a70ec0e7c8617a470dd96ab6e46792f0638e3278 Mon Sep 17 00:00:00 2001
From: Yuri Astrakhan <yurik@users.mediawiki.org>
Date: Mon, 21 May 2007 00:10:01 +0000
Subject: [PATCH] API: breaking change: backlinks, embeddedin & imageusage now
 return lists in json instead of a map, and do not return anything when titles
 do not exist. (bug 9970)

---
 RELEASE-NOTES                      |  2 ++
 includes/api/ApiQueryBacklinks.php | 19 ++++++++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 5be3e01176..e3b11d7788 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -102,6 +102,8 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
           rc_this_oldid (textid) is no longer accessible from query watchlist
 * action=usercontribs: additional filtering by ucshow=; selection of needed fields with ucprop=;
   the textid (rev_text_id) is no longer being exposed
+* breaking change: backlinks, embeddedin & imageusage now return lists in json instead of a map,
+                   and do not return anything when titles do not exist. (bug 9970)
 
 == Maintenance script changes since 1.10 ==
 
diff --git a/includes/api/ApiQueryBacklinks.php b/includes/api/ApiQueryBacklinks.php
index 7edfa60520..4aec802e8f 100644
--- a/includes/api/ApiQueryBacklinks.php
+++ b/includes/api/ApiQueryBacklinks.php
@@ -167,22 +167,35 @@ class ApiQueryBacklinks extends ApiQueryGeneratorBase {
 			}
 
 			if (is_null($resultPageSet)) {
-				$vals = $this->addRowInfo('page', $row);
+				$vals = $this->extractRowInfo($row);
 				if ($vals)
-					$data[intval($row->page_id)] = $vals;
+					$data[] = $vals;
 			} else {
 				$resultPageSet->processDbRow($row);
 			}
 		}
 		$db->freeResult($res);
 
-		if (is_null($resultPageSet)) {
+		if (is_null($resultPageSet) && !empty($data)) {
 			$result = $this->getResult();
 			$result->setIndexedTagName($data, $this->bl_code);
 			$result->addValue('query', $this->getModuleName(), $data);
 		}
 	}
 
+	private function extractRowInfo($row) {
+
+		$title = Title :: makeTitle($row->page_namespace, $row->page_title);
+		if (!$title->userCanRead())
+			return false;
+
+		$vals = array();
+		$vals['pageid'] = intval($row->page_id);
+		ApiQueryBase :: addTitleInfo($vals, $title);
+
+		return $vals;
+	}
+
 	protected function processContinue($continue, $redirect) {
 		$pageSet = $this->getPageSet();
 		$count = $pageSet->getTitleCount();
-- 
2.20.1