From 90bee6003f3d7160fb936d01511a35eeb5bc708c Mon Sep 17 00:00:00 2001
From: lisps <stummp@loewen.de>
Date: Sat, 22 Feb 2014 03:13:10 +0100
Subject: [PATCH] fix check link existence, have to call getLastRevisionAt for
 every link

---
 inc/pageutils.php    | 33 ++++++++++++++++++++++++++-------
 inc/parser/xhtml.php |  2 +-
 2 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/inc/pageutils.php b/inc/pageutils.php
index 20fe54a8ee..4504fdd2ba 100644
--- a/inc/pageutils.php
+++ b/inc/pageutils.php
@@ -231,7 +231,13 @@ function sectionID($title,&$check) {
  *
  * @author Chris Smith <chris@jalakai.co.uk>
  */
-function page_exists($id,$rev='',$clean=true) {
+function page_exists($id,$rev='',$clean=true, $data_at=false) {
+    if($rev !== '' && $date_at) {
+        $pagelog = new PageChangeLog($page);
+        $pagelog_rev = $pagelog->getLastRevisionAt($rev);
+        if($pagelog_rev !== false)
+            $rev = $pagelog_rev;
+    }
     return @file_exists(wikiFN($id,$rev,$clean));
 }
 
@@ -432,7 +438,14 @@ function resolve_id($ns,$id,$clean=true){
  *
  * @author Andreas Gohr <andi@splitbrain.org>
  */
-function resolve_mediaid($ns,&$page,&$exists,$rev='' ){
+function resolve_mediaid($ns,&$page,&$exists,$rev='',$date_at=false){
+    if($rev !== '' &&  $date_at){
+        $medialog = new MediaChangeLog($media_id);
+        $medialog_rev = $medialog->getLastRevisionAt($rev);
+        if($medialog_rev !== false) {
+            $rev = $medialog_rev;
+        }
+    }
     $page   = resolve_id($ns,$page);
     $file   = mediaFN($page,$rev);
     $exists = @file_exists($file);
@@ -443,7 +456,7 @@ function resolve_mediaid($ns,&$page,&$exists,$rev='' ){
  *
  * @author Andreas Gohr <andi@splitbrain.org>
  */
-function resolve_pageid($ns,&$page,&$exists,$rev='' ){
+function resolve_pageid($ns,&$page,&$exists,$rev='',$date_at=false ){
     global $conf;
     global $ID;
     $exists = false;
@@ -463,20 +476,26 @@ function resolve_pageid($ns,&$page,&$exists,$rev='' ){
     $page = resolve_id($ns,$page,false); // resolve but don't clean, yet
 
     // get filename (calls clean itself)
+    if($rev !== '' && $date_at) {
+        $pagelog = new PageChangeLog($page);
+        $pagelog_rev = $pagelog->getLastRevisionAt($rev);
+        if($pagelog_rev !== false)//something found
+           $rev  = $pagelog_rev;
+    }
     $file = wikiFN($page,$rev);
 
     // if ends with colon or slash we have a namespace link
     if(in_array(substr($page,-1), array(':', ';')) ||
        ($conf['useslash'] && substr($page,-1) == '/')){
-        if(page_exists($page.$conf['start'],$rev)){
+        if(page_exists($page.$conf['start'],$rev,true,$date_at)){
             // start page inside namespace
             $page = $page.$conf['start'];
             $exists = true;
-        }elseif(page_exists($page.noNS(cleanID($page),$rev))){
+        }elseif(page_exists($page.noNS(cleanID($page)),$rev,true,$date_at)){
             // page named like the NS inside the NS
             $page = $page.noNS(cleanID($page));
             $exists = true;
-        }elseif(page_exists($page,$rev)){
+        }elseif(page_exists($page,$rev,true,$date_at)){
             // page like namespace exists
             $page = $page;
             $exists = true;
@@ -493,7 +512,7 @@ function resolve_pageid($ns,&$page,&$exists,$rev='' ){
                 }else{
                     $try = $page.'s';
                 }
-                if(page_exists($try,$rev)){
+                if(page_exists($try,$rev,true,$date_at)){
                     $page   = $try;
                     $exists = true;
                 }
diff --git a/inc/parser/xhtml.php b/inc/parser/xhtml.php
index 73de507b5a..2bfa894ac8 100644
--- a/inc/parser/xhtml.php
+++ b/inc/parser/xhtml.php
@@ -589,7 +589,7 @@ function internallink($id, $name = null, $search=null,$returnonly=false,$linktyp
         $default = $this->_simpleTitle($id);
 
         // now first resolve and clean up the $id
-        resolve_pageid(getNS($ID),$id,$exists,$this->date_at);
+        resolve_pageid(getNS($ID),$id,$exists,$this->date_at,true);
 
         $name = $this->_getLinkTitle($name, $default, $isImage, $id, $linktype);
         if ( !$isImage ) {