1 files changed, 29 insertions, 9 deletions

diff --git a/inc/pageutils.php b/inc/pageutils.php
index b9c6418e2..2fbcbfd1f 100644
--- a/inc/pageutils.php
+++ b/inc/pageutils.php
@@ -256,7 +256,13 @@ function sectionID($title,&$check) {
  * @param bool       $clean  flag indicating that $id should be cleaned (see wikiFN as well)
  * @return bool exists?
  */
-function page_exists($id,$rev='',$clean=true) {
+function page_exists($id,$rev='',$clean=true, $date_at=false) {
+    if($rev !== '' && $date_at) {
+        $pagelog = new PageChangeLog($id);
+        $pagelog_rev = $pagelog->getLastRevisionAt($rev);
+        if($pagelog_rev !== false)
+            $rev = $pagelog_rev;
+    }
     return @file_exists(wikiFN($id,$rev,$clean));
 }
 
@@ -487,9 +493,17 @@ function resolve_id($ns,$id,$clean=true){
  * @param string &$page   (reference) relative media id, updated to resolved id
  * @param bool   &$exists (reference) updated with existance of media
  */
-function resolve_mediaid($ns,&$page,&$exists){
+function resolve_mediaid($ns,&$page,&$exists,$rev='',$date_at=false){
     $page   = resolve_id($ns,$page);
-    $file   = mediaFN($page);
+    if($rev !== '' &&  $date_at){
+        $medialog = new MediaChangeLog($page);
+        $medialog_rev = $medialog->getLastRevisionAt($rev);
+        if($medialog_rev !== false) {
+            $rev = $medialog_rev;
+        }
+    }
+    
+    $file   = mediaFN($page,$rev);
     $exists = @file_exists($file);
 }
 
@@ -502,7 +516,7 @@ function resolve_mediaid($ns,&$page,&$exists){
  * @param string &$page   (reference) relative page id, updated to resolved id
  * @param bool   &$exists (reference) updated with existance of media
  */
-function resolve_pageid($ns,&$page,&$exists){
+function resolve_pageid($ns,&$page,&$exists,$rev='',$date_at=false ){
     global $conf;
     global $ID;
     $exists = false;
@@ -522,20 +536,26 @@ function resolve_pageid($ns,&$page,&$exists){
     $page = resolve_id($ns,$page,false); // resolve but don't clean, yet
 
     // get filename (calls clean itself)
-    $file = wikiFN($page);
+    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.$conf['start'])){
+        if(page_exists($page.$conf['start'],$rev,true,$date_at)){
             // start page inside namespace
             $page = $page.$conf['start'];
             $exists = true;
-        }elseif(page_exists($page.noNS(cleanID($page)))){
+        }elseif(page_exists($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)){
+        }elseif(page_exists($page,$rev,true,$date_at)){
             // page like namespace exists
             $page = $page;
             $exists = true;
@@ -552,7 +572,7 @@ function resolve_pageid($ns,&$page,&$exists){
                 }else{
                     $try = $page.'s';
                 }
-                if(page_exists($try)){
+                if(page_exists($try,$rev,true,$date_at)){
                     $page   = $try;
                     $exists = true;
                 }