1 files changed, 35 insertions, 13 deletions

diff --git a/inc/pageutils.php b/inc/pageutils.php
index 5f62926e4..2fbcbfd1f 100644
--- a/inc/pageutils.php
+++ b/inc/pageutils.php
@@ -20,7 +20,7 @@
  *
  * @param string $param  the $_REQUEST variable name, default 'id'
  * @param bool   $clean  if true, ID is cleaned
- * @return mixed|string
+ * @return string
  */
 function getID($param='id',$clean=true){
     /** @var Input $INPUT */
@@ -97,6 +97,7 @@ function getID($param='id',$clean=true){
  * converted to unaccented ones
  *
  * @author Andreas Gohr <andi@splitbrain.org>
+ *
  * @param  string  $raw_id    The pageid to clean
  * @param  boolean $ascii     Force ASCII
  * @return string cleaned id
@@ -152,7 +153,7 @@ function cleanID($raw_id,$ascii=false){
  * @author Andreas Gohr <andi@splitbrain.org>
  *
  * @param string $id
- * @return string|bool the namespace part or false if the given ID has no namespace (root)
+ * @return string|false the namespace part or false if the given ID has no namespace (root)
  */
 function getNS($id){
     $pos = strrpos((string)$id,':');
@@ -255,7 +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));
 }
 
@@ -265,7 +272,7 @@ function page_exists($id,$rev='',$clean=true) {
  * The filename is URL encoded to protect Unicode chars
  *
  * @param  $raw_id  string   id of wikipage
- * @param  $rev     string   page revision, empty string for current
+ * @param  $rev     int|string   page revision, empty string for current
  * @param  $clean   bool     flag indicating that $raw_id should be cleaned.  Only set to false
  *                           when $id is guaranteed to have been cleaned already.
  * @return string full path
@@ -435,7 +442,7 @@ function localeFN($id,$ext='txt'){
  * @param string $ns     namespace which is context of id
  * @param string $id     relative id
  * @param bool   $clean  flag indicating that id should be cleaned
- * @return mixed|string
+ * @return string
  */
 function resolve_id($ns,$id,$clean=true){
     global $conf;
@@ -486,9 +493,17 @@ function resolve_id($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);
 }
 
@@ -501,7 +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;
     $exists = false;
@@ -521,20 +536,26 @@ function resolve_pageid($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;
             $exists = true;
@@ -551,7 +572,7 @@ function resolve_pageid($ns,&$page,&$exists){
                 }else{
                     $try = $page.'s';
                 }
-                if(page_exists($try)){
+                if(page_exists($try,$rev,true,$date_at)){
                     $page   = $try;
                     $exists = true;
                 }
@@ -718,6 +739,7 @@ function utf8_decodeFN($file){
  * Used for sidebars, but can be used other stuff as well
  *
  * @todo   add event hook
+ *
  * @param  string $page the pagename you're looking for
  * @return string|false the full page id of the found page, false if any
  */