add parameter at($DATE_AT) and mind revisions

6 files changed, 81 insertions, 13 deletions

diff --git a/inc/changelog.php b/inc/changelog.php
index de26fdf6a..0a33f6a6e 100644
--- a/inc/changelog.php
+++ b/inc/changelog.php
@@ -814,3 +814,26 @@ function getRevisions($id, $first, $num, $chunk_size=8192, $media=false) {
     $log = new PageRevisionLog($id, $chunk_size);
     return $log->getRevisions($first, $num, $media);
 }
+
+/**
+* Return an existing revision for a specific date which is 
+* the current one or less or equal then the date
+*
+* @param string $id 
+* @param number $date_at
+* @param boolean $media
+* @return string revision ('' for current)
+*/
+function getProperRevision($id,$date_at,$media = false){
+    $create_time = @filemtime($media?mediaFN($id):wikiFN($id));
+    if(((int)$date_at) >= $create_time) { //requestet REV older then time($id) => load current
+        return '';
+    } else {
+        $log = new PageRevisionLog($id);
+        if($rev = $log->getRelativeRevision($date_at+1, -1,$media)) {
+            return $rev;
+        } else {
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/inc/common.php b/inc/common.php
index dd30b53ab..e5e4f78c8 100644
--- a/inc/common.php
+++ b/inc/common.php
@@ -161,7 +161,7 @@ function pageinfo() {
     if($REV) {
         //check if current revision was meant
         if($info['exists'] && (@filemtime($info['filepath']) == $REV)) {
-            $REV = '';
+            //$REV = ''; //if we enter a rev we want to see that revision (inc media files)
         } elseif($RANGE) {
             //section editing does not work with old revisions!
             $REV   = '';
diff --git a/inc/html.php b/inc/html.php
index b48a17fc5..5b79ab659 100644
--- a/inc/html.php
+++ b/inc/html.php
@@ -207,6 +207,7 @@ function html_show($txt=null){
     global $REV;
     global $HIGH;
     global $INFO;
+    global $DATE_AT;
     //disable section editing for old revisions or in preview
     if($txt || $REV){
         $secedit = false;
@@ -226,8 +227,8 @@ function html_show($txt=null){
         echo '</div></div>';
 
     }else{
-        if ($REV) print p_locale_xhtml('showrev');
-        $html = p_wiki_xhtml($ID,$REV,true);
+        if ($REV||$DATE_AT) print p_locale_xhtml('showrev');
+        $html = p_wiki_xhtml($ID,$REV,true,$DATE_AT);
         $html = html_secedit($html,$secedit);
         if($INFO['prependTOC']) $html = tpl_toc(true).$html;
         $html = html_hilight($html,$HIGH);
diff --git a/inc/parser/xhtml.php b/inc/parser/xhtml.php
index fd02c0ce0..a677db276 100644
--- a/inc/parser/xhtml.php
+++ b/inc/parser/xhtml.php
@@ -28,6 +28,8 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
     // @access public
     var $doc = '';        // will contain the whole document
     var $toc = array();   // will contain the Table of Contents
+    var $rev = '';
+    var $date_at = '';
 
     var $sectionedits = array(); // A stack of section edit data
     private $lastsecid = 0; // last section edit id, used by startSectionEdit
@@ -618,6 +620,11 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
         }
         $link['more']   = '';
         $link['class']  = $class;
+        if($this->date_at) {
+            $params['at'] = $this->date_at;
+        } else if($this->rev) {
+            //$params['at'] = $this->rev;
+        }
         $link['url']    = wl($id, $params);
         $link['name']   = $name;
         $link['title']  = $id;
@@ -792,7 +799,11 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
 
         list($ext,$mime,$dl) = mimetype($src,false);
         if(substr($mime,0,5) == 'image' && $render){
-            $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache),($linking=='direct'));
+            if(($this->rev||$this->date_at)) {
+                $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache,'rev'=>$this->_getProperMediaRevision($src)),($linking=='direct'));
+            } else {
+                $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache),($linking=='direct'));
+            }
         }elseif($mime == 'application/x-shockwave-flash' && $render){
             // don't link flash movies
             $noLink = true;
@@ -800,7 +811,11 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
             // add file icons
             $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
             $link['class'] .= ' mediafile mf_'.$class;
-            $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache),true);
+            if(($this->rev||$this->date_at)) {
+                $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache,'rev'=>$this->_getProperMediaRevision($src)),true);
+            } else {
+                $link['url'] = ml($src,array('id'=>$ID,'cache'=>$cache),true);
+            }
             if ($exists) $link['title'] .= ' (' . filesize_h(filesize(mediaFN($src))).')';
         }
 
@@ -1048,7 +1063,7 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
                       $height=null, $cache=null, $render = true) {
 
         $ret = '';
-
+        $intern = !is_externalmedia($src);
         list($ext,$mime,$dl) = mimetype($src);
         if(substr($mime,0,5) == 'image'){
             // first get the $title
@@ -1073,7 +1088,11 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
                 return $title;
             }
             //add image tag
-            $ret .= '<img src="'.ml($src,array('w'=>$width,'h'=>$height,'cache'=>$cache)).'"';
+            if($intern && ($this->rev||$this->date_at)) {
+                $ret .= '<img src="'.ml($src,array('w'=>$width,'h'=>$height,'cache'=>$cache,'rev'=>$this->_getProperMediaRevision($src))).'"';
+            } else { 
+                $ret .= '<img src="'.ml($src,array('w'=>$width,'h'=>$height,'cache'=>$cache)).'"';
+            }
             $ret .= ' class="media'.$align.'"';
 
             if ($title) {
@@ -1221,6 +1240,23 @@ class Doku_Renderer_xhtml extends Doku_Renderer {
 
         return $link;
     }
+    
+    /**
+     * _getProperMediaRevision is a helperfunction to internalmedia() and _media()
+     * which returns an existing media revision less or equal to rev or date_at
+     *
+     * @author lisps
+     * @param string $media_id
+     * @access protected
+     * @return string revision ('' for current) 
+     */
+    function _getProperMediaRevision($media_id){
+        $rev = $this->rev;
+        if($this->date_at){
+            $rev = $this->date_at;
+        }
+        return getProperRevision($media_id,$rev,true);
+    }
 
 
 }
diff --git a/inc/parserutils.php b/inc/parserutils.php
index b67daaabb..c50bf7332 100644
--- a/inc/parserutils.php
+++ b/inc/parserutils.php
@@ -56,7 +56,7 @@ define('METADATA_RENDER_UNLIMITED', 4);
  *
  * @author Andreas Gohr <andi@splitbrain.org>
  */
-function p_wiki_xhtml($id, $rev='', $excuse=true){
+function p_wiki_xhtml($id, $rev='', $excuse=true,$date_at=''){
     $file = wikiFN($id,$rev);
     $ret  = '';
 
@@ -65,9 +65,9 @@ function p_wiki_xhtml($id, $rev='', $excuse=true){
     $keep = $ID;
     $ID   = $id;
 
-    if($rev){
+    if($rev || $date_at){
         if(@file_exists($file)){
-            $ret = p_render('xhtml',p_get_instructions(io_readWikiPage($file,$id,$rev)),$info); //no caching on old revisions
+            $ret = p_render('xhtml',p_get_instructions(io_readWikiPage($file,$id,$rev)),$info,$rev,$date_at); //no caching on old revisions
         }elseif($excuse){
             $ret = p_locale_xhtml('norev');
         }
@@ -583,7 +583,7 @@ function p_sort_modes($a, $b){
  * @author Harry Fuecks <hfuecks@gmail.com>
  * @author Andreas Gohr <andi@splitbrain.org>
  */
-function p_render($mode,$instructions,&$info){
+function p_render($mode,$instructions,&$info,$rev='',$date_at=''){
     if(is_null($instructions)) return '';
 
     $Renderer =& p_get_renderer($mode);
@@ -591,6 +591,13 @@ function p_render($mode,$instructions,&$info){
 
     $Renderer->reset();
 
+    if($rev) {
+        $Renderer->rev = $rev;
+    }
+    if($date_at) {
+        $Renderer->date_at = $date_at;
+    }
+    
     $Renderer->smileys = getSmileys();
     $Renderer->entities = getEntities();
     $Renderer->acronyms = getAcronyms();
diff --git a/inc/template.php b/inc/template.php
index 60e178d1a..ac85059a8 100644
--- a/inc/template.php
+++ b/inc/template.php
@@ -1031,6 +1031,7 @@ function tpl_img_getTag($tags, $alt = '', $src = null) {
 function tpl_img($maxwidth = 0, $maxheight = 0, $link = true, $params = null) {
     global $IMG;
     global $INPUT;
+    global $REV;
     $w = tpl_img_getTag('File.Width');
     $h = tpl_img_getTag('File.Height');
 
@@ -1055,8 +1056,8 @@ function tpl_img($maxwidth = 0, $maxheight = 0, $link = true, $params = null) {
     }
 
     //prepare URLs
-    $url = ml($IMG, array('cache'=> $INPUT->str('cache')), true, '&');
-    $src = ml($IMG, array('cache'=> $INPUT->str('cache'), 'w'=> $w, 'h'=> $h), true, '&');
+    $url = ml($IMG, array('cache'=> $INPUT->str('cache'),'rev'=>$REV), true, '&');
+    $src = ml($IMG, array('cache'=> $INPUT->str('cache'),'rev'=>$REV, 'w'=> $w, 'h'=> $h), true, '&');
 
     //prepare attributes
     $alt = tpl_img_getTag('Simple.Title');