media version saving

1 files changed, 27 insertions, 0 deletions

diff --git a/inc/media.php b/inc/media.php
index 3c9340d51..6be66dedc 100644
--- a/inc/media.php
+++ b/inc/media.php
@@ -346,6 +346,13 @@ function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'mov
     global $conf;
     global $lang;
 
+    $old = @filemtime($fn);
+    //
+    if(!@file_exists(mediaFN($id, $old)) && @file_exists($fn)) {
+        // add old revision to the attic if missing
+        saveOldMediaRevision($id);
+    }
+
     // prepare directory
     io_createNamespace($id, 'media');
 
@@ -369,6 +376,26 @@ function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'mov
 }
 
 /**
+ * moves the current version to the media_attic and returns its
+ * revision date
+ */
+function saveOldMediaRevision($id, $move = 'copy'){
+    global $conf;
+    $oldf = mediaFN($id);
+    if(!@file_exists($oldf)) return '';
+    $date = filemtime($oldf);
+    $newf = mediaFN($id,$date);
+    io_makeFileDir($newf);
+    if($move($oldf, $newf)) {
+        // Set the correct permission here.
+        // Always chmod media because they may be saved with different permissions than expected from the php umask.
+        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
+        chmod($newf, $conf['fmode']);
+    }
+    return $date;
+}
+
+/**
  * This function checks if the uploaded content is really what the
  * mimetype says it is. We also do spam checking for text types here.
  *