From fcf9bf65832dc955e48284756ffa50033c1c15f1 Mon Sep 17 00:00:00 2001
From: steinm <steinm@577cc39b-cfd1-4aa2-8bc3-eda205cea05a>
Date: Fri, 8 Feb 2013 14:56:26 +0000
Subject: [PATCH] - do not create a new version if the new file is identical to
 the current version

---
 webdav/letodms_webdav.php | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/webdav/letodms_webdav.php b/webdav/letodms_webdav.php
index 601db0b91..c961d3c04 100644
--- a/webdav/letodms_webdav.php
+++ b/webdav/letodms_webdav.php
@@ -517,13 +517,22 @@ class HTTP_WebDAV_Server_LetoDMS extends HTTP_WebDAV_Server
 				if($lastDotIndex === false) $fileType = ".";
 				else $fileType = substr($name, $lastDotIndex);
 		}
+		/* First check whether there is already a file with the same name */
 		if($document = $this->dms->getDocumentByName($name, $folder)) {
 			if ($document->getAccessMode($this->user) < M_READWRITE) {
 				unlink($tmpFile);
 				return "403 Forbidden";
-			} elseif(!$document->addContent('', $this->user, $tmpFile, $name, $fileType, $mimetype, array(), array(), 0)) {
-				unlink($tmpFile);
-				return "409 Conflict";
+			} else{
+				/* Check if the new version iѕ identical to the current version.
+				 * In that case just update the modification date
+				 */
+				$lc = $document->getLatestContent();
+				if($lc->getChecksum() == LetoDMS_Core_File::checksum($tmpFile)) {
+					$lc->setDate();
+				} elseif(!$document->addContent('', $this->user, $tmpFile, $name, $fileType, $mimetype, array(), array(), 0)) {
+					unlink($tmpFile);
+					return "409 Conflict";
+				}
 			}
 
 		} else {