Not let the user override files and count the file size just once (the last update) - refs BT#7644

main/inc/ajax/document.ajax.php

@@ -33,7 +33,7 @@ switch($action) {
                 $file['name'],
                 null,
                 0,
-                'overwrite',
+                null,
                 false,
                 false
             );

main/inc/lib/document.lib.php

@@ -2579,7 +2579,7 @@ class DocumentManager
             $session_condition = " AND props.id_session='" . $session_id . "' ";
         }
 
-        $sql = "SELECT SUM(size) FROM  " . $TABLE_ITEMPROPERTY . "  AS props, " . $TABLE_DOCUMENT . "  AS docs
+        $sql = "SELECT coalesce(docs.size, 0), docs.path FROM  " . $TABLE_ITEMPROPERTY . "  AS props, " . $TABLE_DOCUMENT . "  AS docs
 		        WHERE 	props.c_id 	= $course_id AND
 		        		docs.c_id 	= $course_id AND
 		        		docs.id 	= props.ref AND
@@ -2587,15 +2587,18 @@ class DocumentManager
                         props.visibility <> 2
                         $group_condition
                         $session_condition
+                        ORDER BY docs.id
                 ";
         $result = Database::query($sql);
-
-        if ($result && Database::num_rows($result) != 0) {
-            $row = Database::fetch_row($result);
-            return $row[0];
-        } else {
-            return 0;
-        }
+        
+        //Not count the same file more than once
+        //if there is more than once just take the last
+        $docsSize = array();
+        while ($row = Database::fetch_row($result)) {
+            $md5Key = md5($row[1]);
+            $docsSize[$md5Key] = $row[0];
+        }
+        return array_sum($docsSize);
     }
 
     /**