improve snapshot description file parse

lib/DirScanner.php

@@ -84,15 +84,16 @@ Class DirScanner {
         if (in_array($field, ['title', 'snapshot'])) {
             $content = preg_replace('/\s/', '', $content);
             if ($field == 'snapshot') {
-                $img_realpath = str_replace("{$pathinfo['filename']}.{$pathinfo['extension']}", $content, $realpath);
-                echo "img_realpath: ".$img_realpath."\n";
-                $id = $this->getId($img_realpath);
-                $fp = fopen($img_realpath, 'r');
-                $fstat = fstat($fp);
-                fclose($fp);
-                $img_pathinfo = pathinfo($img_realpath);
-                $extension = strtolower($img_pathinfo['extension']);
-                $content = $this->getFilePath( $id, $this->getDirectoryName($img_pathinfo['dirname'], $dirLevel), $img_pathinfo['filename'], $extension, $fstat['mtime'] );
+                $img_realpath = "{$pathinfo['dirname']}/{$content}";
+                if (file_exists($img_realpath)) {
+                    $id = $this->getId($img_realpath);
+                    $fp = fopen($img_realpath, 'r');
+                    $fstat = fstat($fp);
+                    fclose($fp);
+                    $img_pathinfo = pathinfo($img_realpath);
+                    $extension = strtolower($img_pathinfo['extension']);
+                    $content = $this->getFilePath( $id, $this->getDirectoryName($img_pathinfo['dirname'], $dirLevel), $img_pathinfo['filename'], $extension, $fstat['mtime'] );
+                }
             }
         }
         $data[$field] = $content;