add getMimeByPath method

README.md

@@ -186,6 +186,18 @@ var_dump (
 );
 ```
 
+#### Filesystem::getMimeByPath
+
+Return file MIME if path match storage item
+
+```
+var_dump (
+    $filesystem->getMimeByPath(
+        '/full/path/to/page.txt'
+    )
+);
+```
+
 #### Filesystem::getDataByPath
 
 Return file content if path match storage item

src/Dokuwiki/Filesystem.php

@@ -187,6 +187,18 @@ class Filesystem
         return $path;
     }
 
+    public function getMimeByPath(?string $path): ?string
+    {
+        if (in_array($path, $this->_list) && is_file($path) || is_readable($path))
+        {
+            return mime_content_type(
+                $path
+            );
+        }
+
+        return null;
+    }
+
     public function getDataByPath(?string $path): ?string
     {
         if (in_array($path, $this->_list) && is_file($path) || is_readable($path))