Add file utility functions

includes/functions.php

@@ -250,6 +250,47 @@ function file_prepend_data($filename, $dataToSave)
     }
 }
 
+/**
+ * Fetches a meta value from a file
+ *
+ * @param string $filename
+ * @param string $pattern
+ * @return string
+ */
+function file_get_meta($filename, $pattern)
+{
+    if(file_exists($filename)) {
+        $context = stream_context_create();
+        $file_data = file_get_contents($filename, false, $context);
+        preg_match('/^'.$pattern.'/', $file_data, $matched);
+        return $matched[1];
+    } else {
+        return false;
+    }
+}
+
+/**
+ * Renames an openvpn client config with the 'filename' header comment
+ *
+ * @param string file
+ * @return boolean
+ */
+function file_move_config($file)
+{
+    if(file_exists($file)) {
+        $file_data = file_get_contents($file);
+        preg_match('/^#\sfilename\s(.*)/i', $file_data, $matched);
+        $renamed = pathinfo($file, PATHINFO_DIRNAME).'/'.
+            $matched[1] .'_'.pathinfo($file, PATHINFO_FILENAME).'.'.
+            pathinfo($file, PATHINFO_EXTENSION);
+        if (!file_exists($renamed)) {
+            $return = system("sudo mv $file $renamed", $return);
+        } else {
+            return false;
+        }
+    }
+}
+
 /**
  * Callback function for array_filter
  *