diff --git a/rainloop/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php b/rainloop/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php
new file mode 100644
index 000000000..bfc33cfde
--- /dev/null
+++ b/rainloop/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace RainLoop\Plugins;
+
+class Helper
+{
+	/**
+	 * @return void
+	 */
+	private function __construct()
+	{
+	}
+
+	/**
+	 * @param string $sString
+	 * @param string $sWildcardValues
+	 *
+	 * @return bool
+	 */
+	static public function ValidateWildcardValues($sString, $sWildcardValues)
+	{
+		$sString = \trim($sString);
+		if ('' === $sString)
+		{
+			return false;
+		}
+
+		$sWildcardValues = \trim($sWildcardValues);
+		if ('' === $sWildcardValues || '*' === $sWildcardValues)
+		{
+			return true;
+		}
+
+		$sWildcardValues = \preg_replace('/[*]+/', '*', \preg_replace('/[\s,;]+/', ' ', $sWildcardValues));
+		$aWildcardValues = \explode(' ', $sWildcardValues);
+
+		foreach ($aWildcardValues as $sItem)
+		{
+			if (false === \strpos($sItem, '*'))
+			{
+				if ($sString === $sItem)
+				{
+					return true;
+				}
+			}
+			else
+			{
+				$aItem = \explode('*', $sItem);
+				$aItem = \array_map(function ($sItem) {
+					return \preg_quote($sItem, '/');
+				}, $aItem);
+
+				if (\preg_match('/'.\implode('.*', $aItem).'/', $sString))
+				{
+					return true;
+				}
+			}
+		}
+
+		return false;
+	}
+}