--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/libcalendaring/lib/Sabre/VObject/Parameter.php	Sat Jan 13 08:57:56 2018 -0500
@@ -0,0 +1,102 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * VObject Parameter
+ *
+ * This class represents a parameter. A parameter is always tied to a property.
+ * In the case of:
+ *   DTSTART;VALUE=DATE:20101108
+ * VALUE=DATE would be the parameter name and value.
+ *
+ * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Parameter extends Node {
+
+    /**
+     * Parameter name
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * Parameter value
+     *
+     * @var string
+     */
+    public $value;
+
+    /**
+     * Sets up the object
+     *
+     * @param string $name
+     * @param string $value
+     */
+    public function __construct($name, $value = null) {
+
+        if (!is_scalar($value) && !is_null($value)) {
+            throw new \InvalidArgumentException('The value argument must be a scalar value or null');
+        }
+
+        $this->name = strtoupper($name);
+        $this->value = $value;
+
+    }
+
+    /**
+     * Returns the parameter's internal value.
+     *
+     * @return string
+     */
+    public function getValue() {
+
+        return $this->value;
+
+    }
+
+
+    /**
+     * Turns the object back into a serialized blob.
+     *
+     * @return string
+     */
+    public function serialize() {
+
+        if (is_null($this->value)) {
+            return $this->name;
+        }
+        $src = array(
+            '\\',
+            "\n",
+        );
+        $out = array(
+            '\\\\',
+            '\n',
+        );
+
+        // quote parameters according to RFC 5545, Section 3.2
+        $quotes = '';
+        if (preg_match('/[:;,]/', $this->value)) {
+            $quotes = '"';
+        }
+
+        return $this->name . '=' . $quotes . str_replace($src, $out, $this->value) . $quotes;
+
+    }
+
+    /**
+     * Called when this object is being cast to a string
+     *
+     * @return string
+     */
+    public function __toString() {
+
+        return $this->value;
+
+    }
+
+}