--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/libcalendaring/lib/Sabre/VObject/Component/VCard.php	Sat Jan 13 08:57:56 2018 -0500
@@ -0,0 +1,107 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use Sabre\VObject;
+
+/**
+ * The VCard component
+ *
+ * This component represents the BEGIN:VCARD and END:VCARD found in every
+ * vcard.
+ *
+ * @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 VCard extends VObject\Component {
+
+    static $defaultName = 'VCARD';
+
+    /**
+     * VCards with version 2.1, 3.0 and 4.0 are found.
+     *
+     * If the VCARD doesn't know its version, 4.0 is assumed.
+     */
+    const DEFAULT_VERSION = '4.0';
+
+    /**
+     * Validates the node for correctness.
+     *
+     * The following options are supported:
+     *   - Node::REPAIR - If something is broken, and automatic repair may
+     *                    be attempted.
+     *
+     * An array is returned with warnings.
+     *
+     * Every item in the array has the following properties:
+     *    * level - (number between 1 and 3 with severity information)
+     *    * message - (human readable message)
+     *    * node - (reference to the offending node)
+     *
+     * @param int $options
+     * @return array
+     */
+    public function validate($options = 0) {
+
+        $warnings = array();
+
+        $version = $this->select('VERSION');
+        if (count($version)!==1) {
+            $warnings[] = array(
+                'level' => 1,
+                'message' => 'The VERSION property must appear in the VCARD component exactly 1 time',
+                'node' => $this,
+            );
+            if ($options & self::REPAIR) {
+                $this->VERSION = self::DEFAULT_VERSION;
+            }
+        } else {
+            $version = (string)$this->VERSION;
+            if ($version!=='2.1' && $version!=='3.0' && $version!=='4.0') {
+                $warnings[] = array(
+                    'level' => 1,
+                    'message' => 'Only vcard version 4.0 (RFC6350), version 3.0 (RFC2426) or version 2.1 (icm-vcard-2.1) are supported.',
+                    'node' => $this,
+                );
+                if ($options & self::REPAIR) {
+                    $this->VERSION = '4.0';
+                }
+            }
+
+        }
+        $fn = $this->select('FN');
+        if (count($fn)!==1) {
+            $warnings[] = array(
+                'level' => 1,
+                'message' => 'The FN property must appear in the VCARD component exactly 1 time',
+                'node' => $this,
+            );
+            if (($options & self::REPAIR) && count($fn) === 0) {
+                // We're going to try to see if we can use the contents of the
+                // N property.
+                if (isset($this->N)) {
+                    $value = explode(';', (string)$this->N);
+                    if (isset($value[1]) && $value[1]) {
+                        $this->FN = $value[1] . ' ' . $value[0];
+                    } else {
+                        $this->FN = $value[0];
+                    }
+
+                // Otherwise, the ORG property may work
+                } elseif (isset($this->ORG)) {
+                    $this->FN = (string)$this->ORG;
+                }
+
+            }
+        }
+
+        return array_merge(
+            parent::validate($options),
+            $warnings
+        );
+
+    }
+
+}
+