--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Parameter.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,373 @@
+<?php
+
+namespace Sabre\VObject;
+
+use
+    ArrayObject;
+
+/**
+ * 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) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Parameter extends Node {
+
+    /**
+     * Parameter name
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * vCard 2.1 allows parameters to be encoded without a name.
+     *
+     * We can deduce the parameter name based on it's value.
+     *
+     * @var bool
+     */
+    public $noName = false;
+
+    /**
+     * Parameter value
+     *
+     * @var string
+     */
+    protected $value;
+
+    /**
+     * Sets up the object.
+     *
+     * It's recommended to use the create:: factory method instead.
+     *
+     * @param string $name
+     * @param string $value
+     */
+    public function __construct(Document $root, $name, $value = null) {
+
+        $this->name = strtoupper($name);
+        $this->root = $root;
+        if (is_null($name)) {
+            $this->noName = true;
+            $this->name = static::guessParameterNameByValue($value);
+        }
+
+        // If guessParameterNameByValue() returns an empty string
+        // above, we're actually dealing with a parameter that has no value.
+        // In that case we have to move the value to the name.
+        if ($this->name === '') {
+            $this->noName = false;
+            $this->name = strtoupper($value);
+        } else {
+            $this->setValue($value);
+        }
+
+    }
+
+    /**
+     * Try to guess property name by value, can be used for vCard 2.1 nameless parameters.
+     *
+     * Figuring out what the name should have been. Note that a ton of
+     * these are rather silly in 2014 and would probably rarely be
+     * used, but we like to be complete.
+     *
+     * @param string $value
+     * @return string
+     */
+    public static function guessParameterNameByValue($value) {
+        switch(strtoupper($value)) {
+
+            // Encodings
+            case '7-BIT' :
+            case 'QUOTED-PRINTABLE' :
+            case 'BASE64' :
+                $name = 'ENCODING';
+                break;
+
+            // Common types
+            case 'WORK' :
+            case 'HOME' :
+            case 'PREF' :
+
+                // Delivery Label Type
+            case 'DOM' :
+            case 'INTL' :
+            case 'POSTAL' :
+            case 'PARCEL' :
+
+                // Telephone types
+            case 'VOICE' :
+            case 'FAX' :
+            case 'MSG' :
+            case 'CELL' :
+            case 'PAGER' :
+            case 'BBS' :
+            case 'MODEM' :
+            case 'CAR' :
+            case 'ISDN' :
+            case 'VIDEO' :
+
+                // EMAIL types (lol)
+            case 'AOL' :
+            case 'APPLELINK' :
+            case 'ATTMAIL' :
+            case 'CIS' :
+            case 'EWORLD' :
+            case 'INTERNET' :
+            case 'IBMMAIL' :
+            case 'MCIMAIL' :
+            case 'POWERSHARE' :
+            case 'PRODIGY' :
+            case 'TLX' :
+            case 'X400' :
+
+                // Photo / Logo format types
+            case 'GIF' :
+            case 'CGM' :
+            case 'WMF' :
+            case 'BMP' :
+            case 'DIB' :
+            case 'PICT' :
+            case 'TIFF' :
+            case 'PDF ':
+            case 'PS' :
+            case 'JPEG' :
+            case 'MPEG' :
+            case 'MPEG2' :
+            case 'AVI' :
+            case 'QTIME' :
+
+                // Sound Digital Audio Type
+            case 'WAVE' :
+            case 'PCM' :
+            case 'AIFF' :
+
+                // Key types
+            case 'X509' :
+            case 'PGP' :
+                $name = 'TYPE';
+                break;
+
+            // Value types
+            case 'INLINE' :
+            case 'URL' :
+            case 'CONTENT-ID' :
+            case 'CID' :
+                $name = 'VALUE';
+                break;
+
+            default:
+                $name = '';
+        }
+
+        return $name;
+    }
+
+    /**
+     * Updates the current value.
+     *
+     * This may be either a single, or multiple strings in an array.
+     *
+     * @param string|array $value
+     * @return void
+     */
+    public function setValue($value) {
+
+        $this->value = $value;
+
+    }
+
+    /**
+     * Returns the current value
+     *
+     * This method will always return a string, or null. If there were multiple
+     * values, it will automatically concatinate them (separated by comma).
+     *
+     * @return string|null
+     */
+    public function getValue() {
+
+        if (is_array($this->value)) {
+            return implode(',' , $this->value);
+        } else {
+            return $this->value;
+        }
+
+    }
+
+    /**
+     * Sets multiple values for this parameter.
+     *
+     * @param array $value
+     * @return void
+     */
+    public function setParts(array $value) {
+
+        $this->value = $value;
+
+    }
+
+    /**
+     * Returns all values for this parameter.
+     *
+     * If there were no values, an empty array will be returned.
+     *
+     * @return array
+     */
+    public function getParts() {
+
+        if (is_array($this->value)) {
+            return $this->value;
+        } elseif (is_null($this->value)) {
+            return array();
+        } else {
+            return array($this->value);
+        }
+
+    }
+
+    /**
+     * Adds a value to this parameter
+     *
+     * If the argument is specified as an array, all items will be added to the
+     * parameter value list.
+     *
+     * @param string|array $part
+     * @return void
+     */
+    public function addValue($part) {
+
+        if (is_null($this->value)) {
+            $this->value = $part;
+        } else {
+            $this->value = array_merge((array)$this->value, (array)$part);
+        }
+
+    }
+
+    /**
+     * Checks if this parameter contains the specified value.
+     *
+     * This is a case-insensitive match. It makes sense to call this for for
+     * instance the TYPE parameter, to see if it contains a keyword such as
+     * 'WORK' or 'FAX'.
+     *
+     * @param string $value
+     * @return bool
+     */
+    public function has($value) {
+
+        return in_array(
+            strtolower($value),
+            array_map('strtolower', (array)$this->value)
+        );
+
+    }
+
+    /**
+     * Turns the object back into a serialized blob.
+     *
+     * @return string
+     */
+    public function serialize() {
+
+        $value = $this->getParts();
+
+        if (count($value)===0) {
+            return $this->name . '=';
+        }
+
+        if ($this->root->getDocumentType() === Document::VCARD21 && $this->noName) {
+
+            return implode(';', $value);
+
+        }
+
+        return $this->name . '=' . array_reduce(
+            $value,
+            function($out, $item) {
+
+                if (!is_null($out)) $out.=',';
+
+                // If there's no special characters in the string, we'll use the simple
+                // format.
+                //
+                // The list of special characters is defined as:
+                //
+                // Any character except CONTROL, DQUOTE, ";", ":", ","
+                //
+                // by the iCalendar spec:
+                // https://tools.ietf.org/html/rfc5545#section-3.1
+                //
+                // And we add ^ to that because of:
+                // https://tools.ietf.org/html/rfc6868
+                //
+                // But we've found that iCal (7.0, shipped with OSX 10.9)
+                // severaly trips on + characters not being quoted, so we
+                // added + as well.
+                if (!preg_match('#(?: [\n":;\^,\+] )#x', $item)) {
+                    return $out.$item;
+                } else {
+                    // Enclosing in double-quotes, and using RFC6868 for encoding any
+                    // special characters
+                    $out.='"' . strtr(
+                        $item,
+                        array(
+                            '^'  => '^^',
+                            "\n" => '^n',
+                            '"'  => '^\'',
+                        )
+                    ) . '"';
+                    return $out;
+                }
+
+            }
+        );
+
+    }
+
+    /**
+     * This method returns an array, with the representation as it should be
+     * encoded in json. This is used to create jCard or jCal documents.
+     *
+     * @return array
+     */
+    public function jsonSerialize() {
+
+        return $this->value;
+
+    }
+
+    /**
+     * Called when this object is being cast to a string
+     *
+     * @return string
+     */
+    public function __toString() {
+
+        return (string)$this->getValue();
+
+    }
+
+    /**
+     * Returns the iterator for this object
+     *
+     * @return ElementList
+     */
+    public function getIterator() {
+
+        if (!is_null($this->iterator))
+            return $this->iterator;
+
+        return $this->iterator = new ArrayObject((array)$this->value);
+
+    }
+
+}