--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/VCardConverter.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,459 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * This utility converts vcards from one version to another.
+ *
+ * @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 VCardConverter {
+
+    /**
+     * Converts a vCard object to a new version.
+     *
+     * targetVersion must be one of:
+     *   Document::VCARD21
+     *   Document::VCARD30
+     *   Document::VCARD40
+     *
+     * Currently only 3.0 and 4.0 as input and output versions.
+     *
+     * 2.1 has some minor support for the input version, it's incomplete at the
+     * moment though.
+     *
+     * If input and output version are identical, a clone is returned.
+     *
+     * @param Component\VCard $input
+     * @param int $targetVersion
+     */
+    public function convert(Component\VCard $input, $targetVersion) {
+
+        $inputVersion = $input->getDocumentType();
+        if ($inputVersion===$targetVersion) {
+            return clone $input;
+        }
+
+        if (!in_array($inputVersion, array(Document::VCARD21, Document::VCARD30, Document::VCARD40))) {
+            throw new \InvalidArgumentException('Only vCard 2.1, 3.0 and 4.0 are supported for the input data');
+        }
+        if (!in_array($targetVersion, array(Document::VCARD30, Document::VCARD40))) {
+            throw new \InvalidArgumentException('You can only use vCard 3.0 or 4.0 for the target version');
+        }
+
+        $newVersion = $targetVersion===Document::VCARD40?'4.0':'3.0';
+
+        $output = new Component\VCard(array(
+            'VERSION' => $newVersion,
+        ));
+
+        foreach($input->children as $property) {
+
+            $this->convertProperty($input, $output, $property, $targetVersion);
+
+        }
+
+        return $output;
+
+    }
+
+    /**
+     * Handles conversion of a single property.
+     *
+     * @param Component\VCard $input
+     * @param Component\VCard $output
+     * @param Property $property
+     * @param int $targetVersion
+     * @return void
+     */
+    protected function convertProperty(Component\VCard $input, Component\VCard $output, Property $property, $targetVersion) {
+
+        // Skipping these, those are automatically added.
+        if (in_array($property->name, array('VERSION', 'PRODID'))) {
+            return;
+        }
+
+        $parameters = $property->parameters();
+        $valueType = null;
+        if (isset($parameters['VALUE'])) {
+            $valueType = $parameters['VALUE']->getValue();
+            unset($parameters['VALUE']);
+        }
+        if (!$valueType) {
+            $valueType = $property->getValueType();
+        }
+        $newProperty = $output->createProperty(
+            $property->name,
+            $property->getParts(),
+            array(), // parameters will get added a bit later.
+            $valueType
+        );
+
+
+        if ($targetVersion===Document::VCARD30) {
+
+            if ($property instanceof Property\Uri && in_array($property->name, array('PHOTO','LOGO','SOUND'))) {
+
+                $newProperty = $this->convertUriToBinary($output, $newProperty);
+
+            } elseif ($property instanceof Property\VCard\DateAndOrTime) {
+
+                // In vCard 4, the birth year may be optional. This is not the
+                // case for vCard 3. Apple has a workaround for this that
+                // allows applications that support Apple's extension still
+                // omit birthyears in vCard 3, but applications that do not
+                // support this, will just use a random birthyear. We're
+                // choosing 1604 for the birthyear, because that's what apple
+                // uses.
+                $parts = DateTimeParser::parseVCardDateTime($property->getValue());
+                if (is_null($parts['year'])) {
+                    $newValue = '1604-' . $parts['month'] . '-' . $parts['date'];
+                    $newProperty->setValue($newValue);
+                    $newProperty['X-APPLE-OMIT-YEAR'] = '1604';
+                }
+
+                if ($newProperty->name == 'ANNIVERSARY') {
+                    // Microsoft non-standard anniversary
+                    $newProperty->name = 'X-ANNIVERSARY';
+
+                    // We also need to add a new apple property for the same
+                    // purpose. This apple property needs a 'label' in the same
+                    // group, so we first need to find a groupname that doesn't
+                    // exist yet.
+                    $x = 1;
+                    while($output->select('ITEM' . $x . '.')) {
+                        $x++;
+                    }
+                    $output->add('ITEM' . $x . '.X-ABDATE', $newProperty->getValue(), array('VALUE' => 'DATE-AND-OR-TIME'));
+                    $output->add('ITEM' . $x . '.X-ABLABEL', '_$!<Anniversary>!$_');
+                }
+
+            } elseif ($property->name === 'KIND') {
+
+                switch(strtolower($property->getValue())) {
+                    case 'org' :
+                        // vCard 3.0 does not have an equivalent to KIND:ORG,
+                        // but apple has an extension that means the same
+                        // thing.
+                        $newProperty = $output->createProperty('X-ABSHOWAS','COMPANY');
+                        break;
+
+                    case 'individual' :
+                        // Individual is implicit, so we skip it.
+                        return;
+
+                    case 'group' :
+                        // OS X addressbook property
+                        $newProperty = $output->createProperty('X-ADDRESSBOOKSERVER-KIND','GROUP');
+                        break;
+                }
+
+
+            }
+
+        } elseif ($targetVersion===Document::VCARD40) {
+
+            // These properties were removed in vCard 4.0
+            if (in_array($property->name, array('NAME', 'MAILER', 'LABEL', 'CLASS'))) {
+                return;
+            }
+
+            if ($property instanceof Property\Binary) {
+
+                $newProperty = $this->convertBinaryToUri($output, $newProperty, $parameters);
+
+            } elseif ($property instanceof Property\VCard\DateAndOrTime && isset($parameters['X-APPLE-OMIT-YEAR'])) {
+
+                // If a property such as BDAY contained 'X-APPLE-OMIT-YEAR',
+                // then we're stripping the year from the vcard 4 value.
+                $parts = DateTimeParser::parseVCardDateTime($property->getValue());
+                if ($parts['year']===$property['X-APPLE-OMIT-YEAR']->getValue()) {
+                    $newValue = '--' . $parts['month'] . '-' . $parts['date'];
+                    $newProperty->setValue($newValue);
+                }
+
+                // Regardless if the year matched or not, we do need to strip
+                // X-APPLE-OMIT-YEAR.
+                unset($parameters['X-APPLE-OMIT-YEAR']);
+
+            }
+            switch($property->name) {
+                case 'X-ABSHOWAS' :
+                    if (strtoupper($property->getValue()) === 'COMPANY') {
+                        $newProperty = $output->createProperty('KIND','ORG');
+                    }
+                    break;
+                case 'X-ADDRESSBOOKSERVER-KIND' :
+                    if (strtoupper($property->getValue()) === 'GROUP') {
+                        $newProperty = $output->createProperty('KIND','GROUP');
+                    }
+                    break;
+                case 'X-ANNIVERSARY' :
+                    $newProperty->name = 'ANNIVERSARY';
+                    // If we already have an anniversary property with the same
+                    // value, ignore.
+                    foreach ($output->select('ANNIVERSARY') as $anniversary) {
+                        if ($anniversary->getValue() === $newProperty->getValue()) {
+                            return;
+                        }
+                    }
+                    break;
+                case 'X-ABDATE' :
+                    // Find out what the label was, if it exists.
+                    if (!$property->group) {
+                        break;
+                    }
+                    $label = $input->{$property->group . '.X-ABLABEL'};
+
+                    // We only support converting anniversaries.
+                    if (!$label || $label->getValue()!=='_$!<Anniversary>!$_') {
+                        break;
+                    }
+
+                    // If we already have an anniversary property with the same
+                    // value, ignore.
+                    foreach ($output->select('ANNIVERSARY') as $anniversary) {
+                        if ($anniversary->getValue() === $newProperty->getValue()) {
+                            return;
+                        }
+                    }
+                    $newProperty->name = 'ANNIVERSARY';
+                    break;
+                // Apple's per-property label system.
+                case 'X-ABLABEL' :
+                    if($newProperty->getValue() === '_$!<Anniversary>!$_') {
+                        // We can safely remove these, as they are converted to
+                        // ANNIVERSARY properties.
+                        return;
+                    }
+                    break;
+
+            }
+
+        }
+
+        // set property group
+        $newProperty->group = $property->group;
+
+        if ($targetVersion===Document::VCARD40) {
+            $this->convertParameters40($newProperty, $parameters);
+        } else {
+            $this->convertParameters30($newProperty, $parameters);
+        }
+
+        // Lastly, we need to see if there's a need for a VALUE parameter.
+        //
+        // We can do that by instantating a empty property with that name, and
+        // seeing if the default valueType is identical to the current one.
+        $tempProperty = $output->createProperty($newProperty->name);
+        if ($tempProperty->getValueType() !== $newProperty->getValueType()) {
+            $newProperty['VALUE'] = $newProperty->getValueType();
+        }
+
+        $output->add($newProperty);
+
+
+    }
+
+    /**
+     * Converts a BINARY property to a URI property.
+     *
+     * vCard 4.0 no longer supports BINARY properties.
+     *
+     * @param Component\VCard $output
+     * @param Property\Uri $property The input property.
+     * @param $parameters List of parameters that will eventually be added to
+     *                    the new property.
+     * @return Property\Uri
+     */
+    protected function convertBinaryToUri(Component\VCard $output, Property\Binary $newProperty, array &$parameters) {
+
+        $value = $newProperty->getValue();
+        $newProperty = $output->createProperty(
+            $newProperty->name,
+            null, // no value
+            array(), // no parameters yet
+            'URI' // Forcing the BINARY type
+        );
+
+        $mimeType = 'application/octet-stream';
+
+        // See if we can find a better mimetype.
+        if (isset($parameters['TYPE'])) {
+
+            $newTypes = array();
+            foreach($parameters['TYPE']->getParts() as $typePart) {
+                if (in_array(
+                    strtoupper($typePart),
+                    array('JPEG','PNG','GIF')
+                )) {
+                    $mimeType = 'image/' . strtolower($typePart);
+                } else {
+                    $newTypes[] = $typePart;
+                }
+            }
+
+            // If there were any parameters we're not converting to a
+            // mime-type, we need to keep them.
+            if ($newTypes) {
+                $parameters['TYPE']->setParts($newTypes);
+            } else {
+                unset($parameters['TYPE']);
+            }
+
+        }
+
+        $newProperty->setValue('data:' . $mimeType . ';base64,' . base64_encode($value));
+        return $newProperty;
+
+    }
+
+    /**
+     * Converts a URI property to a BINARY property.
+     *
+     * In vCard 4.0 attachments are encoded as data: uri. Even though these may
+     * be valid in vCard 3.0 as well, we should convert those to BINARY if
+     * possible, to improve compatibility.
+     *
+     * @param Component\VCard $output
+     * @param Property\Uri $property The input property.
+     * @return Property\Binary|null
+     */
+    protected function convertUriToBinary(Component\VCard $output, Property\Uri $newProperty) {
+
+        $value = $newProperty->getValue();
+
+        // Only converting data: uris
+        if (substr($value, 0, 5)!=='data:') {
+            return $newProperty;
+        }
+
+        $newProperty = $output->createProperty(
+            $newProperty->name,
+            null, // no value
+            array(), // no parameters yet
+            'BINARY'
+        );
+
+        $mimeType = substr($value, 5, strpos($value, ',')-5);
+        if (strpos($mimeType, ';')) {
+            $mimeType = substr($mimeType,0,strpos($mimeType, ';'));
+            $newProperty->setValue(base64_decode(substr($value, strpos($value,',')+1)));
+        } else {
+            $newProperty->setValue(substr($value, strpos($value,',')+1));
+        }
+        unset($value);
+
+        $newProperty['ENCODING'] = 'b';
+        switch($mimeType) {
+
+            case 'image/jpeg' :
+                $newProperty['TYPE'] = 'JPEG';
+                break;
+            case 'image/png' :
+                $newProperty['TYPE'] = 'PNG';
+                break;
+            case 'image/gif' :
+                $newProperty['TYPE'] = 'GIF';
+                break;
+
+        }
+
+
+        return $newProperty;
+
+    }
+
+    /**
+     * Adds parameters to a new property for vCard 4.0
+     *
+     * @param Property $newProperty
+     * @param array $parameters
+     * @return void
+     */
+    protected function convertParameters40(Property $newProperty, array $parameters) {
+
+        // Adding all parameters.
+        foreach($parameters as $param) {
+
+            // vCard 2.1 allowed parameters with no name
+            if ($param->noName) $param->noName = false;
+
+            switch($param->name) {
+
+                // We need to see if there's any TYPE=PREF, because in vCard 4
+                // that's now PREF=1.
+                case 'TYPE' :
+                    foreach($param->getParts() as $paramPart) {
+
+                        if (strtoupper($paramPart)==='PREF') {
+                            $newProperty->add('PREF','1');
+                        } else {
+                            $newProperty->add($param->name, $paramPart);
+                        }
+
+                    }
+                    break;
+                // These no longer exist in vCard 4
+                case 'ENCODING' :
+                case 'CHARSET' :
+                    break;
+
+                default :
+                    $newProperty->add($param->name, $param->getParts());
+                    break;
+
+            }
+
+        }
+
+    }
+
+    /**
+     * Adds parameters to a new property for vCard 3.0
+     *
+     * @param Property $newProperty
+     * @param array $parameters
+     * @return void
+     */
+    protected function convertParameters30(Property $newProperty, array $parameters) {
+
+        // Adding all parameters.
+        foreach($parameters as $param) {
+
+            // vCard 2.1 allowed parameters with no name
+            if ($param->noName) $param->noName = false;
+
+            switch($param->name) {
+
+                case 'ENCODING' :
+                    // This value only existed in vCard 2.1, and should be
+                    // removed for anything else.
+                    if (strtoupper($param->getValue())!=='QUOTED-PRINTABLE') {
+                        $newProperty->add($param->name, $param->getParts());
+                    }
+                    break;
+
+                /*
+                 * Converting PREF=1 to TYPE=PREF.
+                 *
+                 * Any other PREF numbers we'll drop.
+                 */
+                case 'PREF' :
+                    if ($param->getValue()=='1') {
+                        $newProperty->add('TYPE','PREF');
+                    }
+                    break;
+
+                default :
+                    $newProperty->add($param->name, $param->getParts());
+                    break;
+
+            }
+
+        }
+
+    }
+}