PropPatch.php

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<?php
 
namespace Sabre\DAV\Xml\Request;
 
use Sabre\Xml\Element;
use Sabre\Xml\Reader;
use Sabre\Xml\Writer;
 
class PropPatch implements Element {
 
    public $properties = [];
 
    function xmlSerialize(Writer $writer) {
 
        foreach ($this->properties as $propertyName => $propertyValue) {
 
            if (is_null($propertyValue)) {
                $writer->startElement("{DAV:}remove");
                $writer->write(['{DAV:}prop' => [$propertyName => $propertyValue]]);
                $writer->endElement();
            } else {
                $writer->startElement("{DAV:}set");
                $writer->write(['{DAV:}prop' => [$propertyName => $propertyValue]]);
                $writer->endElement();
            }
 
        }
 
    }
 
    static function xmlDeserialize(Reader $reader) {
 
        $self = new self();
 
        $elementMap = $reader->elementMap;
        $elementMap['{DAV:}prop'] = 'Sabre\DAV\Xml\Element\Prop';
        $elementMap['{DAV:}set'] = 'Sabre\Xml\Element\KeyValue';
        $elementMap['{DAV:}remove'] = 'Sabre\Xml\Element\KeyValue';
 
        $elems = $reader->parseInnerTree($elementMap);
 
        foreach ($elems as $elem) {
            if ($elem['name'] === '{DAV:}set') {
                $self->properties = array_merge($self->properties, $elem['value']['{DAV:}prop']);
            }
            if ($elem['name'] === '{DAV:}remove') {
 
                // Ensuring there are no values.
                foreach ($elem['value']['{DAV:}prop'] as $remove => $value) {
                    $self->properties[$remove] = null;
                }
 
            }
        }
 
        return $self;
 
    }
 
}