SimpleSAML\SAML2\XML\md\AbstractRoleDescriptor::fromXML()

Complexity

Conditions	7
Paths	8

Size

Total Lines	59
Code Lines	41

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public static function fromXML(DOMElement $xml): static
    {
        Assert::same($xml->localName, 'RoleDescriptor', InvalidDOMElementException::class);
        Assert::same($xml->namespaceURI, C::NS_MD, InvalidDOMElementException::class);
        Assert::true(
            $xml->hasAttributeNS(C::NS_XSI, 'type'),
            'Missing required xsi:type in <saml:RoleDescriptor> element.',
            SchemaViolationException::class
        );

        $type = $xml->getAttributeNS(C::NS_XSI, 'type');
        Assert::validQName($type, SchemaViolationException::class);

        // first, try to resolve the type to a full namespaced version
        $qname = explode(':', $type, 2);
        if (count($qname) === 2) {
            list($prefix, $element) = $qname;
        } else {
            $prefix = null;
            list($element) = $qname;
        }
        $ns = $xml->lookupNamespaceUri($prefix);
        $type = ($ns === null ) ? $element : implode(':', [$ns, $element]);

        // now check if we have a handler registered for it
        $handler = Utils::getContainer()->getExtensionHandler($type);
        if ($handler === null) {
            // we don't have a handler, proceed with unknown identifier
            $protocols = self::getAttribute($xml, 'protocolSupportEnumeration');

            $validUntil = self::getAttribute($xml, 'validUntil', null);
            $orgs = Organization::getChildrenOfClass($xml);
            Assert::maxCount($orgs, 1, 'More than one Organization found in this descriptor', TooManyElementsException::class);

            $extensions = Extensions::getChildrenOfClass($xml);
            Assert::maxCount($extensions, 1, 'Only one md:Extensions element is allowed.', TooManyElementsException::class);

            return new UnknownRoleDescriptor(
                new Chunk($xml),
                $type,
                preg_split('/[\s]+/', trim($protocols)),
                self::getAttribute($xml, 'ID', null),
                $validUntil !== null ? XMLUtils::xsDateTimeToTimestamp($validUntil) : null,
                self::getAttribute($xml, 'cacheDuration', null),
                !empty($extensions) ? $extensions[0] : null,
                self::getAttribute($xml, 'errorURL', null),
                KeyDescriptor::getChildrenOfClass($xml),
                !empty($orgs) ? $orgs[0] : null,
                ContactPerson::getChildrenOfClass($xml),
            );
        }

        Assert::subclassOf(
            $handler,
            AbstractRoleDescriptor::class,
            'Elements implementing RoleDescriptor must extend \SimpleSAML\SAML2\XML\saml\AbstractRoleDescriptor.',
        );

        return $handler::fromXML($xml);
    }