/**
* Constructor for OMB_Service_Consumer
*
* Initializes an OMB_Service_Consumer object representing the OMB service
* specified by $service_url. Performs a complete service discovery using
* Yadis.
* Throws OMB_UnsupportedServiceException if XRDS file does not specify a
* complete OMB service.
*
* @param string $service_url The URL of the service
* @param string $consumer_url An URL representing the consumer
* @param OMB_Datastore $datastore An instance of a class implementing
* OMB_Datastore
*
* @access public
*/
public function __construct($service_url, $consumer_url, $datastore)
{
$this->url = $service_url;
$this->fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
$this->datastore = $datastore;
$this->oauth_consumer = new OAuthConsumer($consumer_url, '');
$xrds = OMB_Yadis_XRDS::fromYadisURL($service_url, $this->fetcher);
/* Detect our services. This performs a validation as well, since
getService und getXRD throw exceptions on failure. */
$this->services = array();
foreach (array(OAUTH_DISCOVERY => OMB_Helper::$OAUTH_SERVICES, OMB_VERSION => OMB_Helper::$OMB_SERVICES) as $service_root => $targetservices) {
$uris = $xrds->getService($service_root)->getURIs();
$xrd = $xrds->getXRD($uris[0]);
foreach ($targetservices as $targetservice) {
$yadis_service = $xrd->getService($targetservice);
if ($targetservice == OAUTH_ENDPOINT_REQUEST) {
$localid = $yadis_service->getElements('xrd:LocalID');
$this->listener_uri = $yadis_service->parser->content($localid[0]);
}
$uris = $yadis_service->getURIs();
$this->services[$targetservice] = $uris[0];
}
}
}
/**
* Get a specific XRD
*
* Returns the OMB_Yadis_XRDS object corresponding to the given URI.
* Throws an OMB_UnsupportedServiceException if the XRD is not available.
* Note that getXRD tries to resolve external XRD parts as well.
*
* @param string $uri URI specifier of the requested XRD
*
* @access public
*
* @return OMB_Yadis_XRDS The object representing the requested XRD
*/
public function getXRD($uri)
{
$nexthash = strpos($uri, '#');
if ($nexthash === false) {
throw new OMB_InvalidYadisException("‘{$uri’} does not specify a " . 'valid XML node.');
}
if ($nexthash > 0) {
$cururi = substr($uri, 0, $nexthash);
$nexturi = substr($uri, $nexthash);
return OMB_Yadis_XRDS::fromYadisURL($cururi, $this->fetcher)->getXRD($nexturi);
}
$id = substr($uri, 1);
foreach ($this->allXrdNodes as $node) {
$attrs = $this->parser->attributes($node);
if (array_key_exists('xml:id', $attrs) && $attrs['xml:id'] == $id) {
/* Trick the constructor into thinking this is the only node. */
$bogus_nodes = array($node);
return new OMB_Yadis_XRDS($this->parser, $bogus_nodes);
}
}
throw new OMB_UnsupportedServiceException($uri);
}
