gnu-social/plugins/LRDD/extlib/XML/XRD/Loader/XML.php

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<?php
/**
* Part of XML_XRD
*
* PHP version 5
*
* @category XML
* @package XML_XRD
* @author Christian Weiske <cweiske@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @link http://pear.php.net/package/XML_XRD
*/
/**
* Loads XRD data from an XML file
*
* @category XML
* @package XML_XRD
* @author Christian Weiske <cweiske@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @version Release: @package_version@
* @link http://pear.php.net/package/XML_XRD
*/
class XML_XRD_Loader_XML
{
/**
* Data storage the XML data get loaded into
*
* @var XML_XRD
*/
protected $xrd;
/**
* XRD 1.0 namespace
*/
const NS_XRD = 'http://docs.oasis-open.org/ns/xri/xrd-1.0';
/**
* Init object with xrd object
*
* @param XML_XRD $xrd Data storage the XML data get loaded into
*/
public function __construct(XML_XRD $xrd)
{
$this->xrd = $xrd;
}
/**
* Loads the contents of the given file
*
* @param string $file Path to an XRD file
*
* @return void
*
* @throws XML_XRD_Loader_Exception When the XML is invalid or cannot be
* loaded
*/
public function loadFile($file)
{
$old = libxml_use_internal_errors(true);
$x = simplexml_load_file($file);
libxml_use_internal_errors($old);
if ($x === false) {
throw new XML_XRD_Loader_Exception(
'Error loading XML file: ' . libxml_get_last_error()->message,
XML_XRD_Loader_Exception::LOAD
);
}
return $this->load($x);
}
/**
* Loads the contents of the given string
*
* @param string $xml XML string
*
* @return void
*
* @throws XML_XRD_Loader_Exception When the XML is invalid or cannot be
* loaded
*/
public function loadString($xml)
{
if ($xml == '') {
throw new XML_XRD_Loader_Exception(
'Error loading XML string: string empty',
XML_XRD_Loader_Exception::LOAD
);
}
$old = libxml_use_internal_errors(true);
$x = simplexml_load_string($xml);
libxml_use_internal_errors($old);
if ($x === false) {
throw new XML_XRD_Loader_Exception(
'Error loading XML string: ' . libxml_get_last_error()->message,
XML_XRD_Loader_Exception::LOAD
);
}
return $this->load($x);
}
/**
* Loads the XML element into the classes' data structures
*
* @param object $x XML element containing the whole XRD document
*
* @return void
*
* @throws XML_XRD_Loader_Exception When the XML is invalid
*/
public function load(SimpleXMLElement $x)
{
$ns = $x->getDocNamespaces();
if ($ns[''] !== self::NS_XRD) {
throw new XML_XRD_Loader_Exception(
'Wrong document namespace', XML_XRD_Loader_Exception::DOC_NS
);
}
if ($x->getName() != 'XRD') {
throw new XML_XRD_Loader_Exception(
'XML root element is not "XRD"', XML_XRD_Loader_Exception::DOC_ROOT
);
}
if (isset($x->Subject)) {
$this->xrd->subject = (string)$x->Subject;
}
foreach ($x->Alias as $xAlias) {
$this->xrd->aliases[] = (string)$xAlias;
}
foreach ($x->Link as $xLink) {
$this->xrd->links[] = $this->loadLink($xLink);
}
$this->loadProperties($this->xrd, $x);
if (isset($x->Expires)) {
$this->xrd->expires = strtotime($x->Expires);
}
$xmlAttrs = $x->attributes('http://www.w3.org/XML/1998/namespace');
if (isset($xmlAttrs['id'])) {
$this->xrd->id = (string)$xmlAttrs['id'];
}
}
/**
* Loads the Property elements from XML
*
* @param object $store Data store where the properties get stored
* @param object $x XML element
*
* @return boolean True when all went well
*/
protected function loadProperties(
XML_XRD_PropertyAccess $store, SimpleXMLElement $x
) {
foreach ($x->Property as $xProp) {
$store->properties[] = $this->loadProperty($xProp);
}
}
/**
* Create a link element object from XML element
*
* @param object $x XML link element
*
* @return XML_XRD_Element_Link Created link object
*/
protected function loadLink(SimpleXMLElement $x)
{
$link = new XML_XRD_Element_Link();
foreach (array('rel', 'type', 'href', 'template') as $var) {
if (isset($x[$var])) {
$link->$var = (string)$x[$var];
}
}
foreach ($x->Title as $xTitle) {
$xmlAttrs = $xTitle->attributes('http://www.w3.org/XML/1998/namespace');
$lang = '';
if (isset($xmlAttrs['lang'])) {
$lang = (string)$xmlAttrs['lang'];
}
if (!isset($link->titles[$lang])) {
$link->titles[$lang] = (string)$xTitle;
}
}
$this->loadProperties($link, $x);
return $link;
}
/**
* Create a property element object from XML element
*
* @param object $x XML property element
*
* @return XML_XRD_Element_Property Created link object
*/
protected function loadProperty(SimpleXMLElement $x)
{
$prop = new XML_XRD_Element_Property();
if (isset($x['type'])) {
$prop->type = (string)$x['type'];
}
$s = (string)$x;
if ($s != '') {
$prop->value = $s;
}
return $prop;
}
}
?>