diff options
Diffstat (limited to 'lib/xrd.php')
| -rw-r--r-- | lib/xrd.php | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/lib/xrd.php b/lib/xrd.php new file mode 100644 index 000000000..c8cffed9c --- /dev/null +++ b/lib/xrd.php @@ -0,0 +1,172 @@ +<?php +/** + * StatusNet - the distributed open-source microblogging tool + * Copyright (C) 2010, StatusNet, Inc. + * + * A sample module to show best practices for StatusNet plugins + * + * PHP version 5 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * @package StatusNet + * @author James Walker <james@status.net> + * @copyright 2010 StatusNet, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0 + * @link http://status.net/ + */ + +class XRD +{ + const XML_NS = 'http://www.w3.org/2000/xmlns/'; + + const XRD_NS = 'http://docs.oasis-open.org/ns/xri/xrd-1.0'; + + const HOST_META_NS = 'http://host-meta.net/xrd/1.0'; + + public $expires; + + public $subject; + + public $host; + + public $alias = array(); + + public $types = array(); + + public $links = array(); + + public static function parse($xml) + { + $xrd = new XRD(); + + $dom = new DOMDocument(); + + // Don't spew XML warnings to output + $old = error_reporting(); + error_reporting($old & ~E_WARNING); + $ok = $dom->loadXML($xml); + error_reporting($old); + + if (!$ok) { + // TRANS: Exception. + throw new Exception(_m('Invalid XML.')); + } + $xrd_element = $dom->getElementsByTagName('XRD')->item(0); + if (!$xrd_element) { + // TRANS: Exception. + throw new Exception(_m('Invalid XML, missing XRD root.')); + } + + // Check for host-meta host + $host = $xrd_element->getElementsByTagName('Host')->item(0); + if ($host) { + $xrd->host = $host->nodeValue; + } + + // Loop through other elements + foreach ($xrd_element->childNodes as $node) { + if (!($node instanceof DOMElement)) { + continue; + } + switch ($node->tagName) { + case 'Expires': + $xrd->expires = $node->nodeValue; + break; + case 'Subject': + $xrd->subject = $node->nodeValue; + break; + + case 'Alias': + $xrd->alias[] = $node->nodeValue; + break; + + case 'Link': + $xrd->links[] = $xrd->parseLink($node); + break; + + case 'Type': + $xrd->types[] = $xrd->parseType($node); + break; + + } + } + return $xrd; + } + + public function toXML() + { + $xs = new XMLStringer(); + + $xs->startXML(); + $xs->elementStart('XRD', array('xmlns' => XRD::XRD_NS)); + + if ($this->host) { + $xs->element('hm:Host', array('xmlns:hm' => XRD::HOST_META_NS), $this->host); + } + + if ($this->expires) { + $xs->element('Expires', null, $this->expires); + } + + if ($this->subject) { + $xs->element('Subject', null, $this->subject); + } + + foreach ($this->alias as $alias) { + $xs->element('Alias', null, $alias); + } + + foreach ($this->links as $link) { + $titles = array(); + if (isset($link['title'])) { + $titles = $link['title']; + unset($link['title']); + } + $xs->elementStart('Link', $link); + foreach ($titles as $title) { + $xs->element('Title', null, $title); + } + $xs->elementEnd('Link'); + } + + $xs->elementEnd('XRD'); + + return $xs->getString(); + } + + function parseType($element) + { + return array(); + } + + function parseLink($element) + { + $link = array(); + $link['rel'] = $element->getAttribute('rel'); + $link['type'] = $element->getAttribute('type'); + $link['href'] = $element->getAttribute('href'); + $link['template'] = $element->getAttribute('template'); + foreach ($element->childNodes as $node) { + if ($node instanceof DOMElement) { + switch($node->tagName) { + case 'Title': + $link['title'][] = $node->nodeValue; + } + } + } + + return $link; + } +} |