<?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(_('Invalid XML.')); } $xrd_element = $dom->getElementsByTagName('XRD')->item(0); if (!$xrd_element) { // TRANS: Exception. throw new Exception(_('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(); $properties = array(); if (isset($link['title'])) { $titles = $link['title']; unset($link['title']); } if (isset($link['property'])) { $properties = $link['property']; unset($link['property']); } $xs->elementStart('Link', $link); foreach ($titles as $title) { $xs->element('Title', null, $title); } foreach ($properties as $property) { $xs->element('Property', array('type' => $property['type']), $property['value']); } $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; break; case 'Property': $link['property'][] = array('type' => $node->getAttribute('type'), 'value' => $node->nodeValue); break; default: common_log(LOG_NOTICE, "Unexpected tag name {$node->tagName} found in XRD file."); } } } return $link; } }