Parsing hcards for the data we need wasn't hard enough to justify using hkit. It was dependent on a number of external systems (something to run tidy), and only could handle XHTML. We now parse HTML with the PHP dom libraries used elsewhere, and scrape out our own hcards. Seems to work nicer and faster and most of all works with Google Buzz profile URLs.
249 lines
6.6 KiB
PHP
249 lines
6.6 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* Some utilities for generating hint data
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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class DiscoveryHints {
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static function fromXRD($xrd)
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{
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$hints = array();
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foreach ($xrd->links as $link) {
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switch ($link['rel']) {
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case Discovery::PROFILEPAGE:
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$hints['profileurl'] = $link['href'];
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break;
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case Salmon::NS_REPLIES:
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$hints['salmon'] = $link['href'];
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break;
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case Discovery::UPDATESFROM:
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$hints['feedurl'] = $link['href'];
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break;
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case Discovery::HCARD:
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$hints['hcardurl'] = $link['href'];
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break;
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default:
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break;
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}
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}
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return $hints;
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}
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static function fromHcardUrl($url)
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{
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$client = new HTTPClient();
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$client->setHeader('Accept', 'text/html,application/xhtml+xml');
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$response = $client->get($url);
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if (!$response->isOk()) {
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return null;
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}
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return self::hcardHints($response->getBody(),
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$response->getUrl());
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}
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static function hcardHints($body, $url)
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{
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$hcard = self::_hcard($body, $url);
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$hints = array();
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// XXX: don't copy stuff into an array and then copy it again
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if (array_key_exists('nickname', $hcard)) {
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$hints['nickname'] = $hcard['nickname'];
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}
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if (array_key_exists('fn', $hcard)) {
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$hints['fullname'] = $hcard['fn'];
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} else if (array_key_exists('n', $hcard)) {
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$hints['fullname'] = implode(' ', $hcard['n']);
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}
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if (array_key_exists('photo', $hcard)) {
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$hints['avatar'] = $hcard['photo'][0];
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}
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if (array_key_exists('note', $hcard)) {
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$hints['bio'] = $hcard['note'];
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}
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if (array_key_exists('adr', $hcard)) {
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if (is_string($hcard['adr'])) {
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$hints['location'] = $hcard['adr'];
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} else if (is_array($hcard['adr'])) {
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$hints['location'] = implode(' ', $hcard['adr']);
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}
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}
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if (array_key_exists('url', $hcard)) {
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if (is_string($hcard['url'])) {
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$hints['homepage'] = $hcard['url'];
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} else if (is_array($hcard['url'])) {
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// HACK get the last one; that's how our hcards look
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$hints['homepage'] = $hcard['url'][count($hcard['url'])-1];
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}
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}
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return $hints;
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}
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static function _hcard($body, $url)
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{
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// DOMDocument::loadHTML may throw warnings on unrecognized elements.
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$old = error_reporting(error_reporting() & ~E_WARNING);
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$doc = new DOMDocument();
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$doc->loadHTML($body);
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error_reporting($old);
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$xp = new DOMXPath($doc);
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$hcardNodes = self::_getChildrenByClass($doc->documentElement, 'vcard', $xp);
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$hcards = array();
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for ($i = 0; $i < $hcardNodes->length; $i++) {
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$hcardNode = $hcardNodes->item($i);
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$hcard = self::_hcardFromNode($hcardNode, $xp, $url);
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$hcards[] = $hcard;
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}
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$repr = null;
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foreach ($hcards as $hcard) {
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if (in_array($url, $hcard['url'])) {
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$repr = $hcard;
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break;
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}
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}
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if (!is_null($repr)) {
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return $repr;
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} else if (count($hcards) > 0) {
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return $hcards[0];
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} else {
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return null;
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}
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}
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function _getChildrenByClass($el, $cls, $xp)
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{
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// borrowed from hkit. Thanks dudes!
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$qry = ".//*[contains(concat(' ',normalize-space(@class),' '),' $cls ')]";
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$nodes = $xp->query($qry, $el);
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return $nodes;
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}
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function _hcardFromNode($hcardNode, $xp, $base)
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{
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$hcard = array();
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$hcard['url'] = array();
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$urlNodes = self::_getChildrenByClass($hcardNode, 'url', $xp);
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for ($j = 0; $j < $urlNodes->length; $j++) {
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$urlNode = $urlNodes->item($j);
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if ($urlNode->hasAttribute('href')) {
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$url = $urlNode->getAttribute('href');
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} else {
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$url = $urlNode->textContent;
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}
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$hcard['url'][] = self::_rel2abs($url, $base);
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}
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$hcard['photo'] = array();
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$photoNodes = self::_getChildrenByClass($hcardNode, 'photo', $xp);
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for ($j = 0; $j < $photoNodes->length; $j++) {
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$photoNode = $photoNodes->item($j);
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if ($photoNode->hasAttribute('src')) {
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$url = $photoNode->getAttribute('src');
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} else if ($photoNode->hasAttribute('href')) {
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$url = $photoNode->getAttribute('href');
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} else {
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$url = $photoNode->textContent;
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}
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$hcard['photo'][] = self::_rel2abs($url, $base);
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}
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$singles = array('nickname', 'note', 'fn', 'n', 'adr');
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foreach ($singles as $single) {
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$nodes = self::_getChildrenByClass($hcardNode, $single, $xp);
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if ($nodes->length > 0) {
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$node = $nodes->item(0);
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$hcard[$single] = $node->textContent;
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}
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}
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return $hcard;
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}
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// XXX: this is a first pass; we probably need
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// to handle things like ../ and ./ and so on
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static function _rel2abs($rel, $wrt)
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{
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$parts = parse_url($rel);
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if ($parts === false) {
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return false;
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}
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// If it's got a scheme, use it
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if ($parts['scheme'] != '') {
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return $rel;
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}
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$w = parse_url($wrt);
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$base = $w['scheme'].'://'.$w['host'];
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if ($rel[0] == '/') {
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return $base.$rel;
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}
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$wp = explode('/', $w['path']);
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array_pop($wp);
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return $base.implode('/', $wp).'/'.$rel;
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}
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}
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