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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* Some utilities for generating hint data
*
* 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/>.
*/
class DiscoveryHints {
static function fromXRD($xrd)
{
$hints = array();
foreach ($xrd->links as $link) {
switch ($link['rel']) {
case Discovery::PROFILEPAGE:
$hints['profileurl'] = $link['href'];
break;
case Salmon::NS_REPLIES:
$hints['salmon'] = $link['href'];
break;
case Discovery::UPDATESFROM:
$hints['feedurl'] = $link['href'];
break;
case Discovery::HCARD:
$hints['hcardurl'] = $link['href'];
break;
default:
break;
}
}
return $hints;
}
static function fromHcardUrl($url)
{
$client = new HTTPClient();
$client->setHeader('Accept', 'text/html,application/xhtml+xml');
$response = $client->get($url);
if (!$response->isOk()) {
return null;
}
return self::hcardHints($response->getBody(),
$response->getUrl());
}
static function hcardHints($body, $url)
{
$hcard = self::_hcard($body, $url);
$hints = array();
// XXX: don't copy stuff into an array and then copy it again
if (array_key_exists('nickname', $hcard)) {
$hints['nickname'] = $hcard['nickname'];
}
if (array_key_exists('fn', $hcard)) {
$hints['fullname'] = $hcard['fn'];
} else if (array_key_exists('n', $hcard)) {
$hints['fullname'] = implode(' ', $hcard['n']);
}
if (array_key_exists('photo', $hcard)) {
$hints['avatar'] = $hcard['photo'][0];
}
if (array_key_exists('note', $hcard)) {
$hints['bio'] = $hcard['note'];
}
if (array_key_exists('adr', $hcard)) {
if (is_string($hcard['adr'])) {
$hints['location'] = $hcard['adr'];
} else if (is_array($hcard['adr'])) {
$hints['location'] = implode(' ', $hcard['adr']);
}
}
if (array_key_exists('url', $hcard)) {
if (is_string($hcard['url'])) {
$hints['homepage'] = $hcard['url'];
} else if (is_array($hcard['url'])) {
// HACK get the last one; that's how our hcards look
$hints['homepage'] = $hcard['url'][count($hcard['url'])-1];
}
}
return $hints;
}
static function _hcard($body, $url)
{
// DOMDocument::loadHTML may throw warnings on unrecognized elements.
$old = error_reporting(error_reporting() & ~E_WARNING);
$doc = new DOMDocument();
$doc->loadHTML($body);
error_reporting($old);
$xp = new DOMXPath($doc);
$hcardNodes = self::_getChildrenByClass($doc->documentElement, 'vcard', $xp);
$hcards = array();
for ($i = 0; $i < $hcardNodes->length; $i++) {
$hcardNode = $hcardNodes->item($i);
$hcard = self::_hcardFromNode($hcardNode, $xp, $url);
$hcards[] = $hcard;
}
$repr = null;
foreach ($hcards as $hcard) {
if (in_array($url, $hcard['url'])) {
$repr = $hcard;
break;
}
}
if (!is_null($repr)) {
return $repr;
} else if (count($hcards) > 0) {
return $hcards[0];
} else {
return null;
}
}
function _getChildrenByClass($el, $cls, $xp)
{
// borrowed from hkit. Thanks dudes!
$qry = ".//*[contains(concat(' ',normalize-space(@class),' '),' $cls ')]";
$nodes = $xp->query($qry, $el);
return $nodes;
}
function _hcardFromNode($hcardNode, $xp, $base)
{
$hcard = array();
$hcard['url'] = array();
$urlNodes = self::_getChildrenByClass($hcardNode, 'url', $xp);
for ($j = 0; $j < $urlNodes->length; $j++) {
$urlNode = $urlNodes->item($j);
if ($urlNode->hasAttribute('href')) {
$url = $urlNode->getAttribute('href');
} else {
$url = $urlNode->textContent;
}
$hcard['url'][] = self::_rel2abs($url, $base);
}
$hcard['photo'] = array();
$photoNodes = self::_getChildrenByClass($hcardNode, 'photo', $xp);
for ($j = 0; $j < $photoNodes->length; $j++) {
$photoNode = $photoNodes->item($j);
if ($photoNode->hasAttribute('src')) {
$url = $photoNode->getAttribute('src');
} else if ($photoNode->hasAttribute('href')) {
$url = $photoNode->getAttribute('href');
} else {
$url = $photoNode->textContent;
}
$hcard['photo'][] = self::_rel2abs($url, $base);
}
$singles = array('nickname', 'note', 'fn', 'n', 'adr');
foreach ($singles as $single) {
$nodes = self::_getChildrenByClass($hcardNode, $single, $xp);
if ($nodes->length > 0) {
$node = $nodes->item(0);
$hcard[$single] = $node->textContent;
}
}
return $hcard;
}
// XXX: this is a first pass; we probably need
// to handle things like ../ and ./ and so on
static function _rel2abs($rel, $wrt)
{
$parts = parse_url($rel);
if ($parts === false) {
return false;
}
// If it's got a scheme, use it
if ($parts['scheme'] != '') {
return $rel;
}
$w = parse_url($wrt);
$base = $w['scheme'].'://'.$w['host'];
if ($rel[0] == '/') {
return $base.$rel;
}
$wp = explode('/', $w['path']);
array_pop($wp);
return $base.implode('/', $wp).'/'.$rel;
}
}
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