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gnu-social-v2-archive-activ.../utils/discoveryhints.php

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<?php
/**
* GNU social - a federating social network
*
* Some utilities for generating hint data
*
* LICENCE: 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/>.
*
* @category Plugin
* @package GNUsocial
* @author GNUsocial
* @copyright 2010 Free Software Foundation http://fsf.org
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link https://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) {
exit(1);
}
class DiscoveryHints
{
public static function fromXRD(XML_XRD $xrd)
{
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$hints = [];
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if (Event::handle('StartDiscoveryHintsFromXRD', [$xrd, &$hints])) {
foreach ($xrd->links as $link) {
switch ($link->rel) {
case WebFingerResource_Profile::PROFILEPAGE:
$hints['profileurl'] = $link->href;
break;
$hints['salmon'] = $link->href;
break;
case Discovery::UPDATESFROM:
if (empty($link->type) || $link->type == 'application/atom+xml') {
$hints['feedurl'] = $link->href;
}
break;
case Discovery::HCARD:
case Discovery::MF2_HCARD:
$hints['hcard'] = $link->href;
break;
default:
break;
}
}
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Event::handle('EndDiscoveryHintsFromXRD', [$xrd, &$hints]);
}
return $hints;
}
public static function fromHcardUrl($url)
{
$client = new HTTPClient();
$client->setHeader('Accept', 'text/html,application/xhtml+xml');
try {
$response = $client->get($url);
if (!$response->isOk()) {
return null;
}
} catch (HTTP_Request2_Exception $e) {
// Any HTTPClient error that might've been thrown
common_log(LOG_ERR, __METHOD__ . ':'.$e->getMessage());
return null;
}
return self::hcardHints(
$response->getBody(),
$response->getEffectiveUrl()
);
}
public static function hcardHints($body, $url)
{
$hcard = self::_hcard($body, $url);
if (empty($hcard)) {
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return [];
}
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$hints = [];
// XXX: don't copy stuff into an array and then copy it again
if (array_key_exists('nickname', $hcard) && !empty($hcard['nickname'][0])) {
$hints['nickname'] = $hcard['nickname'][0];
}
if (array_key_exists('name', $hcard) && !empty($hcard['name'][0])) {
$hints['fullname'] = $hcard['name'][0];
}
if (array_key_exists('photo', $hcard) && count($hcard['photo'])) {
$hints['avatar'] = $hcard['photo'][0];
}
if (array_key_exists('note', $hcard) && !empty($hcard['note'][0])) {
$hints['bio'] = $hcard['note'][0];
}
if (array_key_exists('adr', $hcard) && !empty($hcard['adr'][0])) {
$hints['location'] = $hcard['adr'][0]['value'];
}
if (array_key_exists('url', $hcard) && !empty($hcard['url'][0])) {
$hints['homepage'] = $hcard['url'][0];
}
return $hints;
}
public static function _hcard($body, $url)
{
$mf2 = new Mf2\Parser($body, $url);
$mf2 = $mf2->parse();
if (empty($mf2['items'])) {
return null;
}
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$hcards = [];
foreach ($mf2['items'] as $item) {
if (!in_array('h-card', $item['type'])) {
continue;
}
// We found a match, return it immediately
if (isset($item['properties']['url']) && in_array($url, $item['properties']['url'])) {
return $item['properties'];
}
// Let's keep all the hcards for later, to return one of them at least
$hcards[] = $item['properties'];
}
// No match immediately for the url we expected, but there were h-cards found
if (count($hcards) > 0) {
return $hcards[0];
}
return null;
}
}