diff options
Diffstat (limited to 'plugins/OStatus/lib/discoveryhints.php')
| -rw-r--r-- | plugins/OStatus/lib/discoveryhints.php | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/plugins/OStatus/lib/discoveryhints.php b/plugins/OStatus/lib/discoveryhints.php new file mode 100644 index 000000000..34c9be277 --- /dev/null +++ b/plugins/OStatus/lib/discoveryhints.php @@ -0,0 +1,253 @@ +<?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_MENTIONS: + 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, $url); + + if (empty($hcard)) { + return array(); + } + + $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', $hcard) && count($hcard['photo'])) { + $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']) && !empty($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 ($parts === false) { + return false; + } + + // If it's got a scheme, use it + + if (!empty($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; + } +} |