forked from GNUsocial/gnu-social
129 lines
4.1 KiB
PHP
129 lines
4.1 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* An activity
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*
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* PHP version 5
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*
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* LICENCE: 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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* @category Feed
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @author Zach Copley <zach@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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class ActivityContext
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{
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public $replyToID;
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public $replyToUrl;
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public $location;
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public $attention = array();
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public $conversation;
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const THR = 'http://purl.org/syndication/thread/1.0';
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const GEORSS = 'http://www.georss.org/georss';
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const OSTATUS = 'http://ostatus.org/schema/1.0';
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const INREPLYTO = 'in-reply-to';
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const REF = 'ref';
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const HREF = 'href';
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const POINT = 'point';
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const ATTENTION = 'ostatus:attention';
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const MENTIONED = 'mentioned';
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const CONVERSATION = 'ostatus:conversation';
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function __construct($element)
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{
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$replyToEl = ActivityUtils::child($element, self::INREPLYTO, self::THR);
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if (!empty($replyToEl)) {
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$this->replyToID = $replyToEl->getAttribute(self::REF);
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$this->replyToUrl = $replyToEl->getAttribute(self::HREF);
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}
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$this->location = $this->getLocation($element);
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$this->conversation = ActivityUtils::getLink($element, self::CONVERSATION);
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// Multiple attention links allowed
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$links = $element->getElementsByTagNameNS(ActivityUtils::ATOM, ActivityUtils::LINK);
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$attention = array();
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for ($i = 0; $i < $links->length; $i++) {
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$link = $links->item($i);
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$linkRel = $link->getAttribute(ActivityUtils::REL);
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// XXX: Deprecate this in favour of "mentioned" from Salmon spec
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// http://salmon-protocol.googlecode.com/svn/trunk/draft-panzer-salmon-00.html#SALR
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if ($linkRel == self::ATTENTION) {
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$attention[] = $link->getAttribute(self::HREF);
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} elseif ($linkRel == self::MENTIONED) {
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$attention[] = $link->getAttribute(self::HREF);
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}
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}
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$this->attention = array_unique($attention);
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}
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/**
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* Parse location given as a GeoRSS-simple point, if provided.
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* http://www.georss.org/simple
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*
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* @param feed item $entry
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* @return mixed Location or false
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*/
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function getLocation($dom)
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{
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$points = $dom->getElementsByTagNameNS(self::GEORSS, self::POINT);
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for ($i = 0; $i < $points->length; $i++) {
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$point = $points->item($i)->textContent;
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return self::locationFromPoint($point);
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}
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return null;
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}
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// XXX: Move to ActivityUtils or Location?
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static function locationFromPoint($point)
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{
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$point = str_replace(',', ' ', $point); // per spec "treat commas as whitespace"
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$point = preg_replace('/\s+/', ' ', $point);
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$point = trim($point);
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$coords = explode(' ', $point);
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if (count($coords) == 2) {
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list($lat, $lon) = $coords;
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if (is_numeric($lat) && is_numeric($lon)) {
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common_log(LOG_INFO, "Looking up location for $lat $lon from georss point");
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return Location::fromLatLon($lat, $lon);
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}
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}
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common_log(LOG_ERR, "Ignoring bogus georss:point value $point");
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return null;
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}
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}
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