forked from GNUsocial/gnu-social
351 lines
10 KiB
PHP
351 lines
10 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009, StatusNet, Inc.
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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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/**
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* @package FeedSubPlugin
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* @maintainer Brion Vibber <brion@status.net>
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
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class FeedSubPreviewNotice extends Notice
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{
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protected $fetched = true;
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function __construct($profile)
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{
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$this->profile = $profile;
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$this->profile_id = 0;
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}
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function getProfile()
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{
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return $this->profile;
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}
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function find()
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{
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return true;
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}
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function fetch()
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{
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$got = $this->fetched;
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$this->fetched = false;
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return $got;
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}
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}
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class FeedSubPreviewProfile extends Profile
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{
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function getAvatar($width, $height=null)
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{
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return new FeedSubPreviewAvatar($width, $height, $this->avatar);
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}
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}
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class FeedSubPreviewAvatar extends Avatar
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{
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function __construct($width, $height, $remote)
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{
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$this->remoteImage = $remote;
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}
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function displayUrl() {
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return $this->remoteImage;
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}
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}
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class FeedMunger
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{
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/**
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* @param XML_Feed_Parser $feed
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*/
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function __construct($feed, $url=null)
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{
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$this->feed = $feed;
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$this->url = $url;
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}
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function ostatusProfile()
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{
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$profile = new Ostatus_profile();
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$profile->feeduri = $this->url;
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$profile->homeuri = $this->feed->link;
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$profile->huburi = $this->getHubLink();
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$salmon = $this->getSalmonLink();
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if ($salmon) {
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$profile->salmonuri = $salmon;
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}
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return $profile;
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}
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function getAtomLink($item, $attribs=array())
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{
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// XML_Feed_Parser gets confused by multiple <link> elements.
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$dom = $item->model;
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// Note that RSS feeds would embed an <atom:link> so this should work for both.
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/// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
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// <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
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$links = $dom->getElementsByTagNameNS('http://www.w3.org/2005/Atom', 'link');
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for ($i = 0; $i < $links->length; $i++) {
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$node = $links->item($i);
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if ($node->hasAttributes()) {
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$href = $node->attributes->getNamedItem('href');
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if ($href) {
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$matches = 0;
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foreach ($attribs as $name => $val) {
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$attrib = $node->attributes->getNamedItem($name);
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if ($attrib && $attrib->value == $val) {
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$matches++;
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}
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}
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if ($matches == count($attribs)) {
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return $href->value;
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}
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}
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}
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}
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return false;
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}
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function getRssLink($item)
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{
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// XML_Feed_Parser gets confused by multiple <link> elements.
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$dom = $item->model;
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// Note that RSS feeds would embed an <atom:link> so this should work for both.
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/// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
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// <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
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$links = $dom->getElementsByTagName('link');
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for ($i = 0; $i < $links->length; $i++) {
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$node = $links->item($i);
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if (!$node->hasAttributes()) {
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return $node->textContent;
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}
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}
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return false;
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}
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function getAltLink($item)
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{
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// Check for an atom link...
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$link = $this->getAtomLink($item, array('rel' => 'alternate', 'type' => 'text/html'));
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if (!$link) {
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$link = $this->getRssLink($item);
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}
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return $link;
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}
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function getHubLink()
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{
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return $this->getAtomLink($this->feed, array('rel' => 'hub'));
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}
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function getSalmonLink()
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{
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return $this->getAtomLink($this->feed, array('rel' => 'salmon'));
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}
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function getSelfLink()
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{
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return $this->getAtomLink($this->feed, array('rel' => 'self'));
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}
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/**
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* Get an appropriate avatar image source URL, if available.
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* @return mixed string or false
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*/
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function getAvatar()
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{
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$logo = $this->feed->logo;
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if ($logo) {
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return $logo;
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}
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$icon = $this->feed->icon;
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if ($icon) {
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return $icon;
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}
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return common_path('plugins/OStatus/images/48px-Feed-icon.svg.png');
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}
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function profile($preview=false)
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{
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if ($preview) {
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$profile = new FeedSubPreviewProfile();
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} else {
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$profile = new Profile();
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}
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// @todo validate/normalize nick?
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$profile->nickname = $this->feed->title;
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$profile->fullname = $this->feed->title;
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$profile->homepage = $this->getAltLink($this->feed);
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$profile->bio = $this->feed->description;
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$profile->profileurl = $this->getAltLink($this->feed);
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if ($preview) {
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$profile->avatar = $this->getAvatar();
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}
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// @todo tags from categories
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// @todo lat/lon/location?
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return $profile;
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}
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function notice($index=1, $preview=false)
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{
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$entry = $this->feed->getEntryByOffset($index);
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if (!$entry) {
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return null;
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}
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if ($preview) {
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$notice = new FeedSubPreviewNotice($this->profile(true));
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$notice->id = -1;
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} else {
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$notice = new Notice();
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$notice->profile_id = $this->profileIdForEntry($index);
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}
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$link = $this->getAltLink($entry);
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if (empty($link)) {
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if (preg_match('!^https?://!', $entry->id)) {
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$link = $entry->id;
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common_log(LOG_DEBUG, "No link on entry, using URL from id: $link");
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}
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}
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$notice->uri = $link;
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$notice->url = $link;
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$notice->content = $this->noticeFromEntry($entry);
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$notice->rendered = common_render_content($notice->content, $notice); // @fixme this is failing on group posts
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$notice->created = common_sql_date($entry->updated); // @fixme
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$notice->is_local = Notice::GATEWAY;
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$notice->source = 'feed';
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$location = $this->getLocation($entry);
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if ($location) {
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if ($location->location_id) {
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$notice->location_ns = $location->location_ns;
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$notice->location_id = $location->location_id;
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}
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$notice->lat = $location->lat;
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$notice->lon = $location->lon;
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}
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return $notice;
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}
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function profileIdForEntry($index=1)
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{
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// hack hack hack
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// should get profile for this entry's author...
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$feeduri = $this->getSelfLink();
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$remote = Ostatus_profile::staticGet('feeduri', $feeduri);
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if ($remote) {
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return $remote->profile_id;
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} else {
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throw new Exception("Can't find feed profile for $feeduri");
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}
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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 $entry
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* @return mixed Location or false
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*/
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function getLocation($entry)
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{
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$dom = $entry->model;
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$points = $dom->getElementsByTagNameNS('http://www.georss.org/georss', 'point');
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for ($i = 0; $i < $points->length; $i++) {
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$point = $points->item(0)->textContent;
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$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 $lon from georss");
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return Location::fromLatLon($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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}
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return false;
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}
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/**
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* @param XML_Feed_Type $entry
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* @return string notice text, within post size limit
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*/
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function noticeFromEntry($entry)
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{
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$max = Notice::maxContent();
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$ellipsis = "\xe2\x80\xa6"; // U+2026 HORIZONTAL ELLIPSIS
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$title = $entry->title;
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$link = $entry->link;
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// @todo We can get <category> entries like this:
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// $cats = $entry->getCategory('category', array(0, true));
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// but it feels like an awful hack. If it's accessible cleanly,
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// try adding #hashtags from the categories/tags on a post.
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$title = $entry->title;
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$link = $this->getAltLink($entry);
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if ($link) {
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// Blog post or such...
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// @todo Should we force a language here?
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$format = _m('New post: "%1$s" %2$s');
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$out = sprintf($format, $title, $link);
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// Trim link if needed...
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if (mb_strlen($out) > $max) {
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$link = common_shorten_url($link);
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$out = sprintf($format, $title, $link);
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}
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// Trim title if needed...
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if (mb_strlen($out) > $max) {
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$used = mb_strlen($out) - mb_strlen($title);
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$available = $max - $used - mb_strlen($ellipsis);
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$title = mb_substr($title, 0, $available) . $ellipsis;
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$out = sprintf($format, $title, $link);
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}
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} else {
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// No link? Consider a bare status update.
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if (mb_strlen($title) > $max) {
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$available = $max - mb_strlen($ellipsis);
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$out = mb_substr($title, 0, $available) . $ellipsis;
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} else {
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$out = $title;
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}
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}
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return $out;
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}
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}
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