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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* 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/>.
*/
/**
* @package FeedSubPlugin
* @maintainer Brion Vibber <brion@status.net>
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
class FeedSubPreviewNotice extends Notice
{
protected $fetched = true;
function __construct($profile)
{
//parent::__construct(); // uhhh?
$this->profile = $profile;
}
function getProfile()
{
return $this->profile;
}
function find()
{
return true;
}
function fetch()
{
$got = $this->fetched;
$this->fetched = false;
return $got;
}
}
class FeedSubPreviewProfile extends Profile
{
function getAvatar($width, $height=null)
{
return new FeedSubPreviewAvatar($width, $height);
}
}
class FeedSubPreviewAvatar extends Avatar
{
function displayUrl() {
return common_path('plugins/FeedSub/images/48px-Feed-icon.svg.png');
}
}
class FeedMunger
{
/**
* @param XML_Feed_Parser $feed
*/
function __construct($feed, $url=null)
{
$this->feed = $feed;
$this->url = $url;
}
function feedinfo()
{
$feedinfo = new Feedinfo();
$feedinfo->feeduri = $this->url;
$feedinfo->homeuri = $this->feed->link;
$feedinfo->huburi = $this->getHubLink();
return $feedinfo;
}
function getAtomLink($item, $attribs=array())
{
// XML_Feed_Parser gets confused by multiple <link> elements.
$dom = $item->model;
// Note that RSS feeds would embed an <atom:link> so this should work for both.
/// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
// <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
$links = $dom->getElementsByTagNameNS('http://www.w3.org/2005/Atom', 'link');
for ($i = 0; $i < $links->length; $i++) {
$node = $links->item($i);
if ($node->hasAttributes()) {
$href = $node->attributes->getNamedItem('href');
if ($href) {
$matches = 0;
foreach ($attribs as $name => $val) {
$attrib = $node->attributes->getNamedItem($name);
if ($attrib && $attrib->value == $val) {
$matches++;
}
}
if ($matches == count($attribs)) {
return $href->value;
}
}
}
}
return false;
}
function getRssLink($item)
{
// XML_Feed_Parser gets confused by multiple <link> elements.
$dom = $item->model;
// Note that RSS feeds would embed an <atom:link> so this should work for both.
/// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
// <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
$links = $dom->getElementsByTagName('link');
for ($i = 0; $i < $links->length; $i++) {
$node = $links->item($i);
if (!$node->hasAttributes()) {
return $node->textContent;
}
}
return false;
}
function getAltLink($item)
{
// Check for an atom link...
$link = $this->getAtomLink($item, array('rel' => 'alternate', 'type' => 'text/html'));
if (!$link) {
$link = $this->getRssLink($item);
}
return $link;
}
function getHubLink()
{
return $this->getAtomLink($this->feed, array('rel' => 'hub'));
}
function profile($preview=false)
{
if ($preview) {
$profile = new FeedSubPreviewProfile();
} else {
$profile = new Profile();
}
// @todo validate/normalize nick?
$profile->nickname = $this->feed->title;
$profile->fullname = $this->feed->title;
$profile->homepage = $this->getAltLink($this->feed);
$profile->bio = $this->feed->description;
$profile->profileurl = $this->getAltLink($this->feed);
// @todo tags from categories
// @todo lat/lon/location?
return $profile;
}
function notice($index=1, $preview=false)
{
$entry = $this->feed->getEntryByOffset($index);
if (!$entry) {
return null;
}
if ($preview) {
$notice = new FeedSubPreviewNotice($this->profile(true));
$notice->id = -1;
} else {
$notice = new Notice();
}
$link = $this->getAltLink($entry);
$notice->uri = $link;
$notice->url = $link;
$notice->content = $this->noticeFromEntry($entry);
$notice->rendered = common_render_content($notice->content, $notice);
$notice->created = common_sql_date($entry->updated); // @fixme
$notice->is_local = Notice::GATEWAY;
$notice->source = 'feed';
return $notice;
}
/**
* @param XML_Feed_Type $entry
* @return string notice text, within post size limit
*/
function noticeFromEntry($entry)
{
$title = $entry->title;
$link = $entry->link;
// @todo We can get <category> entries like this:
// $cats = $entry->getCategory('category', array(0, true));
// but it feels like an awful hack. If it's accessible cleanly,
// try adding #hashtags from the categories/tags on a post.
// @todo Should we force a language here?
$format = dgettext("FeedSubPlugin", 'New post: "%1$s" %2$s');
$title = $entry->title;
$link = $this->getAltLink($entry);
$out = sprintf($format, $title, $link);
// Trim link if needed...
$max = Notice::maxContent();
if (mb_strlen($out) > $max) {
$link = common_shorten_url($link);
$out = sprintf($format, $title, $link);
}
// Trim title if needed...
if (mb_strlen($out) > $max) {
$ellipsis = "\xe2\x80\xa6"; // U+2026 HORIZONTAL ELLIPSIS
$used = mb_strlen($out) - mb_strlen($title);
$available = $max - $used - mb_strlen($ellipsis);
$title = mb_substr($title, 0, $available) . $ellipsis;
$out = sprintf($format, $title, $link);
}
return $out;
}
}
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