<?php /** * Laconica, the distributed open-source microblogging tool * * Base class for RSS 1.0 feed actions * * PHP version 5 * * 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 Mail * @package Laconica * @author Evan Prodromou <evan@controlyourself.ca> * @author Earle Martin <earle@downlode.org> * @copyright 2008-9 Control Yourself, Inc. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 * @link http://laconi.ca/ */ if (!defined('LACONICA')) { exit(1); } define('DEFAULT_RSS_LIMIT', 48); class Rss10Action extends Action { # This will contain the details of each feed item's author and be used to generate SIOC data. var $creators = array(); var $limit = DEFAULT_RSS_LIMIT; var $notices = null; /** * Constructor * * Just wraps the Action constructor. * * @param string $output URI to output to, default = stdout * @param boolean $indent Whether to indent output, default true * * @see Action::__construct */ function __construct($output='php://output', $indent=true) { parent::__construct($output, $indent); } /** * Do we need to write to the database? * * @return boolean true */ function isReadonly() { return true; } /** * Read arguments and initialize members * * @param array $args Arguments from $_REQUEST * @return boolean success */ function prepare($args) { parent::prepare($args); $this->limit = (int) $this->trimmed('limit'); if ($this->limit == 0) { $this->limit = DEFAULT_RSS_LIMIT; } return true; } /** * Handle a request * * @param array $args Arguments from $_REQUEST * * @return void */ function handle($args) { // Parent handling, including cache check parent::handle($args); // Get the list of notices if (empty($this->tag)) { $this->notices = $this->getNotices($this->limit); } else { $this->notices = $this->getTaggedNotices($this->tag, $this->limit); } $this->showRss(); } /** * Get the notices to output in this stream * * @return array an array of Notice objects sorted in reverse chron */ function getNotices() { return array(); } /** * Get a description of the channel * * Returns an array with the following * @return array */ function getChannel() { return array('url' => '', 'title' => '', 'link' => '', 'description' => ''); } function getImage() { return null; } function showRss() { $this->initRss(); $this->showChannel(); $this->showImage(); foreach ($this->notices as $n) { $this->showItem($n); } $this->showCreators(); $this->endRss(); } function showChannel() { $channel = $this->getChannel(); $image = $this->getImage(); $this->elementStart('channel', array('rdf:about' => $channel['url'])); $this->element('title', null, $channel['title']); $this->element('link', null, $channel['link']); $this->element('description', null, $channel['description']); $this->element('cc:licence', array('rdf:resource' => common_config('license','url'))); if ($image) { $this->element('image', array('rdf:resource' => $image)); } $this->elementStart('items'); $this->elementStart('rdf:Seq'); foreach ($this->notices as $notice) { $this->element('sioct:MicroblogPost', array('rdf:resource' => $notice->uri)); } $this->elementEnd('rdf:Seq'); $this->elementEnd('items'); $this->elementEnd('channel'); } function showImage() { $image = $this->getImage(); if ($image) { $channel = $this->getChannel(); $this->elementStart('image', array('rdf:about' => $image)); $this->element('title', null, $channel['title']); $this->element('link', null, $channel['link']); $this->element('url', null, $image); $this->elementEnd('image'); } } function showItem($notice) { $profile = Profile::staticGet($notice->profile_id); $nurl = common_local_url('shownotice', array('notice' => $notice->id)); $creator_uri = common_profile_uri($profile); $this->elementStart('item', array('rdf:about' => $notice->uri)); $title = $profile->nickname . ': ' . common_xml_safe_str(trim($notice->content)); $this->element('title', null, $title); $this->element('link', null, $nurl); $this->element('description', null, $profile->nickname."'s status on ".common_exact_date($notice->created)); $this->element('dc:date', null, common_date_w3dtf($notice->created)); $this->element('dc:creator', null, ($profile->fullname) ? $profile->fullname : $profile->nickname); $this->element('sioc:has_creator', array('rdf:resource' => $creator_uri)); $this->element('laconica:postIcon', array('rdf:resource' => $profile->avatarUrl())); $this->element('cc:licence', array('rdf:resource' => common_config('license', 'url'))); $this->elementEnd('item'); $this->creators[$creator_uri] = $profile; } function showCreators() { foreach ($this->creators as $uri => $profile) { $id = $profile->id; $nickname = $profile->nickname; $this->elementStart('sioc:User', array('rdf:about' => $uri)); $this->element('foaf:nick', null, $nickname); if ($profile->fullname) { $this->element('foaf:name', null, $profile->fullname); } $this->element('sioc:id', null, $id); $avatar = $profile->avatarUrl(); $this->element('sioc:avatar', array('rdf:resource' => $avatar)); $this->elementEnd('sioc:User'); } } function initRss() { $channel = $this->getChannel(); header('Content-Type: application/rdf+xml'); $this->startXml(); $this->elementStart('rdf:RDF', array('xmlns:rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'xmlns:dc' => 'http://purl.org/dc/elements/1.1/', 'xmlns:cc' => 'http://web.resource.org/cc/', 'xmlns:content' => 'http://purl.org/rss/1.0/modules/content/', 'xmlns:foaf' => 'http://xmlns.com/foaf/0.1/', 'xmlns:sioc' => 'http://rdfs.org/sioc/ns#', 'xmlns:sioct' => 'http://rdfs.org/sioc/types#', 'xmlns:laconica' => 'http://laconi.ca/ont/', 'xmlns' => 'http://purl.org/rss/1.0/')); $this->elementStart('sioc:Site', array('rdf:about' => common_root_url())); $this->element('sioc:name', null, common_config('site', 'name')); $this->elementStart('sioc:container_of'); $this->element('sioc:Container', array('rdf:about' => $channel['url'])); $this->elementEnd('sioc:container_of'); $this->elementEnd('sioc:Site'); } function endRss() { $this->elementEnd('rdf:RDF'); } /** * When was this page last modified? * */ function lastModified() { if (empty($this->notices)) { return null; } if (count($this->notices) == 0) { return null; } // FIXME: doesn't handle modified profiles, avatars, deleted notices return strtotime($this->notices[0]->created); } }