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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, 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/>.
*/
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 $creators = array();
function handle($args) {
parent::handle($args);
$limit = (int) $this->trimmed('limit');
if ($limit == 0) {
$limit = DEFAULT_RSS_LIMIT;
}
$this->show_rss($limit);
}
function init() {
return true;
}
function get_notices() {
return array();
}
function get_channel() {
return array('url' => '',
'title' => '',
'link' => '',
'description' => '');
}
function get_image() {
return NULL;
}
function show_rss($limit=0) {
if (!$this->init()) {
return;
}
$notices = $this->get_notices($limit);
$this->init_rss();
$this->show_channel($notices);
$this->show_image();
foreach ($notices as $n) {
$this->show_item($n);
}
$this->show_creators();
$this->end_rss();
}
function show_channel($notices) {
$channel = $this->get_channel();
$image = $this->get_image();
common_element_start('channel', array('rdf:about' => $channel['url']));
common_element('title', NULL, $channel['title']);
common_element('link', NULL, $channel['link']);
common_element('description', NULL, $channel['description']);
common_element('cc:licence', array('rdf:resource' => common_config('license','url')));
if ($image) {
common_element('image', array('rdf:resource' => $image));
}
common_element_start('items');
common_element_start('rdf:Seq');
foreach ($notices as $notice) {
common_element('sioct:MicroblogPost', array('rdf:resource' => $notice->uri));
}
common_element_end('rdf:Seq');
common_element_end('items');
common_element_end('channel');
}
function show_image() {
$image = $this->get_image();
if ($image) {
$channel = $this->get_channel();
common_element_start('image', array('rdf:about' => $image));
common_element('title', NULL, $channel['title']);
common_element('link', NULL, $channel['link']);
common_element('url', NULL, $image);
common_element_end('image');
}
}
function show_item($notice) {
$profile = Profile::staticGet($notice->profile_id);
$nurl = common_local_url('shownotice', array('notice' => $notice->id));
$user = User::staticGet($profile->id);
if ($user) {
$creator_url = $user->uri;
} else {
$creator_url = $profile->profile_url;
}
common_element_start('item', array('rdf:about' => $notice->uri));
$title = $profile->nickname . ': ' . $notice->content;
common_element('title', NULL, $title);
common_element('link', NULL, $nurl);
common_element('description', NULL, $profile->nickname."'s status on ".common_exact_date($notice->created));
common_element('dc:date', NULL, common_date_w3dtf($notice->created));
common_element('dc:creator', NULL, ($profile->fullname) ? $profile->fullname : $profile->nickname);
common_element('sioc:has_creator', array('rdf:resource' => $creator_url));
common_element('cc:licence', array('rdf:resource' => common_config('license', 'url')));
common_element_end('item');
$this->creators[$creator_url] = $profile;
}
function show_creators() {
foreach ($this->creators as $uri => $profile) {
$id = $profile->id;
$nickname = $profile->nickname;
common_element_start('sioc:User', array('rdf:about' => $uri));
common_element('foaf:nick', NULL, $nickname);
if ($profile->fullname) {
common_element('foaf:name', NULL, $profile->fullname);
}
common_element('sioc:id', NULL, $id);
$avatar = common_profile_avatar_url($profile);
common_element('sioc:avatar', array('rdf:resource' => $avatar));
common_element_end('sioc:User');
}
}
function init_rss() {
$channel = $this->get_channel();
header('Content-Type: application/rdf+xml');
common_start_xml();
common_element_start('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:foaf' =>
'http://xmlns.com/foaf/0.1/',
'xmlns:sioc' =>
'http://rdfs.org/sioc/ns#',
'xmlns:sioct' =>
'http://rdfs.org/sioc/types#',
'xmlns' => 'http://purl.org/rss/1.0/'));
common_element_start('sioc:Site', array('rdf:about' =>
'http://identi.ca/'));
common_element('sioc:name', NULL, common_config('site', 'name'));
common_element_start('sioc:container_of');
common_element('sioc:Container', array('rdf:about' =>
$channel['url']));
common_element_end('sioc:container_of');
common_element_end('sioc:Site');
}
function end_rss() {
common_element_end('rdf:RDF');
}
}
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