gnu-social/actions/apitimelinetag.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Show the latest notices for a given tag
*
* 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 API
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
require_once INSTALLDIR.'/lib/twitterapi.php';
/**
* Returns the 20 most recent notices tagged by a given tag
*
* @category API
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
class ApiTimelineTagAction extends TwitterapiAction
{
var $notices = null;
/**
* Take arguments for running
*
* @param array $args $_REQUEST args
*
* @return boolean success flag
*
*/
function prepare($args)
{
parent::prepare($args);
$this->page = (int)$this->arg('page', 1);
$this->count = (int)$this->arg('count', 20);
$this->tag = $this->arg('tag');
$this->format = $this->arg('format');
$this->notices = $this->getNotices();
return true;
}
/**
* Handle the request
*
* Just show the notices
*
* @param array $args $_REQUEST data (unused)
*
* @return void
*/
function handle($args)
{
parent::handle($args);
$this->showTimeline();
}
/**
* Show the timeline of notices
*
* @return void
*/
function showTimeline()
{
$sitename = common_config('site', 'name');
$title = sprintf(_("Notices tagged with %s"), $this->tag);
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$link = common_local_url(
'tag',
array('tag' => $this->tag)
);
$subtitle = sprintf(
_('Updates tagged with %1$s on %2$s!'),
$this->tag,
$sitename
);
$taguribase = common_config('integration', 'taguri');
$id = "tag:$taguribase:TagTimeline:".$tag;
switch($this->format) {
case 'xml':
$this->show_xml_timeline($this->notices);
break;
case 'rss':
$this->show_rss_timeline($this->notices, $title, $link, $subtitle);
break;
case 'atom':
$selfuri = common_root_url() .
'api/statusnet/tags/timeline/' .
$this->tag . '.atom';
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$this->show_atom_timeline(
$this->notices,
$title,
$id,
$link,
$subtitle,
null,
$selfuri
);
break;
case 'json':
$this->show_json_timeline($this->notices);
break;
default:
$this->clientError(_('API method not found!'), $code = 404);
break;
}
}
/**
* Get notices
*
* @return array notices
*/
function getNotices()
{
$notices = array();
$notice = Notice_tag::getStream(
$this->tag,
($this->page - 1) * $this->count,
$this->count + 1
);
while ($notice->fetch()) {
$notices[] = clone($notice);
}
return $notices;
}
/**
* Is this action read only?
*
* @param array $args other arguments
*
* @return boolean true
*/
function isReadOnly($args)
{
return true;
}
/**
* When was this feed last modified?
*
* @return string datestamp of the latest notice in the stream
*/
function lastModified()
{
if (!empty($this->notices) && (count($this->notices) > 0)) {
return strtotime($this->notices[0]->created);
}
return null;
}
/**
* An entity tag for this stream
*
* Returns an Etag based on the action name, language, and
* timestamps of the first and last notice in the timeline
*
* @return string etag
*/
function etag()
{
if (!empty($this->notices) && (count($this->notices) > 0)) {
$last = count($this->notices) - 1;
return '"' . implode(
':',
array($this->arg('action'),
common_language(),
$this->tag,
strtotime($this->notices[0]->created),
strtotime($this->notices[$last]->created))
)
. '"';
}
return null;
}
}