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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* List of popular notices
*
* 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 Public
* @package Laconica
* @author Zach Copley <zach@controlyourself.ca>
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2008-2009 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);
}
require_once INSTALLDIR.'/lib/publicgroupnav.php';
require_once INSTALLDIR.'/lib/noticelist.php';
/**
* List of popular notices
*
* We provide a list of the most popular notices. Popularity
* is measured by
*
* @category Personal
* @package Laconica
* @author Zach Copley <zach@controlyourself.ca>
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class FavoritedAction extends Action
{
var $page = null;
/**
* Title of the page
*
* @return string Title of the page
*/
function title()
{
if ($this->page == 1) {
return _('Popular notices');
} else {
return sprintf(_('Popular notices, page %d'), $this->page);
}
}
/**
* Instructions for use
*
* @return instructions for use
*/
function getInstructions()
{
return _('The most popular notices on the site right now.');
}
/**
* Is this page read-only?
*
* @return boolean true
*/
function isReadOnly()
{
return true;
}
/**
* Take arguments for running
*
* @param array $args $_REQUEST args
*
* @return boolean success flag
*
* @todo move queries from showContent() to here
*/
function prepare($args)
{
parent::prepare($args);
$this->page = ($this->arg('page')) ? ($this->arg('page')+0) : 1;
common_set_returnto($this->selfUrl());
return true;
}
/**
* Handle request
*
* Shows a page with list of favorite notices
*
* @param array $args $_REQUEST args; handled in prepare()
*
* @return void
*/
function handle($args)
{
parent::handle($args);
$this->showPage();
}
/**
* Show the page notice
*
* Shows instructions for the page
*
* @return void
*/
function showPageNotice()
{
$instr = $this->getInstructions();
$output = common_markup_to_html($instr);
$this->elementStart('div', 'instructions');
$this->raw($output);
$this->elementEnd('div');
}
function showEmptyList()
{
$message = _('Favorite notices appear on this page but no one has favorited one yet.') . ' ';
if (common_logged_in()) {
$message .= _('Be the first to add a notice to your favorites by clicking the fave button next to any notice you like.');
}
else {
$message .= _('Why not [register an account](%%action.register%%) and be the first to add a notice to your favorites!');
}
$this->elementStart('div', 'guide');
$this->raw(common_markup_to_html($message));
$this->elementEnd('div');
}
/**
* Local navigation
*
* This page is part of the public group, so show that.
*
* @return void
*/
function showLocalNav()
{
$nav = new PublicGroupNav($this);
$nav->show();
}
/**
* Content area
*
* Shows the list of popular notices
*
* @return void
*/
function showContent()
{
if (common_config('db', 'type') == 'pgsql') {
$weightexpr='sum(exp(-extract(epoch from (now() - fave.modified)) / %s))';
} else {
$weightexpr='sum(exp(-(now() - fave.modified) / %s))';
}
$qry = 'SELECT notice.*, '.
$weightexpr . ' as weight ' .
'FROM notice JOIN fave ON notice.id = fave.notice_id ' .
'GROUP BY id,profile_id,uri,content,rendered,url,created,notice.modified,reply_to,is_local,source ' .
'ORDER BY weight DESC';
$offset = ($this->page - 1) * NOTICES_PER_PAGE;
$limit = NOTICES_PER_PAGE + 1;
if (common_config('db', 'type') == 'pgsql') {
$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
} else {
$qry .= ' LIMIT ' . $offset . ', ' . $limit;
}
$notice = Memcached_DataObject::cachedQuery('Notice',
sprintf($qry, common_config('popular', 'dropoff')),
600);
$nl = new NoticeList($notice, $this);
$cnt = $nl->show();
if ($cnt == 0) {
$this->showEmptyList();
}
$this->pagination($this->page > 1, $cnt > NOTICES_PER_PAGE,
$this->page, 'favorited');
}
/**
* Output document relationship links
*
* @return void
*/
function showRelationshipLinks()
{
$this->sequenceRelationships($this->page > 1, $this->count > NOTICES_PER_PAGE, // FIXME
$this->page, 'favorited');
}
}
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