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A tag cloud section for groups

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Evan Prodromou 2009-01-22 21:14:01 +00:00
parent a6fd4eb0a3
commit 7cd275b982
1 changed files with 87 additions and 0 deletions
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lib/grouptagcloudsection.php Normal file
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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Personal tag cloud section
*
* 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 Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 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);
}
/**
* Personal tag cloud section
*
* @category Widget
* @package Laconica
* @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 GroupTagCloudSection extends TagCloudSection
{
var $group = null;
function __construct($out=null, $group=null)
{
parent::__construct($out);
$this->group = $group;
}
function title()
{
return sprintf(_('Tags in %s group\'s notices'), $this->group->nickname);
}
function getTags()
{
$qry = 'SELECT notice_tag.tag, '.
'sum(exp(-(now() - notice_tag.created)/%s)) as weight ' .
'FROM notice_tag JOIN notice ' .
'ON notice_tag.notice_id = notice.id ' .
'JOIN group_inbox on group_inbox.notice_id = notice.id ' .
'WHERE group_inbox.group_id = %d ' .
'GROUP BY notice_tag.tag ' .
'ORDER BY weight DESC ';
$limit = TAGS_PER_SECTION;
$offset = 0;
if (common_config('db','type') == 'pgsql') {
$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
} else {
$qry .= ' LIMIT ' . $offset . ', ' . $limit;
}
$tag = Memcached_DataObject::cachedQuery('Notice_tag',
sprintf($qry,
common_config('tag', 'dropoff'),
$this->group->id),
3600);
return $tag;
}
}