forked from GNUsocial/gnu-social
94 lines
2.9 KiB
PHP
94 lines
2.9 KiB
PHP
<?php
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/**
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* Laconica, the distributed open-source microblogging tool
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*
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* Personal tag cloud section
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Widget
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* @package Laconica
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* @author Evan Prodromou <evan@controlyourself.ca>
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* @copyright 2009 Control Yourself, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://laconi.ca/
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*/
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if (!defined('LACONICA')) {
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exit(1);
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}
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/**
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* Personal tag cloud section
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*
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* @category Widget
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* @package Laconica
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* @author Evan Prodromou <evan@controlyourself.ca>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://laconi.ca/
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*/
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class GroupTagCloudSection extends TagCloudSection
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{
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var $group = null;
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function __construct($out=null, $group=null)
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{
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parent::__construct($out);
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$this->group = $group;
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}
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function title()
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{
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return sprintf(_('Tags in %s group\'s notices'), $this->group->nickname);
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}
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function getTags()
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{
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if (common_config('db', 'type') == 'pgsql') {
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$weightexpr='sum(exp(-extract(epoch from (now() - notice_tag.created)) / %s))';
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} else {
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$weightexpr='sum(exp(-(now() - notice_tag.created) / %s))';
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}
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$qry = 'SELECT notice_tag.tag, '.
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$weightexpr . ' as weight ' .
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'FROM notice_tag JOIN notice ' .
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'ON notice_tag.notice_id = notice.id ' .
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'JOIN group_inbox on group_inbox.notice_id = notice.id ' .
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'WHERE group_inbox.group_id = %d ' .
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'GROUP BY notice_tag.tag ' .
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'ORDER BY weight DESC ';
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$limit = TAGS_PER_SECTION;
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$offset = 0;
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if (common_config('db','type') == 'pgsql') {
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$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
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} else {
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$qry .= ' LIMIT ' . $offset . ', ' . $limit;
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}
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$tag = Memcached_DataObject::cachedQuery('Notice_tag',
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sprintf($qry,
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common_config('tag', 'dropoff'),
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$this->group->id),
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3600);
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return $tag;
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}
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}
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