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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Public tag cloud for 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 StatusNet
* @author Mike Cochrane <mikec@mikenz.geek.nz>
* @author Evan Prodromou <evan@status.net>
* @copyright 2008 Mike Cochrane
* @copyright 2008-2009 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') && !defined('LACONICA')) { exit(1); }
define('TAGS_PER_PAGE', 100);
/**
* Public tag cloud for notices
*
* @category Personal
* @package StatusNet
* @author Mike Cochrane <mikec@mikenz.geek.nz>
* @author Evan Prodromou <evan@status.net>
* @copyright 2008 Mike Cochrane
* @copyright 2008-2009 StatusNet, Inc.
* @link http://status.net/
*/
class PublictagcloudAction extends Action
{
function isReadOnly($args)
{
return true;
}
function title()
{
return _('Public tag cloud');
}
function showPageNotice()
{
$this->element('p', 'instructions',
sprintf(_('These are most popular recent tags on %s '),
common_config('site', 'name')));
}
function showEmptyList()
{
$message = _('No one has posted a notice with a [hashtag](%%doc.tags%%) yet.') . ' ';
if (common_logged_in()) {
$message .= _('Be the first to post one!');
}
else {
$message .= _('Why not [register an account](%%action.register%%) and be the first to post one!');
}
$this->elementStart('div', 'guide');
$this->raw(common_markup_to_html($message));
$this->elementEnd('div');
}
function showLocalNav()
{
$nav = new PublicGroupNav($this);
$nav->show();
}
function handle($args)
{
parent::handle($args);
$this->showPage();
}
function showContent()
{
# This should probably be cached rather than recalculated
$tags = new Notice_tag();
#Need to clear the selection and then only re-add the field
#we are grouping by, otherwise it's not a valid 'group by'
#even though MySQL seems to let it slide...
$tags->selectAdd();
$tags->selectAdd('tag');
#Add the aggregated columns...
$tags->selectAdd('max(notice_id) as last_notice_id');
$calc = common_sql_weight('created', common_config('tag', 'dropoff'));
$cutoff = sprintf("notice_tag.created > '%s'",
common_sql_date(time() - common_config('tag', 'cutoff')));
$tags->selectAdd($calc . ' as weight');
$tags->whereAdd($cutoff);
$tags->groupBy('tag');
$tags->orderBy('weight DESC');
$tags->limit(TAGS_PER_PAGE);
$cnt = $tags->find();
if ($cnt > 0) {
$this->elementStart('div', array('id' => 'tagcloud',
'class' => 'section'));
$tw = array();
$sum = 0;
while ($tags->fetch()) {
$tw[$tags->tag] = $tags->weight;
$sum += $tags->weight;
}
ksort($tw);
$this->elementStart('dl');
$this->element('dt', null, _('Tag cloud'));
$this->elementStart('dd');
$this->elementStart('ul', 'tags xoxo tag-cloud');
foreach ($tw as $tag => $weight) {
if ($sum) {
$weightedSum = $weight/$sum;
} else {
$weightedSum = 0.5;
}
$this->showTag($tag, $weight, $weightedSum);
}
$this->elementEnd('ul');
$this->elementEnd('dd');
$this->elementEnd('dl');
$this->elementEnd('div');
} else {
$this->showEmptyList();
}
}
function showTag($tag, $weight, $relative)
{
if ($relative > 0.1) {
$rel = 'tag-cloud-7';
} else if ($relative > 0.05) {
$rel = 'tag-cloud-6';
} else if ($relative > 0.02) {
$rel = 'tag-cloud-5';
} else if ($relative > 0.01) {
$rel = 'tag-cloud-4';
} else if ($relative > 0.005) {
$rel = 'tag-cloud-3';
} else if ($relative > 0.002) {
$rel = 'tag-cloud-2';
} else {
$rel = 'tag-cloud-1';
}
$this->elementStart('li', $rel);
$this->element('a', array('href' => common_local_url('tag', array('tag' => $tag))),
$tag);
$this->elementEnd('li');
}
}
|
