2009-01-20 03:21:14 +09:00
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<?php
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/**
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* Laconica, the distributed open-source microblogging tool
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*
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* Public tag cloud for notices
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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 Public
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* @package Laconica
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* @author Mike Cochrane <mikec@mikenz.geek.nz>
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* @author Evan Prodromou <evan@controlyourself.ca>
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* @copyright 2008 Mike Cochrane
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* @copyright 2008-2009 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')) { exit(1); }
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define('TAGS_PER_PAGE', 100);
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/**
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* Public tag cloud for notices
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*
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* @category Personal
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* @package Laconica
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* @author Mike Cochrane <mikec@mikenz.geek.nz>
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* @author Evan Prodromou <evan@controlyourself.ca>
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* @copyright 2008 Mike Cochrane
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* @copyright 2008-2009 Control Yourself, Inc.
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* @link http://laconi.ca/
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*/
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class PublictagcloudAction extends Action
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{
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function isReadOnly()
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{
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return true;
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}
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function title()
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{
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return _('Public tag cloud');
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}
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function showPageNotice()
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{
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$this->element('p', 'instructions',
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sprintf(_('These are most popular recent tags on %s '),
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common_config('site', 'name')));
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2009-04-04 04:16:35 +09:00
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$tags = new Notice_tag();
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if ($tags->count()) {
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return;
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}
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$message = _('Noone has posted a notice with a [hashtag](%%doc.tags%%) yet.') . ' ';
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if (common_logged_in()) {
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$message .= _('Be the first to post one!');
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}
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else {
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$message .= _('Why not [register an account](%%action.register%%) and be the first to post one!');
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}
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$this->elementStart('div', 'blankfiller');
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$this->raw(common_markup_to_html($message));
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$this->elementEnd('div');
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2009-01-20 03:21:14 +09:00
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}
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function showLocalNav()
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{
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$nav = new PublicGroupNav($this);
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$nav->show();
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}
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function handle($args)
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{
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parent::handle($args);
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$this->showPage();
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}
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function showContent()
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{
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# This should probably be cached rather than recalculated
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$tags = new Notice_tag();
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#Need to clear the selection and then only re-add the field
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#we are grouping by, otherwise it's not a valid 'group by'
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#even though MySQL seems to let it slide...
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$tags->selectAdd();
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$tags->selectAdd('tag');
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#Add the aggregated columns...
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$tags->selectAdd('max(notice_id) as last_notice_id');
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if(common_config('db','type')=='pgsql') {
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$calc='sum(exp(-extract(epoch from (now()-created))/%s)) as weight';
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} else {
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$calc='sum(exp(-(now() - created)/%s)) as weight';
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}
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$tags->selectAdd(sprintf($calc, common_config('tag', 'dropoff')));
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$tags->groupBy('tag');
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$tags->orderBy('weight DESC');
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$tags->limit(TAGS_PER_PAGE);
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$cnt = $tags->find();
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if ($cnt > 0) {
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2009-01-22 03:35:45 +09:00
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$this->elementStart('div', array('id' => 'tagcloud',
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'class' => 'section'));
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2009-01-20 03:21:14 +09:00
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$tw = array();
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$sum = 0;
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while ($tags->fetch()) {
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$tw[$tags->tag] = $tags->weight;
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$sum += $tags->weight;
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}
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ksort($tw);
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2009-01-22 03:35:45 +09:00
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$this->elementStart('dl');
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$this->element('dt', null, _('Tag cloud'));
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$this->elementStart('dd');
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$this->elementStart('ul', 'tags xoxo tag-cloud');
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2009-01-20 03:21:14 +09:00
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foreach ($tw as $tag => $weight) {
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$this->showTag($tag, $weight, $weight/$sum);
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}
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2009-01-22 03:35:45 +09:00
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$this->elementEnd('ul');
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$this->elementEnd('dd');
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$this->elementEnd('dl');
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$this->elementEnd('div');
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2009-01-20 03:21:14 +09:00
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}
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}
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function showTag($tag, $weight, $relative)
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{
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if ($relative > 0.1) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-7';
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2009-01-20 03:21:14 +09:00
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} else if ($relative > 0.05) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-6';
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2009-01-20 03:21:14 +09:00
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} else if ($relative > 0.02) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-5';
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2009-01-20 03:21:14 +09:00
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} else if ($relative > 0.01) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-4';
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2009-01-20 03:21:14 +09:00
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} else if ($relative > 0.005) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-3';
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2009-01-20 03:21:14 +09:00
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} else if ($relative > 0.002) {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-2';
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2009-01-20 03:21:14 +09:00
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} else {
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2009-01-22 03:35:45 +09:00
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$rel = 'tag-cloud-1';
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2009-01-20 03:21:14 +09:00
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}
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2009-01-22 03:35:45 +09:00
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$this->elementStart('li', $rel);
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$this->element('a', array('href' => common_local_url('tag', array('tag' => $tag))),
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2009-01-20 03:21:14 +09:00
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$tag);
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2009-01-22 03:35:45 +09:00
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$this->elementEnd('li');
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2009-01-20 03:21:14 +09:00
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}
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}
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