3 * Laconica - a distributed open-source microblogging tool
4 * Copyright (C) 2008, Controlez-Vous, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 if (!defined('LACONICA')) { exit(1); }
22 require_once(INSTALLDIR.'/actions/showstream.php');
23 define('TAGS_PER_PAGE', 100);
25 class TagAction extends StreamAction {
27 function handle($args) {
29 parent::handle($args);
31 # Looks like we're good; show the header
33 if (isset($args['tag']) && $args['tag']) {
35 common_show_header(sprintf(_("Notices tagged with %s"), $tag),
36 array($this, 'show_header'), $tag,
37 array($this, 'show_top'));
38 $this->show_notices($tag);
40 common_show_header(_("Tags"),
41 array($this, 'show_header'), '',
42 array($this, 'show_top'));
49 function show_header($tag = false) {
51 common_element('link', array('rel' => 'alternate',
52 'href' => common_local_url('tagrss', array('tag' => $tag)),
53 'type' => 'application/rss+xml',
54 'title' => sprintf(_('Feed for tag %s'), $tag)));
58 function get_instructions() {
59 return _('Showing most popular tags from the last week');
62 function show_top($tag = false) {
64 $instr = $this->get_instructions();
65 $output = common_markup_to_html($instr);
66 common_element_start('div', 'instructions');
68 common_element_end('div');
69 $this->public_views_menu();
72 $this->show_feeds_list(array(0=>array('href'=>common_local_url('tagrss', array('tag' => $tag)),
74 'version' => 'RSS 1.0',
75 'item' => 'tagrss')));
81 # This should probably be cached rather than recalculated
82 $tags = DB_DataObject::factory('Notice_tag');
84 #Need to clear the selection and then only re-add the field
85 #we are grouping by, otherwise it's not a valid 'group by'
86 #even though MySQL seems to let it slide...
88 $tags->selectAdd('tag');
90 #Add the aggregated columns...
91 $tags->selectAdd('max(notice_id) as last_notice_id');
92 if(common_config('db','type')=='pgsql') {
93 $calc='sum(exp(-extract(epoch from (now()-created))/%s)) as weight';
95 $calc='sum(exp(-(now() - created)/%s)) as weight';
97 $tags->selectAdd(sprintf($calc, common_config('tag', 'dropoff')));
98 $tags->groupBy('tag');
99 $tags->orderBy('weight DESC');
101 # $tags->whereAdd('created > "' . strftime('%Y-%m-%d %H:%M:%S', strtotime('-1 MONTH')) . '"');
103 $tags->limit(TAGS_PER_PAGE);
105 $cnt = $tags->find();
108 common_element_start('p', 'tagcloud');
112 while ($tags->fetch()) {
113 $tw[$tags->tag] = $tags->weight;
114 $sum += $tags->weight;
119 foreach ($tw as $tag => $weight) {
120 $this->show_tag($tag, $weight, $weight/$sum);
123 common_element_end('p');
127 function show_tag($tag, $weight, $relative) {
129 # XXX: these should probably tune to the size of the site
130 if ($relative > 0.1) {
132 } else if ($relative > 0.05) {
134 } else if ($relative > 0.02) {
136 } else if ($relative > 0.01) {
138 } else if ($relative > 0.005) {
140 } else if ($relative > 0.002) {
146 common_element('a', array('class' => "$cls weight-$weight relative-$relative",
147 'href' => common_local_url('tag', array('tag' => $tag))),
152 function show_notices($tag) {
156 $page = ($this->arg('page')) ? ($this->arg('page')+0) : 1;
158 $notice = Notice_tag::getStream($tag, (($page-1)*NOTICES_PER_PAGE), NOTICES_PER_PAGE + 1);
160 $cnt = $this->show_notice_list($notice);
162 common_pagination($page > 1, $cnt > NOTICES_PER_PAGE,
163 $page, 'tag', array('tag' => $tag));