forked from GNUsocial/gnu-social
175 lines
4.6 KiB
PHP
175 lines
4.6 KiB
PHP
<?php
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/*
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* Laconica - a distributed open-source microblogging tool
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* Copyright (C) 2008, Controlez-Vous, Inc.
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*
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* 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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if (!defined('LACONICA')) { exit(1); }
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require_once(INSTALLDIR.'/actions/showstream.php');
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define('TAGS_PER_PAGE', 100);
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define('AGE_FACTOR', 864000.0);
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class TagAction extends StreamAction {
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function handle($args) {
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parent::handle($args);
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# Looks like we're good; show the header
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if (isset($args['tag']) && $args['tag']) {
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$tag = $args['tag'];
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common_show_header(sprintf(_("Notices tagged with %s"), $tag),
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array($this, 'show_header'), $tag,
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array($this, 'show_top'));
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$this->show_notices($tag);
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} else {
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common_show_header(_("Tags"),
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array($this, 'show_header'), '',
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array($this, 'show_top'));
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$this->show_tags();
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}
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common_show_footer();
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}
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function show_header($tag = false) {
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if (false && $tag) {
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common_element('link', array('rel' => 'alternate',
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'href' => common_local_url('tagrss', array('tag' => $tag)),
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'type' => 'application/rss+xml',
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'title' => sprintf(_('Feed for tag %s'), $tag)));
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}
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}
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function get_instructions() {
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return _('Showing most popular tags from the last week');
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}
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function show_top($tag = false) {
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if (!$tag) {
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$instr = $this->get_instructions();
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$output = common_markup_to_html($instr);
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common_element_start('div', 'instructions');
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common_raw($output);
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common_element_end('div');
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}
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common_element_start('ul', array('id' => 'nav_views'));
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common_menu_item(common_local_url('tags'),
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_('Recent Tags'),
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_('Recent Tags'),
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!$tag);
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if ($tag) {
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common_menu_item(common_local_url('tag', array('tag' => $tag)),
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'#' . $tag,
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sprintf(_("Notices tagged with %s"), $tag),
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true);
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}
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common_element_end('ul');
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}
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function show_tags()
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{
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# This should probably be cached rather than recalculated
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$tags = DB_DataObject::factory('Notice_tag');
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$tags->selectAdd('max(notice_id) as last_notice_id');
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$tags->selectAdd(sprintf('sum(exp(-(now() - created)/%f)) as weight', AGE_FACTOR));
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$tags->groupBy('tag');
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$tags->orderBy('weight DESC');
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# $tags->whereAdd('created > "' . strftime('%Y-%m-%d %H:%M:%S', strtotime('-1 MONTH')) . '"');
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$tags->limit(TAGS_PER_PAGE);
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$cnt = $tags->find();
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if ($cnt > 0) {
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common_element_start('p', 'tagcloud');
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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 += $tags->weight;
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}
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foreach ($tw as $tag => $weight) {
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$this->show_tag($tag, $weight, $weight/$sum);
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}
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common_element_end('p');
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}
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}
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function show_tag($tag, $weight, $relative) {
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# XXX: these should probably tune to the size of the site
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$cls = ($relative > 0.1) ? 'largest' :
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($relative > 0.05) ? 'verylarge' :
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($relative > 0.02) ? 'large' :
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($relative > 0.01) ? 'medium' :
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($relative > 0.005) ? 'small' :
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($relative > 0.002) ? 'verysmall' :
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'smallest';
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common_element('a', array('class' => "$cls weight-$weight relative-$relative",
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'href' => common_local_url('tag', array('tag' => $tag))),
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$tag);
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common_text(' ');
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}
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function show_notices($tag) {
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$tags = DB_DataObject::factory('Notice_tag');
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$tags->tag = $tag;
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$tags->orderBy('created DESC');
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$page = ($this->arg('page')) ? ($this->arg('page')+0) : 1;
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$tags->limit((($page-1)*NOTICES_PER_PAGE), NOTICES_PER_PAGE + 1);
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$cnt = $tags->find();
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if ($cnt > 0) {
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common_element_start('ul', array('id' => 'notices'));
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for ($i = 0; $i < min($cnt, NOTICES_PER_PAGE); $i++) {
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if ($tags->fetch()) {
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$notice = new Notice();
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$notice->id = $tags->notice_id;
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$result = $notice->find(true);
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if (!$result) {
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continue;
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}
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$this->show_notice($notice);
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} else {
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// shouldn't happen!
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break;
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}
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}
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common_element_end('ul');
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}
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common_pagination($page > 1, $cnt > NOTICES_PER_PAGE,
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$page, 'tag', array('tag' => $tag));
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}
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}
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