Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/*
* @file src/Content/Widget/TagCloud.php
*/
namespace Friendica\Content\Widget;
use Friendica\Core\L10n;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\Model\Item;
/**
* TagCloud widget
*
* @author Rabuzarus
*/
class TagCloud
{
/**
* Construct a tag/term cloud block for an user.
*
* @brief Construct a tag/term cloud block for an user.
* @param int $uid The user ID.
* @param int $count Max number of displayed tags/terms.
* @param int $owner_id The contact ID of the owner of the tagged items.
* @param string $flags Special item flags.
* @param int $type The tag/term type.
*
* @return string HTML formatted output.
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function getHTML($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HASHTAG)
{
$o = '';
$r = self::tagadelic($uid, $count, $owner_id, $flags, $type);
if (count($r)) {
$contact = DBA::selectFirst('contact', ['url'], ['uid' => $uid, 'self' => true]);
$url = System::removedBaseUrl($contact['url']);
foreach ($r as $rr) {
$tag['level'] = $rr[2];
$tag['url'] = $url . '?tag=' . urlencode($rr[0]);
$tag['name'] = $rr[0];
$tags[] = $tag;
}
$tpl = Renderer::getMarkupTemplate('tagblock_widget.tpl');
$o = Renderer::replaceMacros($tpl, [
'$title' => L10n::t('Tags'),
'$tags' => $tags
]);
}
return $o;
}
/**
* Get alphabetical sorted array of used tags/terms of an user including
* a weighting by frequency of use.
*
* @brief Get alphabetical sorted array of used tags/terms of an user including
* a weighting by frequency of use.
* @param int $uid The user ID.
* @param int $count Max number of displayed tags/terms.
* @param int $owner_id The contact id of the owner of the tagged items.
* @param string $flags Special item flags.
* @param int $type The tag/term type.
*
* @return array Alphabetical sorted array of used tags of an user.
* @throws \Exception
*/
private static function tagadelic($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HASHTAG)
{
$sql_options = Item::getPermissionsSQLByUserId($uid);
$limit = $count ? sprintf('LIMIT %d', intval($count)) : '';
if ($flags) {
if ($flags === 'wall') {
$sql_options .= ' AND `item`.`wall` ';
}
}
if ($owner_id) {
$sql_options .= ' AND `item`.`owner-id` = ' . intval($owner_id) . ' ';
}
// Fetch tags
$r = DBA::p("SELECT `term`, COUNT(`term`) AS `total` FROM `term`
LEFT JOIN `item` ON `term`.`oid` = `item`.`id`
WHERE `term`.`uid` = ? AND `term`.`type` = ?
AND `term`.`otype` = ?
AND `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
$sql_options
GROUP BY `term` ORDER BY `total` DESC $limit",
$uid,
$type,
TERM_OBJ_POST
);
if (!DBA::isResult($r)) {
return [];
}
return self::tagCalc($r);
}
/**
* Calculate weighting of tags according to the frequency of use.
*
* @brief Calculate weighting of tags according to the frequency of use.
* @param array $arr Array of tags/terms with tag/term name and total count of use.
* @return array Alphabetical sorted array of used tags/terms of an user.
*/
private static function tagCalc(array $arr)
{
$tags = [];
$min = 1e9;
$max = -1e9;
$x = 0;
if (!$arr) {
return [];
}
foreach ($arr as $rr) {
$tags[$x][0] = $rr['term'];
$tags[$x][1] = log($rr['total']);
$tags[$x][2] = 0;
$min = min($min, $tags[$x][1]);
$max = max($max, $tags[$x][1]);
$x ++;
}
usort($tags, 'self::tagsSort');
$range = max(.01, $max - $min) * 1.0001;
for ($x = 0; $x < count($tags); $x ++) {
$tags[$x][2] = 1 + floor(9 * ($tags[$x][1] - $min) / $range);
}
return $tags;
}
/**
* Compare function to sort tags/terms alphabetically.
*
* @brief Compare function to sort tags/terms alphabetically.
* @param string $a
* @param string $b
*
* @return int
*/
private static function tagsSort($a, $b)
{
if (strtolower($a[0]) == strtolower($b[0])) {
return 0;
}
return ((strtolower($a[0]) < strtolower($b[0])) ? -1 : 1);
}
}