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<?php
declare(strict_types=1);
namespace Shaarli\Front\Controller;
use Slim\Http\Request;
use Slim\Http\Response;
/**
* Class TagCloud
*
* Slim controller used to render the tag cloud page.
*
* @package Front\Controller
*/
class TagCloudController extends ShaarliController
{
public function index(Request $request, Response $response): Response
{
if ($this->container->loginManager->isLoggedIn() === true) {
$visibility = $this->container->sessionManager->getSessionParameter('visibility');
}
$searchTags = $request->getQueryParam('searchtags');
$filteringTags = $searchTags !== null ? explode(' ', $searchTags) : [];
$tags = $this->container->bookmarkService->bookmarksCountPerTag($filteringTags, $visibility ?? null);
// We sort tags alphabetically, then choose a font size according to count.
// First, find max value.
$maxCount = 0;
foreach ($tags as $count) {
$maxCount = max($maxCount, $count);
}
alphabetical_sort($tags, false, true);
$logMaxCount = $maxCount > 1 ? log($maxCount, 30) : 1;
$tagList = [];
foreach ($tags as $key => $value) {
if (in_array($key, $filteringTags)) {
continue;
}
// Tag font size scaling:
// default 15 and 30 logarithm bases affect scaling,
// 2.2 and 0.8 are arbitrary font sizes in em.
$size = log($value, 15) / $logMaxCount * 2.2 + 0.8;
$tagList[$key] = [
'count' => $value,
'size' => number_format($size, 2, '.', ''),
];
}
$searchTags = implode(' ', escape($filteringTags));
$data = [
'search_tags' => $searchTags,
'tags' => $tagList,
];
$data = $this->executeHooks($data);
foreach ($data as $key => $value) {
$this->assignView($key, $value);
}
$searchTags = !empty($searchTags) ? $searchTags .' - ' : '';
$this->assignView(
'pagetitle',
$searchTags. t('Tag cloud') .' - '. $this->container->conf->get('general.title', 'Shaarli')
);
return $response->write($this->render('tag.cloud'));
}
/**
* @param mixed[] $data Template data
*
* @return mixed[] Template data after active plugins render_picwall hook execution.
*/
protected function executeHooks(array $data): array
{
$this->container->pluginManager->executeHooks(
'render_tagcloud',
$data,
['loggedin' => $this->container->loginManager->isLoggedIn()]
);
return $data;
}
}
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