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<?php
declare(strict_types=1);
namespace Shaarli\Front\Controller;
use Slim\Http\Request;
use Slim\Http\Response;
/**
* Class TagController
*
* Slim controller handle tags.
*
* @package Front\Controller
*/
class TagController extends ShaarliController
{
/**
* Add another tag in the current search through an HTTP redirection.
*
* @param array $args Should contain `newTag` key as tag to add to current search
*/
public function addTag(Request $request, Response $response, array $args): Response
{
$newTag = $args['newTag'] ?? null;
$referer = $this->container->environment['HTTP_REFERER'] ?? null;
// In case browser does not send HTTP_REFERER, we search a single tag
if (null === $referer) {
if (null !== $newTag) {
return $response->withRedirect('./?searchtags='. urlencode($newTag));
}
return $response->withRedirect('./');
}
$currentUrl = parse_url($this->container->environment['HTTP_REFERER']);
parse_str($currentUrl['query'] ?? '', $params);
if (null === $newTag) {
return $response->withRedirect(($currentUrl['path'] ?? './') .'?'. http_build_query($params));
}
// Prevent redirection loop
if (isset($params['addtag'])) {
unset($params['addtag']);
}
// Check if this tag is already in the search query and ignore it if it is.
// Each tag is always separated by a space
$currentTags = isset($params['searchtags']) ? explode(' ', $params['searchtags']) : [];
$addtag = true;
foreach ($currentTags as $value) {
if ($value === $newTag) {
$addtag = false;
break;
}
}
// Append the tag if necessary
if (true === $addtag) {
$currentTags[] = trim($newTag);
}
$params['searchtags'] = trim(implode(' ', $currentTags));
// We also remove page (keeping the same page has no sense, since the results are different)
unset($params['page']);
return $response->withRedirect(($currentUrl['path'] ?? './') .'?'. http_build_query($params));
}
}
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