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<?php |
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/** |
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* This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony) |
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* |
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* Copyright (C) 2019 Jan Böhmer (https://github.com/jbtronics) |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (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 General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
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* |
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*/ |
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namespace App\Services; |
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use App\Entity\Parts\Part; |
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use Doctrine\ORM\EntityManagerInterface; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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/** |
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* A service related for searching for tags. Mostly useful for autocomplete reasons. |
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* @package App\Services |
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*/ |
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class TagFinder |
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{ |
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protected $em; |
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public function __construct(EntityManagerInterface $entityManager) |
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{ |
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$this->em = $entityManager; |
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} |
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protected function configureOptions(OptionsResolver $resolver) |
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{ |
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$resolver->setDefaults([ |
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'query_limit' => 75, |
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'return_limit' => 25, |
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'min_keyword_length' => 3 |
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]); |
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} |
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/** |
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* Search tags that begins with the certain keyword. |
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* @param string $keyword The keyword the tag must begin with |
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* @param array $options Some options specifying the search behavior. See configureOptions for possible options. |
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* @return string[] An array containing the tags that match the given keyword. |
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*/ |
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public function searchTags(string $keyword, array $options = []) |
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{ |
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$results = []; |
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$keyword_regex = '/^' . preg_quote($keyword, '/') . '/'; |
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$resolver = new OptionsResolver(); |
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$this->configureOptions($resolver); |
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$options = $resolver->resolve($options); |
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//If the keyword is too short we will get to much results, which takes too much time... |
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if (mb_strlen($keyword) < $options['min_keyword_length']) { |
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return []; |
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} |
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//Build a query to get all |
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$qb = $this->em->createQueryBuilder(); |
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$qb->select('p.tags') |
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->from(Part::class, 'p') |
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->where("p.tags LIKE ?1") |
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->setMaxResults($options['query_limit']) |
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//->orderBy('RAND()') |
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->setParameter(1, '%' . $keyword . '%'); |
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$possible_tags = $qb->getQuery()->getArrayResult(); |
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//Iterate over each possible tags (which are comma separated) and extract tags which match our keyword |
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foreach ($possible_tags as $tags) { |
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$tags = explode(',', $tags['tags']); |
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$results = array_merge($results, preg_grep($keyword_regex, $tags)); |
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} |
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$results = array_unique($results); |
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//Limit the returned tag count to specified value. |
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return array_slice($results, 0, $options['return_limit']); |
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} |
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} |
Part-DB /
Part-DB-symfony
