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PriorityTaggedServiceTrait.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\DependencyInjection\Compiler;
13
14 use Symfony\Component\DependencyInjection\ContainerBuilder;
15 use Symfony\Component\DependencyInjection\Reference;
16
17 /**
18 * Trait that allows a generic method to find and sort service by priority option in the tag.
19 *
20 * @author Iltar van der Berg <kjarli@gmail.com>
21 */
22 trait PriorityTaggedServiceTrait
23 {
24 /**
25 * Finds all services with the given tag name and order them by their priority.
26 *
27 * The order of additions must be respected for services having the same priority,
28 * and knowing that the \SplPriorityQueue class does not respect the FIFO method,
29 * we should not use that class.
30 *
31 * @see https://bugs.php.net/53710
32 * @see https://bugs.php.net/60926
33 *
34 * @param string $tagName
35 *
36 * @return Reference[]
37 */
38 private function findAndSortTaggedServices($tagName, ContainerBuilder $container)
39 {
40 $services = [];
41
42 foreach ($container->findTaggedServiceIds($tagName, true) as $serviceId => $attributes) {
43 $priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
44 $services[$priority][] = new Reference($serviceId);
45 }
46
47 if ($services) {
48 krsort($services);
49 $services = \call_user_func_array('array_merge', $services);
50 }
51
52 return $services;
53 }
54 }
55