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RegisterEnvVarProcessorsPass.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\Argument\ServiceClosureArgument;
15 use Symfony\Component\DependencyInjection\ContainerBuilder;
16 use Symfony\Component\DependencyInjection\EnvVarProcessor;
17 use Symfony\Component\DependencyInjection\EnvVarProcessorInterface;
18 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
19 use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
20 use Symfony\Component\DependencyInjection\Reference;
21 use Symfony\Component\DependencyInjection\ServiceLocator;
22
23 /**
24 * Creates the container.env_var_processors_locator service.
25 *
26 * @author Nicolas Grekas <p@tchwork.com>
27 */
28 class RegisterEnvVarProcessorsPass implements CompilerPassInterface
29 {
30 private static $allowedTypes = ['array', 'bool', 'float', 'int', 'string'];
31
32 public function process(ContainerBuilder $container)
33 {
34 $bag = $container->getParameterBag();
35 $types = [];
36 $processors = [];
37 foreach ($container->findTaggedServiceIds('container.env_var_processor') as $id => $tags) {
38 if (!$r = $container->getReflectionClass($class = $container->getDefinition($id)->getClass())) {
39 throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
40 } elseif (!$r->isSubclassOf(EnvVarProcessorInterface::class)) {
41 throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, EnvVarProcessorInterface::class));
42 }
43 foreach ($class::getProvidedTypes() as $prefix => $type) {
44 $processors[$prefix] = new ServiceClosureArgument(new Reference($id));
45 $types[$prefix] = self::validateProvidedTypes($type, $class);
46 }
47 }
48
49 if ($bag instanceof EnvPlaceholderParameterBag) {
50 foreach (EnvVarProcessor::getProvidedTypes() as $prefix => $type) {
51 if (!isset($types[$prefix])) {
52 $types[$prefix] = self::validateProvidedTypes($type, EnvVarProcessor::class);
53 }
54 }
55 $bag->setProvidedTypes($types);
56 }
57
58 if ($processors) {
59 $container->register('container.env_var_processors_locator', ServiceLocator::class)
60 ->setPublic(true)
61 ->setArguments([$processors])
62 ;
63 }
64 }
65
66 private static function validateProvidedTypes($types, $class)
67 {
68 $types = explode('|', $types);
69
70 foreach ($types as $type) {
71 if (!\in_array($type, self::$allowedTypes)) {
72 throw new InvalidArgumentException(sprintf('Invalid type "%s" returned by "%s::getProvidedTypes()", expected one of "%s".', $type, $class, implode('", "', self::$allowedTypes)));
73 }
74 }
75
76 return $types;
77 }
78 }
79