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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\HttpKernel\Controller;
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13
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14 use Symfony\Component\HttpFoundation\Request;
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15 use Symfony\Component\HttpKernel\Controller\ArgumentResolver\DefaultValueResolver;
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16 use Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestAttributeValueResolver;
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17 use Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestValueResolver;
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18 use Symfony\Component\HttpKernel\Controller\ArgumentResolver\SessionValueResolver;
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19 use Symfony\Component\HttpKernel\Controller\ArgumentResolver\VariadicValueResolver;
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20 use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactory;
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21 use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactoryInterface;
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22
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23 /**
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24 * Responsible for resolving the arguments passed to an action.
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25 *
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26 * @author Iltar van der Berg <kjarli@gmail.com>
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27 */
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28 final class ArgumentResolver implements ArgumentResolverInterface
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29 {
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30 private $argumentMetadataFactory;
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31
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32 /**
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33 * @var iterable|ArgumentValueResolverInterface[]
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34 */
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35 private $argumentValueResolvers;
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36
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37 public function __construct(ArgumentMetadataFactoryInterface $argumentMetadataFactory = null, $argumentValueResolvers = [])
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38 {
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39 $this->argumentMetadataFactory = $argumentMetadataFactory ?: new ArgumentMetadataFactory();
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40 $this->argumentValueResolvers = $argumentValueResolvers ?: self::getDefaultArgumentValueResolvers();
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41 }
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42
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43 /**
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44 * {@inheritdoc}
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45 */
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46 public function getArguments(Request $request, $controller)
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47 {
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48 $arguments = [];
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49
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50 foreach ($this->argumentMetadataFactory->createArgumentMetadata($controller) as $metadata) {
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51 foreach ($this->argumentValueResolvers as $resolver) {
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52 if (!$resolver->supports($request, $metadata)) {
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53 continue;
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54 }
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55
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56 $resolved = $resolver->resolve($request, $metadata);
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57
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58 if (!$resolved instanceof \Generator) {
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59 throw new \InvalidArgumentException(sprintf('%s::resolve() must yield at least one value.', \get_class($resolver)));
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60 }
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61
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62 foreach ($resolved as $append) {
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63 $arguments[] = $append;
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64 }
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65
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66 // continue to the next controller argument
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67 continue 2;
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68 }
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69
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70 $representative = $controller;
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71
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72 if (\is_array($representative)) {
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73 $representative = sprintf('%s::%s()', \get_class($representative[0]), $representative[1]);
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74 } elseif (\is_object($representative)) {
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75 $representative = \get_class($representative);
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76 }
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77
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78 throw new \RuntimeException(sprintf('Controller "%s" requires that you provide a value for the "$%s" argument. Either the argument is nullable and no null value has been provided, no default value has been provided or because there is a non optional argument after this one.', $representative, $metadata->getName()));
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79 }
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80
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81 return $arguments;
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82 }
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83
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84 public static function getDefaultArgumentValueResolvers()
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85 {
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86 return [
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87 new RequestAttributeValueResolver(),
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88 new RequestValueResolver(),
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89 new SessionValueResolver(),
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90 new DefaultValueResolver(),
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91 new VariadicValueResolver(),
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92 ];
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93 }
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94 }
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