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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Wire; |
| 6 | |
| 7 | use Celema\Wire\Exception\WireException; |
| 8 | use Override; |
| 9 | use Psr\Container\ContainerInterface as Container; |
| 10 | use ReflectionClass; |
| 11 | use Throwable; |
| 12 | |
| 13 | /** @psalm-api */ |
| 14 | class Creator implements CreatorInterface |
| 15 | { |
| 16 | use ResolvesAbstractFunctions; |
| 17 | |
| 18 | /** @var array<class-string, ReflectionClass> */ |
| 19 | private static array $reflectionCache = []; |
| 20 | |
| 21 | public function __construct( |
| 22 | protected readonly ?Container $container = null, |
| 23 | ) {} |
| 24 | |
| 25 | /** @param class-string $class */ |
| 26 | #[Override] |
| 27 | public function create( |
| 28 | string $class, |
| 29 | array $predefinedArgs = [], |
| 30 | array $predefinedTypes = [], |
| 31 | ?callable $injectCallback = null, |
| 32 | string $constructor = '', |
| 33 | ): object { |
| 34 | if ($constructor !== '') { |
| 35 | // Factory method: wrap reflection lookup, let invocation bubble |
| 36 | try { |
| 37 | $rmethod = self::getReflectionClass($class)->getMethod($constructor); |
| 38 | } catch (Throwable $e) { |
| 39 | throw new WireException( |
| 40 | 'Unresolvable: ' . $class . '::' . $constructor . ' - ' . $e->getMessage(), |
| 41 | previous: $e, |
| 42 | ); |
| 43 | } |
| 44 | |
| 45 | $args = $this->resolveArgs( |
| 46 | $rmethod, |
| 47 | predefinedArgs: $predefinedArgs, |
| 48 | predefinedTypes: $predefinedTypes, |
| 49 | injectCallback: $injectCallback, |
| 50 | ); |
| 51 | $instance = $rmethod->invoke(null, ...$args); |
| 52 | assert(is_object($instance), 'Factory methods must return an object'); |
| 53 | } else { |
| 54 | $instance = $this->resolveConstructor( |
| 55 | $class, |
| 56 | $predefinedArgs, |
| 57 | $predefinedTypes, |
| 58 | $injectCallback, |
| 59 | ); |
| 60 | } |
| 61 | |
| 62 | return $this->applyCallAttributes($instance, $predefinedTypes, $injectCallback); |
| 63 | } |
| 64 | |
| 65 | #[Override] |
| 66 | public function resolve( |
| 67 | string $id, |
| 68 | array $predefinedTypes = [], |
| 69 | ?callable $injectCallback = null, |
| 70 | ): object { |
| 71 | if (!$this->container?->has($id)) { |
| 72 | if (!class_exists($id)) { |
| 73 | throw new WireException('Unresolvable: ' . $id . ' is neither a container entry nor a class'); |
| 74 | } |
| 75 | |
| 76 | return $this->create($id, predefinedTypes: $predefinedTypes, injectCallback: $injectCallback); |
| 77 | } |
| 78 | |
| 79 | // The container owns the entry's lifetime and configuration, including |
| 80 | // its calls, so the result is returned as is. |
| 81 | /** @psalm-suppress MixedAssignment */ |
| 82 | $instance = $this->container->get($id); |
| 83 | |
| 84 | if (!is_object($instance)) { |
| 85 | throw new WireException('Unresolvable: container entry ' . $id . ' is not an object'); |
| 86 | } |
| 87 | |
| 88 | return $instance; |
| 89 | } |
| 90 | |
| 91 | /** @param class-string $class */ |
| 92 | protected function resolveConstructor( |
| 93 | string $class, |
| 94 | array $predefinedArgs, |
| 95 | array $predefinedTypes, |
| 96 | ?callable $injectCallback, |
| 97 | ): object { |
| 98 | try { |
| 99 | $rcls = self::getReflectionClass($class); |
| 100 | } catch (Throwable $e) { |
| 101 | throw new WireException( |
| 102 | 'Unresolvable: ' . $class . ' - ' . $e->getMessage(), |
| 103 | previous: $e, |
| 104 | ); |
| 105 | } |
| 106 | |
| 107 | if (!$rcls->isInstantiable()) { |
| 108 | throw new WireException('Unresolvable: ' . $class . ' cannot be instantiated'); |
| 109 | } |
| 110 | |
| 111 | $args = new ConstructorResolver($this)->resolve( |
| 112 | $rcls, |
| 113 | predefinedArgs: $predefinedArgs, |
| 114 | predefinedTypes: $predefinedTypes, |
| 115 | injectCallback: $injectCallback, |
| 116 | ); |
| 117 | |
| 118 | return $rcls->newInstance(...$args); |
| 119 | } |
| 120 | |
| 121 | protected function applyCallAttributes( |
| 122 | object $instance, |
| 123 | array $predefinedTypes = [], |
| 124 | ?callable $injectCallback = null, |
| 125 | ): object { |
| 126 | $callAttrs = self::getReflectionClass($instance::class)->getAttributes(Call::class); |
| 127 | |
| 128 | // See if the attribute itself has one or more Call attributes. If so, |
| 129 | // resolve/autowire the arguments of the method it states and call it. |
| 130 | foreach ($callAttrs as $callAttr) { |
| 131 | $callAttr = $callAttr->newInstance(); |
| 132 | $methodToResolve = $callAttr->method; |
| 133 | |
| 134 | /** @var callable $callable */ |
| 135 | $callable = [$instance, $methodToResolve]; |
| 136 | $args = new CallableResolver($this)->resolve( |
| 137 | $callable, |
| 138 | predefinedArgs: $callAttr->args, |
| 139 | predefinedTypes: $predefinedTypes, |
| 140 | injectCallback: $injectCallback, |
| 141 | ); |
| 142 | $callable(...$args); |
| 143 | } |
| 144 | |
| 145 | return $instance; |
| 146 | } |
| 147 | |
| 148 | /** @param class-string $class */ |
| 149 | private static function getReflectionClass(string $class): ReflectionClass |
| 150 | { |
| 151 | return self::$reflectionCache[$class] ??= new ReflectionClass($class); |
| 152 | } |
| 153 | |
| 154 | #[Override] |
| 155 | public function container(): ?Container |
| 156 | { |
| 157 | return $this->container; |
| 158 | } |
| 159 | |
| 160 | #[Override] |
| 161 | public function creator(): CreatorInterface |
| 162 | { |
| 163 | return $this; |
| 164 | } |
| 165 | } |