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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of php-fast-forward/event-dispatcher. |
| 7 | * |
| 8 | * This source file is subject to the license bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 2025-2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 12 | * @license https://opensource.org/licenses/MIT MIT License |
| 13 | * |
| 14 | * @see https://github.com/php-fast-forward/event-dispatcher |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\EventDispatcher\ServiceProvider\Configuration; |
| 20 | |
| 21 | use ReflectionException; |
| 22 | use Closure; |
| 23 | use FastForward\Config\ConfigInterface; |
| 24 | use FastForward\EventDispatcher\Exception\RuntimeException; |
| 25 | use Psr\EventDispatcher\ListenerProviderInterface; |
| 26 | use ReflectionClass; |
| 27 | use ReflectionFunction; |
| 28 | use ReflectionFunctionAbstract; |
| 29 | use ReflectionMethod; |
| 30 | use Symfony\Component\EventDispatcher\Attribute\AsEventListener; |
| 31 | use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
| 32 | |
| 33 | /** |
| 34 | * Classify configured listeners by the provider strategy they require. |
| 35 | * |
| 36 | * @internal |
| 37 | */ |
| 38 | class ConfiguredListenerProviderCollection |
| 39 | { |
| 40 | /** |
| 41 | * Listener providers declared directly in configuration. |
| 42 | * |
| 43 | * @var list<ListenerProviderInterface|string> |
| 44 | */ |
| 45 | private array $listenerProviders = []; |
| 46 | |
| 47 | /** |
| 48 | * Event subscribers declared in configuration. |
| 49 | * |
| 50 | * @var list<EventSubscriberInterface|string> |
| 51 | */ |
| 52 | private array $eventSubscribers = []; |
| 53 | |
| 54 | /** |
| 55 | * Callables that should be registered with the reflection-based provider. |
| 56 | * |
| 57 | * @var list<ConfiguredReflectionListener> |
| 58 | */ |
| 59 | private array $reflectionListeners = []; |
| 60 | |
| 61 | /** |
| 62 | * Attribute-based listeners that carry an explicit priority. |
| 63 | * |
| 64 | * @var list<ConfiguredPrioritizedListener> |
| 65 | */ |
| 66 | private array $prioritizedListeners = []; |
| 67 | |
| 68 | /** |
| 69 | * Build the configured listener collections from application configuration. |
| 70 | * |
| 71 | * @param string|ConfigInterface $config configuration source or container key |
| 72 | * |
| 73 | * @throws RuntimeException thrown when a configured listener cannot be classified |
| 74 | * @throws ReflectionException thrown when reflective listener inspection fails |
| 75 | */ |
| 76 | public function __construct(string|ConfigInterface $config) |
| 77 | { |
| 78 | if (\is_string($config) || ! $config->has(ListenerProviderInterface::class)) { |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | $listeners = $config->get(ListenerProviderInterface::class); |
| 83 | |
| 84 | foreach ($listeners as $listener) { |
| 85 | $attributes = $this->getReflectionAttributes($listener); |
| 86 | |
| 87 | if ([] !== $attributes) { |
| 88 | foreach ($attributes as $attribute) { |
| 89 | $this->prioritizedListeners[] = new ConfiguredPrioritizedListener( |
| 90 | $listener, |
| 91 | $attribute->event, |
| 92 | $attribute->method, |
| 93 | $attribute->priority, |
| 94 | ); |
| 95 | } |
| 96 | |
| 97 | continue; |
| 98 | } |
| 99 | |
| 100 | if (is_subclass_of($listener, ListenerProviderInterface::class)) { |
| 101 | $this->listenerProviders[] = $listener; |
| 102 | |
| 103 | continue; |
| 104 | } |
| 105 | |
| 106 | if (is_subclass_of($listener, EventSubscriberInterface::class)) { |
| 107 | $this->eventSubscribers[] = $listener; |
| 108 | |
| 109 | continue; |
| 110 | } |
| 111 | |
| 112 | if (\is_string($listener) || \is_callable($listener)) { |
| 113 | $this->reflectionListeners[] = new ConfiguredReflectionListener( |
| 114 | $listener, |
| 115 | $this->getCallableEventType($listener), |
| 116 | ); |
| 117 | |
| 118 | continue; |
| 119 | } |
| 120 | |
| 121 | throw RuntimeException::forUnsupportedType($listener); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Return configured listener providers. |
| 127 | * |
| 128 | * @return list<ListenerProviderInterface|string> |
| 129 | */ |
| 130 | public function listenerProviders(): array |
| 131 | { |
| 132 | return $this->listenerProviders; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Return configured event subscribers. |
| 137 | * |
| 138 | * @return list<EventSubscriberInterface|string> |
| 139 | */ |
| 140 | public function eventSubscribers(): array |
| 141 | { |
| 142 | return $this->eventSubscribers; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Return configured reflection-based listeners. |
| 147 | * |
| 148 | * @return list<ConfiguredReflectionListener> |
| 149 | */ |
| 150 | public function reflectionListeners(): array |
| 151 | { |
| 152 | return $this->reflectionListeners; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Return configured prioritized listeners. |
| 157 | * |
| 158 | * @return list<ConfiguredPrioritizedListener> |
| 159 | */ |
| 160 | public function prioritizedListeners(): array |
| 161 | { |
| 162 | return $this->prioritizedListeners; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Resolve listener attributes declared through {@see AsEventListener}. |
| 167 | * |
| 168 | * @param mixed $listener listener value to inspect |
| 169 | * |
| 170 | * @return list<AsEventListener> attribute instances resolved from the listener |
| 171 | * |
| 172 | * @throws RuntimeException thrown when an attribute target cannot resolve its event type |
| 173 | * @throws ReflectionException thrown when reflective lookup fails |
| 174 | */ |
| 175 | private function getReflectionAttributes(mixed $listener): array |
| 176 | { |
| 177 | if (! \is_object($listener) && (! \is_string($listener) || ! class_exists($listener))) { |
| 178 | return []; |
| 179 | } |
| 180 | |
| 181 | $reflection = new ReflectionClass($listener); |
| 182 | $attributes = []; |
| 183 | |
| 184 | foreach ($reflection->getAttributes(AsEventListener::class) as $attribute) { |
| 185 | $instance = $attribute->newInstance(); |
| 186 | $instance->method ??= '__invoke'; |
| 187 | $instance->event ??= $this->getReflectionEventType($reflection->getMethod($instance->method)); |
| 188 | $attributes[] = $instance; |
| 189 | } |
| 190 | |
| 191 | foreach ($reflection->getMethods(ReflectionMethod::IS_PUBLIC) as $method) { |
| 192 | foreach ($method->getAttributes(AsEventListener::class) as $attribute) { |
| 193 | $instance = $attribute->newInstance(); |
| 194 | $instance->method ??= $method->getName(); |
| 195 | $instance->event ??= $this->getReflectionEventType($method); |
| 196 | $attributes[] = $instance; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | return $attributes; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Resolve the event type handled by an attributed listener method. |
| 205 | * |
| 206 | * @param ReflectionMethod $method reflected listener method |
| 207 | * |
| 208 | * @return string event type declared by the first method parameter |
| 209 | * |
| 210 | * @throws RuntimeException thrown when the method does not expose a typed first parameter |
| 211 | */ |
| 212 | private function getReflectionEventType(ReflectionMethod $method): string |
| 213 | { |
| 214 | $parameters = $method->getParameters(); |
| 215 | if ([] === $parameters) { |
| 216 | throw RuntimeException::forMethodWithoutParameters(); |
| 217 | } |
| 218 | |
| 219 | $parameter = $parameters[0]; |
| 220 | |
| 221 | if (! $parameter->hasType()) { |
| 222 | throw RuntimeException::forMethodParameterWithoutType(); |
| 223 | } |
| 224 | |
| 225 | return $parameter->getType() |
| 226 | ->getName(); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Resolve the event type handled by a callable listener. |
| 231 | * |
| 232 | * @param mixed $listener listener value to inspect |
| 233 | * |
| 234 | * @return string event type declared by the first callable parameter |
| 235 | * |
| 236 | * @throws RuntimeException thrown when the callable does not expose a typed first parameter |
| 237 | * @throws ReflectionException thrown when reflective lookup fails |
| 238 | */ |
| 239 | private function getCallableEventType(mixed $listener): string |
| 240 | { |
| 241 | $parameters = $this->getCallableReflector($listener) |
| 242 | ->getParameters(); |
| 243 | |
| 244 | if ([] === $parameters) { |
| 245 | throw RuntimeException::forListenerWithoutParameters(); |
| 246 | } |
| 247 | |
| 248 | $parameter = $parameters[0]; |
| 249 | |
| 250 | if (! $parameter->hasType()) { |
| 251 | throw RuntimeException::forListenerParameterWithoutType(); |
| 252 | } |
| 253 | |
| 254 | return $parameter->getType() |
| 255 | ->getName(); |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * Create a reflector for the provided callable listener value. |
| 260 | * |
| 261 | * @param mixed $listener listener value to reflect |
| 262 | * |
| 263 | * @return ReflectionFunctionAbstract reflection object for the callable |
| 264 | * |
| 265 | * @throws RuntimeException thrown when the listener cannot be reflected as a callable |
| 266 | * @throws ReflectionException thrown when reflective lookup fails |
| 267 | */ |
| 268 | private function getCallableReflector(mixed $listener): ReflectionFunctionAbstract |
| 269 | { |
| 270 | if ($listener instanceof Closure) { |
| 271 | return new ReflectionFunction($listener); |
| 272 | } |
| 273 | |
| 274 | if (\is_string($listener) && str_contains($listener, '::')) { |
| 275 | [$class, $method] = explode('::', $listener, 2); |
| 276 | |
| 277 | return new ReflectionMethod($class, $method); |
| 278 | } |
| 279 | |
| 280 | if (\is_array($listener) && isset($listener[0], $listener[1])) { |
| 281 | return new ReflectionMethod($listener[0], $listener[1]); |
| 282 | } |
| 283 | |
| 284 | if (\is_object($listener)) { |
| 285 | return new ReflectionMethod($listener, '__invoke'); |
| 286 | } |
| 287 | |
| 288 | if (\is_string($listener) && \function_exists($listener)) { |
| 289 | return new ReflectionFunction($listener); |
| 290 | } |
| 291 | |
| 292 | if (\is_string($listener) && class_exists($listener)) { |
| 293 | return new ReflectionMethod($listener, '__invoke'); |
| 294 | } |
| 295 | |
| 296 | throw RuntimeException::forUnsupportedType($listener); |
| 297 | } |
| 298 | } |