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<?php declare (strict_types=1); namespace Rector\Symfony\Rector\MethodCall; use PhpParser\Node; use PhpParser\Node\Arg; use PhpParser\Node\Expr; use PhpParser\Node\Expr\ClassConstFetch; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Expr\MethodCall; use PHPStan\Type\ObjectType; use Rector\Core\Rector\AbstractRector; use Rector\NodeTypeResolver\TypeAnalyzer\StringTypeAnalyzer; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see https://symfony.com/blog/new-in-symfony-4-3-simpler-event-dispatching * * @see \Rector\Symfony\Tests\Rector\MethodCall\MakeDispatchFirstArgumentEventRector\MakeDispatchFirstArgumentEventRectorTest */ final class MakeDispatchFirstArgumentEventRector extends AbstractRector { /** * @readonly * @var \Rector\NodeTypeResolver\TypeAnalyzer\StringTypeAnalyzer */ private $stringTypeAnalyzer; public function __construct(StringTypeAnalyzer $stringTypeAnalyzer) { $this->stringTypeAnalyzer = $stringTypeAnalyzer; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Make event object a first argument of dispatch() method, event name as second', [new CodeSample(<<<'CODE_SAMPLE' use Symfony\Contracts\EventDispatcher\EventDispatcherInterface; class SomeClass { public function run(EventDispatcherInterface $eventDispatcher) { $eventDispatcher->dispatch('event_name', new Event()); } } CODE_SAMPLE , <<<'CODE_SAMPLE' use Symfony\Contracts\EventDispatcher\EventDispatcherInterface; class SomeClass { public function run(EventDispatcherInterface $eventDispatcher) { $eventDispatcher->dispatch(new Event(), 'event_name'); } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [MethodCall::class]; } /** * @param MethodCall $node */ public function refactor(Node $node) : ?Node { if ($this->shouldSkip($node)) { return null; } $firstArg = $node->args[0]; if (!$firstArg instanceof Arg) { return null; } $firstArgumentValue = $firstArg->value; if ($this->stringTypeAnalyzer->isStringOrUnionStringOnlyType($firstArgumentValue)) { $this->refactorStringArgument($node); return $node; } $secondArg = $node->args[1]; if (!$secondArg instanceof Arg) { return null; } $secondArgumentValue = $secondArg->value; if ($secondArgumentValue instanceof FuncCall) { $this->refactorGetCallFuncCall($node, $secondArgumentValue, $firstArgumentValue); return $node; } return null; } private function shouldSkip(MethodCall $methodCall) : bool { if (!$this->isObjectType($methodCall->var, new ObjectType('Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface'))) { return \true; } if (!$this->isName($methodCall->name, 'dispatch')) { return \true; } return !isset($methodCall->args[1]); } private function refactorStringArgument(MethodCall $methodCall) : void { // swap arguments [$methodCall->args[0], $methodCall->args[1]] = [$methodCall->args[1], $methodCall->args[0]]; if ($this->isEventNameSameAsEventObjectClass($methodCall)) { unset($methodCall->args[1]); } } private function refactorGetCallFuncCall(MethodCall $methodCall, FuncCall $funcCall, Expr $expr) : void { if (!$this->isName($funcCall, 'get_class')) { return; } $firstArg = $funcCall->args[0]; if (!$firstArg instanceof Arg) { return; } $getClassArgumentValue = $firstArg->value; if (!$this->nodeComparator->areNodesEqual($expr, $getClassArgumentValue)) { return; } unset($methodCall->args[1]); } /** * Is the event name just `::class`? We can remove it */ private function isEventNameSameAsEventObjectClass(MethodCall $methodCall) : bool { $secondArg = $methodCall->args[1]; if (!$secondArg instanceof Arg) { return \false; } if (!$secondArg->value instanceof ClassConstFetch) { return \false; } $classConst = $this->valueResolver->getValue($secondArg->value); $firstArg = $methodCall->args[0]; if (!$firstArg instanceof Arg) { return \false; } $eventStaticType = $this->getType($firstArg->value); if (!$eventStaticType instanceof ObjectType) { return \false; } return $classConst === $eventStaticType->getClassName(); } }
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