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<?php declare (strict_types=1); namespace Rector\DeadCode\Rector\Array_; use PhpParser\Node; use PhpParser\Node\Expr\Array_; use PhpParser\Node\Expr\ArrayItem; use Rector\Core\Contract\PhpParser\NodePrinterInterface; use Rector\Core\Rector\AbstractRector; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @changelog https://3v4l.org/SG0Wu * @see \Rector\Tests\DeadCode\Rector\Array_\RemoveDuplicatedArrayKeyRector\RemoveDuplicatedArrayKeyRectorTest */ final class RemoveDuplicatedArrayKeyRector extends AbstractRector { /** * @readonly * @var \Rector\Core\Contract\PhpParser\NodePrinterInterface */ private $nodePrinter; public function __construct(NodePrinterInterface $nodePrinter) { $this->nodePrinter = $nodePrinter; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Remove duplicated key in defined arrays.', [new CodeSample(<<<'CODE_SAMPLE' $item = [ 1 => 'A', 1 => 'B' ]; CODE_SAMPLE , <<<'CODE_SAMPLE' $item = [ 1 => 'B' ]; CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [Array_::class]; } /** * @param Array_ $node */ public function refactor(Node $node) : ?Node { $arrayItemsWithDuplicatedKey = $this->getArrayItemsWithDuplicatedKey($node); if ($arrayItemsWithDuplicatedKey === []) { return null; } foreach ($arrayItemsWithDuplicatedKey as $arrayItemWithDuplicatedKey) { // keep last item \array_pop($arrayItemWithDuplicatedKey); $this->nodeRemover->removeNodes($arrayItemWithDuplicatedKey); } return $node; } /** * @return ArrayItem[][] */ private function getArrayItemsWithDuplicatedKey(Array_ $array) : array { $arrayItemsByKeys = []; foreach ($array->items as $arrayItem) { if (!$arrayItem instanceof ArrayItem) { continue; } if ($arrayItem->key === null) { continue; } $keyValue = $this->nodePrinter->print($arrayItem->key); $arrayItemsByKeys[$keyValue][] = $arrayItem; } return $this->filterItemsWithSameKey($arrayItemsByKeys); } /** * @param ArrayItem[][] $arrayItemsByKeys * @return ArrayItem[][] */ private function filterItemsWithSameKey(array $arrayItemsByKeys) : array { /** @var ArrayItem[][] $arrayItemsByKeys */ $arrayItemsByKeys = \array_filter($arrayItemsByKeys, static function (array $arrayItems) : bool { return \count($arrayItems) > 1; }); return \array_filter($arrayItemsByKeys, static function (array $arrayItems) : bool { return \count($arrayItems) > 1; }); } }
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