2019-10-13 05:59:52 +00:00
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<?php
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declare(strict_types=1);
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2018-10-28 16:50:10 +00:00
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namespace Rector\CodeQuality\Rector\If_;
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use PhpParser\Node;
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use PhpParser\Node\Stmt\If_;
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use PhpParser\Node\Stmt\Return_;
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2021-02-08 12:33:17 +00:00
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use Rector\Core\NodeManipulator\IfManipulator;
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2020-02-06 21:48:18 +00:00
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use Rector\Core\Rector\AbstractRector;
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2019-04-13 09:20:27 +00:00
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use Rector\NodeTypeResolver\Node\AttributeKey;
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2020-11-16 17:50:38 +00:00
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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2018-10-28 16:50:10 +00:00
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2019-09-03 09:11:45 +00:00
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/**
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2021-03-12 22:20:25 +00:00
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* @see \Rector\Tests\CodeQuality\Rector\If_\SimplifyIfNotNullReturnRector\SimplifyIfNotNullReturnRectorTest
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2019-09-03 09:11:45 +00:00
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*/
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2018-10-28 16:50:10 +00:00
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final class SimplifyIfNotNullReturnRector extends AbstractRector
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{
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2019-01-10 12:55:50 +00:00
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/**
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2019-02-27 21:54:39 +00:00
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* @var IfManipulator
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2019-01-10 12:55:50 +00:00
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*/
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2019-02-27 21:54:39 +00:00
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private $ifManipulator;
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2019-01-10 12:55:50 +00:00
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2019-02-27 21:54:39 +00:00
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public function __construct(IfManipulator $ifManipulator)
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2019-01-10 12:55:50 +00:00
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{
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2019-02-27 21:54:39 +00:00
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$this->ifManipulator = $ifManipulator;
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2019-01-10 12:55:50 +00:00
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}
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2020-11-16 17:50:38 +00:00
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public function getRuleDefinition(): RuleDefinition
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2018-10-28 16:50:10 +00:00
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{
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2020-11-16 17:50:38 +00:00
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return new RuleDefinition(
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'Changes redundant null check to instant return',
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[
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new CodeSample(
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<<<'CODE_SAMPLE'
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2018-10-28 16:50:10 +00:00
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$newNode = 'something ;
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if ($newNode !== null) {
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return $newNode;
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}
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return null;
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2020-09-15 08:23:13 +00:00
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CODE_SAMPLE
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2020-11-16 17:50:38 +00:00
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,
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<<<'CODE_SAMPLE'
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2018-10-28 16:50:10 +00:00
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$newNode = 'something ;
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return $newNode;
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2020-09-15 08:23:13 +00:00
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CODE_SAMPLE
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2021-05-06 18:51:25 +00:00
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),
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]
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);
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2018-10-28 16:50:10 +00:00
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}
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/**
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2021-02-27 00:06:15 +00:00
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* @return array<class-string<Node>>
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2018-10-28 16:50:10 +00:00
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*/
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public function getNodeTypes(): array
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{
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return [If_::class];
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}
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/**
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* @param If_ $node
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*/
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public function refactor(Node $node): ?Node
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{
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2019-02-27 21:54:39 +00:00
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$comparedNode = $this->ifManipulator->matchIfNotNullReturnValue($node);
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2019-02-17 14:12:47 +00:00
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if ($comparedNode !== null) {
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2019-01-10 12:55:50 +00:00
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$insideIfNode = $node->stmts[0];
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2018-10-28 16:50:10 +00:00
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2019-04-13 09:20:27 +00:00
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$nextNode = $node->getAttribute(AttributeKey::NEXT_NODE);
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2020-12-24 16:28:56 +00:00
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if (! $nextNode instanceof Return_) {
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return null;
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}
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if ($nextNode->expr === null) {
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2019-01-10 12:55:50 +00:00
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return null;
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}
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2018-10-28 16:50:10 +00:00
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2021-01-30 23:20:05 +00:00
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if (! $this->valueResolver->isNull($nextNode->expr)) {
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2019-01-10 12:55:50 +00:00
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return null;
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}
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2018-10-28 16:50:10 +00:00
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$this->removeNode($nextNode);
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return $insideIfNode;
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}
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2019-02-27 21:54:39 +00:00
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$comparedNode = $this->ifManipulator->matchIfValueReturnValue($node);
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2019-02-17 14:12:47 +00:00
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if ($comparedNode !== null) {
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2019-04-13 09:20:27 +00:00
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$nextNode = $node->getAttribute(AttributeKey::NEXT_NODE);
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2019-01-10 12:55:50 +00:00
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if (! $nextNode instanceof Return_) {
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return null;
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}
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2021-02-19 12:01:23 +00:00
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if (! $this->nodeComparator->areNodesEqual($comparedNode, $nextNode->expr)) {
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2019-01-10 12:55:50 +00:00
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return null;
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}
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2018-10-28 16:50:10 +00:00
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$this->removeNode($nextNode);
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return clone $nextNode;
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}
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return null;
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}
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}
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