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<?php declare (strict_types=1); namespace Rector\CodeQuality\Rector\If_; use PhpParser\Node; use PhpParser\Node\Stmt\Else_; use PhpParser\Node\Stmt\ElseIf_; use PhpParser\Node\Stmt\If_; use PhpParser\Node\Stmt\Nop; use Rector\NodeTypeResolver\Node\AttributeKey; use Rector\Rector\AbstractRector; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\CodeQuality\Rector\If_\ShortenElseIfRector\ShortenElseIfRectorTest */ final class ShortenElseIfRector extends AbstractRector { public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Shortens else/if to elseif', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { public function run() { if ($cond1) { return $action1; } else { if ($cond2) { return $action2; } } } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { public function run() { if ($cond1) { return $action1; } elseif ($cond2) { return $action2; } } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [If_::class]; } /** * @param If_ $node */ public function refactor(Node $node) : ?Node { return $this->shortenElseIf($node); } private function shortenElseIf(If_ $node) : ?If_ { if (!$node->else instanceof Else_) { return null; } $else = $node->else; if (\count($else->stmts) !== 1) { return null; } $if = $else->stmts[0]; if (!$if instanceof If_) { return null; } // Try to shorten the nested if before transforming it to elseif $refactored = $this->shortenElseIf($if); if ($refactored instanceof If_) { $if = $refactored; } if ($if->stmts === []) { $nop = new Nop(); $nop->setAttribute(AttributeKey::COMMENTS, $if->getComments()); $if->stmts[] = $nop; } else { $currentStmt = \current($if->stmts); $mergedComments = \array_merge($if->getComments(), $currentStmt->getComments()); $currentStmt->setAttribute(AttributeKey::COMMENTS, $mergedComments); } $node->elseifs[] = new ElseIf_($if->cond, $if->stmts); $node->else = $if->else; $node->elseifs = \array_merge($node->elseifs, $if->elseifs); return $node; } }
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