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<?php declare (strict_types=1); namespace Rector\CodeQuality\Rector\For_; use PhpParser\Node; use PhpParser\Node\Expr\Assign; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Expr\Variable; use PhpParser\Node\Stmt; use PhpParser\Node\Stmt\Expression; use PhpParser\Node\Stmt\For_; use PHPStan\Analyser\Scope; use Rector\Core\Rector\AbstractScopeAwareRector; use Rector\Naming\Naming\VariableNaming; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\CodeQuality\Rector\For_\ForRepeatedCountToOwnVariableRector\ForRepeatedCountToOwnVariableRectorTest */ final class ForRepeatedCountToOwnVariableRector extends AbstractScopeAwareRector { /** * @readonly * @var \Rector\Naming\Naming\VariableNaming */ private $variableNaming; public function __construct(VariableNaming $variableNaming) { $this->variableNaming = $variableNaming; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Change count() in for function to own variable', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { public function run($items) { for ($i = 5; $i <= count($items); $i++) { echo $items[$i]; } } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { public function run($items) { $itemsCount = count($items); for ($i = 5; $i <= $itemsCount; $i++) { echo $items[$i]; } } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [For_::class]; } /** * @param For_ $node * @return Stmt[]|null */ public function refactorWithScope(Node $node, Scope $scope) : ?array { $countInCond = null; $variableName = null; $this->traverseNodesWithCallable($node->cond, function (Node $node) use(&$countInCond, &$variableName, $scope) : ?Variable { if (!$node instanceof FuncCall) { return null; } if (!$this->isName($node, 'count')) { return null; } $countInCond = $node; $variableName = $this->variableNaming->resolveFromFuncCallFirstArgumentWithSuffix($node, 'Count', 'itemsCount', $scope); return new Variable($variableName); }); if ($countInCond === null) { return null; } if ($variableName === null) { return null; } $countAssign = new Assign(new Variable($variableName), $countInCond); return [new Expression($countAssign), $node]; } }
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