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<?php declare (strict_types=1); namespace Rector\DeadCode\NodeManipulator; use PhpParser\Node\Arg; use PhpParser\Node\Expr; use PhpParser\Node\Expr\BinaryOp\Greater; use PhpParser\Node\Expr\BinaryOp\GreaterOrEqual; use PhpParser\Node\Expr\BinaryOp\Smaller; use PhpParser\Node\Expr\BinaryOp\SmallerOrEqual; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Scalar\LNumber; use Rector\Core\PhpParser\Comparing\NodeComparator; use Rector\NodeNameResolver\NodeNameResolver; final class CountManipulator { /** * @readonly * @var \Rector\NodeNameResolver\NodeNameResolver */ private $nodeNameResolver; /** * @readonly * @var \Rector\Core\PhpParser\Comparing\NodeComparator */ private $nodeComparator; public function __construct(NodeNameResolver $nodeNameResolver, NodeComparator $nodeComparator) { $this->nodeNameResolver = $nodeNameResolver; $this->nodeComparator = $nodeComparator; } public function isCounterHigherThanOne(Expr $node, Expr $expr) : bool { // e.g. count($values) > 0 if ($node instanceof Greater) { return $this->isGreater($node, $expr); } // e.g. count($values) >= 1 if ($node instanceof GreaterOrEqual) { return $this->isGreaterOrEqual($node, $expr); } // e.g. 0 < count($values) if ($node instanceof Smaller) { return $this->isSmaller($node, $expr); } // e.g. 1 <= count($values) if ($node instanceof SmallerOrEqual) { return $this->isSmallerOrEqual($node, $expr); } return \false; } private function isGreater(Greater $greater, Expr $expr) : bool { if (!$this->isNumber($greater->right, 0)) { return \false; } return $this->isCountWithExpression($greater->left, $expr); } private function isGreaterOrEqual(GreaterOrEqual $greaterOrEqual, Expr $expr) : bool { if (!$this->isNumber($greaterOrEqual->right, 1)) { return \false; } return $this->isCountWithExpression($greaterOrEqual->left, $expr); } private function isSmaller(Smaller $smaller, Expr $expr) : bool { if (!$this->isNumber($smaller->left, 0)) { return \false; } return $this->isCountWithExpression($smaller->right, $expr); } private function isSmallerOrEqual(SmallerOrEqual $smallerOrEqual, Expr $expr) : bool { if (!$this->isNumber($smallerOrEqual->left, 1)) { return \false; } return $this->isCountWithExpression($smallerOrEqual->right, $expr); } private function isNumber(Expr $expr, int $value) : bool { if (!$expr instanceof LNumber) { return \false; } return $expr->value === $value; } private function isCountWithExpression(Expr $node, Expr $expr) : bool { if (!$node instanceof FuncCall) { return \false; } if (!$this->nodeNameResolver->isName($node, 'count')) { return \false; } if (!isset($node->args[0])) { return \false; } if (!$node->args[0] instanceof Arg) { return \false; } $countedExpr = $node->args[0]->value; return $this->nodeComparator->areNodesEqual($countedExpr, $expr); } }
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