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<?php
declare (strict_types=1);
namespace Rector\CodeQuality\Rector\Assign;
use PhpParser\Node;
use PhpParser\Node\Expr\Assign;
use PhpParser\Node\Expr\BinaryOp;
use Rector\Core\PhpParser\Node\AssignAndBinaryMap;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @see \Rector\Tests\CodeQuality\Rector\Assign\CombinedAssignRector\CombinedAssignRectorTest
*/
final class CombinedAssignRector extends AbstractRector
{
/**
* @readonly
* @var \Rector\Core\PhpParser\Node\AssignAndBinaryMap
*/
private $assignAndBinaryMap;
public function __construct(AssignAndBinaryMap $assignAndBinaryMap)
{
$this->assignAndBinaryMap = $assignAndBinaryMap;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Simplify $value = $value + 5; assignments to shorter ones', [new CodeSample('$value = $value + 5;', '$value += 5;')]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [Assign::class];
}
/**
* @param Assign $node
*/
public function refactor(Node $node) : ?Node
{
if (!$node->expr instanceof BinaryOp) {
return null;
}
/** @var BinaryOp $binaryNode */
$binaryNode = $node->expr;
if (!$this->nodeComparator->areNodesEqual($node->var, $binaryNode->left)) {
return null;
}
$assignClass = $this->assignAndBinaryMap->getAlternative($binaryNode);
if ($assignClass === null) {
return null;
}
return new $assignClass($node->var, $binaryNode->right);
}
}
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