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<?php
declare (strict_types=1);
namespace Rector\Php71\Rector\TryCatch;
use PhpParser\Node;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt\Catch_;
use PhpParser\Node\Stmt\TryCatch;
use Rector\Core\Contract\PhpParser\NodePrinterInterface;
use Rector\Core\Rector\AbstractRector;
use Rector\Core\ValueObject\PhpVersionFeature;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @changelog https://wiki.php.net/rfc/multiple-catch
*
* @see \Rector\Tests\Php71\Rector\TryCatch\MultiExceptionCatchRector\MultiExceptionCatchRectorTest
*/
final class MultiExceptionCatchRector extends AbstractRector implements MinPhpVersionInterface
{
/**
* @readonly
* @var \Rector\Core\Contract\PhpParser\NodePrinterInterface
*/
private $nodePrinter;
public function __construct(NodePrinterInterface $nodePrinter)
{
$this->nodePrinter = $nodePrinter;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Changes multi catch of same exception to single one | separated.', [new CodeSample(<<<'CODE_SAMPLE'
try {
// Some code...
} catch (ExceptionType1 $exception) {
$sameCode;
} catch (ExceptionType2 $exception) {
$sameCode;
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
try {
// Some code...
} catch (ExceptionType1 | ExceptionType2 $exception) {
$sameCode;
}
CODE_SAMPLE
)]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [TryCatch::class];
}
/**
* @param TryCatch $node
*/
public function refactor(Node $node) : ?Node
{
if (\count($node->catches) < 2) {
return null;
}
$catchKeysByContent = $this->collectCatchKeysByContent($node);
$hasRemovedCatch = \false;
/** @var Catch_[] $catchKeys */
foreach ($catchKeysByContent as $catchKeys) {
// no duplicates
$count = \count($catchKeys);
if ($count < 2) {
continue;
}
$collectedTypes = $this->collectTypesFromCatchedByIds($catchKeys);
/** @var Catch_ $firstCatch */
$firstCatch = \array_shift($catchKeys);
$firstCatch->types = $collectedTypes;
foreach ($catchKeys as $catchKey) {
$this->removeNode($catchKey);
$hasRemovedCatch = \true;
}
}
if (!$hasRemovedCatch) {
return null;
}
return $node;
}
public function provideMinPhpVersion() : int
{
return PhpVersionFeature::MULTI_EXCEPTION_CATCH;
}
/**
* @return array<string, Catch_[]>
*/
private function collectCatchKeysByContent(TryCatch $tryCatch) : array
{
$catchKeysByContent = [];
foreach ($tryCatch->catches as $catch) {
$catchContent = $this->nodePrinter->print($catch->stmts);
$catchKeysByContent[$catchContent][] = $catch;
}
return $catchKeysByContent;
}
/**
* @param Catch_[] $catches
* @return Name[]
*/
private function collectTypesFromCatchedByIds(array $catches) : array
{
$collectedTypes = [];
foreach ($catches as $catch) {
$collectedTypes = \array_merge($collectedTypes, $catch->types);
}
return $collectedTypes;
}
}
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