%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
declare (strict_types=1);
namespace Rector\Php72\Rector\FuncCall;
use PhpParser\Node;
use PhpParser\Node\Arg;
use PhpParser\Node\Expr\BinaryOp\Identical;
use PhpParser\Node\Expr\BinaryOp\NotIdentical;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Expr\Ternary;
use PhpParser\Node\Stmt\Class_;
use PHPStan\Analyser\Scope;
use PHPStan\Type\NullType;
use Rector\Core\Rector\AbstractScopeAwareRector;
use Rector\Core\ValueObject\PhpVersionFeature;
use Rector\NodeTypeResolver\Node\AttributeKey;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @changelog http://php.net/manual/en/migration72.incompatible.php#migration72.incompatible.no-null-to-get_class https://3v4l.org/sk0fp
*
* @see \Rector\Tests\Php72\Rector\FuncCall\GetClassOnNullRector\GetClassOnNullRectorTest
*/
final class GetClassOnNullRector extends AbstractScopeAwareRector implements MinPhpVersionInterface
{
public function provideMinPhpVersion() : int
{
return PhpVersionFeature::NO_NULL_ON_GET_CLASS;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Null is no more allowed in get_class()', [new CodeSample(<<<'CODE_SAMPLE'
final class SomeClass
{
public function getItem()
{
$value = null;
return get_class($value);
}
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
final class SomeClass
{
public function getItem()
{
$value = null;
return $value !== null ? get_class($value) : self::class;
}
}
CODE_SAMPLE
)]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [FuncCall::class];
}
/**
* @param FuncCall $node
*/
public function refactorWithScope(Node $node, Scope $scope) : ?Node
{
if (!$this->isName($node, 'get_class')) {
return null;
}
if (!isset($node->args[0])) {
return null;
}
if (!$node->args[0] instanceof Arg) {
return null;
}
$firstArgValue = $node->args[0]->value;
if (!$scope->isInClass()) {
return null;
}
// possibly already changed
if ($this->shouldSkip($node)) {
return null;
}
$firstArgType = $this->getType($firstArgValue);
if (!$this->nodeTypeResolver->isNullableType($firstArgValue) && !$firstArgType instanceof NullType) {
return null;
}
$notIdentical = new NotIdentical($firstArgValue, $this->nodeFactory->createNull());
$funcCall = $this->createGetClassFuncCall($node);
$selfClassConstFetch = $this->nodeFactory->createClassConstReference('self');
return new Ternary($notIdentical, $funcCall, $selfClassConstFetch);
}
private function shouldSkip(FuncCall $funcCall) : bool
{
$isJustAdded = (bool) $funcCall->getAttribute(AttributeKey::DO_NOT_CHANGE);
if ($isJustAdded) {
return \true;
}
$classLike = $this->betterNodeFinder->findParentType($funcCall, Class_::class);
if (!$classLike instanceof Class_) {
return \true;
}
$parentNode = $funcCall->getAttribute(AttributeKey::PARENT_NODE);
if ($parentNode instanceof Ternary) {
if ($this->isIdenticalToNotNull($funcCall, $parentNode)) {
return \true;
}
return $this->isNotIdenticalToNull($funcCall, $parentNode);
}
return \false;
}
private function createGetClassFuncCall(FuncCall $oldFuncCall) : FuncCall
{
$funcCall = new FuncCall($oldFuncCall->name, $oldFuncCall->args);
$funcCall->setAttribute(AttributeKey::DO_NOT_CHANGE, \true);
return $funcCall;
}
/**
* E.g. "$value === [!null] ? get_class($value)"
*/
private function isIdenticalToNotNull(FuncCall $funcCall, Ternary $ternary) : bool
{
if (!$ternary->cond instanceof Identical) {
return \false;
}
if (!isset($funcCall->args[0])) {
return \false;
}
if (!$funcCall->args[0] instanceof Arg) {
return \false;
}
if ($this->nodeComparator->areNodesEqual($ternary->cond->left, $funcCall->args[0]->value) && !$this->valueResolver->isNull($ternary->cond->right)) {
return \true;
}
if (!$this->nodeComparator->areNodesEqual($ternary->cond->right, $funcCall->args[0]->value)) {
return \false;
}
return !$this->valueResolver->isNull($ternary->cond->left);
}
/**
* E.g. "$value !== null ? get_class($value)"
*/
private function isNotIdenticalToNull(FuncCall $funcCall, Ternary $ternary) : bool
{
if (!$ternary->cond instanceof NotIdentical) {
return \false;
}
if (!isset($funcCall->args[0])) {
return \false;
}
if (!$funcCall->args[0] instanceof Arg) {
return \false;
}
if ($this->nodeComparator->areNodesEqual($ternary->cond->left, $funcCall->args[0]->value) && $this->valueResolver->isNull($ternary->cond->right)) {
return \true;
}
if (!$this->nodeComparator->areNodesEqual($ternary->cond->right, $funcCall->args[0]->value)) {
return \false;
}
return $this->valueResolver->isNull($ternary->cond->left);
}
}
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