mirror of https://github.com/rectorphp/rector.git
222 lines
8.2 KiB
PHP
222 lines
8.2 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DowngradePhp73\Rector\FuncCall;
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use PhpParser\Node;
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use PhpParser\Node\Arg;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\BinaryOp\BooleanOr;
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use PhpParser\Node\Expr\CallLike;
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use PhpParser\Node\Expr\Cast\Array_;
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use PhpParser\Node\Expr\FuncCall;
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use PhpParser\Node\Expr\MethodCall;
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use PhpParser\Node\Expr\New_;
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use PhpParser\Node\Expr\NullsafeMethodCall;
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use PhpParser\Node\Expr\StaticCall;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Name;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Echo_;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\Node\Stmt\If_;
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use PhpParser\Node\Stmt\Return_;
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use PhpParser\Node\Stmt\Switch_;
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use PHPStan\Analyser\Scope;
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use Rector\Contract\PhpParser\Node\StmtsAwareInterface;
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use Rector\Naming\Naming\VariableNaming;
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use Rector\NodeAnalyzer\ExprInTopStmtMatcher;
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use Rector\NodeTypeResolver\Node\AttributeKey;
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use Rector\Rector\AbstractRector;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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/**
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* @changelog https://wiki.php.net/rfc/array_key_first_last
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*
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* @see \Rector\Tests\DowngradePhp73\Rector\FuncCall\DowngradeArrayKeyFirstLastRector\DowngradeArrayKeyFirstLastRectorTest
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*/
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final class DowngradeArrayKeyFirstLastRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\Naming\Naming\VariableNaming
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*/
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private $variableNaming;
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/**
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* @readonly
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* @var \Rector\NodeAnalyzer\ExprInTopStmtMatcher
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*/
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private $exprInTopStmtMatcher;
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public function __construct(VariableNaming $variableNaming, ExprInTopStmtMatcher $exprInTopStmtMatcher)
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{
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$this->variableNaming = $variableNaming;
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$this->exprInTopStmtMatcher = $exprInTopStmtMatcher;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Downgrade array_key_first() and array_key_last() functions', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run($items)
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{
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$firstItemKey = array_key_first($items);
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run($items)
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{
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reset($items);
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$firstItemKey = key($items);
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}
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}
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CODE_SAMPLE
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)]);
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}
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/**
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* @return array<class-string<Node>>
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*/
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public function getNodeTypes() : array
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{
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return [StmtsAwareInterface::class, Switch_::class, Return_::class, Expression::class, Echo_::class];
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}
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/**
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* @param StmtsAwareInterface|Switch_|Return_|Expression|Echo_ $node
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* @return Node[]|null
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*/
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public function refactor(Node $node) : ?array
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{
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$exprArrayKeyFirst = $this->exprInTopStmtMatcher->match($node, function (Node $subNode) : bool {
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if (!$subNode instanceof FuncCall) {
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return \false;
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}
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return $this->isName($subNode, 'array_key_first');
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});
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if ($exprArrayKeyFirst instanceof FuncCall) {
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return $this->refactorArrayKeyFirst($exprArrayKeyFirst, $node);
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}
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$exprArrayKeyLast = $this->exprInTopStmtMatcher->match($node, function (Node $subNode) : bool {
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if (!$subNode instanceof FuncCall) {
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return \false;
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}
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return $this->isName($subNode, 'array_key_last');
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});
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if ($exprArrayKeyLast instanceof FuncCall) {
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return $this->refactorArrayKeyLast($exprArrayKeyLast, $node);
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}
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return null;
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}
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private function resolveVariableFromCallLikeScope(CallLike $callLike, ?Scope $scope) : Variable
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{
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/** @var MethodCall|FuncCall|StaticCall|New_|NullsafeMethodCall $callLike */
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if ($callLike instanceof New_) {
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$variableName = (string) $this->nodeNameResolver->getName($callLike->class);
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} else {
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$variableName = (string) $this->nodeNameResolver->getName($callLike->name);
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}
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if ($variableName === '') {
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$variableName = 'array';
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}
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return new Variable($this->variableNaming->createCountedValueName($variableName, $scope));
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}
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/**
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* @return Node[]|null
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* @param \Rector\Contract\PhpParser\Node\StmtsAwareInterface|\PhpParser\Node\Stmt\Switch_|\PhpParser\Node\Stmt\Return_|\PhpParser\Node\Stmt\Expression|\PhpParser\Node\Stmt\Echo_ $stmt
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*/
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private function refactorArrayKeyFirst(FuncCall $funcCall, $stmt) : ?array
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{
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$args = $funcCall->getArgs();
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if (!isset($args[0])) {
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return null;
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}
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$originalArray = $args[0]->value;
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$array = $this->resolveCastedArray($originalArray);
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$newStmts = [];
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if ($originalArray instanceof CallLike) {
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$scope = $originalArray->getAttribute(AttributeKey::SCOPE);
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$array = $this->resolveVariableFromCallLikeScope($originalArray, $scope);
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}
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if ($originalArray !== $array) {
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$newStmts[] = new Expression(new Assign($array, $originalArray));
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}
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$resetFuncCall = $this->nodeFactory->createFuncCall('reset', [$array]);
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$newStmts[] = $this->resolvePrependNewStmt($array, $resetFuncCall, $stmt);
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$funcCall->name = new Name('key');
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if ($originalArray !== $array) {
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$firstArg = $args[0];
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$firstArg->value = $array;
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}
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$newStmts[] = $stmt;
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return $newStmts;
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}
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/**
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* @return Node[]|null
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* @param \Rector\Contract\PhpParser\Node\StmtsAwareInterface|\PhpParser\Node\Stmt\Switch_|\PhpParser\Node\Stmt\Return_|\PhpParser\Node\Stmt\Expression|\PhpParser\Node\Stmt\Echo_ $stmt
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*/
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private function refactorArrayKeyLast(FuncCall $funcCall, $stmt) : ?array
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{
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$args = $funcCall->getArgs();
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$firstArg = $args[0] ?? null;
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if (!$firstArg instanceof Arg) {
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return null;
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}
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$originalArray = $firstArg->value;
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$array = $this->resolveCastedArray($originalArray);
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$newStmts = [];
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if ($originalArray instanceof CallLike) {
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$scope = $originalArray->getAttribute(AttributeKey::SCOPE);
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$array = $this->resolveVariableFromCallLikeScope($originalArray, $scope);
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}
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if ($originalArray !== $array) {
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$newStmts[] = new Expression(new Assign($array, $originalArray));
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}
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$endFuncCall = $this->nodeFactory->createFuncCall('end', [$array]);
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$newStmts[] = $this->resolvePrependNewStmt($array, $endFuncCall, $stmt);
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$funcCall->name = new Name('key');
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if ($originalArray !== $array) {
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$firstArg->value = $array;
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}
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$newStmts[] = $stmt;
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$resetExpression = new Expression($this->nodeFactory->createFuncCall('reset', [$array]));
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if (!$stmt instanceof StmtsAwareInterface && !$stmt instanceof Return_) {
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$newStmts[] = new Expression($this->nodeFactory->createFuncCall('reset', [$array]));
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}
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if ($stmt instanceof StmtsAwareInterface) {
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$stmt->stmts = \array_merge([$resetExpression], $stmt->stmts);
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}
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return $newStmts;
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}
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/**
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* @param \PhpParser\Node\Expr|\PhpParser\Node\Expr\Variable $array
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* @param \PhpParser\Node\Stmt|\Rector\Contract\PhpParser\Node\StmtsAwareInterface $stmt
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* @return \PhpParser\Node\Stmt\Expression|\PhpParser\Node\Stmt\If_
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*/
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private function resolvePrependNewStmt($array, FuncCall $funcCall, $stmt)
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{
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if (!$stmt instanceof If_ || $stmt->cond instanceof FuncCall || !$stmt->cond instanceof BooleanOr) {
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return new Expression($funcCall);
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}
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$if = new If_($this->nodeFactory->createFuncCall('is_array', [$array]));
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$if->stmts[] = new Expression($funcCall);
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return $if;
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}
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/**
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* @return \PhpParser\Node\Expr|\PhpParser\Node\Expr\Variable
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*/
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private function resolveCastedArray(Expr $expr)
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{
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if (!$expr instanceof Array_) {
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return $expr;
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}
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if ($expr->expr instanceof Array_) {
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return $this->resolveCastedArray($expr->expr);
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}
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$scope = $expr->getAttribute(AttributeKey::SCOPE);
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$variableName = $this->variableNaming->createCountedValueName((string) $this->nodeNameResolver->getName($expr->expr), $scope);
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return new Variable($variableName);
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}
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}
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