2022-11-01 19:57:56 +00:00
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<?php
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declare (strict_types=1);
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namespace Rector\CodeQuality\Rector\Ternary;
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use PhpParser\Node;
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use PhpParser\Node\Expr\ArrayDimFetch;
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use PhpParser\Node\Expr\BinaryOp\Coalesce;
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use PhpParser\Node\Expr\BooleanNot;
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use PhpParser\Node\Expr\Empty_;
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use PhpParser\Node\Expr\Ternary;
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use Rector\Core\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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* @see \Rector\Tests\CodeQuality\Rector\Ternary\TernaryEmptyArrayArrayDimFetchToCoalesceRector\TernaryEmptyArrayArrayDimFetchToCoalesceRectorTest
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*/
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final class TernaryEmptyArrayArrayDimFetchToCoalesceRector extends AbstractRector
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{
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Change ternary empty on array property with array dim fetch to coalesce operator', [new CodeSample(<<<'CODE_SAMPLE'
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final class SomeClass
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{
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private array $items = [];
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public function run()
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{
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return ! empty($this->items) ? $this->items[0] : 'default';
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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final class SomeClass
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{
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private array $items = [];
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public function run()
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{
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return $this->items[0] ?? 'default';
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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 [Ternary::class];
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}
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/**
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* @param Ternary $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if (!$node->cond instanceof BooleanNot) {
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return null;
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}
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$negagedExpr = $node->cond->expr;
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if (!$negagedExpr instanceof Empty_) {
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return null;
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}
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$emptyExprType = $this->getType($negagedExpr->expr);
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2022-11-15 15:22:43 +00:00
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if (!$emptyExprType->isArray()->yes()) {
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2022-11-01 19:57:56 +00:00
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return null;
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}
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if (!$node->if instanceof ArrayDimFetch) {
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return null;
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}
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$dimFetchVar = $node->if->var;
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if (!$this->nodeComparator->areNodesEqual($negagedExpr->expr, $dimFetchVar)) {
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return null;
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}
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return new Coalesce($node->if, $node->else);
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}
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}
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