mirror of
https://github.com/rectorphp/rector.git
synced 2024-05-28 07:00:04 +00:00
7e7a2f067a
476cfb00cb
disable fallback for now
122 lines
4.2 KiB
PHP
122 lines
4.2 KiB
PHP
<?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;
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use PhpParser\Node\Expr\BinaryOp;
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use PhpParser\Node\Expr\BooleanNot;
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use PhpParser\Node\Expr\Cast\Bool_;
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use PhpParser\Node\Expr\Ternary;
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use Rector\PhpParser\Node\AssignAndBinaryMap;
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use Rector\PhpParser\Node\Value\ValueResolver;
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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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* @see \Rector\Tests\CodeQuality\Rector\Ternary\UnnecessaryTernaryExpressionRector\UnnecessaryTernaryExpressionRectorTest
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*/
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final class UnnecessaryTernaryExpressionRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\PhpParser\Node\AssignAndBinaryMap
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*/
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private $assignAndBinaryMap;
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/**
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* @readonly
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* @var \Rector\PhpParser\Node\Value\ValueResolver
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*/
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private $valueResolver;
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public function __construct(AssignAndBinaryMap $assignAndBinaryMap, ValueResolver $valueResolver)
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{
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$this->assignAndBinaryMap = $assignAndBinaryMap;
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$this->valueResolver = $valueResolver;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Remove unnecessary ternary expressions', [new CodeSample('$foo === $bar ? true : false;', '$foo === $bar;')]);
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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->if instanceof Expr) {
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return null;
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}
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$ifExpression = $node->if;
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if (!$this->valueResolver->isTrueOrFalse($ifExpression)) {
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return null;
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}
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$elseExpression = $node->else;
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if (!$this->valueResolver->isTrueOrFalse($elseExpression)) {
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return null;
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}
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$condition = $node->cond;
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if (!$condition instanceof BinaryOp) {
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return $this->processNonBinaryCondition($ifExpression, $elseExpression, $condition);
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}
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if ($this->valueResolver->isNull($ifExpression)) {
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return null;
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}
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if ($this->valueResolver->isNull($elseExpression)) {
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return null;
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}
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/** @var BinaryOp $binaryOperation */
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$binaryOperation = $node->cond;
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if ($this->valueResolver->isTrue($ifExpression) && $this->valueResolver->isFalse($elseExpression)) {
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return $binaryOperation;
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}
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$inversedBinaryClass = $this->assignAndBinaryMap->getInversed($binaryOperation);
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if ($inversedBinaryClass === null) {
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return null;
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}
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return new $inversedBinaryClass($binaryOperation->left, $binaryOperation->right);
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}
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private function processNonBinaryCondition(Expr $ifExpression, Expr $elseExpression, Expr $condition) : ?Node
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{
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if ($this->valueResolver->isTrue($ifExpression) && $this->valueResolver->isFalse($elseExpression)) {
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return $this->processTrueIfExpressionWithFalseElseExpression($condition);
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}
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if (!$this->valueResolver->isFalse($ifExpression)) {
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return null;
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}
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if (!$this->valueResolver->isTrue($elseExpression)) {
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return null;
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}
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return $this->processFalseIfExpressionWithTrueElseExpression($condition);
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}
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private function processTrueIfExpressionWithFalseElseExpression(Expr $expr) : Expr
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{
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$exprType = $this->getType($expr);
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if ($exprType->isBoolean()->yes()) {
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return $expr;
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}
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return new Bool_($expr);
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}
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private function processFalseIfExpressionWithTrueElseExpression(Expr $expr) : Expr
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{
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if ($expr instanceof BooleanNot) {
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$negatedExprType = $this->getType($expr->expr);
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if ($negatedExprType->isBoolean()->yes()) {
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return $expr->expr;
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}
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return new Bool_($expr->expr);
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}
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$exprType = $this->getType($expr);
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if ($exprType->isBoolean()->yes()) {
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return new BooleanNot($expr);
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}
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return new BooleanNot(new Bool_($expr));
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}
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}
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