mirror of https://github.com/rectorphp/rector.git
112 lines
3.5 KiB
PHP
112 lines
3.5 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\CodingStyle\Rector\Switch_;
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use PhpParser\Node;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Expr\BinaryOp\BooleanOr;
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use PhpParser\Node\Expr\BinaryOp\Equal;
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use PhpParser\Node\Stmt\Case_;
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use PhpParser\Node\Stmt\Else_;
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use PhpParser\Node\Stmt\ElseIf_;
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use PhpParser\Node\Stmt\If_;
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use PhpParser\Node\Stmt\Switch_;
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use Rector\Core\NodeAnalyzer\ExprAnalyzer;
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use Rector\Core\Rector\AbstractRector;
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use Rector\Renaming\NodeManipulator\SwitchManipulator;
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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\CodingStyle\Rector\Switch_\BinarySwitchToIfElseRector\BinarySwitchToIfElseRectorTest
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*/
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final class BinarySwitchToIfElseRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\Renaming\NodeManipulator\SwitchManipulator
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*/
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private $switchManipulator;
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/**
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* @readonly
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* @var \Rector\Core\NodeAnalyzer\ExprAnalyzer
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*/
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private $exprAnalyzer;
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public function __construct(SwitchManipulator $switchManipulator, ExprAnalyzer $exprAnalyzer)
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{
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$this->switchManipulator = $switchManipulator;
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$this->exprAnalyzer = $exprAnalyzer;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Changes switch with 2 options to if-else', [new CodeSample(<<<'CODE_SAMPLE'
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switch ($foo) {
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case 'my string':
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$result = 'ok';
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break;
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default:
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$result = 'not ok';
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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if ($foo == 'my string') {
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$result = 'ok';
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} else {
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$result = 'not ok';
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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 [Switch_::class];
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}
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/**
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* @param Switch_ $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if (\count($node->cases) > 2) {
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return null;
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}
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// avoid removal of cases if it goes to be skipped next
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$cases = $node->cases;
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/** @var Case_ $firstCase */
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$firstCase = \array_shift($cases);
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if (!$firstCase->cond instanceof Expr) {
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return null;
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}
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if ($this->exprAnalyzer->isDynamicExpr($firstCase->cond)) {
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return null;
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}
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$secondCase = \array_shift($cases);
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// special case with empty first case → ||
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$isFirstCaseEmpty = $firstCase->stmts === [];
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if ($isFirstCaseEmpty && $secondCase instanceof Case_ && $secondCase->cond instanceof Expr) {
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$else = new BooleanOr(new Equal($node->cond, $firstCase->cond), new Equal($node->cond, $secondCase->cond));
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$ifNode = new If_($else);
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$ifNode->stmts = $this->switchManipulator->removeBreakNodes($secondCase->stmts);
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return $ifNode;
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}
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$ifNode = new If_(new Equal($node->cond, $firstCase->cond));
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$ifNode->stmts = $this->switchManipulator->removeBreakNodes($firstCase->stmts);
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// just one condition
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if (!$secondCase instanceof Case_) {
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return $ifNode;
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}
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if ($secondCase->cond instanceof Expr) {
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// has condition
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$equal = new Equal($node->cond, $secondCase->cond);
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$ifNode->elseifs[] = new ElseIf_($equal, $this->switchManipulator->removeBreakNodes($secondCase->stmts));
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} else {
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// defaults
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$ifNode->else = new Else_($this->switchManipulator->removeBreakNodes($secondCase->stmts));
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}
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return $ifNode;
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}
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}
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