mirror of https://github.com/rectorphp/rector.git
159 lines
5.1 KiB
PHP
159 lines
5.1 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\Php80\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\Assign;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\Node\Stmt\Return_;
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use PhpParser\Node\Stmt\Switch_;
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use PHPStan\Type\ObjectType;
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use Rector\Contract\PhpParser\Node\StmtsAwareInterface;
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use Rector\Php80\NodeAnalyzer\MatchSwitchAnalyzer;
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use Rector\Php80\NodeFactory\MatchFactory;
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use Rector\Php80\NodeResolver\SwitchExprsResolver;
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use Rector\Php80\ValueObject\CondAndExpr;
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use Rector\Php80\ValueObject\MatchResult;
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use Rector\Rector\AbstractRector;
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use Rector\ValueObject\PhpVersionFeature;
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use Rector\VersionBonding\Contract\MinPhpVersionInterface;
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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/match_expression_v2
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* @changelog https://3v4l.org/572T5
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*
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* @see \Rector\Tests\Php80\Rector\Switch_\ChangeSwitchToMatchRector\ChangeSwitchToMatchRectorTest
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*/
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final class ChangeSwitchToMatchRector extends AbstractRector implements MinPhpVersionInterface
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{
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/**
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* @readonly
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* @var \Rector\Php80\NodeResolver\SwitchExprsResolver
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*/
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private $switchExprsResolver;
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/**
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* @readonly
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* @var \Rector\Php80\NodeAnalyzer\MatchSwitchAnalyzer
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*/
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private $matchSwitchAnalyzer;
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/**
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* @readonly
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* @var \Rector\Php80\NodeFactory\MatchFactory
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*/
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private $matchFactory;
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public function __construct(SwitchExprsResolver $switchExprsResolver, MatchSwitchAnalyzer $matchSwitchAnalyzer, MatchFactory $matchFactory)
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{
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$this->switchExprsResolver = $switchExprsResolver;
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$this->matchSwitchAnalyzer = $matchSwitchAnalyzer;
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$this->matchFactory = $matchFactory;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Change switch() to match()', [new CodeSample(<<<'CODE_SAMPLE'
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switch ($input) {
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case Lexer::T_SELECT:
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$statement = 'select';
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break;
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case Lexer::T_UPDATE:
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$statement = 'update';
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break;
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default:
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$statement = 'error';
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$statement = match ($input) {
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Lexer::T_SELECT => 'select',
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Lexer::T_UPDATE => 'update',
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default => 'error',
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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];
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}
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/**
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* @param StmtsAwareInterface $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if (!\is_array($node->stmts)) {
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return null;
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}
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$hasChanged = \false;
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foreach ($node->stmts as $key => $stmt) {
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if (!$stmt instanceof Switch_) {
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continue;
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}
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$nextStmt = $node->stmts[$key + 1] ?? null;
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$condAndExprs = $this->switchExprsResolver->resolve($stmt);
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if ($this->matchSwitchAnalyzer->shouldSkipSwitch($stmt, $condAndExprs, $nextStmt)) {
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continue;
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}
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if (!$this->matchSwitchAnalyzer->haveCondAndExprsMatchPotential($condAndExprs)) {
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continue;
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}
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$isReturn = $this->matchSwitchAnalyzer->isReturnCondsAndExprs($condAndExprs);
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if ($this->nodeTypeResolver->getType($stmt->cond) instanceof ObjectType) {
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continue;
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}
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$matchResult = $this->matchFactory->createFromCondAndExprs($stmt->cond, $condAndExprs, $nextStmt);
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if (!$matchResult instanceof MatchResult) {
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continue;
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}
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$match = $matchResult->getMatch();
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if ($matchResult->shouldRemoveNextStmt() && $isReturn) {
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unset($node->stmts[$key + 1]);
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}
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$assignVar = $this->resolveAssignVar($condAndExprs);
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$hasDefaultValue = $this->matchSwitchAnalyzer->hasDefaultValue($match);
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if ($assignVar instanceof Expr) {
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if (!$hasDefaultValue) {
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continue;
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}
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$assign = new Assign($assignVar, $match);
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$node->stmts[$key] = new Expression($assign);
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$this->mirrorComments($node->stmts[$key], $stmt);
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$hasChanged = \true;
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continue;
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}
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if (!$hasDefaultValue) {
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continue;
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}
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$node->stmts[$key] = $isReturn ? new Return_($match) : new Expression($match);
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$this->mirrorComments($node->stmts[$key], $stmt);
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$hasChanged = \true;
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}
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if ($hasChanged) {
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return $node;
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}
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return null;
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}
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public function provideMinPhpVersion() : int
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{
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return PhpVersionFeature::MATCH_EXPRESSION;
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}
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/**
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* @param CondAndExpr[] $condAndExprs
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*/
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private function resolveAssignVar(array $condAndExprs) : ?Expr
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{
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foreach ($condAndExprs as $condAndExpr) {
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$expr = $condAndExpr->getExpr();
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if (!$expr instanceof Assign) {
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continue;
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}
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return $expr->var;
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}
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return null;
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}
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}
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