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<?php declare (strict_types=1); namespace Rector\CodingStyle\Rector\ClassMethod; use PhpParser\Node; use PhpParser\Node\Arg; use PhpParser\Node\Expr; use PhpParser\Node\Expr\Assign; use PhpParser\Node\Expr\Closure; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Expr\Variable; use PhpParser\Node\FunctionLike; use PhpParser\Node\Param; use PhpParser\Node\Stmt; use PhpParser\Node\Stmt\ClassMethod; use PhpParser\Node\Stmt\Expression; use PhpParser\Node\Stmt\Function_; use Rector\Core\Rector\AbstractRector; use Rector\Core\ValueObject\PhpVersionFeature; use Rector\NodeTypeResolver\Node\AttributeKey; use Rector\VersionBonding\Contract\MinPhpVersionInterface; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @changelog https://3v4l.org/d4tBd * * @see \Rector\Tests\CodingStyle\Rector\ClassMethod\FuncGetArgsToVariadicParamRector\FuncGetArgsToVariadicParamRectorTest */ final class FuncGetArgsToVariadicParamRector extends AbstractRector implements MinPhpVersionInterface { public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Refactor func_get_args() in to a variadic param', [new CodeSample(<<<'CODE_SAMPLE' function run() { $args = \func_get_args(); } CODE_SAMPLE , <<<'CODE_SAMPLE' function run(...$args) { } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [ClassMethod::class, Function_::class, Closure::class]; } /** * @param ClassMethod|Function_|Closure $node */ public function refactor(Node $node) : ?Node { if ($node->params !== []) { return null; } $assign = $this->matchFuncGetArgsVariableAssign($node); if (!$assign instanceof Assign) { return null; } if ($assign->var instanceof Variable) { $variableName = $this->getName($assign->var); if ($variableName === null) { return null; } return $this->removeOrChangeAssignToVariable($node, $assign, $variableName); } $variableName = 'args'; $assign->expr = new Variable('args'); return $this->applyVariadicParams($node, $variableName); } public function provideMinPhpVersion() : int { return PhpVersionFeature::VARIADIC_PARAM; } /** * @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure $node * @return \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure|null */ private function applyVariadicParams($node, string $variableName) { $param = $this->createVariadicParam($variableName); $variableParam = $param->var; if ($variableParam instanceof Variable && $this->hasFunctionOrClosureInside($node, $variableParam)) { return null; } $node->params[] = $param; return $node; } /** * @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure $node * @return \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure|null */ private function removeOrChangeAssignToVariable($node, Assign $assign, string $variableName) { $parent = $assign->getAttribute(AttributeKey::PARENT_NODE); if ($parent instanceof Expression) { $this->removeNode($assign); return $this->applyVariadicParams($node, $variableName); } $variable = $assign->var; /** @var ClassMethod|Function_|Closure $functionLike */ $functionLike = $this->betterNodeFinder->findParentType($parent, FunctionLike::class); /** @var Stmt[] $stmts */ $stmts = $functionLike->getStmts(); $this->traverseNodesWithCallable($stmts, function (Node $node) use($assign, $variable) : ?Expr { if (!$this->nodeComparator->areNodesEqual($node, $assign)) { return null; } if ($node instanceof Arg) { return null; } return $variable; }); $this->applyVariadicParams($functionLike, $variableName); return $node; } /** * @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure $functionLike */ private function hasFunctionOrClosureInside($functionLike, Variable $variable) : bool { if ($functionLike->stmts === null) { return \false; } return (bool) $this->betterNodeFinder->findFirst($functionLike->stmts, function (Node $node) use($variable) : bool { if (!$node instanceof Closure && !$node instanceof Function_) { return \false; } if ($node->params !== []) { return \false; } $assign = $this->matchFuncGetArgsVariableAssign($node); if (!$assign instanceof Assign) { return \false; } return $this->nodeComparator->areNodesEqual($assign->var, $variable); }); } /** * @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure $functionLike */ private function matchFuncGetArgsVariableAssign($functionLike) : ?Assign { /** @var Assign[] $assigns */ $assigns = $this->betterNodeFinder->findInstanceOf((array) $functionLike->stmts, Assign::class); foreach ($assigns as $assign) { if (!$assign->expr instanceof FuncCall) { continue; } if (!$this->isName($assign->expr, 'func_get_args')) { continue; } return $assign; } return null; } private function createVariadicParam(string $variableName) : Param { $variable = new Variable($variableName); return new Param($variable, null, null, \false, \true); } }
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