mirror of https://github.com/rectorphp/rector.git
127 lines
3.9 KiB
PHP
127 lines
3.9 KiB
PHP
<?php
|
|
|
|
declare (strict_types=1);
|
|
namespace Rector\EarlyReturn\Rector\If_;
|
|
|
|
use PhpParser\Node;
|
|
use PhpParser\Node\Expr;
|
|
use PhpParser\Node\Expr\Assign;
|
|
use PhpParser\Node\Stmt;
|
|
use PhpParser\Node\Stmt\Else_;
|
|
use PhpParser\Node\Stmt\If_;
|
|
use PhpParser\Node\Stmt\Return_;
|
|
use Rector\Contract\PhpParser\Node\StmtsAwareInterface;
|
|
use Rector\NodeManipulator\IfManipulator;
|
|
use Rector\NodeManipulator\StmtsManipulator;
|
|
use Rector\Rector\AbstractRector;
|
|
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
|
|
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
|
|
/**
|
|
* @changelog https://engineering.helpscout.com/reducing-complexity-with-guard-clauses-in-php-and-javascript-74600fd865c7
|
|
*
|
|
* @see \Rector\Tests\EarlyReturn\Rector\If_\ChangeIfElseValueAssignToEarlyReturnRector\ChangeIfElseValueAssignToEarlyReturnRectorTest
|
|
*/
|
|
final class ChangeIfElseValueAssignToEarlyReturnRector extends AbstractRector
|
|
{
|
|
/**
|
|
* @readonly
|
|
* @var \Rector\NodeManipulator\IfManipulator
|
|
*/
|
|
private $ifManipulator;
|
|
/**
|
|
* @readonly
|
|
* @var \Rector\NodeManipulator\StmtsManipulator
|
|
*/
|
|
private $stmtsManipulator;
|
|
public function __construct(IfManipulator $ifManipulator, StmtsManipulator $stmtsManipulator)
|
|
{
|
|
$this->ifManipulator = $ifManipulator;
|
|
$this->stmtsManipulator = $stmtsManipulator;
|
|
}
|
|
public function getRuleDefinition() : RuleDefinition
|
|
{
|
|
return new RuleDefinition('Change if/else value to early return', [new CodeSample(<<<'CODE_SAMPLE'
|
|
class SomeClass
|
|
{
|
|
public function run()
|
|
{
|
|
if ($this->hasDocBlock($tokens, $index)) {
|
|
$docToken = $tokens[$this->getDocBlockIndex($tokens, $index)];
|
|
} else {
|
|
$docToken = null;
|
|
}
|
|
|
|
return $docToken;
|
|
}
|
|
}
|
|
CODE_SAMPLE
|
|
, <<<'CODE_SAMPLE'
|
|
class SomeClass
|
|
{
|
|
public function run()
|
|
{
|
|
if ($this->hasDocBlock($tokens, $index)) {
|
|
return $tokens[$this->getDocBlockIndex($tokens, $index)];
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
CODE_SAMPLE
|
|
)]);
|
|
}
|
|
/**
|
|
* @return array<class-string<Node>>
|
|
*/
|
|
public function getNodeTypes() : array
|
|
{
|
|
return [StmtsAwareInterface::class];
|
|
}
|
|
/**
|
|
* @param StmtsAwareInterface $node
|
|
*/
|
|
public function refactor(Node $node) : ?StmtsAwareInterface
|
|
{
|
|
if ($node->stmts === null) {
|
|
return null;
|
|
}
|
|
foreach ($node->stmts as $key => $stmt) {
|
|
if (!$stmt instanceof Return_) {
|
|
continue;
|
|
}
|
|
if (!$stmt->expr instanceof Expr) {
|
|
continue;
|
|
}
|
|
$previousStmt = $node->stmts[$key - 1] ?? null;
|
|
if (!$previousStmt instanceof If_) {
|
|
continue;
|
|
}
|
|
$if = $previousStmt;
|
|
if (!$this->ifManipulator->isIfAndElseWithSameVariableAssignAsLastStmts($if, $stmt->expr)) {
|
|
continue;
|
|
}
|
|
\end($if->stmts);
|
|
$lastIfStmtKey = \key($if->stmts);
|
|
\reset($if->stmts);
|
|
/** @var Assign $assign */
|
|
$assign = $this->stmtsManipulator->getUnwrappedLastStmt($if->stmts);
|
|
$returnLastIf = new Return_($assign->expr);
|
|
$this->mirrorComments($returnLastIf, $assign);
|
|
$if->stmts[$lastIfStmtKey] = $returnLastIf;
|
|
/** @var Else_ $else */
|
|
$else = $if->else;
|
|
/** @var array<int, Stmt> $elseStmts */
|
|
$elseStmts = $else->stmts;
|
|
/** @var Assign $assign */
|
|
$assign = $this->stmtsManipulator->getUnwrappedLastStmt($elseStmts);
|
|
$this->mirrorComments($stmt, $assign);
|
|
$if->else = null;
|
|
$stmt->expr = $assign->expr;
|
|
$lastStmt = \array_pop($node->stmts);
|
|
$elseStmtsExceptLast = \array_slice($elseStmts, 0, -1);
|
|
$node->stmts = \array_merge($node->stmts, $elseStmtsExceptLast, [$lastStmt]);
|
|
return $node;
|
|
}
|
|
return null;
|
|
}
|
|
}
|