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Mini Shell
Mini Shell
<?php
declare (strict_types=1);
namespace Rector\CodeQuality\Rector\Concat;
use RectorPrefix202209\Nette\Utils\Strings;
use PhpParser\Node;
use PhpParser\Node\Expr\BinaryOp\Concat;
use PhpParser\Node\Scalar\String_;
use Rector\Core\Rector\AbstractRector;
use Rector\NodeTypeResolver\Node\AttributeKey;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @see \Rector\Tests\CodeQuality\Rector\Concat\JoinStringConcatRector\JoinStringConcatRectorTest
*/
final class JoinStringConcatRector extends AbstractRector
{
/**
* @var int
*/
private const LINE_BREAK_POINT = 100;
/**
* @var bool
*/
private $nodeReplacementIsRestricted = \false;
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Joins concat of 2 strings, unless the length is too long', [new CodeSample(<<<'CODE_SAMPLE'
class SomeClass
{
public function run()
{
$name = 'Hi' . ' Tom';
}
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
class SomeClass
{
public function run()
{
$name = 'Hi Tom';
}
}
CODE_SAMPLE
)]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [Concat::class];
}
/**
* @param Concat $node
*/
public function refactor(Node $node) : ?Node
{
$this->nodeReplacementIsRestricted = \false;
if (!$this->isTopMostConcatNode($node)) {
return null;
}
$joinedNode = $this->joinConcatIfStrings($node);
if (!$joinedNode instanceof String_) {
return null;
}
if ($this->nodeReplacementIsRestricted) {
return null;
}
return $joinedNode;
}
private function isTopMostConcatNode(Concat $concat) : bool
{
$parentNode = $concat->getAttribute(AttributeKey::PARENT_NODE);
return !$parentNode instanceof Concat;
}
/**
* @return \PhpParser\Node\Expr\BinaryOp\Concat|\PhpParser\Node\Scalar\String_
*/
private function joinConcatIfStrings(Concat $node)
{
$concat = clone $node;
if ($concat->left instanceof Concat) {
$concat->left = $this->joinConcatIfStrings($concat->left);
}
if ($concat->right instanceof Concat) {
$concat->right = $this->joinConcatIfStrings($concat->right);
}
if (!$concat->left instanceof String_) {
return $node;
}
if (!$concat->right instanceof String_) {
return $node;
}
$leftValue = $concat->left->value;
$rightValue = $concat->right->value;
if ($leftValue === "\n") {
$this->nodeReplacementIsRestricted = \true;
return $node;
}
if ($rightValue === "\n") {
$this->nodeReplacementIsRestricted = \true;
return $node;
}
$resultString = new String_($leftValue . $rightValue);
if (Strings::length($resultString->value) >= self::LINE_BREAK_POINT) {
$this->nodeReplacementIsRestricted = \true;
return $node;
}
return $resultString;
}
}
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