JsonValidateRector.php

<?php

declare(strict_types=1);

namespace Rector\Php83\Rector\BooleanAnd;

use PhpParser\Node;
use PhpParser\Node\Expr\BinaryOp\BooleanAnd;
use PhpParser\Node\Expr\BinaryOp\Identical;
use PhpParser\Node\Expr\BinaryOp\NotIdentical;
use PhpParser\Node\Expr\ConstFetch;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Name;
use Rector\Rector\AbstractRector;
use Rector\ValueObject\PhpVersionFeature;
use Rector\ValueObject\PolyfillPackage;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Rector\VersionBonding\Contract\RelatedPolyfillInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * @see \Rector\Tests\Php83\Rector\BooleanAnd\JsonValidateRector\JsonValidateRectorTest
 */
final class JsonValidateRector extends AbstractRector implements MinPhpVersionInterface, RelatedPolyfillInterface
{
    public function provideMinPhpVersion(): int
    {
        return PhpVersionFeature::JSON_VALIDATE;
    }

    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition(
            'Replace json_decode($json, true) !== null && json_last_error() === JSON_ERROR_NONE  with json_validate()',
            [
                new CodeSample(
                    <<<'CODE_SAMPLE'
if (json_decode($json, true) !== null && json_last_error() === JSON_ERROR_NONE) {
}

CODE_SAMPLE
                    ,
                    <<<'CODE_SAMPLE'
if (json_validate($json)) {
}    
CODE_SAMPLE
                ),
            ]
        );
    }

    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes(): array
    {
        return [BooleanAnd::class];
    }

    /**
     * @param BooleanAnd $node
     */
    public function refactor(Node $node): ?Node
    {
        $funcCall = $this->matchJsonValidateArg($node);

        if (! $funcCall instanceof FuncCall) {
            return null;
        }

        if ($funcCall->isFirstClassCallable()) {
            return null;
        }

        if (isset($funcCall->getArgs()[1])) {
            unset($funcCall->args[1]);
        }

        $funcCall->name = new Name('json_validate');

        return $funcCall;
    }

    public function providePolyfillPackage(): string
    {
        return PolyfillPackage::PHP_83;
    }

    public function matchJsonValidateArg(BooleanAnd $booleanAnd): ?FuncCall
    {
        if ($booleanAnd->left instanceof NotIdentical) {
            $notIdentical = $booleanAnd->left;

            if ($notIdentical->left instanceof FuncCall
                && $this->isName($notIdentical->left->name, 'json_decode')
                && $notIdentical->right instanceof ConstFetch
                && $this->isName($notIdentical->right->name, 'null')) {

                // right side: json_last_error() === JSON_ERROR_NONE
                if (! $booleanAnd->right instanceof Identical) {
                    return null;
                }

                $identical = $booleanAnd->right;

                if ($identical->left instanceof FuncCall
                    && $this->isName($identical->left->name, 'json_last_error')
                    && $identical->right instanceof ConstFetch
                    && $this->isName($identical->right->name, 'JSON_ERROR_NONE')) {

                    return $notIdentical->left; // return json_decode(...) call
                }
            }

        }

        return null;
    }
}