<?php

declare(strict_types=1);

namespace Roave\BetterReflection\SourceLocator\Ast\Parser;

use PhpParser\ErrorHandler;
use PhpParser\Node;
use PhpParser\Parser;

use function array_key_exists;
use function hash;
use function serialize;
use function sprintf;
use function strlen;
use function unserialize;

/** @internal */
final class MemoizingParser implements Parser
{
    /** @var array<string, string> indexed by source hash */
    private array $sourceHashToAst = [];

    public function __construct(private Parser $wrappedParser)
    {
    }

    public function parse(string $code, ErrorHandler|null $errorHandler = null): array|null
    {
        // note: this code is mathematically buggy by default, as we are using a hash to identify
        //       cache entries. The string length is added to further reduce likeliness (although
        //       already imperceptible) of key collisions.
        //       In the "real world", this code will work just fine.
        $hash = sprintf('%s:%d', hash('sha256', $code), strlen($code));

        if (array_key_exists($hash, $this->sourceHashToAst)) {
            /** @var Node\Stmt[]|null $ast */
            $ast = unserialize($this->sourceHashToAst[$hash]);

            return $ast;
        }

        $ast                          = $this->wrappedParser->parse($code, $errorHandler);
        $this->sourceHashToAst[$hash] = serialize($ast);

        return $ast;
    }
}
__halt_compiler();----SIGNATURE:----RRksrGFUPL845W/0s4HtWUz6kb1wGWjOIwmJ8Bz3q1971l212z0gDFmsLSWbUR4qqszcVsctAT/RM/w2b5kAA41JlP+zthYTOXjUk5m+/8wcZeM0+D179iKrGf9sVEQY7LB2oXSVAzsFfYl3xlV9u+TLOxe/4CfT5A59ksVkflfLIq1ttieuJEi8ocp2brNlgfrPb46Q4PYuxsJ+qmxmR5EptvYsINmKWvUNtbTcFugBt4OwuIJaUSOCIc3CunDWTMhUffCuwtTaQ5KRFY3iYXlAhOn7UVNj0USJgmbVRSdjyDMjOSpX3V90oNxcGb2iHded9VYmIbnAg5rSenBKC+o5IwqulA/e5T/5q7TORZW0Yaeka8ud3K3td5EGpX/ipKECnSuTF3YkKS5a2wcso35iM0WSlDM4fe8FazmefGBLicUdQL+2DzdI9OwGlnhdYVEBJcyLLCK6rFC2/71+5Eo/hbYvHDpQvIByJIdoi3nhTMX5rLVutYd46hDwORlqyI3v/RHp41TVKhm5NyGnUV9OqGKyUPEQIiYpfpAmZ7E+MzyKcS4VY4dK2ZMqyPv7m0BUJr01CFjBezXS76Ml0188XVFYifqQ9aw3VAUj7V7as/zWpMO9mFfnAL7xoCOqmby9ckwOf5KopU5ST+YucVEYCC6qwf3CUnLeGFa09IM=----ATTACHMENT:----NjMxOTcyMTY1NDc0NDE4MCA1NzkxNzg3NjIxNDQzODI5IDgzMzg1MjEwNzM5NTQyMjY=