<?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:----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----ATTACHMENT:----NzU4MzM1OTMxMDc1MTYxMSA1NzU5MTg0NDEwNTcxOTIzIDg4OTUwNjExNTU0ODU5Nw==