<?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:----MTAzODg4NDY5MTgyMzk5MiAzNzg2MTcxMjk2Njg2Mzk3IDIyNjE5ODA5MDMyNTI0ODM=