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Editing: FilenameWithChecksum.php

<?php

declare(strict_types=1);

namespace ThePhpFoundation\Attestation;

use Webmozart\Assert\Assert;

use function hash_file;

final class FilenameWithChecksum
{
    private const HASH_TYPE_SHA256 = 'sha256';

/** @var non-empty-string */
    private string $filename;
    /** @var non-empty-string */
    private string $checksum;

/**
     * @param non-empty-string $filename
     * @param non-empty-string $checksum
     */
    private function __construct(string $filename, string $checksum)
    {
        $this->filename = $filename;
        $this->checksum = $checksum;
    }

/** @param non-empty-string $filename */
    public static function fromFilename(string $filename): self
    {
        $hash = hash_file(self::HASH_TYPE_SHA256, $filename);
        Assert::stringNotEmpty($hash);

return new self($filename, $hash);
    }

/**
     * @param non-empty-string $filename
     * @param non-empty-string $checksum
     */
    public static function fromFilenameAndChecksum(string $filename, string $checksum): self
    {
        return new self($filename, $checksum);
    }

/** @return non-empty-string */
    public function checksum(): string
    {
        return $this->checksum;
    }

/** @return non-empty-string */
    public function filename(): string
    {
        return $this->filename;
    }
}

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