WhiteAndBlacklistedFileNamePolicy.php

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<?php

namespace ILIAS\ResourceStorage\Policy;

abstract class WhiteAndBlacklistedFileNamePolicy implements FileNamePolicy
{
    public function __construct(protected array $blacklisted = [], protected array $whitelisted = [])
    {
    }

    public function isValidExtension(string $extension): bool
    {
        $extension = strtolower($extension);

        return in_array($extension, $this->whitelisted) && !in_array($extension, $this->blacklisted);
    }

    public function isBlockedExtension(string $extension): bool
    {
        $extension = strtolower($extension);

        return in_array($extension, $this->blacklisted);
    }

    public function check(string $extension): bool
    {
        if ($this->isBlockedExtension($extension)) {
            throw new FileNamePolicyException("Extension '$extension' is blacklisted.");
        }
        return true;
    }
}