class MultipleValidationWithAnd

class MultipleValidationWithAnd implements EmailValidation {
    
    /**
     * If one of validations fails, the remaining validations will be skipped.
     * This means MultipleErrors will only contain a single error, the first found.
     */
    public const STOP_ON_ERROR = 0;
    
    /**
     * All of validations will be invoked even if one of them got failure.
     * So MultipleErrors will contain all causes.
     */
    public const ALLOW_ALL_ERRORS = 1;
    
    /**
     * @var Warning[]
     */
    private $warnings = [];
    
    /**
     * @var MultipleErrors|null
     */
    private $error;
    
    /**
     * @param EmailValidation[] $validations The validations.
     * @param int               $mode        The validation mode (one of the constants).
     */
    public function __construct(array $validations, int $mode = self::ALLOW_ALL_ERRORS) {
        if (count($validations) == 0) {
            throw new EmptyValidationList();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function isValid(string $email, EmailLexer $emailLexer) : bool {
        $result = true;
        foreach ($this->validations as $validation) {
            $emailLexer->reset();
            $validationResult = $validation->isValid($email, $emailLexer);
            $result = $result && $validationResult;
            $this->warnings = [
                $this->warnings,
                $validation->getWarnings(),
            ];
            if (!$validationResult) {
                $this->processError($validation);
            }
            if ($this->shouldStop($result)) {
                break;
            }
        }
        return $result;
    }
    private function initErrorStorage() : void {
        if (null === $this->error) {
            $this->error = new MultipleErrors();
        }
    }
    private function processError(EmailValidation $validation) : void {
        if (null !== $validation->getError()) {
            $this->initErrorStorage();
            
            /** @psalm-suppress PossiblyNullReference */
            $this->error
                ->addReason($validation->getError()
                ->reason());
        }
    }
    private function shouldStop(bool $result) : bool {
        return !$result && $this->mode === self::STOP_ON_ERROR;
    }
    
    /**
     * Returns the validation errors.
     */
    public function getError() : ?InvalidEmail {
        return $this->error;
    }
    
    /**
     * @return Warning[]
     */
    public function getWarnings() : array {
        return $this->warnings;
    }

}