function FileValidationConstraintValidator::validate

File

core/modules/file/src/Plugin/Validation/Constraint/FileValidationConstraintValidator.php, line 17

Class

FileValidationConstraintValidator

Checks that a file referenced in a file field is valid.

Namespace

Code

public function validate($value, Constraint $constraint) {
    // Get the file to execute validators.
    $target = $value->get('entity')
        ->getTarget();
    if (!$target) {
        return;
    }
    $file = $target->getValue();
    // Get the validators.
    $validators = $value->getUploadValidators();
    // Always respect the configured maximum file size.
    $field_settings = $value->getFieldDefinition()
        ->getSettings();
    if (array_key_exists('max_filesize', $field_settings)) {
        $validators['file_validate_size'] = [
            Bytes::toNumber($field_settings['max_filesize']),
        ];
    }
    else {
        // Do not validate the file size if it is not set explicitly.
        unset($validators['file_validate_size']);
    }
    // Checks that a file meets the criteria specified by the validators.
    if ($errors = file_validate($file, $validators)) {
        foreach ($errors as $error) {
            $this->context
                ->addViolation($error);
        }
    }
}