function AllowedValuesConstraintValidator::validate

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php, line 50

Class

AllowedValuesConstraintValidator

Validates the AllowedValues constraint.

Namespace

Code

public function validate($value, Constraint $constraint) {
    $typed_data = $this->getTypedData();
    if ($typed_data instanceof OptionsProviderInterface) {
        $allowed_values = $typed_data->getSettableValues($this->currentUser);
        $constraint->choices = $allowed_values;
        // If the data is complex, we have to validate its main property.
        if ($typed_data instanceof ComplexDataInterface) {
            $name = $typed_data->getDataDefinition()
                ->getMainPropertyName();
            if (!isset($name)) {
                throw new \LogicException('Cannot validate allowed values for complex data without a main property.');
            }
            $typed_data = $typed_data->get($name);
            $value = $typed_data->getValue();
        }
    }
    // The parent implementation ignores values that are not set, but makes
    // sure some choices are available firstly. However, we want to support
    // empty choices for undefined values; for instance, if a term reference
    // field points to an empty vocabulary.
    if (!isset($value)) {
        return;
    }
    // Get the value with the proper datatype in order to make strict
    // comparisons using in_array().
    if (!$typed_data instanceof PrimitiveInterface) {
        throw new \LogicException('The data type must be a PrimitiveInterface at this point.');
    }
    $value = $typed_data->getCastedValue();
    // In a better world where typed data just returns typed values, we could
    // set a constraint callback to use the OptionsProviderInterface.
    // This is not possible right now though because we do the typecasting
    // further down.
    if ($constraint->callback) {
        if (!\is_callable($choices = [
            $this->context
                ->getObject(),
            $constraint->callback,
        ]) && !\is_callable($choices = [
            $this->context
                ->getClassName(),
            $constraint->callback,
        ]) && !\is_callable($choices = $constraint->callback)) {
            throw new ConstraintDefinitionException('The AllowedValuesConstraint constraint expects a valid callback');
        }
        $allowed_values = \call_user_func($choices);
        $constraint->choices = $allowed_values;
        // parent::validate() does not need to invoke the callback again.
        $constraint->callback = NULL;
    }
    // Force the choices to be the same type as the value.
    $type = gettype($value);
    foreach ($constraint->choices as &$choice) {
        settype($choice, $type);
    }
    parent::validate($value, $constraint);
}