protected function AddExpressionForm::getEditedExpression in Rules 8.3

Gets the currently edited expression from the given component.

Parameters

\Drupal\rules\Engine\RulesComponent $component: The component from which to get the expression.

Return value

\Drupal\rules\Engine\ExpressionInterface|null The expression object.

Overrides EditExpressionForm::getEditedExpression

File

src/Form/AddExpressionForm.php, line 71

Class

AddExpressionForm

UI form to add an expression like a condition or action to a rule.

Namespace

Drupal\rules\Form

Code

protected function getEditedExpression(RulesComponent $component) {
  $component_expression = $component
    ->getExpression();
  if (!$component_expression instanceof ExpressionContainerInterface) {
    throw new LogicException('Cannot add expression to expression of type ' . $component_expression
      ->getPluginId());
  }
  if ($this->uuid && ($expression = $component_expression
    ->getExpression($this->uuid))) {
    return $expression;
  }
  else {
    $expression = $this->expressionManager
      ->createInstance($this->expressionId);
    $rule_expression = $component
      ->getExpression();
    $rule_expression
      ->addExpressionObject($expression);
    return $expression;
  }
}