/**
* {@inheritdoc}
*/
public function process($value, ExecutionStateInterface $rules_state)
{
$data = [];
$placeholders_by_data = $this->placeholderResovler->scan($value);
foreach ($placeholders_by_data as $variable_name => $placeholders) {
// Note that accessing an unavailable variable will throw an evaluation
// exception. That's exactly what needs to happen. Invalid tokens must
// be checked when checking integrity.
$data[$variable_name] = $rules_state->getVariable($variable_name);
}
return $this->placeholderResovler->replacePlaceHolders($value, $data);
}
/**
* Maps provided context values from the plugin to the Rules state.
*
* @param ContextProviderInterface $plugin
* The plugin where the context values are extracted.
* @param \Drupal\rules\Engine\ExecutionStateInterface $state
* The Rules state where the context variables are added.
*/
protected function mapProvidedContext(ContextProviderInterface $plugin, ExecutionStateInterface $state)
{
$provides = $plugin->getProvidedContextDefinitions();
foreach ($provides as $name => $provided_definition) {
// Avoid name collisions in the rules state: provided variables can be
// renamed.
if (isset($this->configuration['provides_mapping'][$name])) {
$state->setVariableData($this->configuration['provides_mapping'][$name], $plugin->getProvidedContext($name)->getContextData());
} else {
$state->setVariableData($name, $plugin->getProvidedContext($name)->getContextData());
}
}
}
/**
* {@inheritdoc}
*/
public function executeWithState(ExecutionStateInterface $state)
{
$list_data = $state->fetchDataByPropertyPath($this->configuration['list']);
// Use a configured list item variable name, otherwise fall back to just
// 'list_item' as variable name.
$list_item_name = isset($this->configuration['list_item']) ? $this->configuration['list_item'] : 'list_item';
foreach ($list_data as $item) {
$state->setVariableData($list_item_name, $item);
foreach ($this->actions as $action) {
$action->executeWithState($state);
}
}
// After the loop the list item is out of scope and cannot be used by any
// following actions.
$state->removeVariable($list_item_name);
}
/**
* Executes the component with the previously set context.
*
* @return mixed[]
* The array of provided context values, keyed by context name.
*
* @throws \Drupal\rules\Exception\RulesEvaluationException
* Thrown if the Rules expression triggers errors during execution.
*/
public function execute()
{
$this->expression->executeWithState($this->state);
$this->state->autoSave();
$result = [];
foreach ($this->providedContext as $name) {
$result[$name] = $this->state->getVariableValue($name);
}
return $result;
}
/**
* Adds provided context values from the plugin to the execution state.
*
* @param CoreContextAwarePluginInterface $plugin
* The context aware plugin of which to add provided context.
* @param \Drupal\rules\Engine\ExecutionStateInterface $state
* The Rules state where the context variables are added.
*/
protected function addProvidedContext(CoreContextAwarePluginInterface $plugin, ExecutionStateInterface $state)
{
// If the plugin does not support providing context, there is nothing to do.
if (!$plugin instanceof ContextProviderInterface) {
return;
}
$provides = $plugin->getProvidedContextDefinitions();
foreach ($provides as $name => $provided_definition) {
// Avoid name collisions in the rules state: provided variables can be
// renamed.
if (isset($this->configuration['provides_mapping'][$name])) {
$state->setVariableData($this->configuration['provides_mapping'][$name], $plugin->getProvidedContext($name)->getContextData());
} else {
$state->setVariableData($name, $plugin->getProvidedContext($name)->getContextData());
}
}
}