/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state)
{
foreach ($this->entity->getEventNames() as $key => $event_name) {
$event_definition = $this->eventManager->getDefinition($event_name);
$form['event'][$key] = ['#type' => 'item', '#title' => $this->t('Events:'), '#markup' => $this->t('@label (@name)', ['@label' => $event_definition['label'], '@name' => $event_name])];
}
$form = $this->rulesUiHandler->getForm()->buildForm($form, $form_state);
return parent::form($form, $form_state);
}
/**
* Returns a list of event names that are used by active reaction rules.
*
* @return string[]
* The list of event names keyed by event name.
*/
protected function getRegisteredEvents()
{
$events = [];
foreach ($this->loadMultiple() as $rules_config) {
foreach ($rules_config->getEventNames() as $event_name) {
$event_name = $this->eventManager->getEventBaseName($event_name);
if (!isset($events[$event_name])) {
$events[$event_name] = $event_name;
}
}
}
return $events;
}
/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state)
{
$form = parent::form($form, $form_state);
$event_definitions = $this->eventManager->getGroupedDefinitions();
$options = [];
foreach ($event_definitions as $group => $definitions) {
foreach ($definitions as $id => $definition) {
$options[$group][$id] = $definition['label'];
}
}
$form['events']['#tree'] = TRUE;
$form['events'][]['event_name'] = ['#type' => 'select', '#title' => $this->t('React on event'), '#options' => $options, '#required' => TRUE, '#description' => $this->t('Whenever the event occurs, rule evaluation is triggered.')];
return $form;
}
/**
* Reacts on the given event and invokes configured reaction rules.
*
* @param \Symfony\Component\EventDispatcher\Event $event
* The event object containing context for the event.
* @param string $event_name
* The event name.
*/
public function onRulesEvent(Event $event, $event_name)
{
$storage = $this->entityTypeManager->getStorage('rules_reaction_rule');
// Get event metadata and the to be triggered events.
$event_definition = $this->eventManager->getDefinition($event_name);
$handler_class = $event_definition['class'];
$triggered_events = [$event_name];
if (is_subclass_of($handler_class, RulesConfigurableEventHandlerInterface::class)) {
$qualified_event_suffixes = $handler_class::determineQualifiedEvents($event, $event_name, $event_definition);
foreach ($qualified_event_suffixes as $qualified_event_suffix) {
$triggered_events[] = "{$event_name}--{$qualified_event_suffix}";
}
}
// Setup the execution state.
$state = ExecutionState::create();
foreach ($event_definition['context'] as $context_name => $context_definition) {
// If this is a GenericEvent get the context for the rule from the event
// arguments.
if ($event instanceof GenericEvent) {
$value = $event->getArgument($context_name);
} else {
$value = $event->{$context_name};
}
$state->setVariable($context_name, $context_definition, $value);
}
// Invoke the rules.
// @todo: Improve this by cloning the state after each rule, such that added
// variables added by one rule are not interfering with the variables of
// another rule.
foreach ($triggered_events as $triggered_event) {
// @todo Only load active reaction rules here.
$configs = $storage->loadByProperties(['events.*.event_name' => $triggered_event]);
// Loop over all rules and execute them.
foreach ($configs as $config) {
/** @var \Drupal\rules\Entity\ReactionRuleConfig $config */
$config->getExpression()->executeWithState($state);
}
}
$state->autoSave();
}