/**
* Executes a rules expression.
*/
public function execute()
{
// If there is no state given, we have to assume no required context.
$state = ExecutionState::create();
$result = $this->executeWithState($state);
// Save specifically registered variables in the end after execution.
$state->autoSave();
return $result;
}
/**
* 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)
{
// Load reaction rule config entities by $event_name.
$storage = $this->entityTypeManager->getStorage('rules_reaction_rule');
// @todo Only load active reaction rules here.
$configs = $storage->loadByProperties(['event' => $event_name]);
// Set up an execution state with the event context.
$event_definition = $this->eventManager->getDefinition($event_name);
$state = ExecutionState::create();
foreach ($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, $value);
}
// Loop over all rules and execute them.
foreach ($configs as $config) {
/** @var \Drupal\rules\Entity\ReactionRuleConfig $config */
$config->getExpression()->executeWithState($state);
}
$state->autoSave();
}
/**
* 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();
}
/**
* Tests that multiple actions can consume and provide context variables.
*/
public function testActionProvidedContext()
{
// @todo: Convert the test to make use of actions instead of conditions.
$rule = $this->expressionManager->createRule();
// The condition provides a "provided_text" variable.
$rule->addCondition('rules_test_provider');
// The action provides a "concatenated" variable.
$rule->addAction('rules_test_string', ContextConfig::create()->map('text', 'provided_text'));
// Add the same action again which will provide a "concatenated2" variable
// now.
$rule->addAction('rules_test_string', ContextConfig::create()->map('text', 'concatenated')->provideAs('concatenated', 'concatenated2'));
$state = ExecutionState::create();
$rule->executeWithState($state);
// Check that the created variables exists and have the provided values.
$concatenated = $state->getVariable('concatenated');
$this->assertEqual($concatenated->getValue(), 'test valuetest value');
$concatenated2 = $state->getVariable('concatenated2');
$this->assertEqual($concatenated2->getValue(), 'test valuetest valuetest valuetest value');
}
/**
* Executes the component with the given values.
*
* @param mixed[] $arguments
* The array of arguments; i.e., an array keyed by name of the defined
* context and the context value as argument.
*
* @return mixed[]
* The array of provided context values, keyed by context name.
*
* @throws \LogicException
* Thrown if the context is not defined.
* @throws \Drupal\rules\Exception\RulesEvaluationException
* Thrown if the Rules expression triggers errors during execution.
*/
public function executeWithArguments(array $arguments)
{
$this->state = ExecutionState::create();
foreach ($arguments as $name => $value) {
$this->setContextValue($name, $value);
}
return $this->execute();
}
