function RulesReactionRule::availableVariables

File

includes/rules.plugins.inc, line 500

Class

RulesReactionRule

Represents rules getting triggered by events.

Code

public function availableVariables() {
  if (!isset($this->availableVariables)) {
    if (isset($this->parent)) {
      // Return the event variables provided by the event set, once cached.
      $this->availableVariables = $this->parent
        ->stateVariables();
    }
    else {
      // The intersection of the variables provided by the events are
      // available.
      foreach ($this->events as $event_name) {
        $handler = rules_get_event_handler($event_name, $this->getEventSettings($event_name));
        if (isset($this->availableVariables)) {
          $event_vars = $handler->availableVariables();
          // Merge variable info by intersecting the variable-info keys also,
          // so we have only metadata available that is valid for all of the
          // provided variables.
          foreach (array_intersect_key($this->availableVariables, $event_vars) as $name => $variable_info) {
            $this->availableVariables[$name] = array_intersect_key($variable_info, $event_vars[$name]);
          }
        }
        else {
          $this->availableVariables = $handler->availableVariables();
        }
      }
      $this->availableVariables = isset($this->availableVariables) ? RulesState::defaultVariables() + $this->availableVariables : RulesState::defaultVariables();
    }
  }
  return $this->availableVariables;
}