public function RulesLoop::evaluate in Rules 7.2

Evaluate, whereas by default new vars are visible in the parent's scope.

Overrides RulesActionContainer::evaluate

File

includes/rules.plugins.inc, line 708

Contains plugin info and implementations not needed for rule evaluation.

Class

RulesLoop

A loop element.

Code

public function evaluate(RulesState $state) {
  try {
    $param_info = $this
      ->pluginParameterInfo();
    $list = $this
      ->getArgument('list', $param_info['list'], $state);
    $item_var_info = $this
      ->listItemInfo();
    $item_var_name = $this->settings['item:var'];
    if (isset($this->settings['list:select'])) {
      rules_log('Looping over the list items of %selector', array(
        '%selector' => $this->settings['list:select'],
      ), RulesLog::INFO, $this);
    }

    // Loop over the list and evaluate the children for each list item.
    foreach ($list as $key => $item) {

      // Use a separate state so variables are available in the loop only.
      $state2 = clone $state;
      $state2
        ->addVariable($item_var_name, $list[$key], $item_var_info);
      parent::evaluate($state2);

      // Update variables from parent scope.
      foreach ($state->variables as $var_key => &$var_value) {
        if (array_key_exists($var_key, $state2->variables)) {
          $var_value = $state2->variables[$var_key];
        }
      }
    }
  } catch (RulesEvaluationException $e) {
    rules_log($e->msg, $e->args, $e->severity);
    rules_log('Unable to evaluate %name.', array(
      '%name' => $this
        ->getPluginName(),
    ), RulesLog::WARN, $this);
  }
}