function RulesLoop::evaluate

Overrides RulesActionContainer::evaluate

File

includes/rules.plugins.inc, line 708

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);
    }
}