class RulesOr

class RulesOr extends RulesConditionContainer {
    
    /**
     * @var string
     */
    protected $itemName = 'or';
    public function evaluate(RulesState $state) {
        foreach ($this->children as $condition) {
            if ($condition->evaluate($state)) {
                rules_log('%condition evaluated to %bool.', array(
                    '%condition' => $this->label(),
                    '%bool' => 'TRUE',
                ));
                return !$this->negate;
            }
        }
        rules_log('%condition evaluated to %bool.', array(
            '%condition' => $this->label(),
            '%bool' => 'FALSE',
        ));
        return $this->negate;
    }
    public function label() {
        return !empty($this->label) ? $this->label : ($this->negate ? t('NOT OR') : t('OR'));
    }
    
    /**
     * Overrides RulesContainerPlugin::stateVariables().
     *
     * Overridden to exclude all variable assertions as in an OR we cannot assert
     * the children are successfully evaluated.
     */
    protected function stateVariables($element = NULL) {
        $vars = $this->availableVariables();
        if (isset($element)) {
            // Add in variables provided by siblings executed before the element.
            foreach ($this->children as $child) {
                if ($child === $element) {
                    break;
                }
                $vars += $child->providesVariables();
            }
        }
        return $vars;
    }

}