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gyro/modules/ajax/view/base/ajaxview.cls.php

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<?php
/**
 * Renders page as Ajax result
 * 
 * In case of an error, the 'error' member gets set in return data.
 * Else member 'result' is set to PageData::ajax_data  
 * 
 * @author Gerd Riesselmann
 * @ingroup Ajax
 */
class AjaxView extends PageViewBase {
        /**
         * Contructor takes the page data
         */     
        public function __construct($page_data) {
                parent::__construct($page_data, '');
        } 
        
        /**
         * Sets content
         * 
         * @param mixed $rendered_content The content rendered
         * @param int $policy If set to IView::DISPLAY, content is printed, if false it is returned only
         * @return void
         */
        protected function render_content(&$rendered_content, $policy) {
                $data = array();
                $is_error = true;
                switch ($this->page_data->status_code) {
                        case ControllerBase::ACCESS_DENIED:
                                $data['error'] = tr('Access denied', 'core');
                                break;
                        case ControllerBase::NOT_FOUND:
                                $data['error'] = tr('Page not found', 'core');
                                break;
                        case ControllerBase::INTERNAL_ERROR:
                                $data['error'] = tr('Server error', 'core');
                                break;
                        default:
                                if ($this->page_data->status instanceof Status && $this->page_data->status->is_error()) {
                                        $is_error = true;
                                        $data['error'] = $this->page_data->status->to_string(Status::OUTPUT_PLAIN);
                                }       
                                else {
                                        $is_error = false;
                                        $data['result'] = $this->page_data->ajax_data;
                                }
                                break;
                } 
                $data['is_error'] = $is_error;
                $rendered_content = ConverterFactory::encode($data, CONVERTER_JSON);
        }

        protected function after_render(&$rendered_content, $policy) {
                // Do nothing here
        }

        /**
         * Assign variables
         * 
         * @param int $policy If set to IView::DISPLAY, content is printed, if false it is returned only
         */
        protected function assign_default_vars($policy) {
                // Do nothing here      
        }
        
        /**
         * Returns true, if cache should be used
         *
         * @return bool
         */
        protected function should_cache() {
                return false;
        }       
        
        /**
         * Called after content is rendered, always
         * 
         * @param mixed $rendered_content The content rendered
         * @paramint $policy If set to IView::DISPLAY, content is printed, if false it is returned only
         * @return void
         */
        protected function render_postprocess(&$rendered_content, $policy) {
                $this->send_status();
                
                if (!Common::flag_is_set($policy, self::CONTENT_ONLY)) {
                        header('Cache-Control: maxage=3600'); //Fix for IE in SSL 
                        header('Pragma: public');
                        //header('Content-Length: ') . strlen($rendered_content);                       
                        header('Content-Type: application/json');
                }
        }       
}
?>

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