<?php

#require_once LIBRARY.'modules/controller.php';

class XmlHttpController extends Controller {
    
    private $request;
    private $response;
    
    public function process() {
        
        RootController::setOutputModuleOnly(true);
        
        $rawPostData = file_get_contents('php://input'); # get raw post data (json), i.e: {"ding":"hallo","xyz":123}
        $this->request = json_decode($rawPostData);            # convert to php object
        
        $this->response = new stdClass();
        $this->response->error = null;
        $this->response->result = null;
        
        $this->response->request = $this->request;
        //$respone->postData = $postData;
        
        if ($this->request !== null) {
            if ($this->requestField('action')) {
                if ($this->requestFieldValueIs('action', 'change_listConfig')) {
                    if ($this->requestField('listModule')) {
                        if ($this->requestFieldValueIs('configField', 'sortField')) {
                            $currentSortField = Session::getInstance()->getListConfig('sortField', null, $this->request->listModule);
                            $currentSortMode  = Session::getInstance()->getListConfig('sortMode', null, $this->request->listModule);
                            # toggle sortMode if sortField not changed
                            if        ($this->requestFieldValueIs('configValue', $currentSortField)  &&  $currentSortMode == 'ASC'  ) {
                                Session::getInstance()->setListConfig('sortMode', 'DESC', $this->request->listModule);
                            } else if ($this->requestFieldValueIs('configValue', $currentSortField)  &&  $currentSortMode == 'DESC'  ) {
                                Session::getInstance()->setListConfig('sortMode', 'ASC', $this->request->listModule);
                            }
                            # change sortField, use ASC for sortMode
                            else {
                                Session::getInstance()->setListConfig('sortField', $this->request->configValue, $this->request->listModule);
                                Session::getInstance()->setListConfig('sortMode', 'ASC', $this->request->listModule);
                            }
                            $this->response->result = 'ok';
                        }# else { $this->response->error = 'no sortField specified.';
                        #}
                    } else { $this->response->error = 'no listModule specified.';
                    }
                } else { $this->response->error = 'unkown action specified.';
                }
            } else { $this->response->error = 'no action specified.';
            }
        } else { $this->response->error = 'decoding json request failed.';
        }
        
        $json = json_encode($this->response);
        print_r($json);
    }
    
    private function requestFieldValueIs($prop, $val) {
        if (isset($this->request->$prop)) {
            if ($this->request->$prop === $val) {
                return true;
            }
        }
        return false;
    }
    
    private function requestField($prop) {
        if (isset($this->request->$prop)) {
            return true;
        }
        return false;
    }
    
}