actions/ajax_set_preference.php

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<?php
class dataface_actions_ajax_set_preference {
        function handle(&$params){
                $app =& Dataface_Application::getInstance();
                $record =& $app->getRecord();
                $out = array();
                if ( !isset($_POST['--name']) ){
                        $out['error'] = 'No name specified';
                        $this->respond($out);
                        exit;
                }
                
                if ( !isset($_POST['--value']) ){
                        $out['error'] = 'No value specified';
                        $this->respond($out);
                        exit;
                }
                
                if ( isset($_POST['--record_id']) ){
                        $recordid = $_POST['--record_id'];
                } else {
                        $recordid = $recordd->getId();
                }
                
                import('Dataface/PreferencesTool.php');
                $pt =& Dataface_PreferencesTool::getInstance();
                
                $pt->savePreference($recordid, $_POST['--name'], $_POST['--value']);
                $out['message'] = 'Successfully saved preference '.$_POST['--name'].' to '.$_POST['--value'].' for '.$recordid;
                $this->respond($out);
                
        }
        
        function respond($out){
                import('Services/JSON.php');
                $json = new Services_JSON;
                
                header('Content-type: text/json');
                echo $json->encode($out);
                exit;
                
        }
}