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contributions/deletedialog/controller/deletedialog.controller.php

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<?php
/**
 * This controller catches delete commands
 * 
 * @author Gerd Riesselmann
 * @ingroup DeleteDialog
 */
class DeleteDialogController extends ControllerBase {
        /**
         * returns array of routes
         * 
         * @return array 
         */
        public function get_routes() {
                $ret = array(
                        new CommandsRoute('https://process_commands/{model:s}/{id:ui>}/delete', $this, 'deletedialog_cmd_handler'),
                        new ParameterizedRoute('https://deletedialog/approve/{_model_:s}/{id:ui>}', $this, 'deletedialog_approve'),                     
                        
                        new CommandsRoute('https://process_commands/{model:s}/{id:ui>}/status/DELETED', $this, 'deletedialog_status_cmd_handler'),                                                              
                        new ParameterizedRoute('https://deletedialog/approve/status/{_model_:s}/{id:ui>}', $this, 'deletedialog_approve_status'),
                );
                return $ret;
        }
        
        /**
         * Handle the command, that is: Display an approval dialog
         *
         * @param PageData $page_data
         * @param string $model
         * @param string $id
         */
        public function action_deletedialog_status_cmd_handler(PageData $page_data, $model, $id) {
                $page_data->in_history = false;
                $dao = $this->get_instance($model, $id);
                if ($dao === false) {
                        return CONTROLLER_NOT_FOUND;
                }
                Url::create(ActionMapper::get_url('deletedialog_approve_status', $dao))->redirect();
        }

        /**
         * Handle link approval
         *
         * @param PageData $page_data
         * @param string $_model_
         * @param string $id
         */
        public function action_deletedialog_approve_status(PageData $page_data, $_model_, $id) {
                $page_data->in_history = false;
                
                $dao = $this->get_instance($_model_, $id);
                if ($dao === false) {
                        return CONTROLLER_NOT_FOUND;
                }
                
                $cmd = CommandsFactory::create_command($dao, 'status', 'DELETED');
                if (!$cmd->can_execute(false)) {
                        return CONTROLLER_ACCESS_DENIED;
                }
                
                $formhandler = $this->create_formhandler();
                if ($page_data->has_post_data()) {
                        $err = $formhandler->validate();
                        if ($err->is_ok()) {
                                if ($page_data->get_post()->get_item('cancel', false) !== false) {
                                        $err = new Message(tr('Deletion has been canceled by user', 'deletedialog'));
                                }
                                else {
                                        $err->merge($cmd->execute());
                                }
                        }
                        $instance_string = 'instance';
                        $instance = $dao->get_table_name();
                        $instance_string =  substr($instance, 0, strlen($instance)-1);
                        $formhandler->finish($err, tr('The '.$instance_string.' has been deleted', 'deletedialog'));
                }
                else {
                        $this->render_view_status($page_data, $formhandler, $dao);      
                }
        }
        
        
        /**
         * HAndle the command, that is: Display an approval dialog
         *
         * @param PageData $page_data
         * @param string $model
         * @param string $id
         */
        public function action_deletedialog_cmd_handler(PageData $page_data, $model, $id) {
                $page_data->in_history = false;
                $dao = $this->get_instance($model, $id);
                if ($dao === false) {
                        return CONTROLLER_NOT_FOUND;
                }
                
                Url::create(ActionMapper::get_url('deletedialog_approve', $dao))->redirect();
        }

        /**
         * Handle link approval
         *
         * @param PageData $page_data
         * @param string $_model_
         * @param string $id
         */
        public function action_deletedialog_approve(PageData $page_data, $_model_, $id) {
                $page_data->in_history = false;
                
                $dao = $this->get_instance($_model_, $id);
                if ($dao === false) {
                        return CONTROLLER_NOT_FOUND;
                }
                
                $cmd = CommandsFactory::create_command($dao, 'delete', false);
                if (!$cmd->can_execute(false)) {
                        return CONTROLLER_ACCESS_DENIED;
                }
                
                $formhandler = $this->create_formhandler();
                if ($page_data->has_post_data()) {
                        $err = $formhandler->validate();
                        if ($err->is_ok()) {
                                if ($page_data->get_post()->get_item('cancel', false) !== false) {
                                        $err = new Message(tr('Deletion has been canceled by user', 'deletedialog'));
                                }
                                else {
                                        $err->merge($cmd->execute());
                                }
                        }
                        $formhandler->finish($err, tr('The instance has been deleted', 'deletedialog'));
                }
                else {
                        $this->render_view($page_data, $formhandler, $dao);     
                }
        }
        
        /**
         * Returns instance passed as coded string
         *
         * @param string $model
         * @param string $id
         * @return IDataObject
         */
        protected function get_instance($model, $id) {
                $ret = false;
                $dao = DB::create($model);
                if (!empty($dao)) {
                        $arr_id = explode(GYRO_COMMAND_ID_SEP, $id);
                        foreach ($dao->get_table_keys() as $key => $field) {
                                $dao->$key = array_shift($arr_id);
                        }
                        
                        if ($dao->find(IDataObject::AUTOFETCH) == 1) {
                                // Not zero or many items
                                $ret = $dao;                                    
                        }
                }
                return $ret;
        }
        
        /**
         * Create a formhandler
         *
         * @return FormHandler
         */
        protected function create_formhandler() {
                Load::tools('formhandler');
                return new FormHandler('dlgdeleteapprove');             
        }
        
        /**
         * Create an render approval view
         *
         * @param FormHandler $formhandler
         * @param IDataObject $instance
         */
        protected function render_view(PageData $page_data, FormHandler $formhandler, $instance) {
                $view = ViewFactory::create_view(IViewFactory::CONTENT, 'deletedialog/approve', $page_data);
                $formhandler->prepare_view($view);
                $view->assign('instance', $instance); 
                $view->render();                
        }
        
        /**
         * Create an render approval view
         *
         * @param FormHandler $formhandler
         * @param IDataObject $instance
         */
        protected function render_view_status(PageData $page_data, FormHandler $formhandler, $instance) {
                $view = ViewFactory::create_view(IViewFactory::CONTENT, 'deletedialog/approve_status', $page_data);
                $formhandler->prepare_view($view);
                $view->assign('instance', $instance); 
                $view->render();                
        }
        
}

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