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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * 2017 Romain CANON <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the TYPO3 FormZ project.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * It is free software; you can redistribute it and/or modify it  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * under the terms of the GNU General Public License, either  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * version 3 of the License, or any later version.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, see:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * http://www.gnu.org/licenses/gpl-3.0.html  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Romm\Formz\Middleware\Item\Persistence;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Domain\Model\FormMetadata;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Domain\Repository\FormMetadataRepository;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Argument\Arguments;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Item\AbstractMiddleware;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Item\FormInjection\FormInjectionSignal;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Signal\Before;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\State\PresetMiddlewareInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This middleware will try to fetch a form instance using the persistence  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * manager.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * If a form identifier hash is found in the request arguments, it is used to  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * search for a form instance in every persistence service bound to the form  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * object.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class PersistenceFetchingMiddleware extends AbstractMiddleware implements Before, FormInjectionSignal, PresetMiddlewareInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var \Romm\Formz\Middleware\Item\Persistence\PersistenceFetchingMiddlewareOption  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $options;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var FormMetadata  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $metadata;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var FormMetadataRepository  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $metadataRepository;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Checks for a form identifier hash in the request arguments, and tries to  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * get a form identifier object with it.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function initializeMiddleware()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $hash = $this->getFormHash();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($hash) { | 
            
                            
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                            $this->metadata = $this->metadataRepository->findOneByHash($hash);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ($this->metadata  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                && $this->metadata->getClassName() !== $this->getFormObject()->getClassName()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $this->metadata = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (!$this->metadata) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                // @todo forward  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $action = $this->options->getForwardToActionOnHashError();  | 
            
                            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @see PersistenceFetchingMiddleware  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Arguments $arguments  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function before(Arguments $arguments)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->metadata  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            && false === $this->getFormObject()->formWasSubmitted()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $formObject = $this->getFormObject();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $form = $formObject->getPersistenceManager()->fetchFirst($this->metadata);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ($form) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $formObject->setForm($form);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $formObject->setMetadata($this->metadata);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * This function tries to fetch the form identifier hash for the current  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * form, in the request arguments.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string|null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getFormHash()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->getRequest()->hasArgument('fz-hash')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $formName = $this->getFormObject()->getName();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $identifierList = $this->getRequest()->getArgument('fz-hash'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (is_array($identifierList)  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                                && isset($identifierList[$formName])  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                return (string)$identifierList[$formName];  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param FormMetadataRepository $metadataRepository  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function injectMetadataRepository(FormMetadataRepository $metadataRepository)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->metadataRepository = $metadataRepository;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: