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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                declare(strict_types=1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Romm\Formz\Middleware\Item\Step;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Form\Definition\Step\Step\Step;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Form\FormObject\FormObjectFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Form\FormObject\Service\FormObjectSteps;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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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\Item\Step\Service\StepMiddlewareService;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Processor\PresetMiddlewareInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Romm\Formz\Middleware\Signal\After;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class SubstepFetchingMiddleware extends AbstractMiddleware implements After, FormInjectionSignal, PresetMiddlewareInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var int  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $priority = self::PRIORITY_STEP_FETCHING + 150;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var Step  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $currentStep;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var StepMiddlewareService  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $service;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var FormObjectSteps  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $stepService;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Inject the step service.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function initializeMiddleware()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->service = StepMiddlewareService::get();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Arguments $arguments  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function after(Arguments $arguments)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if ($this->getFormObject()->formWasSubmitted()) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            return;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $formObject = $this->getFormObject();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if (false === $formObject->getDefinition()->hasSteps()) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            return;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->currentStep = $this->getCurrentStep();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if (null === $this->currentStep  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            || false === $this->currentStep->hasSubsteps()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            return;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->stepService = FormObjectFactory::get()->getStepService($formObject);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->fetchCurrentSubstep();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Fetches the current substep that should be displayed (the first  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * substep(s) may have an activation condition).  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function fetchCurrentSubstep()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->service->reset($this->getFormObject(), $this->getRequest());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $substepDefinition = $this->service->findFirstSubstepDefinition($this->currentStep);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->stepService->setCurrentSubstepDefinition($substepDefinition);  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: