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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Jasny\Controller\View;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Http\Message\ServerRequestInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Http\Message\ResponseInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * View using Twig  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                trait Twig  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Twig environment  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var \Twig_Environment  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $twig = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get server request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return ServerRequestInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract public function getRequest();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get server response  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return ResponseInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract public function getResponse();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Add a global variable to the view.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name   Variable name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param mixed  $value  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return $this  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function setViewVariable($name, $value)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if (!$name) throw new \InvalidArgumentException("Name should not be empty");         | 
            
                            
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                        $this->getTwig()->addGlobal($name, $value);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return $this;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Expose a function to the view.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $function  Variable name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param mixed  $callback  | 
            
                            
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                     * @param string $as        'function' or 'filter'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return $this  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function setViewFunction($name, $function = null, $as = 'function')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($as === 'function') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->getTwig()->addFunction($this->createTwigFunction($name, $function));  | 
            
                            
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                        } elseif ($as === 'filter') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->getTwig()->addFilter($this->createTwigFilter($name, $function));  | 
            
                            
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                        } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            throw new \InvalidArgumentException("You should create either function or filter, not '$as'"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Add extension to view  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param object $extension  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return $this  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function setViewExtension($extension)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->getTwig()->addExtension($extension);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * View rendered template  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name   Template name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $context Template context  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return ResponseInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function view($name, array $context = [])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!pathinfo($name, PATHINFO_EXTENSION)) $name .= '.html.twig';  | 
            
                            
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                        $twig = $this->getTwig();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $tmpl = $twig->loadTemplate($name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $response = $this->getResponse();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $response = $response->withHeader('Content-Type', 'text/html; charset=' . $twig->getCharset()); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $response->getBody()->write($tmpl->render($context));              | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $response;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get twig environment  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Twig_Environment  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getTwig()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->twig) return $this->twig;  | 
            
                            
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                        $loader = $this->getTwigLoader();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->twig = $this->getTwigEnvironment($loader);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $extensions = ['DateExtension', 'PcreExtension', 'TextExtension', 'ArrayExtension'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach ($extensions as $name) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $class = "Jasny\Twig\\$name";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (class_exists($class)) $this->setViewExtension(new $class());  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $uri = $this->getRequest()->getUri()->getPath();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->setViewVariable('current_url', $uri); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->twig;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get twig loasder for current working directory  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Twig_Loader_Filesystem  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getTwigLoader()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                        return new \Twig_Loader_Filesystem(getcwd());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                     * Get twig environment instance  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                     * @param \Twig_Loader_Filesystem $loader  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                     * @return \Twig_Environment  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                    public function getTwigEnvironment(\Twig_Loader_Filesystem $loader)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                        return new \Twig_Environment($loader);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                     * Create twig function  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                     * @param string $name          Name of function in view  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                     * @param callable $function   | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                     * @return \Twig_SimpleFunction  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                    public function createTwigFunction($name, $function)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                        if (!$name) throw new \InvalidArgumentException("Function name should not be empty"); | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                        return new \Twig_SimpleFunction($name, $function ?: $name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    161
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    162
                 | 
                                    
                                                     | 
                
                 | 
                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    163
                 | 
                                    
                                                     | 
                
                 | 
                     * Create twig filter  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    164
                 | 
                                    
                                                     | 
                
                 | 
                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    165
                 | 
                                    
                                                     | 
                
                 | 
                     * @param string $name          Name of filter in view  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    166
                 | 
                                    
                                                     | 
                
                 | 
                     * @param callable $function   | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    167
                 | 
                                    
                                                     | 
                
                 | 
                     * @return \Twig_SimpleFilter  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    168
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    169
                 | 
                                    
                                                     | 
                
                 | 
                    public function createTwigFilter($name, $function)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    170
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    171
                 | 
                                    
                                                     | 
                
                 | 
                        if (!$name) throw new \InvalidArgumentException("Filter name should not be empty"); | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    172
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    173
                 | 
                                    
                                                     | 
                
                 | 
                        return new \Twig_SimpleFilter($name, $function ?: $name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    174
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    175
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    176
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
Adding braces to control structures avoids accidental mistakes as your code changes: