| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * This file is part of the rybakit/twig-deferred-extension package. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * (c) Eugene Leonovich <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * For the full copyright and license information, please view the LICENSE | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * file that was distributed with this source code. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | declare(strict_types=1); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | namespace Twig\DeferredExtension; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  | use Twig\Extension\AbstractExtension; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | use Twig\Template; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | final class DeferredExtension extends AbstractExtension | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |     private $blocks = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     public function getTokenParsers() : array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |         return [new DeferredTokenParser()]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |     public function getNodeVisitors() : array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |         return [new DeferredNodeVisitor()]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |     public function defer(Template $template, string $blockName) : void | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |         $templateName = $template->getTemplateName(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |         $this->blocks[$templateName][] = $blockName; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |         \ob_start(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 39 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 40 |  |  |     public function resolve(Template $template, array $context, array $blocks) : void | 
            
                                                        
            
                                    
            
            
                | 41 |  |  |     { | 
            
                                                        
            
                                    
            
            
                | 42 |  |  |         $templateName = $template->getTemplateName(); | 
            
                                                        
            
                                    
            
            
                | 43 |  |  |         if (empty($this->blocks[$templateName])) { | 
            
                                                        
            
                                    
            
            
                | 44 |  |  |             return; | 
            
                                                        
            
                                    
            
            
                | 45 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 46 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 47 |  |  |         while ($blockName = \array_pop($this->blocks[$templateName])) { | 
            
                                                        
            
                                    
            
            
                | 48 |  |  |             $buffer = \ob_get_clean(); | 
            
                                                        
            
                                    
            
            
                | 49 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 50 |  |  |             $blocks[$blockName] = [$template, 'block_'.$blockName.'_deferred']; | 
            
                                                        
            
                                    
            
            
                | 51 |  |  |             $template->displayBlock($blockName, $context, $blocks); | 
            
                                                        
            
                                    
            
            
                | 52 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 53 |  |  |             echo $buffer; | 
            
                                                        
            
                                    
            
            
                | 54 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 55 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 56 |  |  |         if ($parent = $template->getParent($context)) { | 
            
                                                        
            
                                    
            
            
                | 57 |  |  |             $this->resolve($parent, $context, $blocks); | 
                            
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                | 58 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 59 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 60 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 61 |  |  |  | 
            
                        
If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
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