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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace generators;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use generators\SimpleXMLElementDecorator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Decorator for SimpleXmlElement library with additional functionality  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @todo: rewrite to support DOMDocument instead of SimpleXmlElement  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                final class XML extends SimpleXMLElementDecorator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Delete linked SimpleXmlElement node when unset XML instance  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function remove()  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        unset($this->getSelf()[0]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Add attribute to xml element  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * If already exists - then update value  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name - name of the attribute  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $value - full value to set  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return XML  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function setAttribute(string $name, string $value): XML  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $attribute = $this->attributes()->{$name}; | 
            
                            
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                        if ($attribute) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $this->attributes()->{$name} = $value; | 
            
            
                                                                        
                            
            
                                    
            
            
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                        } else { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $this->addAttribute($name, $value);  | 
            
                            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return $this;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get attribute value by name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name - name of the attribute  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getAttributeValue(string $name): string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $attribute = $this->attributes()->{$name}; | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $attribute;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Find element by name and replace it with new one  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name - name of the element  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $value - content of the element  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return XML  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function setUniqueChild(string $name, string $value): XML  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $element = $this->getSingleElement($name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!$element) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return new XML($this->addChild($name, $value));  | 
            
                            
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                        } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ($element->getSelf())[0] = $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return $element;  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return array<XML>|null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSingleElement(string $name, string $id = '')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $elements = $this->getElements($name, $id);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $elements ? $elements[0] : null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get elements by name or by name and id  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name - name of elements to find, 'item' for <item>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $id   - id of elements to find, 'main' for <item id="main">  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return array of XML elements  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getElements(string $name, string $id = '')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $elements = $this->xpath('descendant::' . $name . ($id ? '[@id="' . $id . '"]' : '')); | 
            
                            
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                        return array_map(function($element) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return new XML($element);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }, $elements);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSelf()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->simpleXMLElement[0];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.