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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace MaxBeckers\AmazonAlexa\Response\Directives\Display;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use MaxBeckers\AmazonAlexa\Helper\SerializeValueMapper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Maximilian Beckers <[email protected]>  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                class Template implements \JsonSerializable  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    use SerializeValueMapper;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const BACK_BUTTON_MODE_HIDDEN  = 'HIDDEN';  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const BACK_BUTTON_MODE_VISIBLE = 'VISIBLE';  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var string|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $type;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var string|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $token;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var string|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $backButton;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var Image|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $backgroundImage;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var string|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $title;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var TextContent|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $textContent;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var Image|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $image;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var ListItem[]  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $listItems = [];  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param ListItem $item  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function addListItem(ListItem $item)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->listItems[] = $item;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string|null      $type  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string|null      $token  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string|null      $backButton  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string|null      $backgroundImage  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string|null      $title  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param TextContent|null $textContent  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param Image|null       $image  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param ListItem[]       $listItems  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return Template  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public static function create($type, $token, $backButton = self::BACK_BUTTON_MODE_VISIBLE, $backgroundImage = null, $title = null, $textContent = null, $image = null, $listItems = []): self  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template = new self();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->type            = $type;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->token           = $token;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->backButton      = $backButton;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->backgroundImage = $backgroundImage;  | 
            
                            
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                        $template->title           = $title;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->textContent     = $textContent;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->image           = $image;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $template->listItems       = $listItems;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return $template;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function jsonSerialize()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $data = new \ArrayObject();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'type');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'token');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'backButton');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'backgroundImage');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'title');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'textContent');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->valueToArrayIfSet($data, 'image');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!empty($this->listItems)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $data['listItems'] = $this->listItems;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $data;  | 
            
            
                                                                        
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                                        
                                                                
            
                                    
            
            
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Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly.
For example, imagine you have a variable
$accountIdthat can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to theidproperty of an instance of theAccountclass. This class holds a proper account, so the id value must no longer be false.Either this assignment is in error or a type check should be added for that assignment.