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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Equip\Auth;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Http\Message\ResponseInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Http\Message\ServerRequestInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Equip\Auth\AdapterInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Equip\Auth\Credentials\ExtractorInterface as CredentialsExtractor;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Equip\Auth\Token\ExtractorInterface as TokenExtractor;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Equip\Auth\Exception\UnauthorizedException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class AuthHandler  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const TOKEN_ATTRIBUTE = 'spark/auth:token';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var \Equip\Auth\Token\ExtractorInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $token;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var \Equip\Auth\Credentials\ExtractorInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $credentials;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var AdapterInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $adapter;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var RequestFilterInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $filter;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param \Equip\Auth\Token\ExtractorInterface $token  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param \Equip\Auth\Credentials\ExtractorInterface $credentials  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param AdapterInterface $adapter  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param RequestFilterInterface $filter  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        TokenExtractor $token,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        CredentialsExtractor $credentials,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        AdapterInterface $adapter,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        RequestFilterInterface $filter = null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->token = $token;  | 
            
                            
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                        $this->credentials = $credentials;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->adapter = $adapter;  | 
            
                            
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                        $this->filter = $filter;  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ServerRequestInterface $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ResponseInterface $response  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param callable $next  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return array  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __invoke(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ServerRequestInterface $request,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ResponseInterface $response,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        callable $next  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->shouldFilter($request)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ($token = $this->token->getToken($request)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $authToken = $this->adapter->validateToken($token);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } elseif ($credentials = $this->credentials->getCredentials($request)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $authToken = $this->adapter->validateCredentials($credentials);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                throw new UnauthorizedException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $request = $this->handleToken($request, $authToken);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $next($request, $response);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Handle the Token and put it in the request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ServerRequestInterface $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Token $token  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return ServerRequestInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function handleToken(ServerRequestInterface $request, Token $token)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $request->withAttribute(static::TOKEN_ATTRIBUTE, $token);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ServerRequestInterface $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return boolean  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    protected function shouldFilter(ServerRequestInterface $request)  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        if (!$this->filter) { | 
            
            
                                                        
            
                                    
            
            
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                            return true;  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        return call_user_func($this->filter, $request);  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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This check looks for multiple assignments in successive lines of code. It will report an issue if the operators are not in a straight line.
To visualize
will produce issues in the first and second line, while this second example
will produce no issues.