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                <?php declare(strict_types=1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace ApiClients\Client\Travis\CommandBus\Handler;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Pusher\AsyncClient as PusherAsyncClient;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Pusher\Event;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Pusher\Service\SharedAppClientService;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Travis\ApiSettings;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Travis\CommandBus\Command\JobLogCommand;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Client\Travis\Resource\LogLineInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use ApiClients\Foundation\Hydrator\Hydrator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use React\Promise\PromiseInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Rx\Observable;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Rx\ObserverInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Rx\SchedulerInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use function ApiClients\Tools\Rx\unwrapObservableFromPromise;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use function React\Promise\resolve;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use function WyriHaximus\React\futureFunctionPromise;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                final class JobLogHandler  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var SharedAppClientService  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $pusher;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var Hydrator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $hydrator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * JobLogHandler constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param SharedAppClientService $pusher  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Hydrator $hydrator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(SharedAppClientService $pusher, Hydrator $hydrator)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->pusher = $pusher;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->hydrator = $hydrator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Fetch the given repository and hydrate it  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param JobLogCommand $command  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return PromiseInterface  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    public function handle(JobLogCommand $command): PromiseInterface  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        return $this->pusher->share(  | 
            
            
                                                        
            
                                    
            
            
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                            ApiSettings::PUSHER_KEY  | 
            
            
                                                        
            
                                    
            
            
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                        )->then(function (PusherAsyncClient $pusher) use ($command) { | 
            
            
                                                        
            
                                    
            
            
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                            return resolve(Observable::create(function (  | 
            
            
                                                        
            
                                    
            
            
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                                ObserverInterface $observer,  | 
            
            
                                                        
            
                                    
            
            
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                                SchedulerInterface $scheduler  | 
            
            
                                                        
            
                                    
            
            
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                            ) use (  | 
            
            
                                                        
            
                                    
            
            
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                                $pusher,  | 
            
            
                                                        
            
                                    
            
            
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                                $command  | 
            
            
                                                        
            
                                    
            
            
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                            ) { | 
            
            
                                                        
            
                                    
            
            
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                                $subscription = $pusher->channel('job-' . (string)$command->getId())->filter(function (Event $event) { | 
            
                            
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                                    return $event->getEvent() === 'job:log';  | 
            
            
                                                        
            
                                    
            
            
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                                })->map(function (Event $event) { | 
            
            
                                                        
            
                                    
            
            
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                                    return $this->hydrator->hydrate(LogLineInterface::HYDRATE_CLASS, $event->getData());  | 
            
            
                                                        
            
                                    
            
            
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                                })->subscribeCallback(  | 
            
            
                                                        
            
                                    
            
            
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                                    function (LogLineInterface $line) use ($observer, &$subscription) { | 
            
            
                                                        
            
                                    
            
            
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                                        $observer->onNext($line);  | 
            
            
                                                        
            
                                    
            
            
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                                        if ($line->final()) { | 
            
            
                                                        
            
                                    
            
            
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                                            $subscription->dispose();  | 
            
            
                                                        
            
                                    
            
            
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                                        }  | 
            
            
                                                        
            
                                    
            
            
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                                    },  | 
            
            
                                                        
            
                                    
            
            
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                                    function ($error) use ($observer) { | 
            
            
                                                        
            
                                    
            
            
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                                        $observer->onError($error);  | 
            
            
                                                        
            
                                    
            
            
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                                    },  | 
            
            
                                                        
            
                                    
            
            
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                                    function () use ($observer) { | 
            
            
                                                        
            
                                    
            
            
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                                        $observer->onComplete();  | 
            
                            
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                                    },  | 
            
            
                                                        
            
                                    
            
            
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                                    $scheduler  | 
            
            
                                                        
            
                                    
            
            
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                                );  | 
            
            
                                                        
            
                                    
            
            
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                            }));  | 
            
            
                                                        
            
                                    
            
            
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                        });  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.