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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace AlfredTime;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use AlfredTime\ServiceApiCall;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                abstract class Service  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $serviceApiCall = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  $timerId  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function deleteTimer($timerId)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->serviceApiCall->send(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->methodForAction('delete'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->apiDeleteUrl($timerId)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  $descrition  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  $projectId  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  $tagData  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function startTimer($description, $projectId, $tagData)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $timerId = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $item = $this->generateTimer($description, $projectId, $tagData);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $data = $this->serviceApiCall->send(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->methodForAction('start'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->apiStartUrl(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ['json' => $item],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            true  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (isset($data['id']) === true) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $timerId = $data['id'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (isset($data['data']['id']) === true) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $timerId = $data['data']['id'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $timerId;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  $timerId  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function stopTimer($timerId)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->serviceApiCall->send(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->methodForAction('stop'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->apiStopUrl($timerId)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $baseUri  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $apiToken  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function __construct($baseUri, $credentials)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->serviceApiCall = new ServiceApiCall([  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'base_uri' => $baseUri,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'headers'  => [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'Authorization' => 'Basic ' . $credentials,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $timerId  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    abstract protected function apiDeleteUrl($timerId);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $timerId  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract protected function apiStopUrl($timerId);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract protected function getOnlineData();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $data  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract protected function getProjects($data);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract protected function getRecentTimers();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $data  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    abstract protected function getTags($data);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $action  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function methodForAction($action)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (isset($this->methods[$action]) === false) { | 
            
                            
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                            return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->methods[$action];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: