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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the InMemoryList package.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Mauro Cassani<https://github.com/mauretto78>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  For the full copyright and license information, please view the LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  file that was distributed with this source code.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace InMemoryList\Infrastructure\Drivers;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use InMemoryList\Infrastructure\Drivers\Contracts\DriverInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use InMemoryList\Infrastructure\Drivers\Exceptions\PdoDriverCheckException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use InMemoryList\Infrastructure\Drivers\Exceptions\PdoMalformedConfigException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class PdoDriver implements DriverInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $config;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var \PDO  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $instance;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * RedisDriver constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @codeCoverageIgnore  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $config  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws PdoDriverCheckException  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(array $config = [])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->setConfig($config);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!$this->check()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            throw new PdoDriverCheckException('PDO extension is not loaded.'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->connect();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $config  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws PdoMalformedConfigException  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function setConfig($config)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $allowedConfigKeys = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'driver',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'host',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'username',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'password',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'database',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'port',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'options',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'charset',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach ($config as $param => $server) { | 
            
                            
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                            if (is_array($server)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                foreach (array_keys($server) as $key) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    if (!in_array($key, $allowedConfigKeys)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        throw new PdoMalformedConfigException();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (!is_array($server) && !in_array($param, $allowedConfigKeys)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                throw new PdoMalformedConfigException();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->config = $config;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @codeCoverageIgnore  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function check()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return extension_loaded('PDO'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function clear()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function connect()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $servers = $this->config ?: [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (count($servers) === 1) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $servers = $servers[0];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (count($servers) === 0) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $servers = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'host' => '127.0.0.1',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'port' => 3306,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'username' => 'root',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'password' => null,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'driver' => 'mysql',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'charset' => 'utf8',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'database' => 'in-memory-list',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $port = (isset($servers['port'])) ? $servers['port'] : '3306';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $charset = (isset($servers['charset'])) ? $servers['charset'] : 'utf8';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $dsn = $servers['driver'].':host='.$servers['host'].':'.$port.';dbname='.$servers['database'].';charset='.$charset;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->instance = new \PDO($dsn, $servers['username'], $servers['password']);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getInstance()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                        return $this->instance;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.