Complex classes like Database often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Database, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class Database |
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| 16 | { |
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| 17 | /** |
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| 18 | * @var Connector |
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| 19 | */ |
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| 20 | protected $connector; |
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| 21 | |||
| 22 | /** |
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| 23 | * @var \PDO |
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| 24 | */ |
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| 25 | protected $pdo; |
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| 26 | |||
| 27 | /** |
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| 28 | * @var \PDOStatement |
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| 29 | */ |
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| 30 | protected $statement; |
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| 31 | |||
| 32 | /** |
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| 33 | * @var Query |
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| 34 | */ |
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| 35 | protected $query; |
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| 36 | |||
| 37 | /** |
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| 38 | * @var Grammar |
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| 39 | */ |
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| 40 | protected $grammar; |
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| 41 | |||
| 42 | /** |
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| 43 | * @var array |
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| 44 | */ |
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| 45 | protected $driver = [ |
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| 46 | "mysql" => [ |
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| 47 | "connector" => ConnectorMySql::class, |
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| 48 | "grammar" => GrammarMySql::class, |
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| 49 | ] |
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| 50 | ]; |
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| 51 | |||
| 52 | /** |
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| 53 | * @var array |
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| 54 | */ |
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| 55 | protected $config = [ |
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| 56 | "driver" => "mysql", |
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| 57 | |||
| 58 | "host" => "", |
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| 59 | "username" => "", |
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| 60 | "password" => "", |
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| 61 | |||
| 62 | "dbname" => "", |
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| 63 | "options" => [ |
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| 64 | PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, |
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| 65 | PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC |
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| 66 | ] |
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| 67 | ]; |
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| 68 | |||
| 69 | /** |
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| 70 | * @var string |
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| 71 | */ |
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| 72 | protected $model = null; |
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| 73 | |||
| 74 | /** |
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| 75 | * @param $config |
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| 76 | */ |
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| 77 | public function __construct($config) |
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| 90 | |||
| 91 | /** |
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| 92 | * @param $config |
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| 93 | * @return static |
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| 94 | */ |
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| 95 | public static function create($config) |
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| 99 | |||
| 100 | /** |
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| 101 | * |
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| 102 | */ |
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| 103 | protected function initialize() |
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| 113 | |||
| 114 | /** |
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| 115 | * @return PDO |
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| 116 | */ |
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| 117 | public function createConnection() |
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| 122 | |||
| 123 | /** |
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| 124 | * @param $query |
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| 125 | * @param null $params |
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| 126 | * @return $this |
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| 127 | */ |
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| 128 | public function sql($query, $params = null) |
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| 133 | |||
| 134 | /** |
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| 135 | * @param $table |
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| 136 | * @return $this |
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| 137 | */ |
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| 138 | public function table($table) |
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| 143 | |||
| 144 | /** |
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| 145 | * @param null $columns |
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| 146 | * @return $this |
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| 147 | */ |
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| 148 | public function select($columns = null) |
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| 153 | |||
| 154 | /** |
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| 155 | * @param array $columnsVal |
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| 156 | * @param bool $runExecute |
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| 157 | * @return $this|mixed |
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| 158 | */ |
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| 159 | public function insert(array $columnsVal, $runExecute = false) |
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| 172 | |||
| 173 | /** |
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| 174 | * @param array $columnsVal |
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| 175 | * @param null $primaryKey |
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| 176 | * @return mixed |
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| 177 | */ |
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| 178 | public function update(array $columnsVal, $primaryKey = null) |
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| 196 | |||
| 197 | /** |
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| 198 | * @param null $primaryKey |
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| 199 | * @param null $primaryKeyVal |
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| 200 | * @return mixed |
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| 201 | */ |
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| 202 | public function delete($primaryKey = null, $primaryKeyVal = null) |
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| 216 | |||
| 217 | /** |
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| 218 | * @param $query |
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| 219 | * @param string $type |
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| 220 | * @return Query |
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| 221 | */ |
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| 222 | public function whereQ($query, $type = "AND") |
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| 227 | |||
| 228 | /** |
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| 229 | * @param $column |
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| 230 | * @param $value |
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| 231 | * @param string $operator |
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| 232 | * @param string $type |
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| 233 | * @return $this |
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| 234 | */ |
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| 235 | public function where($column, $value, $operator = "=", $type = "AND") |
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| 240 | |||
| 241 | /** |
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| 242 | * @param $column |
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| 243 | * @param $value |
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| 244 | * @param string $operator |
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| 245 | * @return $this |
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| 246 | */ |
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| 247 | public function andWhere($column, $value, $operator = "=") |
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| 252 | |||
| 253 | /** |
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| 254 | * @param $column |
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| 255 | * @param $value |
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| 256 | * @param string $operator |
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| 257 | * @return $this |
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| 258 | */ |
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| 259 | public function orWhere($column, $value, $operator = "=") |
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| 264 | |||
| 265 | /** |
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| 266 | * @param $column |
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| 267 | * @param $value |
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| 268 | * @param string $type |
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| 269 | * @return $this |
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| 270 | */ |
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| 271 | public function like($column, $value, $type = "AND") |
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| 276 | |||
| 277 | /** |
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| 278 | * @param $column |
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| 279 | * @param $value |
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| 280 | * @return $this |
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| 281 | */ |
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| 282 | public function andLike($column, $value) |
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| 287 | |||
| 288 | /** |
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| 289 | * @param $column |
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| 290 | * @param $value |
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| 291 | * @return $this |
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| 292 | */ |
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| 293 | public function orLike($column, $value) |
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| 298 | |||
| 299 | /** |
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| 300 | * @param $column |
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| 301 | * @param $value |
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| 302 | * @param string $type |
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| 303 | * @return $this |
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| 304 | */ |
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| 305 | public function between($column, $value, $type = "AND") |
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| 310 | |||
| 311 | /** |
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| 312 | * @param $column |
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| 313 | * @param $value |
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| 314 | * @return $this |
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| 315 | */ |
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| 316 | public function andBetween($column, $value) |
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| 321 | |||
| 322 | /** |
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| 323 | * @param $column |
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| 324 | * @param $value |
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| 325 | * @return $this |
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| 326 | */ |
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| 327 | public function orBetween($column, $value) |
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| 332 | |||
| 333 | /** |
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| 334 | * @param $column |
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| 335 | * @return $this |
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| 336 | */ |
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| 337 | public function asc($column) |
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| 342 | |||
| 343 | /** |
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| 344 | * @param $column |
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| 345 | * @return $this |
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| 346 | */ |
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| 347 | public function desc($column) |
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| 352 | |||
| 353 | /** |
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| 354 | * @param bool $returnThis |
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| 355 | * @return mixed |
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| 356 | */ |
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| 357 | public function execute($returnThis = true) |
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| 366 | |||
| 367 | /** |
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| 368 | * @return array |
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| 369 | * @throws \Exception |
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| 370 | */ |
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| 371 | public function all() |
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| 391 | |||
| 392 | /** |
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| 393 | * @return mixed |
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| 394 | */ |
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| 395 | public function first() |
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| 402 | |||
| 403 | /** |
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| 404 | * @return mixed |
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| 405 | * @throws \Exception |
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| 406 | */ |
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| 407 | protected function get() |
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| 418 | |||
| 419 | /** |
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| 420 | * @throws \Exception |
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| 421 | */ |
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| 422 | protected function executeIfNotAlreadyExecutedPreviously() |
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| 428 | |||
| 429 | /** |
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| 430 | * Clear statement PDO and query builder |
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| 431 | */ |
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| 432 | public function clear() |
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| 440 | |||
| 441 | /** |
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| 442 | * |
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| 443 | */ |
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| 444 | public function clearUsingModel() |
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| 448 | |||
| 449 | /** |
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| 450 | * @return string |
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| 451 | */ |
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| 452 | public function getModel() |
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| 456 | |||
| 457 | /** |
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| 458 | * @param string $model |
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| 459 | * @param null $table |
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| 460 | * @throws \Exception |
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| 461 | */ |
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| 462 | public function setModel($model, $table = null) |
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| 473 | |||
| 474 | /** |
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| 475 | * @return string |
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| 476 | */ |
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| 477 | public function lastInsertId() |
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| 481 | } |
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| 482 |