yajra /
laravel-datatables
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like QueryBuilderEngine 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 QueryBuilderEngine, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class QueryBuilderEngine extends BaseEngine |
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| 20 | { |
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| 21 | /** |
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| 22 | * @param \Illuminate\Database\Query\Builder $builder |
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| 23 | * @param \Yajra\Datatables\Request $request |
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| 24 | */ |
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| 25 | public function __construct(Builder $builder, Request $request) |
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| 30 | |||
| 31 | /** |
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| 32 | * Initialize attributes. |
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| 33 | * |
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| 34 | * @param \Yajra\Datatables\Request $request |
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| 35 | * @param \Illuminate\Database\Query\Builder $builder |
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| 36 | * @param string $type |
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| 37 | */ |
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| 38 | protected function init($request, $builder, $type = 'builder') |
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| 50 | |||
| 51 | /** |
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| 52 | * Set auto filter off and run your own filter. |
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| 53 | * Overrides global search |
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| 54 | * |
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| 55 | * @param \Closure $callback |
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| 56 | * @param bool $globalSearch |
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| 57 | * @return $this |
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| 58 | */ |
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| 59 | public function filter(Closure $callback, $globalSearch = false) |
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| 65 | |||
| 66 | /** |
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| 67 | * Organizes works |
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| 68 | * |
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| 69 | * @param bool $mDataSupport |
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| 70 | * @param bool $orderFirst |
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| 71 | * @return \Illuminate\Http\JsonResponse |
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| 72 | */ |
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| 73 | public function make($mDataSupport = false, $orderFirst = false) |
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| 77 | |||
| 78 | /** |
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| 79 | * Count total items. |
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| 80 | * |
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| 81 | * @return integer |
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| 82 | */ |
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| 83 | public function totalCount() |
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| 87 | |||
| 88 | /** |
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| 89 | * Counts current query. |
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| 90 | * |
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| 91 | * @return int |
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| 92 | */ |
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| 93 | public function count() |
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| 106 | |||
| 107 | /** |
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| 108 | * Wrap column with DB grammar. |
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| 109 | * |
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| 110 | * @param string $column |
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| 111 | * @return string |
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| 112 | */ |
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| 113 | protected function wrap($column) |
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| 117 | |||
| 118 | /** |
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| 119 | * Perform global search. |
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| 120 | * |
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| 121 | * @return void |
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| 122 | */ |
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| 123 | public function filtering() |
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| 184 | |||
| 185 | /** |
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| 186 | * Perform filter column on selected field. |
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| 187 | * |
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| 188 | * @param mixed $query |
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| 189 | * @param string|Closure $method |
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| 190 | * @param mixed $parameters |
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| 191 | * @param string $column |
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| 192 | * @param string $keyword |
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| 193 | */ |
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| 194 | protected function compileColumnQuery($query, $method, $parameters, $column, $keyword) |
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| 214 | |||
| 215 | /** |
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| 216 | * Build Query Builder Parameters. |
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| 217 | * |
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| 218 | * @return array |
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| 219 | */ |
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| 220 | protected function parameterize() |
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| 229 | |||
| 230 | /** |
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| 231 | * Get eager loads keys if eloquent. |
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| 232 | * |
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| 233 | * @return array |
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| 234 | */ |
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| 235 | protected function getEagerLoads() |
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| 243 | |||
| 244 | /** |
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| 245 | * Add relation query on global search. |
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| 246 | * |
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| 247 | * @param mixed $query |
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| 248 | * @param string $relation |
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| 249 | * @param string $column |
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| 250 | * @param string $keyword |
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| 251 | */ |
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| 252 | protected function compileRelationSearch($query, $relation, $column, $keyword) |
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| 263 | |||
| 264 | /** |
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| 265 | * Compile query builder where clause depending on configurations. |
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| 266 | * |
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| 267 | * @param mixed $query |
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| 268 | * @param string $column |
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| 269 | * @param string $keyword |
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| 270 | * @param string $relation |
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| 271 | */ |
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| 272 | protected function compileQuerySearch($query, $column, $keyword, $relation = 'or') |
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| 284 | |||
| 285 | /** |
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| 286 | * Wrap a column and cast in pgsql. |
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| 287 | * |
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| 288 | * @param string $column |
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| 289 | * @return string |
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| 290 | */ |
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| 291 | public function castColumn($column) |
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| 302 | |||
| 303 | /** |
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| 304 | * Prepare search keyword based on configurations. |
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| 305 | * |
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| 306 | * @param string $keyword |
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| 307 | * @return string |
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| 308 | */ |
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| 309 | protected function prepareKeyword($keyword) |
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| 325 | |||
| 326 | /** |
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| 327 | * Perform column search. |
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| 328 | * |
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| 329 | * @return void |
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| 330 | */ |
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| 331 | public function columnSearch() |
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| 379 | |||
| 380 | /** |
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| 381 | * Get proper keyword to use for search. |
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| 382 | * |
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| 383 | * @param int $i |
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| 384 | * @param bool $raw |
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| 385 | * @return string |
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| 386 | */ |
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| 387 | private function getSearchKeyword($i, $raw = false) |
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| 396 | |||
| 397 | /** |
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| 398 | * Join eager loaded relation and get the related column name. |
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| 399 | * |
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| 400 | * @param string $relation |
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| 401 | * @param string $relationColumn |
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| 402 | * @return string |
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| 403 | */ |
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| 404 | protected function joinEagerLoadedColumn($relation, $relationColumn) |
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| 448 | |||
| 449 | /** |
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| 450 | * Compile queries for column search. |
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| 451 | * |
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| 452 | * @param int $i |
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| 453 | * @param mixed $column |
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| 454 | * @param string $keyword |
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| 455 | */ |
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| 456 | protected function compileColumnSearch($i, $column, $keyword) |
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| 465 | |||
| 466 | /** |
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| 467 | * Compile regex query column search. |
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| 468 | * |
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| 469 | * @param mixed $column |
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| 470 | * @param string $keyword |
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| 471 | */ |
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| 472 | protected function regexColumnSearch($column, $keyword) |
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| 482 | |||
| 483 | /** |
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| 484 | * Perform sorting of columns. |
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| 485 | * |
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| 486 | * @return void |
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| 487 | */ |
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| 488 | public function ordering() |
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| 529 | |||
| 530 | /** |
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| 531 | * Perform pagination |
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| 532 | * |
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| 533 | * @return void |
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| 534 | */ |
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| 535 | public function paging() |
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| 540 | |||
| 541 | /** |
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| 542 | * Get results |
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| 543 | * |
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| 544 | * @return array|static[] |
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| 545 | */ |
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| 546 | public function results() |
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| 550 | } |
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| 551 |
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