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 AbstractRestfulController 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 AbstractRestfulController, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 35 | abstract class AbstractRestfulController extends BaseController |
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| 36 | { |
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| 37 | use AuthorizesRequests; |
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| 38 | use ValidatesRequests; |
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| 39 | |||
| 40 | /** |
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| 41 | * The views to render. |
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| 42 | * @var string[] |
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| 43 | */ |
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| 44 | protected $views = []; |
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| 45 | |||
| 46 | /** |
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| 47 | * What Model class to search for entities. |
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| 48 | * @return string |
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| 49 | */ |
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| 50 | abstract protected function getModelClass(): string; |
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| 51 | |||
| 52 | /** |
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| 53 | * Return a list of matching models. |
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| 54 | * @param Request $request |
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| 55 | * @return JsonResponse|RedirectResponse|ResponseFactory|Response|Redirector |
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| 56 | */ |
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| 57 | public function index(Request $request) |
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| 74 | |||
| 75 | /** |
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| 76 | * Handles creating a model. The C of CRUD |
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| 77 | * @param Request $request |
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| 78 | * @return JsonResponse|RedirectResponse|ResponseFactory|Response|Redirector |
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| 79 | */ |
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| 80 | View Code Duplication | public function store(Request $request) |
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| 92 | |||
| 93 | /** |
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| 94 | * Shows a model. The R of CRUD. |
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| 95 | * @param Request $request |
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| 96 | * @param int $id |
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| 97 | * @return JsonResponse|RedirectResponse|ResponseFactory|Response|Redirector |
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| 98 | */ |
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| 99 | public function show(Request $request, $id) |
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| 107 | |||
| 108 | /** |
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| 109 | * Update a record. The U of CRUD. |
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| 110 | * @param Request $request |
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| 111 | * @param int $id |
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| 112 | * @return JsonResponse|RedirectResponse|ResponseFactory|Response|Redirector |
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| 113 | */ |
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| 114 | View Code Duplication | public function update(Request $request, $id) |
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| 126 | |||
| 127 | /** |
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| 128 | * Destroy a model. The D of CRUD. |
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| 129 | * @param Request $request |
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| 130 | * @param int $id |
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| 131 | * @return ResponseFactory|Response |
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| 132 | * @throws Exception |
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| 133 | */ |
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| 134 | public function destroy(Request $request, $id) |
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| 142 | |||
| 143 | |||
| 144 | /** |
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| 145 | * Return the _links. The O of CRUD..... |
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| 146 | * @param Request $request |
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| 147 | * @return ResponseFactory|JsonResponse|RedirectResponse|Response|Redirector |
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| 148 | */ |
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| 149 | public function options(Request $request) |
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| 163 | |||
| 164 | /** |
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| 165 | * Generate a new query builder for the model. |
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| 166 | * @return Builder |
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| 167 | */ |
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| 168 | protected function createModelQueryBuilder(): Builder |
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| 174 | |||
| 175 | /** |
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| 176 | * Creates a new model instance. |
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| 177 | * @return Model |
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| 178 | */ |
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| 179 | protected function newModelInstance(): Model |
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| 185 | |||
| 186 | /** |
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| 187 | * Looks for an "extra" param in the route, and if it exists, looks for relationships |
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| 188 | * based on that route. |
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| 189 | * @param Model $model |
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| 190 | * @param Request $request |
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| 191 | * @return LengthAwarePaginator|Collection|Model|mixed |
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| 192 | * @throws BadMethodCallException |
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| 193 | */ |
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| 194 | protected function iterateThroughChildren(Model $model, Request $request) |
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| 235 | |||
| 236 | /** |
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| 237 | * Finds the model instance. |
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| 238 | * @param int|string $id |
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| 239 | * @param Request|null $request |
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| 240 | * @return Model |
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| 241 | */ |
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| 242 | protected function findModel($id, Request $request = null): Model |
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| 254 | |||
| 255 | /** |
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| 256 | * Apply causes to the builder. |
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| 257 | * @param Builder $builder |
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| 258 | * @param string $column |
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| 259 | * @param mixed $value |
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| 260 | */ |
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| 261 | protected function filterValue(Builder $builder, string $column, $value): void |
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| 265 | |||
| 266 | /** |
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| 267 | * Build and return a response. |
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| 268 | * @param Request $request |
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| 269 | * @param mixed $data |
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| 270 | * @param string $method |
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| 271 | * @return JsonResponse|ResponseFactory|Response|RedirectResponse|Redirector |
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| 272 | */ |
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| 273 | protected function return(Request $request, $data, string $method) |
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| 310 | |||
| 311 | /** |
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| 312 | * Redirects to the show route for the model if one exists. |
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| 313 | * @param Request $request |
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| 314 | * @param mixed $data |
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| 315 | * @return RedirectResponse|Redirector|null |
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| 316 | */ |
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| 317 | protected function redirectToShowRoute(Request $request, $data) |
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| 363 | |||
| 364 | /** |
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| 365 | * Preload any relationships required. |
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| 366 | * @param Model $class |
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| 367 | * @param Request $request |
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| 368 | * @return void |
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| 369 | */ |
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| 370 | protected function preloadRelationships(Model &$class, Request $request): void |
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| 386 | |||
| 387 | /** |
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| 388 | * Save a model, either from a store or an update. |
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| 389 | * @param Model $model |
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| 390 | * @return bool |
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| 391 | */ |
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| 392 | private function saveModel(Model $model) |
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| 396 | } |
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| 397 |
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: