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 HasRoles 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 HasRoles, and based on these observations, apply Extract Interface, too.
1 | <?php |
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11 | trait HasRoles |
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12 | { |
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13 | use HasPermissions; |
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14 | |||
15 | public static function bootHasRoles() |
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22 | |||
23 | /** |
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24 | * A model may have multiple roles. |
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25 | */ |
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26 | public function roles(): MorphToMany |
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36 | |||
37 | /** |
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38 | * A model may have multiple direct permissions. |
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39 | */ |
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40 | public function permissions(): MorphToMany |
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50 | |||
51 | /** |
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52 | * Scope the model query to certain roles only. |
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53 | * |
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54 | * @param \Illuminate\Database\Eloquent\Builder $query |
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55 | * @param string|array|\Spatie\Permission\Contracts\Role|\Illuminate\Support\Collection $roles |
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56 | * |
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57 | * @return \Illuminate\Database\Eloquent\Builder |
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58 | */ |
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59 | public function scopeRole(Builder $query, $roles): Builder |
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85 | |||
86 | /** |
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87 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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88 | * |
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89 | * @return array |
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90 | */ |
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91 | protected function convertToPermissionModels($permissions): array |
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107 | |||
108 | /** |
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109 | * Scope the model query to certain permissions only. |
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110 | * |
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111 | * @param \Illuminate\Database\Eloquent\Builder $query |
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112 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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113 | * |
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114 | * @return \Illuminate\Database\Eloquent\Builder |
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115 | */ |
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116 | public function scopePermission(Builder $query, $permissions): Builder |
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144 | |||
145 | /** |
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146 | * Assign the given role to the model. |
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147 | * |
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148 | * @param array|string|\Spatie\Permission\Contracts\Role ...$roles |
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149 | * |
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150 | * @return $this |
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151 | */ |
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152 | View Code Duplication | public function assignRole(...$roles) |
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170 | |||
171 | /** |
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172 | * Revoke the given role from the model. |
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173 | * |
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174 | * @param string|\Spatie\Permission\Contracts\Role $role |
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175 | */ |
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176 | public function removeRole($role) |
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180 | |||
181 | /** |
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182 | * Remove all current roles and set the given ones. |
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183 | * |
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184 | * @param array|\Spatie\Permission\Contracts\Role|string ...$roles |
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185 | * |
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186 | * @return $this |
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187 | */ |
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188 | public function syncRoles(...$roles) |
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194 | |||
195 | /** |
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196 | * Determine if the model has (one of) the given role(s). |
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197 | * |
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198 | * @param string|array|\Spatie\Permission\Contracts\Role|\Illuminate\Support\Collection $roles |
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199 | * |
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200 | * @return bool |
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201 | */ |
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202 | public function hasRole($roles): bool |
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228 | |||
229 | /** |
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230 | * Determine if the model has any of the given role(s). |
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231 | * |
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232 | * @param string|array|\Spatie\Permission\Contracts\Role|\Illuminate\Support\Collection $roles |
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233 | * |
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234 | * @return bool |
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235 | */ |
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236 | public function hasAnyRole($roles): bool |
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240 | |||
241 | /** |
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242 | * Determine if the model has all of the given role(s). |
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243 | * |
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244 | * @param string|\Spatie\Permission\Contracts\Role|\Illuminate\Support\Collection $roles |
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245 | * |
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246 | * @return bool |
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247 | */ |
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248 | public function hasAllRoles($roles): bool |
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268 | |||
269 | /** |
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270 | * Determine if the model may perform the given permission. |
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271 | * |
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272 | * @param string|\Spatie\Permission\Contracts\Permission $permission |
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273 | * @param string|null $guardName |
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274 | * |
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275 | * @return bool |
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276 | */ |
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277 | public function hasPermissionTo($permission, $guardName = null): bool |
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288 | |||
289 | /** |
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290 | * Determine if the model has any of the given permissions. |
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291 | * |
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292 | * @param array ...$permissions |
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293 | * |
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294 | * @return bool |
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295 | */ |
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296 | public function hasAnyPermission(...$permissions): bool |
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310 | |||
311 | /** |
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312 | * Determine if the model has, via roles, the given permission. |
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313 | * |
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314 | * @param \Spatie\Permission\Contracts\Permission $permission |
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315 | * |
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316 | * @return bool |
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317 | */ |
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318 | protected function hasPermissionViaRole(Permission $permission): bool |
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322 | |||
323 | /** |
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324 | * Determine if the model has the given permission. |
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325 | * |
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326 | * @param string|\Spatie\Permission\Contracts\Permission $permission |
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327 | * |
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328 | * @return bool |
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329 | */ |
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330 | public function hasDirectPermission($permission): bool |
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342 | |||
343 | /** |
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344 | * Return all permissions the directory coupled to the model. |
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345 | */ |
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346 | public function getDirectPermissions(): Collection |
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350 | |||
351 | /** |
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352 | * Return all the permissions the model has via roles. |
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353 | */ |
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354 | public function getPermissionsViaRoles(): Collection |
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361 | |||
362 | /** |
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363 | * Return all the permissions the model has, both directly and via roles. |
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364 | */ |
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365 | public function getAllPermissions(): Collection |
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372 | |||
373 | public function getRoleNames(): Collection |
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377 | |||
378 | protected function getStoredRole($role): Role |
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386 | |||
387 | protected function convertPipeToArray(string $pipeString) |
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408 | } |
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409 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.