Complex classes like UsersAttributeTrait 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 UsersAttributeTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 24 | trait UsersAttributeTrait |
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| 25 | { |
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| 26 | /** |
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| 27 | * @var UserQuery |
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| 28 | */ |
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| 29 | private $users; |
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| 30 | |||
| 31 | /** |
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| 32 | * @param array $sourceElements |
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| 33 | * @return array |
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| 34 | */ |
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| 35 | private static function eagerLoadingUsersMap(array $sourceElements) |
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| 51 | |||
| 52 | /************************************************************ |
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| 53 | * REQUEST |
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| 54 | ************************************************************/ |
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| 55 | |||
| 56 | /** |
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| 57 | * AssociateUserToOrganization an array of users from request input |
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| 58 | * |
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| 59 | * @param string $identifier |
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| 60 | * @return $this |
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| 61 | */ |
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| 62 | public function setUsersFromRequest(string $identifier = 'users') |
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| 70 | |||
| 71 | /************************************************************ |
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| 72 | * USERS |
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| 73 | ************************************************************/ |
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| 74 | |||
| 75 | /** |
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| 76 | * @param array $criteria |
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| 77 | * @return UserQuery |
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| 78 | */ |
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| 79 | public function userQuery($criteria = []): UserQuery |
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| 98 | |||
| 99 | /** |
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| 100 | * Get an array of users associated to an organization |
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| 101 | * |
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| 102 | * @param array $criteria |
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| 103 | * @return UserQuery |
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| 104 | */ |
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| 105 | public function getUsers($criteria = []) |
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| 120 | |||
| 121 | /** |
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| 122 | * AssociateUserToOrganization users to an organization |
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| 123 | * |
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| 124 | * @param $users |
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| 125 | * @return $this |
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| 126 | */ |
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| 127 | public function setUsers($users) |
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| 144 | |||
| 145 | /** |
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| 146 | * AssociateUserToOrganization an array of users to an organization |
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| 147 | * |
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| 148 | * @param $users |
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| 149 | * @return $this |
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| 150 | */ |
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| 151 | public function addUsers(array $users) |
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| 169 | |||
| 170 | protected function resolveUser($user) |
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| 193 | |||
| 194 | /** |
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| 195 | * AssociateUserToOrganization a user to an organization |
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| 196 | * |
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| 197 | * @param User $user |
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| 198 | * @return $this |
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| 199 | */ |
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| 200 | public function addUser(User $user) |
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| 218 | |||
| 219 | /** |
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| 220 | * DissociateUserFromOrganization a user from an organization |
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| 221 | * |
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| 222 | * @param array $users |
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| 223 | * @return $this |
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| 224 | */ |
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| 225 | public function removeUsers(array $users) |
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| 243 | |||
| 244 | /** |
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| 245 | * DissociateUserFromOrganization a user from an organization |
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| 246 | * |
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| 247 | * @param User $user |
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| 248 | * @return $this |
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| 249 | */ |
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| 250 | public function removeUser(User $user) |
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| 268 | |||
| 269 | /** |
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| 270 | * Reset users |
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| 271 | * |
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| 272 | * @return $this |
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| 273 | */ |
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| 274 | public function resetUsers() |
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| 279 | |||
| 280 | |||
| 281 | /******************************************* |
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| 282 | * ASSOCIATE and/or DISASSOCIATE |
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| 283 | *******************************************/ |
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| 284 | |||
| 285 | /** |
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| 286 | * @return bool |
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| 287 | * @throws \Throwable |
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| 288 | * @throws \yii\db\StaleObjectException |
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| 289 | */ |
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| 290 | public function saveUsers() |
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| 338 | |||
| 339 | /** |
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| 340 | * @param UserQuery $query |
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| 341 | * @return bool |
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| 342 | * @throws \Throwable |
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| 343 | */ |
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| 344 | public function associateUsers(UserQuery $query) |
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| 378 | |||
| 379 | /** |
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| 380 | * @param UserQuery $query |
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| 381 | * @return bool |
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| 382 | * @throws \Throwable |
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| 383 | */ |
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| 384 | public function dissociateUsers(UserQuery $query) |
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| 417 | } |
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| 418 |
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
Idableprovides a methodequalsIdthat 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.