rhosocial /
yii2-base-models
Complex classes like MessageTrait 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 MessageTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 28 | trait MessageTrait |
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| 29 | { |
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| 30 | use MutualTrait; |
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| 31 | |||
| 32 | public $attachmentAttribute = 'attachment'; |
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| 33 | public $receivedAtAttribute = 'received_at'; |
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| 34 | public $readAtAttribute = 'read_at'; |
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| 35 | public static $eventMessageReceived = 'messageReceived'; |
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| 36 | public static $eventMessageRead = 'messageRead'; |
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| 37 | public $permitChangeContent = false; |
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| 38 | public $permitChangeReceivedAt = false; |
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| 39 | public $permitChangeReadAt = false; |
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| 40 | |||
| 41 | /** |
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| 42 | * Whether the message has been received. |
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| 43 | * Note: This trait should be used for models which use [[TimestampTrait]]. |
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| 44 | * @return boolean |
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| 45 | */ |
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| 46 | public function hasBeenReceived() |
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| 50 | |||
| 51 | /** |
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| 52 | * Whether the message has been read. |
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| 53 | * If a message has been read, it must have been received. |
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| 54 | * Note: This trait should be used for models which use [[TimestampTrait]]. |
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| 55 | * @return boolean |
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| 56 | */ |
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| 57 | public function hasBeenRead() |
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| 61 | |||
| 62 | public function touchReceived() |
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| 66 | |||
| 67 | public function touchRead() |
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| 71 | |||
| 72 | public function getReceivedAt() |
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| 80 | |||
| 81 | 9 | public function setReceivedAt($receivedAt) |
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| 82 | { |
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| 83 | 9 | if (is_string($this->receivedAtAttribute) && !empty($this->receivedAtAttribute)) { |
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| 84 | 9 | $raAttribute = $this->receivedAtAttribute; |
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| 85 | 9 | return $this->$raAttribute = $receivedAt; |
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| 86 | } |
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| 87 | return null; |
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| 88 | } |
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| 89 | |||
| 90 | public function getReadAt() |
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| 98 | |||
| 99 | 9 | public function setReadAt($readAt) |
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| 100 | { |
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| 101 | 9 | if (is_string($this->readAtAttribute) && !empty($this->readAtAttribute)) { |
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| 102 | 9 | $raAttribute = $this->readAtAttribute; |
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| 103 | 9 | return $this->$raAttribute = $readAt; |
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| 104 | } |
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| 105 | return null; |
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| 106 | } |
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| 107 | |||
| 108 | /** |
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| 109 | * |
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| 110 | * @param ModelEvent $event |
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| 111 | */ |
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| 112 | 9 | public function onInitReceivedAtAttribute($event) |
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| 113 | { |
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| 114 | 9 | $sender = $event->sender; |
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| 115 | /* @var $sender static */ |
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| 116 | 9 | $sender->setReceivedAt(static::getInitDatetime($event)); |
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| 117 | 9 | } |
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| 118 | |||
| 119 | /** |
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| 120 | * |
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| 121 | * @param ModelEvent $event |
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| 122 | */ |
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| 123 | 9 | public function onInitReadAtAttribute($event) |
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| 124 | { |
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| 125 | 9 | $sender = $event->sender; |
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| 126 | /* @var $sender static */ |
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| 127 | 9 | $sender->setReadAt(static::getInitDatetime($event)); |
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| 128 | 9 | } |
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| 129 | |||
| 130 | /** |
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| 131 | * We consider you have received the message if you read it. |
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| 132 | * @param ModelEvent $event |
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| 133 | */ |
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| 134 | public function onReadAtChanged($event) |
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| 155 | |||
| 156 | /** |
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| 157 | * You are not allowed to change receiving time if you have received it. |
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| 158 | * @param ModelEvent $event |
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| 159 | */ |
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| 160 | public function onReceivedAtChanged($event) |
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| 176 | |||
| 177 | /** |
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| 178 | * You are not allowed to change the content if it is not new message. |
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| 179 | * @param ModelEvent $event |
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| 180 | */ |
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| 181 | public function onContentChanged($event) |
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| 196 | |||
| 197 | /** |
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| 198 | * |
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| 199 | * @param AfterSaveEvent $event |
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| 200 | */ |
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| 201 | public function onMessageUpdated($event) |
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| 214 | |||
| 215 | /** |
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| 216 | * |
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| 217 | */ |
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| 218 | 9 | public function initMessageEvents() |
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| 227 | |||
| 228 | /** |
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| 229 | * Return rules associated with message. |
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| 230 | * @return array |
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| 231 | */ |
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| 232 | 9 | public function getMessageRules() |
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| 247 | |||
| 248 | /** |
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| 249 | * @inheritdoc |
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| 250 | * @return array |
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| 251 | */ |
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| 252 | 9 | public function rules() |
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| 256 | |||
| 257 | /** |
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| 258 | * @inheritdoc |
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| 259 | * @return array |
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| 260 | */ |
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| 261 | 9 | public function enabledFields() |
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| 278 | } |
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| 279 |
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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.