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<?php |
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/** |
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* _ __ __ _____ _____ ___ ____ _____ |
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* | | / // // ___//_ _// || __||_ _| |
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* | |/ // /(__ ) / / / /| || | | | |
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* |___//_//____/ /_/ /_/ |_||_| |_| |
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* @link https://vistart.me/ |
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* @copyright Copyright (c) 2016 - 2017 vistart |
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* @license https://vistart.me/license/ |
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*/ |
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namespace rhosocial\base\models\traits; |
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use rhosocial\base\helpers\Number; |
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use yii\base\ModelEvent; |
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/** |
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* Entity features concerning GUID. |
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* @property string $GUID GUID value in 128-bit(16 bytes) binary format. |
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* @property-read string $readableGUID Readable GUID value seperated with four hyphens. |
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* @property-read array $guidRules |
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* @version 1.0 |
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* @author vistart <[email protected]> |
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*/ |
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trait GUIDTrait |
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{ |
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/** |
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* @var string REQUIRED. The attribute that will receive the GUID value. |
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*/ |
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public $guidAttribute = 'guid'; |
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/** |
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* DO NOT MODIFY OR OVERRIDE THIS METHOD UNLESS YOU KNOW THE CONSEQUENCES. |
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* @return string |
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*/ |
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public function getReadableGuidAttribute() |
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{ |
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return 'readableGuid'; |
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} |
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/** |
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* Attach `onInitGUIDAttribute` event. |
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* @param string $eventName |
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*/ |
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protected function attachInitGUIDEvent($eventName) |
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{ |
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$this->on($eventName, [$this, 'onInitGUIDAttribute']); |
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} |
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/** |
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* Initialize the GUID attribute with new generated GUID. |
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* This method is ONLY used for being triggered by event. DO NOT call, |
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* ovveride or modify it directly, unless you know the conquences. |
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* @param ModelEvent $event |
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*/ |
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public function onInitGUIDAttribute($event) |
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{ |
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$sender = $event->sender; |
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/* @var $sender static */ |
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$sender->setGUID(static::generateGuid()); |
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} |
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/** |
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* Generate GUID in binary. |
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* @return string GUID. |
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*/ |
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392 |
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public static function generateGuid() |
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{ |
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return Number::guid_bin(); |
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} |
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/** |
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* Check if the $guid existed in current database table. |
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* @param string $guid the GUID to be checked. |
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* @return boolean Whether the $guid exists or not. |
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*/ |
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public static function checkGuidExists($guid) |
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{ |
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return static::findOne($guid) !== null; |
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} |
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/** |
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* Get the rules associated with GUID attribute. |
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* @return array GUID rules. |
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*/ |
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public function getGUIDRules() |
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{ |
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$rules = []; |
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if (is_string($this->guidAttribute) && !empty($this->guidAttribute)) { |
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$rules = [ |
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[[$this->guidAttribute], 'required',], |
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[[$this->guidAttribute], 'unique',], |
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[[$this->guidAttribute], 'string', 'max' => 16], |
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]; |
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} |
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return $rules; |
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} |
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/** |
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* Get GUID, in spite of guid attribute name. |
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* @return string |
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*/ |
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public function getGUID() |
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{ |
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$guidAttribute = $this->guidAttribute; |
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return (is_string($guidAttribute) && !empty($guidAttribute)) ? $this->$guidAttribute : null; |
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} |
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/** |
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* Get Readable GUID. |
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* @return string |
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*/ |
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public function getReadableGUID() |
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{ |
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$guid = $this->getGUID(); |
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if (preg_match(Number::GUID_REGEX, $guid)) { |
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return $guid; |
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} |
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return Number::guid(false, false, $guid); |
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} |
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/** |
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* Set guid, in spite of guid attribute name. |
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* @param string $guid |
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* @return string |
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*/ |
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public function setGUID($guid) |
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{ |
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$guidAttribute = $this->guidAttribute; |
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if (preg_match(Number::GUID_REGEX, $guid)) { |
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$guid = hex2bin(str_replace(['{', '}', '-'], '', $guid)); |
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} |
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return (is_string($guidAttribute) && !empty($guidAttribute)) ? $this->$guidAttribute = $guid : null; |
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} |
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/** |
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* Composite GUIDs from models. |
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* @param array|string $models |
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* @return array |
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*/ |
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public static function compositeGUIDs($models) |
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{ |
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if (empty($models)) { |
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return null; |
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} |
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if (!is_array($models) && $models instanceof static) { |
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return $models->getGUID(); |
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} |
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if (is_string($models) && strlen($models) == 16) { |
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return $models; |
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} |
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$guids = []; |
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foreach ($models as $model) { |
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if ($model instanceof static) { |
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$guids[] = $model->getGUID(); |
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} elseif (is_string($model)) { |
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if (strlen($model) == 16) { |
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$guids[] = $model; |
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} elseif (preg_match(Number::GUID_REGEX, $model)) { |
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$guids[] = Number::guid_bin($model); |
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} |
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} |
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} |
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return $guids; |
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} |
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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
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.