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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 http://vistart.name/ |
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* @copyright Copyright (c) 2016 vistart |
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* @license http://vistart.name/license/ |
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*/ |
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namespace vistart\Models\traits; |
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use vistart\Helpers\Number; |
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use vistart\Models\events\MultipleBlameableEvent; |
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use yii\web\JsonParser; |
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/** |
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* 一个模型的某个属性可能对应多个责任者,该 trait 用于处理此种情况。此种情况违反 |
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* 了关系型数据库第一范式,因此此 trait 只适用于责任者属性修改不频繁的场景,在开 |
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* 发时必须严格测试数据一致性,并同时考量性能。 |
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* Basic Principles: |
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* <ol> |
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* <li>when adding blame, it will check whether each of blames including to be |
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* added is valid. |
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* </li> |
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* <li>when removing blame, as well as counting, getting or setting list of them, |
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* it will also check whether each of blames is valid. |
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* </li> |
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* <li>By default, once blame was deleted, the guid of it is not removed from |
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* list of blames immediately. It will check blame if valid when adding, removing, |
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* counting, getting and setting it. You can define a blame model and attach it |
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* events triggered when inserting, updating and deleting a blame, then disable |
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* checking the validity of blames. |
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* </li> |
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* </ol> |
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* Notice: |
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* <ol> |
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* <li>You must specify two properties: $multiBlamesClass and $multiBlamesAttribute. |
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* <ul> |
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* <li>$multiBlamesClass specify the class name of blame.</li> |
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* <li>$multiBlamesAttribute specify the field name of blames.</li> |
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* </ul> |
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* </li> |
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* <li>You should rename each name of following methods to be needed optionally.</li> |
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* </ol> |
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* @property-read array $multiBlamesAttributeRules |
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* @property array $blameGuids |
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* @property-read array $allBlames |
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* @property-read array $nonBlameds |
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* @property-read integer $blamesCount |
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* @version 2.0 |
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* @author vistart <[email protected]> |
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*/ |
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trait MultipleBlameableTrait |
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{ |
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/** |
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* @var string class name of multiple blameable class. |
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*/ |
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public $multiBlamesClass = ''; |
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/** |
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* @var string name of multiple blameable attribute. |
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*/ |
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public $multiBlamesAttribute = 'blames'; |
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/** |
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* @var integer the limit of blames. it should be greater than or equal 1, and |
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* less than or equal 10. |
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*/ |
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public $blamesLimit = 10; |
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/** |
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* @var boolean determines whether blames list has been changed. |
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*/ |
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public $blamesChanged = false; |
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/** |
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* @var string event name. |
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*/ |
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public static $eventMultipleBlamesChanged = 'multipleBlamesChanged'; |
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/** |
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* Get the rules associated with multiple blameable attribute. |
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* @return array rules. |
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*/ |
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public function getMultipleBlameableAttributeRules() |
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{ |
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return is_string($this->multiBlamesAttribute) ? [ |
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[[$this->multiBlamesAttribute], 'required'], |
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[[$this->multiBlamesAttribute], 'string', 'max' => $this->blamesLimit * 39 + 1], |
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[[$this->multiBlamesAttribute], 'default', 'value' => '[]'], |
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] : []; |
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} |
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/** |
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* Add specified blame. |
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* @param [multiBlamesClass]|string $blame |
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* @return false|array |
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*/ |
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public function addBlame($blame) |
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{ |
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if (!is_string($this->multiBlamesAttribute)) { |
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return false; |
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} |
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$blameGuid = ''; |
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if (is_string($blame)) { |
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$blameGuid = $blame; |
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} |
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if ($blame instanceof $this->multiBlamesClass) { |
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$blameGuid = $blame->guid; |
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} |
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$blameGuids = $this->getBlameGuids(true); |
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if (array_search($blameGuid, $blameGuids)) { |
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throw new \yii\base\InvalidParamException('the blame has existed.'); |
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} |
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if ($this->getBlamesCount() >= $this->blamesLimit) { |
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throw new \yii\base\InvalidCallException("the limit($this->blamesLimit) of blames has been reached."); |
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} |
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$blameGuids[] = $blameGuid; |
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$this->setBlameGuids($blameGuids); |
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return $this->getBlameGuids(); |
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} |
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/** |
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* Create blame. |
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* @param \vistart\Models\models\BaseUserModel $user who will own this blame. |
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* @param array $config blame class config array. |
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*/ |
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public static function createBlame($user, $config = []) |
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{ |
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if (!($user instanceof \vistart\Models\models\BaseUserModel)) { |
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$message = 'the type of user instance must be BaseUserModel or its extended class.'; |
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throw new \yii\base\InvalidParamException($message); |
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} |
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$mbClass = static::buildNoInitModel(); |
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$mbi = $mbClass->multiBlamesClass; |
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return $user->create($mbi::className(), $config); |
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} |
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/** |
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* Add specified blame, or create it before adding if it didn't exist. |
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* @param [multiBlamesClass]|string|array $blame If this is string or |
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* [multiBlamesClass] instance, and the it existed, then will add it. If it |
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* didn't exist, and this is a array, it will be regarded as config array. |
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* Notice, This parameter passed by reference, so it must be a variable! |
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* @param \vistart\Models\models\BaseUserModel $user whose blame. |
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* If null, it will take this blameable model's user. |
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* @return false|array false if blame created failed or not enable this feature. |
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* blames guid array if created and added successfully. |
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* @throws \yii\base\InvalidConfigException |
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* @throws \yii\base\InvalidParamException |
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* @see addBlame() |
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*/ |
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public function addOrCreateBlame(&$blame = null, $user = null) |
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{ |
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if (!is_string($this->multiBlamesClass)) { |
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throw new \yii\base\InvalidConfigException('$multiBlamesClass must be specified if you want to use multiple blameable features.'); |
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} |
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if (is_array($blame)) { |
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if ($user == null) { |
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$user = $this->user; |
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} |
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$blame = static::getOrCreateBlame($blame, $user); |
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if (!$blame->save()) { |
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return false; |
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} |
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return $this->addBlame($blame->guid); |
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} |
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$blameGuid = ''; |
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if (is_string($blame)) { |
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$blameGuid = $blame; |
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} |
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if ($blame instanceof $this->multiBlamesClass) { |
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$blameGuid = $blame->guid; |
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} |
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if (($mbi = static::getBlame($blameGuid)) !== null) { |
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return $this->addBlame($mbi); |
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} |
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return false; |
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} |
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/** |
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* Remove specified blame. |
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* @param [multiBlamesClass] $blame |
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* @return false|array all guids in json format. |
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*/ |
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public function removeBlame($blame) |
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{ |
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if (!is_string($this->multiBlamesAttribute)) { |
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return false; |
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} |
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$blameGuid = ''; |
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if (is_string($blame)) { |
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$blameGuid = $blame; |
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} |
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if ($blame instanceof $this->multiBlamesClass) { |
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$blameGuid = $blame->guid; |
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} |
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$blameGuids = $this->getBlameGuids(true); |
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if (($key = array_search($blameGuid, $blameGuids)) !== false) { |
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unset($blameGuids[$key]); |
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$this->setBlameGuids($blameGuids); |
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} |
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return $this->getBlameGuids(); |
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} |
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/** |
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* Remove all blames. |
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*/ |
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public function removeAllBlames() |
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{ |
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$this->setBlameGuids(); |
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} |
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/** |
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* Count the blames. |
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* @return integer |
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*/ |
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public function getBlamesCount() |
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{ |
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return count($this->getBlameGuids(true)); |
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} |
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/** |
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* Get the guid array of blames. it may check all guids if valid before return. |
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* @param boolean $checkValid determines whether checking the blame is valid. |
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* @return array all guids in json format. |
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*/ |
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public function getBlameGuids($checkValid = false) |
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{ |
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$multiBlamesAttribute = $this->multiBlamesAttribute; |
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if ($multiBlamesAttribute === false) { |
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return []; |
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} |
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$jsonParser = new JsonParser(); |
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$guids = $jsonParser->parse($this->$multiBlamesAttribute, true); |
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if ($checkValid) { |
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$guids = $this->unsetInvalidBlames($guids); |
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} |
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return $guids; |
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} |
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/** |
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* Event triggered when blames list changed. |
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* @param \vistart\Models\events\MultipleBlameableEvent $event |
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*/ |
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public function onBlamesChanged($event) |
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{ |
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$sender = $event->sender; |
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$sender->blamesChanged = $event->blamesChanged; |
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} |
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/** |
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* Remove invalid blame guid from provided guid array. |
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* @param array $guids guid array of blames. |
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* @return array guid array of blames unset invalid. |
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*/ |
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protected function unsetInvalidBlames($guids) |
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{ |
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$checkedGuids = Number::unsetInvalidUuids($guids); |
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$multiBlamesClass = $this->multiBlamesClass; |
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foreach ($checkedGuids as $key => $guid) { |
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$blame = $multiBlamesClass::findOne($guid); |
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if (!$blame) { |
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unset($checkedGuids[$key]); |
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} |
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} |
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$diff = array_diff($guids, $checkedGuids); |
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$eventName = static::$eventMultipleBlamesChanged; |
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$this->trigger($eventName, new MultipleBlameableEvent(['blamesChanged' => !empty($diff)])); |
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return $checkedGuids; |
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} |
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/** |
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* Set the guid array of blames, it may check all guids if valid. |
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* @param array $guids guid array of blames. |
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* @param boolean $checkValid determines whether checking the blame is valid. |
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* @return false|array all guids. |
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*/ |
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public function setBlameGuids($guids = [], $checkValid = true) |
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{ |
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if (!is_array($guids) || $this->multiBlamesAttribute === false) { |
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return null; |
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} |
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if ($checkValid) { |
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$guids = $this->unsetInvalidBlames($guids); |
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} |
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$multiBlamesAttribute = $this->multiBlamesAttribute; |
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$this->$multiBlamesAttribute = json_encode(array_values($guids)); |
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return $guids; |
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} |
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/** |
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* Get blame. |
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* @param string $blameGuid |
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* @return [multiBlamesClass] |
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*/ |
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public static function getBlame($blameGuid) |
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{ |
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$self = static::buildNoInitModel(); |
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if (empty($self->multiBlamesClass) || !is_string($self->multiBlamesClass) || $self->multiBlamesAttribute === false) { |
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return null; |
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} |
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$mbClass = $self->multiBlamesClass; |
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return $mbClass::findOne($blameGuid); |
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} |
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/** |
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* Get or create blame. |
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* @param string|array $blameGuid |
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* @param \vistart\Models\models\BaseUserClass $user |
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* @return [multiBlamesClass]|null |
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*/ |
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public static function getOrCreateBlame($blameGuid, $user = null) |
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{ |
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if (is_string($blameGuid)) { |
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$blameGuid = static::getBlame($blameGuid); |
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if ($blameGuid !== null) { |
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return $blameGuid; |
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} |
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} |
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if (is_array($blameGuid)) { |
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return static::createBlame($user, $blameGuid); |
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} |
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return null; |
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} |
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/** |
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* Get all ones to be blamed by `$blame`. |
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* @param [multiBlamesClass] $blame |
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* @return array |
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*/ |
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public function getBlameds($blame) |
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{ |
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$blameds = static::getBlame($blame->guid); |
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1 |
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if (empty($blameds)) { |
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return null; |
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} |
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$createdByAttribute = $this->createdByAttribute; |
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return static::find()->where([$createdByAttribute => $this->$createdByAttribute]) |
344
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1 |
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->andWhere(['like', $this->multiBlamesAttribute, $blame->guid])->all(); |
345
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} |
346
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347
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/** |
348
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* Get all the blames of record. |
349
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* @return array all blames. |
350
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*/ |
351
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1 |
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public function getAllBlames() |
352
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{ |
353
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1 |
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if (empty($this->multiBlamesClass) || |
354
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1 |
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!is_string($this->multiBlamesClass) || |
355
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1 |
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$this->multiBlamesAttribute === false) { |
356
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return null; |
357
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} |
358
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1 |
|
$multiBlamesClass = $this->multiBlamesClass; |
359
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1 |
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$createdByAttribute = $this->createdByAttribute; |
360
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1 |
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return $multiBlamesClass::findAll([$createdByAttribute => $this->$createdByAttribute]); |
361
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} |
362
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|
363
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/** |
364
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* Get all records which without any blames. |
365
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* @return array all non-blameds. |
366
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*/ |
367
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1 |
|
public function getNonBlameds() |
368
|
|
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{ |
369
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1 |
|
$createdByAttribute = $this->createdByAttribute; |
370
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|
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$cond = [ |
371
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1 |
|
$createdByAttribute => $this->$createdByAttribute, |
372
|
1 |
|
$this->multiBlamesAttribute => static::getEmptyBlamesJson() |
373
|
1 |
|
]; |
374
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1 |
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return static::find()->where($cond)->all(); |
375
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} |
376
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|
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|
377
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/** |
378
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|
|
* Initialize blames limit. |
379
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|
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* @param \yii\base\Event $event |
380
|
|
|
*/ |
381
|
8 |
|
public function onInitBlamesLimit($event) |
382
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|
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{ |
383
|
8 |
|
$sender = $event->sender; |
384
|
8 |
|
if (!is_int($sender->blamesLimit) || $sender->blamesLimit < 1 || $sender->blamesLimit > 10) { |
385
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$sender->blamesLimit = 10; |
386
|
|
|
} |
387
|
8 |
|
} |
388
|
|
|
|
389
|
|
|
/** |
390
|
|
|
* Get the json of empty blames array. |
391
|
|
|
* @return string |
392
|
|
|
*/ |
393
|
1 |
|
public static function getEmptyBlamesJson() |
394
|
|
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{ |
395
|
1 |
|
return json_encode([]); |
396
|
|
|
} |
397
|
|
|
} |
398
|
|
|
|
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