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207 lines
6.1 KiB
207 lines
6.1 KiB
<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\behaviors; |
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use yii\base\InvalidConfigException; |
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use yii\db\BaseActiveRecord; |
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use yii\helpers\Inflector; |
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use yii\validators\UniqueValidator; |
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use Yii; |
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/** |
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* SluggableBehavior automatically fills the specified attribute with a value that can be used a slug in a URL. |
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* |
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* To use SluggableBehavior, insert the following code to your ActiveRecord class: |
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* |
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* ```php |
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* use yii\behaviors\SluggableBehavior; |
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* |
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* public function behaviors() |
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* { |
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* return [ |
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* [ |
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* 'class' => SluggableBehavior::className(), |
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* 'attribute' => 'title', |
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* // 'slugAttribute' => 'slug', |
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* ], |
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* ]; |
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* } |
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* ``` |
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* |
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* By default, SluggableBehavior will fill the `slug` attribute with a value that can be used a slug in a URL |
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* when the associated AR object is being validated. If your attribute name is different, you may configure |
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* the [[slugAttribute]] property like the following: |
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* |
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* ```php |
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* public function behaviors() |
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* { |
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* return [ |
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* [ |
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* 'class' => SluggableBehavior::className(), |
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* 'slugAttribute' => 'alias', |
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* ], |
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* ]; |
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* } |
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* ``` |
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* |
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* @author Alexander Kochetov <creocoder@gmail.com> |
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* @author Paul Klimov <klimov.paul@gmail.com> |
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* @since 2.0 |
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*/ |
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class SluggableBehavior extends AttributeBehavior |
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{ |
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/** |
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* @var string the attribute that will receive the slug value |
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*/ |
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public $slugAttribute = 'slug'; |
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/** |
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* @var string|array the attribute or list of attributes whose value will be converted into a slug |
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*/ |
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public $attribute; |
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/** |
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* @var string|callable the value that will be used as a slug. This can be an anonymous function |
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* or an arbitrary value. If the former, the return value of the function will be used as a slug. |
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* The signature of the function should be as follows, |
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* |
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* ```php |
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* function ($event) |
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* { |
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* // return slug |
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* } |
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* ``` |
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*/ |
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public $value; |
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/** |
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* @var boolean whether to ensure generated slug value to be unique among owner class records. |
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* If enabled behavior will validate slug uniqueness automatically. If validation fails it will attempt |
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* generating unique slug value from based one until success. |
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*/ |
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public $ensureUnique = false; |
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/** |
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* @var array configuration for slug uniqueness validator. Parameter 'class' may be omitted - by default |
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* [[UniqueValidator]] will be used. |
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* @see UniqueValidator |
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*/ |
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public $uniqueValidator = []; |
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/** |
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* @var callable slug unique value generator. It is used in case [[ensureUnique]] enabled and generated |
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* slug is not unique. This should be a PHP callable with following signature: |
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* |
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* ```php |
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* function ($baseSlug, $iteration, $model) |
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* { |
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* // return uniqueSlug |
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* } |
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* ``` |
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* |
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* If not set unique slug will be generated adding incrementing suffix to the base slug. |
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*/ |
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public $uniqueSlugGenerator; |
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/** |
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* @inheritdoc |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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if (empty($this->attributes)) { |
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$this->attributes = [BaseActiveRecord::EVENT_BEFORE_VALIDATE => $this->slugAttribute]; |
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} |
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if ($this->attribute === null && $this->value === null) { |
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throw new InvalidConfigException('Either "attribute" or "value" property must be specified.'); |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function getValue($event) |
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{ |
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$isNewSlug = true; |
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if ($this->attribute !== null) { |
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$attributes = (array)$this->attribute; |
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/* @var $owner BaseActiveRecord */ |
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$owner = $this->owner; |
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if (!$owner->getIsNewRecord() && !empty($owner->{$this->slugAttribute})) { |
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$isNewSlug = false; |
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foreach ($attributes as $attribute) { |
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if ($owner->isAttributeChanged($attribute)) { |
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$isNewSlug = true; |
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break; |
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} |
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} |
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} |
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if ($isNewSlug) { |
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$slugParts = []; |
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foreach ($attributes as $attribute) { |
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$slugParts[] = $owner->{$attribute}; |
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} |
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$slug = Inflector::slug(implode('-', $slugParts)); |
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} else { |
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$slug = $owner->{$this->slugAttribute}; |
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} |
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} else { |
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$slug = parent::getValue($event); |
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} |
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if ($this->ensureUnique && $isNewSlug) { |
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$baseSlug = $slug; |
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$iteration = 0; |
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while (!$this->validateSlug($slug)) { |
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$iteration++; |
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$slug = $this->generateUniqueSlug($baseSlug, $iteration); |
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} |
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} |
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return $slug; |
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} |
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/** |
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* Checks if given slug value is unique. |
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* @param string $slug slug value |
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* @return boolean whether slug is unique. |
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*/ |
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private function validateSlug($slug) |
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{ |
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/* @var $validator UniqueValidator */ |
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/* @var $model BaseActiveRecord */ |
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$validator = Yii::createObject(array_merge( |
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[ |
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'class' => UniqueValidator::className() |
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], |
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$this->uniqueValidator |
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)); |
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$model = clone $this->owner; |
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$model->clearErrors(); |
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$model->{$this->slugAttribute} = $slug; |
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$validator->validateAttribute($model, $this->slugAttribute); |
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return !$model->hasErrors(); |
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} |
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/** |
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* Generates slug using configured callback or increment of iteration. |
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* @param string $baseSlug base slug value |
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* @param integer $iteration iteration number |
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* @return string new slug value |
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* @throws \yii\base\InvalidConfigException |
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*/ |
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private function generateUniqueSlug($baseSlug, $iteration) |
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{ |
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if (is_callable($this->uniqueSlugGenerator)) { |
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return call_user_func($this->uniqueSlugGenerator, $baseSlug, $iteration, $this->owner); |
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} else { |
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return $baseSlug . '-' . ($iteration + 1); |
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} |
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} |
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}
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