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<?php |
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namespace yii2mod\cart; |
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use Yii; |
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use yii\base\Component; |
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use yii\base\InvalidParamException; |
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use yii2mod\cart\models\CartItemInterface; |
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use yii2mod\cart\storage\StorageInterface; |
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/** |
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* Class Cart provides basic cart functionality (adding, removing, clearing, listing items). You can extend this class and |
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* override it in the application configuration to extend/customize the functionality |
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* |
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* @package yii2mod\cart |
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*/ |
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class Cart extends Component |
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{ |
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/** |
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* @var string CartItemInterface class name |
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*/ |
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const ITEM_PRODUCT = '\yii2mod\cart\models\CartItemInterface'; |
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/** |
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* Override this to provide custom (e.g. database) storage for cart data |
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* |
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* @var string|\yii2mod\cart\storage\StorageInterface |
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*/ |
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public $storageClass = '\yii2mod\cart\storage\SessionStorage'; |
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/** |
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* @var array cart items |
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*/ |
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protected $items; |
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/** |
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* @var StorageInterface |
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*/ |
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private $_storage; |
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/** |
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* @inheritdoc |
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*/ |
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public function init() |
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{ |
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$this->clear(false); |
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$this->setStorage(Yii::createObject($this->storageClass)); |
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$this->items = $this->storage->load($this); |
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} |
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/** |
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* Assigns cart to logged in user |
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* |
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* @param string |
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* @param string |
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*/ |
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public function reassign($sessionId, $userId) |
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{ |
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if (get_class($this->getStorage()) === 'yii2mod\cart\storage\DatabaseStorage') { |
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if (!empty($this->items)) { |
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$storage = $this->getStorage(); |
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$storage->reassign($sessionId, $userId); |
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self::init(); |
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} |
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} |
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} |
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/** |
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* Delete all items from the cart |
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* |
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* @param bool $save |
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* |
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* @return $this |
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*/ |
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public function clear($save = true): self |
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{ |
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$this->items = []; |
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$save && $this->storage->save($this); |
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return $this; |
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} |
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/** |
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* @return StorageInterface |
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*/ |
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public function getStorage(): StorageInterface |
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{ |
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return $this->_storage; |
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} |
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/** |
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* @param mixed $storage |
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*/ |
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public function setStorage($storage) |
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{ |
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$this->_storage = $storage; |
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} |
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/** |
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* Add an item to the cart |
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* |
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* @param models\CartItemInterface $element |
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* @param bool $save |
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* |
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* @return $this |
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*/ |
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public function add(CartItemInterface $element, $save = true): self |
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{ |
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$this->addItem($element); |
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$save && $this->storage->save($this); |
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return $this; |
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} |
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/** |
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* @param \yii2mod\cart\models\CartItemInterface $item |
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*/ |
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protected function addItem(CartItemInterface $item) |
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{ |
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$uniqueId = $item->getUniqueId(); |
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$this->items[$uniqueId] = $item; |
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} |
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/** |
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* Removes an item from the cart |
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* |
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* @param string $uniqueId |
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* @param bool $save |
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* |
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* @throws \yii\base\InvalidParamException |
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* |
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* @return $this |
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*/ |
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public function remove($uniqueId, $save = true): self |
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{ |
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if (!isset($this->items[$uniqueId])) { |
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throw new InvalidParamException('Item not found'); |
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} |
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unset($this->items[$uniqueId]); |
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$save && $this->storage->save($this); |
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return $this; |
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} |
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/** |
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* @param string $itemType If specified, only items of that type will be counted |
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* |
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* @return int |
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*/ |
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public function getCount($itemType = null): int |
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{ |
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return count($this->getItems($itemType)); |
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} |
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/** |
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* Returns all items of a given type from the cart |
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* |
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* @param string $itemType One of self::ITEM_ constants |
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* |
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* @return CartItemInterface[] |
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*/ |
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public function getItems($itemType = null): array |
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{ |
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$items = $this->items; |
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if (!is_null($itemType)) { |
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$items = array_filter( |
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$items, |
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function ($item) use ($itemType) { |
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/* @var $item CartItemInterface */ |
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return is_a($item, $itemType); |
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} |
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); |
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} |
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return $items; |
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} |
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/** |
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* Finds all items of type $itemType, sums the values of $attribute of all models and returns the sum. |
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* |
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* @param string $attribute |
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* @param string|null $itemType |
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* |
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* @return int |
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*/ |
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public function getAttributeTotal($attribute, $itemType = null): int |
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{ |
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$sum = 0; |
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foreach ($this->getItems($itemType) as $model) { |
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$sum += $model->{$attribute}; |
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} |
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return $sum; |
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} |
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} |
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If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue.