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<?php |
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namespace hipanel\modules\finance\cart; |
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use hipanel\modules\finance\logic\Calculator; |
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use hipanel\modules\finance\models\CalculableModelInterface; |
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use hiqdev\yii2\cart\CartPositionInterface; |
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use hiqdev\yii2\cart\Module; |
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use hiqdev\yii2\cart\ShoppingCart; |
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use yii\base\Widget; |
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abstract class RelatedPosition implements RelatedPositionInterface |
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{ |
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/** @var CartPositionInterface */ |
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public $mainPosition; |
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/** @var ShoppingCart */ |
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public $cart; |
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/** @var CalculableModelInterface */ |
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public $relatedPosition; |
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/** @var Widget */ |
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private $widget; |
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public function __construct(CartPositionInterface $mainPosition) |
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{ |
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$this->cart = Module::getInstance()->getCart(); |
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$this->mainPosition = $mainPosition; |
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$this->relatedPosition = $this->createRelatedPosition(); |
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$currentPositions = $this->cart->getPositions(); |
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if (isset($currentPositions[$this->relatedPosition->getId()])) { |
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$relatedPosition = $currentPositions[$this->relatedPosition->getId()]; |
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$this->relatedPosition = $relatedPosition; |
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} else { |
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$this->calculate(); |
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} |
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} |
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/** @inheritDoc */ |
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public function render(): string |
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{ |
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if (!$this->widget) { |
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$this->widget = $this->getWidget(); |
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} |
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return $this->widget->run(); |
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} |
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protected function calculate(): void |
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{ |
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$position = $this->relatedPosition; |
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$calculator = new Calculator([$position]); |
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$calculationId = $position->getId(); |
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$calculation = $calculator->getCalculation($calculationId); |
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$value = $calculation->forCurrency($this->cart->getCurrency()); |
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$position->setPrice($value->price); |
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$position->setValue($value->value); |
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$position->setCurrency($value->currency); |
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$this->relatedPosition = $position; |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: