Clean_code_course/Polymorphism.ts at master · FirelCrafter/Clean_code_course · GitHub

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type Purchase = any;

let Logistics: any;

interface Delivery {
  deliverProduct();
  trackProduct();
}

class DeliveryImplementation {
  protected purchase: Purchase;

  constructor(purchase: Purchase) {
    this.purchase = purchase;
  }
}

class ExpressDelivery extends DeliveryImplementation implements Delivery {
  deliverProduct() {
    Logistics.issueExpressDelivery(this.purchase.product);
    }
  trackProduct() {
      Logistics.trackExpressDelivery(this.purchase.product);
    }
}

class InsuredDelivery extends DeliveryImplementation implements Delivery {
  deliverProduct() {
    Logistics.issueInsuredDelivery(this.purchase.product);
    }
  trackProduct() {
      Logistics.trackInsuredDelivery(this.purchase.product);
    }
}

class StandardDelivery extends DeliveryImplementation implements Delivery {
  deliverProduct() {
    Logistics.issueStandardDelivery(this.purchase.product);
    }
  trackProduct() {
      Logistics.trackStandardDelivery(this.purchase.product);
    }
}

function createDelivery(purchase) {
  if (this.purchase.deliveryType === 'express') {
    delivery = new ExpressDelivery(purchase);
  } else if (this.purchase.deliveryType === 'insured') {
    delivery = new InsuredDelivery(purchase);
  } else {
    delivery = new StandardDelivery(purchase);
  }
  return delivery
}

let delivery: Delivery = createDelivery({});

delivery.deliverProduct();