Role Functional Assessment K001

CouponShoppingCart.js

let shoppingingcart = require("./ShoppingCart.js");

let items = function(name, price) {
  this.name = name;
  this.price = price;
};

let Oranges = new items("oranges", 10);
let Bananas = new items("Bananas", 10);
let Rice = new items("Rice", 10);
let Moimoi = new items("moimoi", 150);
const blog = new shoppingingcart(1000);
class CouponShoppingCart extends shoppingingcart {
  constructor(totalCost) {
    super(totalCost);
    this.totalCost = totalCost;
  }

  subtractDiscount(coupon, paid_amount) {
    console.log(goods.list);
    console.log("delivery fee " + this.delivery());
    console.log("net Total " + goods.netTotal());
    console.log(`Coupon of ${coupon} is applied`);

    console.log("subTotal " + goods.grossTotal(coupon));
    console.log("Total delivery fee " + goods.calculateDeliveryFee());
    try {
      let finalPayment = goods.checkout(coupon, paid_amount);
      if (finalPayment > 0) {
        console.log("Your change is " + finalPayment);
      }
    } catch (error) {
      console.log("Error encounter during " + finalPayment + "computation");
    }
  }
}

goods = new CouponShoppingCart();
goods.addItem(Oranges, 3);
goods.addItem(Bananas, 2);
goods.addItem(Rice, 12);
goods.subtractDiscount(1000, 10);

ShoppingCart.js

var items = function(name, price) {
  this.name = name;
  this.price = price;
};

class ShoppingCart {
  constructor(totalCost) {
    this.list = [];
    this.totalCost = totalCost;
  }

  // additem
  addItem(item, quantity) {
    var element = {};
    element.name = item.name;
    element.price = item.price;
    element.quantity = quantity;
    this.list.push(element);
    console.log(
      "Add " +
        quantity +
        " " +
        item.name +
        " to the cart at a price of " +
        item.price
    );
    return this.list;
  }

  delivery() {
    var deliveryCost = 50;

    return deliveryCost;
  }

  netTotal() {
    var total = 0;

    for (var i = 0; i < this.list.length; i++) {
      total += this.list[i].price * this.list[i].quantity;
    }
    this.totalCost = total;
    return this.totalCost;
  }

  grossTotal(coupon) {
    var totalgross = 0;
    totalgross = this.netTotal() + this.calculateDeliveryFee() - coupon;
    return totalgross;
  }

  calculateDeliveryFee() {
    var deliver = 0;
    for (var i = 0; i < this.list.length; i++) {
      deliver += this.list[i].quantity * this.delivery();
    }
    return deliver;
  }

  removeItem(item, quantity) {
    try {
      if (isNaN(item)) {
        if (!isNaN(quantity)) {
          var index = this.list.findIndex(x => x.name == na);

          if (this.list[index].quantity > quantity) {
            this.list[index].quantity -= quantity;
            console.log("goods" + index);
            console.log("=== Removing " + item + ". The new price is: ===");
            console.log(this.netTotal());
            // console.log( "mm " + this.list);
            return this.netTotal();
          } else if (this.list[index].quantity === quantity) {
            this.list.splice(index, 1);
            console.log("=== Removing " + item + ". The new price is: ===");

            console.log("value = " + index);
            return this.netTotal();
          } else {
            console.log(
              "We only have " + this.list[index].quantity + " unit(s) currently"
            );
            console.log("quantity in cart is " + quantity);
            return this.netTotal();
          }
        } else {
          console.log(" Unacceptable value inputted for quantity ");
          quantity = 0;
        }
      } else {
        console.log(" Unacceptable value inputted ");
        quantity = 0;
      }

      console.log(this.list);
      return this.netTotal();
    } catch (error) {
      console.log(" bad ");
    }

    return this.netTotal();
  }

  checkout(coupon, paid_amount) {
    var paidAmount = 0;
    try {
      if (!isNaN(paid_amount)) {
        if (paid_amount > this.grossTotal(coupon)) {
          paidAmount = paid_amount - this.grossTotal(coupon);
          if (paidAmount >= 1) {
            console.log(
              "Cost of goods is: " +
                this.netTotal() +
                "\n" +
                "delivery fee is: " +
                this.calculateDeliveryFee()
            );
            console.log(
              "Amount paid is: " +
                paid_amount +
                "\n" +
                "Your balance is " +
                paidAmount
            );
            console.log("Thanks for patronage");
            return paidAmount;
          } else {
            console.log("Thanks for patronage");
            return paidAmount;
          }
        } else {
          this.list = [];
          console.log("insufficient fund");
          console.log(this.list);
          console.log(paidAmount);
          return paidAmount;
        }
      } else {
        console.log(" Unable to compute checkout");
      }
    } catch (error) {
      console.log("Error encounter unable to compute checkout");
    }
    return paidAmount;
  }
}

shopping = new ShoppingCart();
// shopping.addItem({ name: "Oranges", price: 100 }, 3);

module.exports = ShoppingCart;