Christmas Dinner

lass ChristmasDinner {
    constructor(budget) {
        this.budget = budget;
        this.dishes = []
        this.products = []
        this.guests = {}
    }
    get budget() {
        return this._budget
    }
    set budget(value) {
        if (value < 0) {
            throw new Error('The budget cannot be a negative number')
        } else {
            this._budget = Number(value)
        }
    }
    shopping(product) {
        let [productName, price] = product
        price = Number(price)
        if (this.budget < price) {
            throw new Error('Not enough money to buy this product');
        }
        this.products.push(productName)
        this.budget -= price;
        return `You have successfully bought ${productName}!`;
    }

    recipes(recipe) {
        let {
            recipeName,
            productsList
        } = recipe;
        productsList.forEach(p => {

           if(!this.products.includes(p)) {
               throw new Error('We do not have this product');
           }

        });
        this.dishes.push(recipe)
        return `${recipeName} has been successfully cooked!`;
    }

    inviteGuests(name, dish) {
        let curDish = this.dishes.find(d => d.recipeName == dish);
        if (!curDish) {
            throw new Error('We do not have this dish');
        }
        if (this.guests.hasOwnProperty(name)) {
            throw new Error(`This guest has already been invited`);
        }
        this.guests[name] = dish
        return `You have successfully invited ${name}!`;
    }

    showAttendance() {
        let result = [];
        let guestArr = Object.entries(this.guests)
        guestArr.forEach(g => {
            let productArr = this.dishes.find(d => d.recipeName == g[1])
            result.push(`${g[0]} will eat ${g[1]}, which consists of ${productArr.productsList.join(', ')}`)
        })

        return result.join('\n')
    }
}