exercise-3.js

/* 
Below are some restaurants in Glasgow. Each restaurant has a name, the number of total seats, 
the number of customers in the restaurant at the moment and the menu with prices.

We want to build an object to simulate a Restaurant Finder application (see below restaurantFinderApplication).

1) Define a method findAvailableRestaurants which takes a number of people in parameter and returns 
all the restaurant names which have the required number of seats available at the moment.

2) Define a method findRestaurantServingDish which takes a dish name in parameter and returns
all the restaurant names serving this dish.

3) Define a method countNumberOfRestaurantsInArea which takes an area of Glasgow in parameter (center, west),
and returns the number of restaurants in this area.
*/

let restaurant1 = {
    name: "Paesano",
    totalSeats: 10,
    numberOfCustomers: 8,
    address: {
        city: "Glasgow",
        area: "center"
    },
    menu: ["pizza", "calzone", "salad"]
};

let restaurant2 = {
    name: "Ubiquitous Chip",
    totalSeats: 20,
    numberOfCustomers: 10,
    address: {
        city: "Glasgow",
        area: "west"
    },
    menu: ["salad", "chocolate cake", "roast lamb"]
};

let restaurant3 = {
    name: "Monkeyz",
    totalSeats: 15,
    numberOfCustomers: 8,
    address: {
        city: "Glasgow",
        area: "center"
    },
    menu: ["stew", "chocolate cake", "panini"]
};

let restaurants = [restaurant1, restaurant2, restaurant3];

/* 
DO NOT EDIT ANYTHING ABOVE THIS LINE
WRITE YOUR CODE BELOW
*/


let restaurantFinderApplication = {
    applicationName: "Restaurant Finder",
    applicationVersion: "1.0",
    restaurants: restaurants,
    findAvailableRestaurants: function (numberOfPeople) {
        // Complete here
        let availableRestaurants = restaurants.filter(res=> numberOfPeople <= res.totalSeats - res.numberOfCustomers).map(res=> res.name);
        return availableRestaurants;
    },
    findRestaurantServingDish: function (dishName) {
        // Complete here
        let customRestaurant = restaurants.filter(res => res.menu.includes(dishName)).map(res => res.name);
        return customRestaurant;

    },
    countNumberOfRestaurantsInArea: function (area) {
        // Complete here
        let count = 0;
        let countRestaurant = restaurants.filter(res => res.address.area.includes(area)).map(res => count++ )
        return count;
    }
};


/*
DO NOT EDIT ANYTHING BELOW THIS LINE
*/

let restaurantsAvailableFor5People = restaurantFinderApplication.findAvailableRestaurants(5);
console.log(`Find available restaurants for 5 people: Expected result: Ubiquitous Chip,Monkeyz, actual result: ${restaurantsAvailableFor5People}`);

let restaurantsServingSalad = restaurantFinderApplication.findRestaurantServingDish("salad");
console.log(`Find restaurants serving salad: Expected result: Paesano,Ubiquitous Chip, actual result: ${restaurantsServingSalad}`);

let numberOfRestaurantsInCityCentre = restaurantFinderApplication.countNumberOfRestaurantsInArea("center");
console.log(`Number of restaurants in city centre: Expected result: 2, actual result: ${numberOfRestaurantsInCityCentre}`);