Codecademy export

app.js

class Media {
  constructor(title) {
    this._title = title;
    this._isCheckedOut = false;
    this._rating = [];
  }
  
  get title() {
    return this._title;
  } 

  get isCheckedOut() {
    return this._isCheckedOut;
  }

  get rating() {
    return this._rating;
  }
  
  set isCheckedOut(checkOut) {
    this._isCheckedOut = checkOut;
  }
  
  toggleCheckOutStatus() {
    this.isCheckedOut = !this.isCheckedOut 
  }
 
    getAverageRating() {
      let sum = this.rating.reduce((currentSum, rating) => currentSum + rating, 0);
      return sum/this.rating.length;
  }

  addRating(newRating) {
    return this.rating.push(newRating);
  }
}

class Book extends Media {
  constructor(title, author, pages) {
    super(title);
    this._author = author;
    this._pages = pages;
  } 
  
  get author() {
    return this._author;
  }
  
  get pages() {
    return this._pages;
  }
}

class Movie extends Media {
  constructor(title, director, runTime) {
    super(title);
    this._director = director;
    this._runTime = runTime;
  }
  
  get director() {
    return this._director;
  }
  
  get runTime() {
    return this._runTime;
  }
}

const historyOfEverything = new Book('A Short History of Nearly Everything', 'Bill Bryson', 544);

historyOfEverything.toggleCheckOutStatus();

console.log(historyOfEverything.isCheckedOut);

historyOfEverything.addRating(4);
historyOfEverything.addRating(5);
historyOfEverything.addRating(5);

console.log(historyOfEverything.getAverageRating());

const speed = new Movie('Speed', 'Jan de Bont', 116);

speed.toggleCheckOutStatus();
speed.toggleCheckOutStatus();

console.log(speed.isCheckedOut);

speed.addRating(1);
speed.addRating(1);
speed.addRating(5);

console.log(speed.getAverageRating());