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| // parent Class | |
| class Media { | |
| constructor(title) { | |
| this._title = title; | |
| this._isCheckOut = false; | |
| this._ratings = []; | |
| this._songs = {} | |
| } | |
| get title() { | |
| return this._title; | |
| } | |
| get isCheckOut() { | |
| return this._isCheckOut; | |
| } | |
| get ratings() { | |
| return this._ratings; | |
| } | |
| get songs() { | |
| return this._songs; | |
| } | |
| set isCheckOut(check) { | |
| this.isCheckOut = check; | |
| } | |
| toggleCheckOutStatus() { | |
| this._isCheckOut = !this._isCheckOut; | |
| } | |
| getAverageRating() { | |
| const arrayRatings = this._ratings.length; | |
| let ratingSum = this._ratings.reduce((currentSum, rating) => currentSum + rating, 0); | |
| return ratingSum / arrayRatings; | |
| } | |
| addRating(newRating) { | |
| if (Number.isInteger(newRating)) { | |
| if (newRating >= 1 && 5 >= newRating) { | |
| this._ratings.push(newRating); | |
| } | |
| } else { | |
| console.log('There was an invalid rating submitted for ' + this._title); | |
| } | |
| } | |
| addSong(newSong) { | |
| this._songs.push(newSong); | |
| } | |
| }; | |
| // subclasses | |
| // Book | |
| 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; | |
| } | |
| }; | |
| // Movie | |
| class Movie extends Media { | |
| constructor(director, title, runTime) { | |
| super(title); | |
| this._director = director; | |
| this._runTime = runTime; | |
| } | |
| get director() { | |
| return this._director; | |
| } | |
| get runTime() { | |
| return this._runTime; | |
| } | |
| }; | |
| // CD | |
| class CD extends Media { | |
| constructor(title, author, songs) { | |
| super(title); | |
| this._author = author; | |
| this._songs = []; | |
| } | |
| get author() { | |
| return this._author; | |
| } | |
| get songs() { | |
| return this.songs; | |
| } | |
| shuffle() { | |
| } | |
| } | |
| // CD instance | |
| console.log("***CD Instance***"); | |
| const cd = new CD('Ya Laila', 'Cheb Khaled', 'kifhalk lyom') | |
| cd.toggleCheckOutStatus(); | |
| console.log(cd.isCheckOut); | |
| cd.addRating(4) | |
| cd.addRating(4) | |
| cd.addRating(5) | |
| console.log(cd.getAverageRating()) | |
| // Book instance | |
| console.log("***Book Instance***") | |
| const historyOfEverything = new Book('A Short History of Nearly', 'Bill Bryson', 544); | |
| historyOfEverything.toggleCheckOutStatus(); | |
| console.log(historyOfEverything.isCheckOut); | |
| historyOfEverything.addRating(4); | |
| historyOfEverything.addRating(5); | |
| historyOfEverything.addRating(5); | |
| historyOfEverything.getAverageRating; | |
| console.log(historyOfEverything.getAverageRating()); | |
| // Movie instance | |
| console.log("***Movie Instance***") | |
| const speed = new Movie('Jan de Bont', 'Speed', 116); | |
| speed.toggleCheckOutStatus(); | |
| console.log(speed.isCheckOut); | |
| speed.addRating(1); | |
| speed.addRating(1); | |
| speed.addRating(5); | |
| console.log(speed.getAverageRating()); | |
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