DeAndre Boston

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1// Declare the class 
2class Books {
3    /* constructor() */
4    //Use a constructor method to set up the template for the object
5    constructor(title, author, ISBN, copies){
6        this.title = title;
7        this.author = author
8        this.ISBN = ISBN
9        this.copies = copies
10    }
11    /*avail()*/
12    //Set up a getter method to run the getAvailability method
13    get avail() {
14        return this.getAvailability();
15    }
16
17    /*getAvailability()*/
18    // This method checks if there are no copies, low on stock, or in stock.
19    getAvailability(){
20        if(this.copies === 0){
21            return 'out of stock'
22        } else if ( this.copies < 10 && this.copies > 0){
23            return 'low stock'
24        }
25        return 'In stock'    
26    }
27
28    /*sell()*/
29    /*This method decreases the amount of copies by the number of books sold. You can pass the number of books sold as an 
30    argument. It also defaults to 1 if no argument is given */
31    sell(numSold = 1){
32        this.copies -= numSold
33
34        return `${this.copies} left in inventory`
35    }
36
37    /*restock()*/
38    /* This method will increase the amount of copies based the number you pass in as an aarugument. It also defaults
39     to 5 if no argument is given */
40    restock(numCopies = 5){
41        this.copies += numCopies
42        return `You now have ${this.copies} in stock.`
43    }
44
45    
46}
47
48/* TEST TEST TEST */
49// Instantiate a new book
50let book1 = new Books('Harry Potter & The Sorcerors Stone', 'JK Rowling', '1234asdf', 20 )
51//Checking to make sure the book is all there.
52console.log(book1)
53//checking to see how many books are avail
54console.log(book1.avail())
55// Testing the sell method
56console.log(book1.sell(5))
57//Restock method
58console.log(book1.restock(20))