Jack has books .ts

// const log = (name: string) => {
//   console.log(name)
// }

// log('blabla')

class Logger {
  log(name: string) {
    console.log(name)
  }
}

const logger = new Logger()
logger.log('jack')

class Dog {
  logger = new Logger()
  
  bark() {
    this.logger.log('bark')
    // this.logger.dog('bark')
  }
}

const dog = new Dog()
dog.bark()
// console.log(logger.dark)


interface Reader {
    read: () => void;
}

class Human implements Reader {
    bookShelf?: BookShelf;

    constructor(bookShelf: BookShelf) {
        this.bookShelf = bookShelf
    }

    read() {
        console.log('hmmm')
    }

    hasBooks(): boolean {
        if (this.bookShelf) {
            return this.bookShelf.books.length > 0
        }

        return false
    }
}

class BookShelf {
    constructor(private _books: Book[]) {}

    get books(): Book[] {
        return this._books
    }
}

interface Book {
    name: string;
    // title: string;
    author?: string;
    publisher?: string;
}

const jacksBooks: Book[] = [
    {
        name: 'Bhagavad Gita'
    }
]


const jacksBookShelf = new BookShelf(jacksBooks) 

const jack = new Human(jacksBookShelf)
console.log('jack has books: ', jack.hasBooks())