Feature/music genre/mike

[Mike47ip]

The following project requirements were satisfied:

• Create MusicAlbum class in a separate .rb file.

• Create Genre class with an association to the Item class (in a separate .rb file).

• All MusicAlbum class properties visible in the diagram should be defined and set up in the constructor method.

• All Genre class properties visible in the diagram should be defined and set up in the constructor method.

• - Implement methods:

  • add_item method in the Genre class
    • should take an instance of the Item class as an input
    • should add the input item to the collection of items
    • should add self as a property of the item object (by using the correct setter from the item object)
  • can_be_archived?() in the MusicAlbum class
    • should override the method from the parent class
    • should return true if parent's method returns true AND if on_spotify equals true
    • otherwise, it should return false

• - The following options should be available:

  • List all music albums
  • List all genres (e.g 'Comedy', 'Thriller')
  • Add a music album