如何更好地构建此数据？

Question

我有以下代码：

class Book {
    let title = ""
    let description = ""
    let ebookPath = ""
    let featuredCategories = [FeaturedCategory]()
    let authors = [Author]()
    let publishers = [Publisher]()
    //...
}

class FeaturedCategory {
    let name = ""
    let books = [Book]()
}

class Author {
    let name = ""
    let books = [Book]()
}

class Publisher {
    let name = ""
    let books = [Book]()
}


class Tag {
    let name = ""
    let books = [Book]()
}

从上面的代码中可以看出，有很多重复。如果我添加更多具有相同变量name和books的类，这会变得更加难看。什么是更好的选择？

编辑：我从Firebase下载JSON。这是JSON结构：

...

Answer 1

嗯，这个问题可以通过多种方式得到解答，但我会尝试分享我对此的看法。

首先尝试使用struct代替class，因为通过这种方式，您可以更灵活地构建。

其次使用protocol来创建关系。

小例子：

//Struct insted of class
struct Book {
    //Usage of the let in struct is good practice.
    let title: String
    let description: String
    let ebookPath: String
    let featuredCategories: [FeaturedCategory]
}

//Base protocol
protocol HasBooks {
    var name: String { get }
    var books: [Book] { get }
}

//Strcut that reuqires to implement name and books.
struct FeaturedCategory : HasBooks {
    var name = ""
    var books = [Book]()
}