[Swift] Enum

import UIKit
import Foundation

//Enumerations

//enum
//타입분류

// 도서관 -> 항목 -> 소설, 문제집
//분류만 하고 싶다.

enum BookType
{
    case fiction
    case comics
    case workbook
}



enum BookType2
{
    case fiction2(title: String, price: Int, year: Int)
    case comics2(title: String, price: Int, year: Int)
    case workbook2(title: String, price: Int, year: Int)
}

extension BookType2{
    var typeName: String {
        switch self {
        case .comics2:
            return "comics"
        case .fiction2:
            return "fiction"
        default:
            return ""
        }
    }
}

//기본타입 설정
var bookStyle = BookType.comics

var bookStype2 : BookType?
var books = [BookType]()
var books2 = [BookType2]()
func saveBook(book: BookType){
    
    switch book {
    
    case .comics:
        books.append(book)
    case.fiction:
        books.append(book)
    default:
        books.append(book)
    }
}
 

func saveBook2(book: BookType){
    books.append(book)
}

func saveBook3(book: BookType2){
    books2.append(book)
}

saveBook2(book: .comics)
saveBook2(book: .workbook)
saveBook2(book: .workbook)

func loadBook(book: BookType) -> [BookType]{
    var tempBooks = [BookType]()
    
    for item in books {
        if item == book{
            tempBooks.append(item)
        }
    }
    
    return tempBooks
}


loadBook(book: .workbook)

saveBook3(book: .comics2(title: "aaa", price: 5000, year: 2020))
saveBook3(book: .comics2(title: "bbb", price: 6000, year: 2020))
saveBook3(book: .comics2(title: "ccc", price: 7000, year: 2021))

for book in books2
{
    if case let BookType2.comics2(a,b,c) = book{
        print(a,book.typeName)
    }
//    switch book {
//        //안쓰는것 _언더바 처리
//    case let .comics2(a, b, _):
//        print(a)
//        print(b)
//    default:
//        break;
//    }
}