SwiftUI Burger Builder Sample - patterns

gistfile1.txt

//
//  CartView.swift
//  RTSPStreamer
//
//  Created by Darren Hurst on 2023-02-05.
//

import Foundation
import SwiftUI

struct CartView: View {
    let burgers: [BurgerBuilder] = [HamburgerBuilder(), CheeseburgerBuilder(), BaconburgerBuilder()]
     @State var burger: Burger = Burger(burger: BaconburgerBuilder())
    
 

    var body: some View {
        // returns View Type
        LazyVStack {
           AnyView( self.showBurgerOptions() )
           AnyView( burger.showBurgerView() )
        }.onAppear() {
            burger.tomatoes = false
        }.standard().frame(alignment:.top)
    }
    /* Binding func */
    func showBurgerOptions() -> any View {
        @State var scale = 0.5
        return VStack {
            Text("Burger Type: \($burger.name.wrappedValue)")
            ZStack {
                Image("BunTop")
            }.zIndex(2).offset(y:30)
            ZStack {
                Image("Tomatoe").zIndex(5).offset(y:-40).opacity(burger.tomatoes ? 0.9: 0)
                    .animation(.easeOut(duration: 1), value:  scale)
                Image("bacon").zIndex(4).offset(y:-35)
                Image("cheese").zIndex(3).offset(y:-25)
                Image("patties").zIndex(1).offset(y:-15)
                Image("BunBottom")
            } 
            Toggle("Totamtoes: ", isOn: $burger.tomatoes)
            Toggle("Onions: ", isOn: $burger.onions)
            Toggle("Lettuce: ", isOn: $burger.lettuce)
            Toggle("Ketchup: ", isOn: $burger.ketchup)
        }
    }
    
}
struct PreviewBurger : PreviewProvider {
    let myBurger: Burger = Burger(burger: BaconburgerBuilder())
    static var previews: some View {
        CartView()
    }
}

protocol BurgerBuilder {
    var name: String { get set}
    var lettuce: Bool{ get set }
    var tomatoes: Bool { get set }
    var onions: Bool { get set }
    var patties : Int { get set }
    var ketchup : Bool { get set }
    var mustard : Bool { get set }
    var bacon: Bool { get set }
    var cheese: Bool { get set }
    
}

struct Burger: BurgerBuilder {
    var name: String
    var lettuce: Bool
    var tomatoes: Bool
    var onions: Bool
    var patties: Int
    var ketchup: Bool
    var mustard: Bool
    var bacon: Bool
    var cheese: Bool
    
    init(burger: BurgerBuilder) {
        self.name = burger.name
        self.lettuce = burger.lettuce
        self.tomatoes = burger.tomatoes
        self.onions = burger.onions
        self.patties = burger.patties
        self.ketchup = burger.ketchup
        self.mustard = burger.mustard
        self.bacon = burger.bacon
        self.cheese = burger.cheese
    }
    
    func showBurgerView() -> any View {
        return
            VStack {
                Text("\(name)")
                Text("Tomatoes: \(String(tomatoes))")
                Text("Onions: \(String(onions))")
                Text("Lettuce: \(String(lettuce))")
                Text("Ketchup: \(String(ketchup))")
            }

    }
    
    
}

struct HamburgerBuilder: BurgerBuilder {
    var name: String = "Basic Burger"
    var lettuce: Bool = true
    var tomatoes: Bool = true
    var onions: Bool = true
    var patties: Int = 1
    var ketchup: Bool = true
    var mustard: Bool = true
    var bacon: Bool = false
    var cheese: Bool = false
}

struct CheeseburgerBuilder: BurgerBuilder {
    var name: String = "Cheese Burger"
    var lettuce: Bool = true
    var tomatoes: Bool = true
    var onions: Bool = true
    var patties: Int = 1
    var ketchup: Bool = true
    var mustard: Bool = true
    var bacon: Bool = false
    var cheese: Bool = true
}

struct BaconburgerBuilder: BurgerBuilder {
    var name: String = "Bacon Burger"
    var lettuce: Bool = true
    var tomatoes: Bool = true
    var onions: Bool = true
    var patties: Int = 1
    var ketchup: Bool = true
    var mustard: Bool = true
    var bacon: Bool = false
    var cheese: Bool = true
}

BurgerBuilderPattern.mov