.swift

//
//  ContentView.swift
//  Shared
//
//  Created by Mohammad Azam on 6/30/20.
//

import SwiftUI

struct Category: Identifiable {
    let id: UUID = UUID()
    let name: String
    let products: [Product]
}

extension Category {
    
    static func all() -> [Category] {
        
        let animals = [Product(name: "🐶"),Product(name: "🐰")]
        
        let fruits = [Product(name: "🍑"), Product(name: "🍉"), Product(name: "🍌")]
                
        return [Category(name: "Animals", products: animals), Category(name: "Fruits", products: fruits)]
        
    }
    
}

struct Product: Identifiable {
    let id: UUID = UUID()
    let name: String
}

struct ContentView: View {
  
    var body: some View {
        List {
            
            ForEach(Category.all()) { category in
                Section(header: Text(category.name)) {
                    OutlineGroup(category, children: \.products) { product in
                        Text(product.name)
                    }
                }
            }
            
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}