SwiftUI-EmojiGame.swift

import SwiftUI

struct ContentView: View {
    
    @State var timeRemaining = 10
    @State var timer = Timer.publish (every: 1, on: .main, in: .common).autoconnect()
    
    @State var emojiStatus = EmojiSearch.searching
    
    var emojiObjects = [EmojiModel(emoji: "💻", emojiName: "laptop"),
                        EmojiModel(emoji: "😎", emojiName: "glasses"),
                        EmojiModel(emoji: "📚", emojiName: "book"),
                        EmojiModel(emoji: "✍️", emojiName: "pen"),
                        EmojiModel(emoji: "📲", emojiName: "iPod")
                       ]
        
    @State var currentLevel = 0
    @State var showNext = false
    
    var body: some View {
        
        ZStack {
            
            if showNext || emojiStatus == .found{
                Button(action: {
                    
                    if self.currentLevel == self.emojiObjects.count - 1{
                        self.emojiStatus = .gameOver
                    }
                    else{
                        self.currentLevel = self.currentLevel + 1
                        self.timeRemaining = 10
                        self.emojiStatus = .searching
                        self.showNext = false
                        self.instantiateTimer()
                    }
                    
                }) {
                    Text("NEXT")
                        .padding()
                        .background(Color.green)
                        .foregroundColor(Color.white)
                        .cornerRadius(6)
                }
                
            }
            else{
                CustomCameraRepresentable(emojiString: emojiObjects[currentLevel].emojiName, emojiFound: $emojiStatus)
            }
            VStack(alignment: .leading, spacing: 16){
                Spacer()
                if self.emojiStatus == .gameOver{
                    Button(action: {
                        self.currentLevel = 0
                        self.timeRemaining = 10
                        self.emojiStatus = .searching
                        self.showNext = false
                        self.instantiateTimer()

                    }) {
                        Text("GAME OVER. TAP to RETRY")
                            .padding()
                            .background(Color.green)
                            .foregroundColor(Color.white)
                            .cornerRadius(3)
                    }
                }
                else{
                    if self.emojiStatus == .searching{
                        
                        Text("\(timeRemaining)")
                            .font(.system(size:50, design: .rounded))
                            .fontWeight(.bold)
                            .foregroundColor(.yellow)
                            .onReceive(timer) { _ in
                                
                                if self.emojiStatus == .found{
                                    self.cancelTimer()
                                    self.timeRemaining = 10
                                    
                                }
                                else {
                                    if self.timeRemaining > 0 {
                                        self.timeRemaining -= 1
                                    }
                                    else{
                                        self.emojiStatus = .notFound
                                        self.showNext = true
                                    }
                                }
                        }
                    }
                    
                    emojiResultText()
                }
            }
        }
    }
}