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1 //
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2 // GameProtocol.swift
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3 // GeoQuiz
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4 //
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5 // Created by Dennis Concepción Martín on 18/9/22.
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6 //
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7
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8 import Foundation
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9 import SwiftUI
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10 import AVFAudio
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11
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12 protocol Game: ObservableObject {
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13
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14 // Define generic type
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15 associatedtype T: Equatable
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16
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17 // Game
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18 var data: [String: T] { get set}
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19 var dataAsked: [String: T] { get set }
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20 var correctAnswer: (key: String, value: T) { get set }
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21
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22 // User
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23 var userChoices: [String: T] { get set }
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24 var userScore: Int { get set }
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25 var userLives: Int { get set }
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26 var correctAnswers: [String: T] { get set }
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27 var wrongAnswers: [String: T] { get set }
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28
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29 // Alerts
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30 var alertTitle: String { get set }
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31 var alertMessage: String { get set }
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32 var showingGameOverAlert: Bool { get set }
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33 var showingEndGameAlert: Bool { get set }
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34 var showingWrongAnswerAlert: Bool { get set }
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35 var showingExitGameAlert: Bool { get set }
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36
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37 // Animations
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38 var scoreScaleAmount: Double { get set }
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39 var livesScaleAmount: Double { get set }
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40
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41 // Sound effects
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42 var player: AVAudioPlayer? { get set }
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43
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44 func selector()
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45 }
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46
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47 extension Game {
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48 var questionCounter: Int {
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49 dataAsked.count
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50 }
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51
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52 func askQuestion(selector: () -> Void) {
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53 guard questionCounter < data.count else {
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54 alertTitle = "⭐️ Congratulations ⭐️"
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55 alertMessage = "You completed the game."
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56 showingEndGameAlert = true
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57
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58 return
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59 }
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60
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61 selector()
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62 }
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63
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64 func answer(_ choice: (key: String, value: T), selector: () -> Void) {
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65 if correctAnswer == choice {
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66 hapticSuccess()
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67 playSound("correctAnswer")
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68
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69 withAnimation(.easeIn(duration: 0.5)) {
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70 scoreScaleAmount += 1
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71 userScore += 1
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72 }
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73
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74 correctAnswers[correctAnswer.key] = correctAnswer.value
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75 askQuestion {
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76 selector()
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77 }
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78 } else {
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79 hapticError()
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80 playSound("wrongAnswer")
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81
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82 withAnimation(.easeIn(duration: 0.5)) {
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83 livesScaleAmount += 1
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84 userLives -= 1
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85 }
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86
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87 wrongAnswers[choice.key] = choice.value
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88
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89 if userLives == 0 {
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90 alertTitle = "🤕 Game over 🤕"
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91 alertMessage = "Get up and try again."
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92 showingGameOverAlert = true
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93 } else {
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94 alertTitle = "🔴 Wrong 🔴"
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95 alertMessage = "You have \(userLives) lives left."
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96 showingWrongAnswerAlert = true
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97 }
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98 }
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99
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100 DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [self] in
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101 withAnimation(.easeIn(duration: 0.5)) {
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102 scoreScaleAmount = 1
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103 livesScaleAmount = 1
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104 }
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105 }
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106 }
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107
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108 func reset(selector: () -> Void) {
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109 dataAsked = [String: T]()
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110 userScore = 0
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111 userLives = 3
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112 correctAnswers = [String: T]()
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113 wrongAnswers = [String: T]()
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114 askQuestion {
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115 selector()
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116 }
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117 }
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118
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119 private func playSound(_ filename: String) {
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120 guard let soundFileURL = Bundle.main.url(forResource: filename, withExtension: "wav") else {
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121 fatalError("Sound file \(filename) couldn't be found")
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122 }
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123
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124 do {
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125 try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.ambient)
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126 try AVAudioSession.sharedInstance().setActive(true)
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127 } catch {
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128 fatalError("Couldn't activate session")
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129 }
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130
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131 do {
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132 player = try AVAudioPlayer(contentsOf: soundFileURL)
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133 player?.play()
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134 } catch {
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135 fatalError("Couldn't play sound effect")
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136 }
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137 }
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138 }
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