// If the app doesn't store the count, this returns 0.
var count = UserDefaults.standard.integer(forKey: UserDefaultsKeys.processCompletedCountKey)
count += 1
UserDefaults.standard.set(count, forKey: UserDefaultsKeys.processCompletedCountKey)
print("Process completed \(count) time(s).")

// Keep track of the most recent app version that prompts the user for a review.
let lastVersionPromptedForReview = UserDefaults.standard.string(forKey: UserDefaultsKeys.lastVersionPromptedForReviewKey)

// Get the current bundle version for the app.
let infoDictionaryKey = kCFBundleVersionKey as String
guard let currentVersion = Bundle.main.object(forInfoDictionaryKey: infoDictionaryKey) as? String
    else { fatalError("Expected to find a bundle version in the info dictionary.") }
 // Verify the user completes the process several times and doesn’t receive a prompt for this app version.
 if count >= 4 && currentVersion != lastVersionPromptedForReview {
     Task { @MainActor [weak self] in
         // Delay for two seconds to avoid interrupting the person using the app.
         // Use the equation n * 10^9 to convert seconds to nanoseconds.
         try? await Task.sleep(nanoseconds: UInt64(2e9))
         if let windowScene = self?.view.window?.windowScene,
            self?.navigationController?.topViewController is ProcessCompletedViewController {
             SKStoreReviewController.requestReview(in: windowScene)
             UserDefaults.standard.set(currentVersion, forKey: UserDefaultsKeys.lastVersionPromptedForReviewKey)
        }
     }
 }