SignInWithApple-SwiftUI-Coordinator.swift

class Coordinator: NSObject, ASAuthorizationControllerDelegate, ASAuthorizationControllerPresentationContextProviding {
    let parent: SignInWithAppleView?
    
    init(_ parent: SignInWithAppleView) {
        self.parent = parent
        super.init()

    }
    
    @objc func didTapButton() {
        let appleIDProvider = ASAuthorizationAppleIDProvider()
        let request = appleIDProvider.createRequest()
        request.requestedScopes = [.fullName, .email]
        
        let authorizationController = ASAuthorizationController(authorizationRequests: [request])
        authorizationController.presentationContextProvider = self
        authorizationController.delegate = self
        authorizationController.performRequests()
    }
    
    func presentationAnchor(for controller: ASAuthorizationController) -> ASPresentationAnchor {
        let vc = UIApplication.shared.windows.last?.rootViewController
        return (vc?.view.window!)!
    }
    
    func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
        guard let credentials = authorization.credential as? ASAuthorizationAppleIDCredential else {
            print("credentials not found....")
            return
        }
        
        let defaults = UserDefaults.standard
        defaults.set(credentials.user, forKey: "userId")
        parent?.name = "\(credentials.fullName?.givenName ?? "")"
    }
    
    func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) {
    }
}