[Technical Debt] Update Swift wrappers for Facebook & GoogleSignIn

[navaronbracke]

Currently the Swift wrapper classes for Facebook & GoogleSignIn are out of date, which breaks the example app on iOS.
You can run the example if you comment out the Swift wrappers, but that is not ideal for a fully featured example app.

Proposal

1. Bump the google_sign_in & facebook_auth dependencies (the versions are a bit out of date)
2. Update the Swift wrappers for the integrations

[nemscep]

@navaronbracke Although I am no ios engineer I managed to fix up GoogleWrapper file 😬
Can you try it out to see if it works for you?

google_sign_in: ^6.1.3
flutter_facebook_auth: ^5.0.11

//  GoogleWrapper.swift
//  GigyaSwift
//
//  Created by Shmuel, Sagi on 15/04/2019.
//  Copyright © 2019 Gigya. All rights reserved.
//

import UIKit
import GoogleSignIn
import Gigya

class GoogleWrapper: ProviderWrapperProtocol {
    var clientID: String?

    private lazy var googleLogin: GoogleInternalWrapper = {
        return GoogleInternalWrapper()
    }()

    required init() {
    }

    func login(params: [String: Any]? = nil, viewController: UIViewController? = nil,
               completion: @escaping (_ jsonData: [String: Any]?, _ error: String?) -> Void) {
        googleLogin.login(params: params, viewController: viewController, completion: completion)
    }

    func logout() {
        googleLogin.logout()
    }
}

private class GoogleInternalWrapper: NSObject {
    let defaultScopes = ["https://www.googleapis.com/auth/plus.login", "email"]

    var clientID: String? = {
        return Bundle.main.infoDictionary?["GoogleClientID"] as? String
    }()

    var googleServerClientID: String? {
        return Bundle.main.infoDictionary?["GoogleServerClientID"] as? String
    }

    lazy var googleLogin: GIDSignIn = {
        return GIDSignIn.sharedInstance
    }()

    func login(params: [String: Any]? = nil, viewController: UIViewController? = nil,
               completion: @escaping (_ jsonData: [String: Any]?, _ error: String?) -> Void) {
        guard let viewController = viewController, let clientID = clientID, let googleServerClientID = googleServerClientID else {
            return
        }
        googleLogin.addScopes(defaultScopes, presenting: viewController)
        googleLogin.signIn(with: GIDConfiguration(clientID: clientID, serverClientID: googleServerClientID), presenting: viewController) { user, error in
            if let error = error {
                completion(nil, error.localizedDescription)
                return
            }
            if let user = user {
                let jsonData = ["accessToken": user.serverAuthCode ?? ""]
                completion(jsonData, nil)
            }
        }
    }

    func logout() {
        googleLogin.signOut()
    }
}

[nemscep]

Hey @navaronbracke! 👋
Below you can find GoogleWrapper adjusted for latest GoogleSignIn version (GoogleSignIn 7).

import UIKit
import GoogleSignIn
import Gigya

class GoogleWrapper: ProviderWrapperProtocol {
    let defaultScopes = ["https://www.googleapis.com/auth/plus.login", "email"]

    var clientID: String? = {
        return Bundle.main.infoDictionary?["GIDClientID"] as? String
    }()

    var googleServerClientID: String? {
        return Bundle.main.infoDictionary?["GoogleServerClientID"] as? String
    }

    lazy var googleLogin: GIDSignIn = {
        return GIDSignIn.sharedInstance
    }()  

    required init() {
    }

    func login(params: [String: Any]? = nil, viewController: UIViewController? = nil,
               completion: @escaping (_ jsonData: [String: Any]?, _ error: String?) -> Void) {

        guard let viewController = viewController, let clientID = clientID, let serverClientID = googleServerClientID else {
            print("Missing value in Info.plist");
            return
        }
        
        googleLogin.configuration = GIDConfiguration.init(clientID: clientID, serverClientID: serverClientID);
        googleLogin.currentUser?.addScopes(defaultScopes, presenting: viewController);
        
        googleLogin.signIn(withPresenting: viewController){ result, error in
            if let error = error {
                completion(nil, error.localizedDescription)
                return
            }
            if let user = result?.user {
                let jsonData = ["accessToken": result?.serverAuthCode ?? ""]
                completion(jsonData, nil)
            }
        }
    }

    func logout() {
        googleLogin.signOut()
    }
}

[nemscep]

All up-to-date ios wrappers can be found on ios gigya sdk repo.
https://github.com/SAP/gigya-swift-sdk/releases/tag/1.6.3