Should we include this kind of functionality?

[popaaaandrei]

Hello All,

I one of my projects I used a master class to handle all Firebase+Rx interactions and receive GIDAuthentication info from a separate Google class that handles all Google Sign In stuff.

Is this somehting that we want to have? I can make a more-documented proposal.

class Firebase {

    static let instance = Firebase()

    internal let rx_user = ReplaySubject<FIRUser>.create(bufferSize: 1)
    internal let disposeBag = DisposeBag()

    private let database = FIRDatabase.database().reference()
    private let storage = FIRStorage.storage().reference()

    // this prevents others from using the
    // default '()' initializer for this class.
    private init() {
        // pass firebase clientID to Google
        if let clientID = clientID {
            Google.instance.clientID = clientID
        }

        // new user chain
        Google.instance
            .rx_firebaseCredential
            .flatMapLatest { credential in
                Firebase.instance.rx_signInWithCredential(credential)
            }
            .subscribeNext({ user in
                Firebase.instance.rx_user.onNext(user)
            })
            .addDisposableTo(Google.instance.disposeBag)
    }

class Google : NSObject, GIDSignInDelegate, GIDSignInUIDelegate {

    static let instance = Google()
    internal let disposeBag = DisposeBag()

    var rx_firebaseCredential : Observable<FIRAuthCredential> {
        return rx_user
            .doOnNext({ _ in print("--------------- rx_firebaseCredential received") })
            .map({ $0.authentication })
            .map({ authentication in
                FIRGoogleAuthProvider.credentialWithIDToken(authentication.idToken,
                    accessToken: authentication.accessToken)
            })
    }

    private let rx_user = ReplaySubject<GIDGoogleUser>.create(bufferSize: 1)

}