Singleton+Template

Singleton+AuthManager.swift

import RxSwift
import RxSwiftExt

enum AuthenticationStatus {
    case none
    case error(AuthServiceError)
    case user(String)
}

final class AuthManager {
    
    let status = Variable(AuthenticationStatus.none)
    
    static let shared = AuthManager()
    private let authService = AuthService()
    private init() { }
    
    func signUpUserWith(email: String, password: String) -> Observable<UserAuthResult> {
        return authService.signUpUserWith(email: email, password: password)
    }
    
    func signInUserWith(email: String, password: String) -> Observable<UserAuthResult> {
        return authService.signInUserWith(email: email, password: password)
    }
    
    func signOutUser() -> Observable<UserAuthResult> {
        return authService.signOut()
    }
    
    func currentUserId() -> Observable<String> {
        return self.status.asObservable()
            .filterMap { authStatus -> FilterMap<String> in
                switch authStatus {
                case .user(let userId):
                    return .map(userId)
                default:
                    return .ignore
                }
        }
    }
}