class LoginPresenter {

    var loginService : LoginService?

    convenience init(loginService : LoginService) {
        self.init()
        self.loginService = loginService
    }

    public func loginUserSaveSessionAndGetUserList(username : String, password : String, completion: @escaping (Error?) -> Void) {
        self.loginService?.login(username: username , password: password, completion: { (user,error) in
            if error == nil {
                Session.shared.saveUser(user!)
                self.getUserList(completion: { (userFeed, error) in
                    if error == nil {
                        Session.shared.saveUserList(userFeed!)
                    }
                })
            }
            completion(error)
        })
    }


    private func getUserList(completion: @escaping (UserFeed?, Error?) -> Void) {
        self.loginService?.getUserList(token: "", completion: { (userFeed, error) in
            completion(userFeed,error)
        })
    }


}