gistfile1.txt

//
//  ViewController.swift
//  YogiDoListFB
//
//  Created by Daniel Williams on 6/16/16.
//  Copyright © 2016 Dandom, LLC. All rights reserved.
//

import UIKit
import FirebaseAuth

enum SignInError: ErrorType {
    case UserNotFound
    case InvalidPassword
    case OtherError(code: Int)
}

class SignInViewController: UIViewController {
    
    
    @IBOutlet weak var usernameTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var statusLabel: UILabel!
    @IBOutlet weak var loginButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
    
    }
    
    @IBAction func loginButtonPressed(sender: UIButton) {
        guard let username = usernameTextField.text where !username.isEmpty else { return }
        guard let password = passwordTextField.text where !password.isEmpty else { return }

        signUserIn(username, password: password)
        
    }
    
    func signUserIn(username: String, password: String) {
        FIRAuth.auth()?.signInWithEmail(username, password: password, completion: { (user, error) in
            guard error == nil else {
                self.handleError(error!) // how to handle this error case without passing an individual SignInError.XXXX
                return
            }
            
            user?.getTokenWithCompletion({ (token, error) in
                guard error == nil else { self.handleError(SignInError.OtherError(code: error!.code)); return }
                print(token)
            })
        })
    }
    
    func handleError(error: ErrorType) {
        switch error {
        case SignInError.InvalidPassword:
            print("invalid password.")
        case SignInError.UserNotFound:
            print("user not found!")
        case SignInError.OtherError(let code):
            print("some other error: \(code)")
        default:
            print("how'd we get here?")
        }
    }


}