1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// Copyright 2017 Google
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import UIKit
import FirebaseAuth
protocol EmailLoginDelegate {
func emailLogin(_ controller: EmailLoginViewController, signedInAs user: User)
func emailLogin(_ controller: EmailLoginViewController, failedWithError error: Error)
}
class EmailLoginViewController: UIViewController {
// MARK: - Public Properties
var delegate: EmailLoginDelegate?
// MARK: - User Interface
@IBOutlet private weak var emailAddress: UITextField!
@IBOutlet private weak var password: UITextField!
// MARK: - User Actions
@IBAction func logInButtonHit(_ sender: UIButton) {
guard let (email, password) = validatedInputs() else { return }
Auth.auth().signIn(withEmail: email, password: password) { [unowned self] (user, error) in
guard let user = user else {
print("Error signing in: \(error!)")
self.delegate?.emailLogin(self, failedWithError: error!)
return
}
print("Signed in as user: \(user.uid)!")
self.delegate?.emailLogin(self, signedInAs: user)
}
}
@IBAction func signUpButtonHit(_ sender: UIButton) {
guard let (email, password) = validatedInputs() else { return }
Auth.auth().createUser(withEmail: email, password: password) { [unowned self] (user, error) in
guard let user = user else {
print("Error signing up: \(error!)")
self.delegate?.emailLogin(self, failedWithError: error!)
return
}
print("Created new user: \(user.uid)!")
self.delegate?.emailLogin(self, signedInAs: user)
}
}
// MARK: - View Controller Lifecycle
override func viewDidLoad() {
}
// MARK: - Helper Methods
/// Validate the inputs for user email and password, returning the username and password if valid,
/// otherwise nil.
private func validatedInputs() -> (email: String, password: String)? {
guard let userEmail = emailAddress.text, userEmail.count >= 6 else {
presentError(with: "Email address isn't long enough.")
return nil
}
guard let userPassword = password.text, userPassword.count >= 6 else {
presentError(with: "Password is not long enough!")
return nil
}
return (userEmail, userPassword)
}
func presentError(with text: String) {
let alert = UIAlertController(title: "Error", message: text, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Okay", style: .default))
present(alert, animated: true)
}
}
|
