Add UIActivityIndicator

SwiftIOSExperiments/AuthService.swift

@@ -9,6 +9,16 @@
 import Foundation
 import Auth0
 
+public struct Auth {
+	public var email: String
+	public var password: String
+
+	public init(email: String, password: String) {
+		self.email = email
+		self.password = password
+	}
+}
+
 class AuthService {
 	static func authenticate(_ email: String, _ password: String,
 	                         completion: @escaping (_ result: Result<Credentials>) -> Void) {

SwiftIOSExperiments/Extensions.swift

@@ -7,9 +7,17 @@
 //
 
 import Foundation
+import UIKit
 
 protocol LoginValidation {}
 
+protocol LoadingAuthentication {
+	var spinner: UIActivityIndicatorView { get }
+
+	func success(_ token: String)
+	func failed(_ error: Any)
+}
+
 extension LoginValidation {
     func isValidEmail(_ email: String) -> Bool {
 		// swiftlint:disable:next line_length
@@ -28,3 +36,23 @@ extension LoginValidation {
         return true
     }
 }
+
+extension LoadingAuthentication where Self: UIViewController {
+	func authenticate(auth: Auth) {
+		spinner.startAnimating()
+
+		AuthService.authenticate(auth.email, auth.password,
+		                         completion: { [weak self] result in
+			switch result {
+			case .success(let credentials):
+				guard let idToken = credentials.idToken else { return }
+
+				self?.success(idToken)
+			case .failure(let error):
+				self?.failed(error)
+			}
+
+			self?.spinner.stopAnimating()
+		})
+	}
+}

SwiftIOSExperiments/ViewController.swift

@@ -8,7 +8,8 @@
 
 import UIKit
 
-class ViewController: UIViewController, LoginValidation {
+class ViewController: UIViewController, LoginValidation, LoadingAuthentication {
+	let spinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
 
 	@IBOutlet var email: UITextField!
 	@IBOutlet var password: UITextField!
@@ -18,6 +19,11 @@ class ViewController: UIViewController, LoginValidation {
 
     override func viewDidLoad() {
         super.viewDidLoad()
+
+		spinner.hidesWhenStopped = true
+		spinner.center = view.center
+
+		view.addSubview(spinner)
     }
 
 	@IBAction func login(_ button: UIButton) {
@@ -37,17 +43,18 @@ class ViewController: UIViewController, LoginValidation {
 				emailValidationMessage = nil
 				passwordValidationMessage = nil
 			} else {
-				AuthService.authenticate(email, password, completion: { result in
-					switch result {
-					case .success(let credentials):
-						guard let idToken = credentials.idToken else { return }
-
-						print("Successfully logged-in: \(idToken)")
-					case .failure(let error):
-						print("Error: \(error)")
-					}
-				})
+				let resource = Auth(email: email, password: password)
+
+				authenticate(auth: resource)
 			}
 		}
 	}
+
+	func success(_ token: String) {
+		print("Token: \(token)")
+	}
+
+	func failed(_ error: Any) {
+		print("Error: \(error)")
+	}
 }

docs/learning-points.md

@@ -5,13 +5,14 @@
   - [ ] [Stack Views](https://www.raywenderlich.com/114552/uistackview-tutorial-introducing-stack-views)
 
 ## SDK Components
-  - [ ] UIActivityIndicatorView
+  - [x] UIActivityIndicatorView
   - [ ] UITableView
   - [ ] Collection Views
 
 ## Navigation
   - [ ] UINavigationController
   - [ ] [Multiple Storyboard](https://code.tutsplus.com/tutorials/ios-9-staying-organized-with-storyboard-references--cms-24226)
+  - [x] [Connecting View Controllers](https://talk.objc.io/episodes/S01E05-connecting-view-controllers)
 
 ## Architecture/Patterns
   - [x] [Viper Architecture](https://www.ckl.io/blog/ios-project-architecture-using-viper/)