Add Feedbin account and delete account functionality added to iOS

iOS/Settings/FeedbinAccountViewController.swift

@@ -0,0 +1,103 @@
+//
+//  AddFeedbinAccountViewController.swift
+//  NetNewsWire-iOS
+//
+//  Created by Maurice Parker on 5/19/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+import Account
+import RSWeb
+
+class FeedbinAccountViewController: UIViewController {
+
+	@IBOutlet weak var cancelBarButtonItem: UIBarButtonItem!
+	@IBOutlet weak var activityIndicator: UIActivityIndicatorView!
+	@IBOutlet weak var doneBarButtonItem: UIBarButtonItem!
+	@IBOutlet weak var emailTextField: UITextField!
+	@IBOutlet weak var passwordTextField: UITextField!
+	@IBOutlet weak var errorMessageLabel: UILabel!
+	
+	weak var account: Account?
+	weak var delegate: AddAccountDismissDelegate?
+
+	override func viewDidLoad() {
+        super.viewDidLoad()
+
+		activityIndicator.isHidden = true
+		
+		if let account = account, let credentials = try? account.retrieveBasicCredentials() {
+			if case .basic(let username, let password) = credentials {
+				emailTextField.text = username
+				passwordTextField.text = password
+			}
+		}
+	}
+	
+	@IBAction func cancel(_ sender: Any) {
+		dismiss(animated: true)
+	}
+	
+	@IBAction func done(_ sender: Any) {
+
+		self.errorMessageLabel.text = nil
+		
+		guard emailTextField.text != nil && passwordTextField.text != nil else {
+			self.errorMessageLabel.text = NSLocalizedString("Username & password required.", comment: "Credentials Error")
+			return
+		}
+		
+		cancelBarButtonItem.isEnabled = false
+		doneBarButtonItem.isEnabled = false
+		activityIndicator.isHidden = false
+		activityIndicator.startAnimating()
+		
+		let credentials = Credentials.basic(username: emailTextField.text ?? "", password: passwordTextField.text ?? "")
+		Account.validateCredentials(type: .feedbin, credentials: credentials) { [weak self] result in
+			
+			guard let self = self else { return }
+			
+			self.cancelBarButtonItem.isEnabled = true
+			self.doneBarButtonItem.isEnabled = true
+			self.activityIndicator.isHidden = true
+			self.activityIndicator.stopAnimating()
+			
+			switch result {
+			case .success(let authenticated):
+				
+				if authenticated {
+					
+					var newAccount = false
+					if self.account == nil {
+						self.account = AccountManager.shared.createAccount(type: .feedbin)
+						newAccount = true
+					}
+					
+					do {
+						try self.account?.removeBasicCredentials()
+						try self.account?.storeCredentials(credentials)
+						if newAccount {
+							self.account?.refreshAll()
+						}
+						self.dismiss(animated: true)
+						self.delegate?.dismiss()
+					} catch {
+						self.errorMessageLabel.text = NSLocalizedString("Keychain error while storing credentials.", comment: "Credentials Error")
+					}
+					
+				} else {
+					self.errorMessageLabel.text = NSLocalizedString("Invalid email/password combination.", comment: "Credentials Error")
+				}
+				
+			case .failure:
+				
+				self.errorMessageLabel.text = NSLocalizedString("Network error.  Try again later.", comment: "Credentials Error")
+				
+			}
+			
+		}
+		
+	}
+
+}