Add Extension Point maintenance to the iOS app.

iOS/Settings/EnableExtensionPointViewController.swift

@@ -0,0 +1,132 @@
+//
+//  EnableExtensionPointViewController.swift
+//  NetNewsWire-iOS
+//
+//  Created by Maurice Parker on 4/16/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+import AuthenticationServices
+import Account
+import OAuthSwift
+import Secrets
+
+class EnableExtensionPointViewController: UITableViewController {
+
+	@IBOutlet weak var extensionDescription: UILabel!
+	
+	private let callbackURL = URL(string: "vincodennw://")!
+	private var oauth: OAuthSwift?
+
+	weak var delegate: AddExtensionPointDismissDelegate?
+	var extensionPointType: ExtensionPoint.Type?
+	
+	override func viewDidLoad() {
+		super.viewDidLoad()
+		navigationItem.title = extensionPointType?.title
+		extensionDescription.attributedText = extensionPointType?.description
+		tableView.register(ImageHeaderView.self, forHeaderFooterViewReuseIdentifier: "SectionHeader")
+	}
+
+	@IBAction func cancel(_ sender: Any) {
+		dismiss(animated: true, completion: nil)
+		delegate?.dismiss()
+	}
+	
+	@IBAction func enable(_ sender: Any) {
+		guard let extensionPointType = extensionPointType else { return }
+		
+		if let oauth1 = extensionPointType as? OAuth1SwiftProvider.Type {
+			enableOauth1(oauth1)
+		} else {
+			ExtensionPointManager.shared.activateExtensionPoint(extensionPointType)
+			dismiss(animated: true, completion: nil)
+			delegate?.dismiss()
+		}
+	}
+	
+	override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
+		return section == 0 ? ImageHeaderView.rowHeight : super.tableView(tableView, heightForHeaderInSection: section)
+	}
+	
+	override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
+		if section == 0 {
+			let headerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: "SectionHeader") as! ImageHeaderView
+			headerView.imageView.image = extensionPointType?.templateImage
+			return headerView
+		} else {
+			return super.tableView(tableView, viewForHeaderInSection: section)
+		}
+	}
+	
+}
+
+extension EnableExtensionPointViewController: OAuthSwiftURLHandlerType {
+	
+	public func handle(_ url: URL) {
+		let session = ASWebAuthenticationSession(url: url, callbackURLScheme: callbackURL.scheme, completionHandler: { (url, error) in
+			if let callbackedURL = url {
+				OAuth1Swift.handle(url: callbackedURL)
+			}
+			
+			guard let error = error else { return }
+
+			self.oauth?.cancel()
+			self.oauth = nil
+
+			DispatchQueue.main.async {
+				self.dismiss(animated: true, completion: nil)
+				self.delegate?.dismiss()
+			}
+
+			if case ASWebAuthenticationSessionError.canceledLogin = error {
+				print("Login cancelled.")
+			} else {
+				self.presentError(error)
+			}
+		})
+		
+		session.presentationContextProvider = self
+		if !session.start() {
+			print("Session failed to start!!!")
+		}
+		
+	}
+}
+
+extension EnableExtensionPointViewController: ASWebAuthenticationPresentationContextProviding {
+	
+	public func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {
+		return view.window!
+	}
+	
+}
+
+private extension EnableExtensionPointViewController {
+	
+	func enableOauth1(_ provider: OAuth1SwiftProvider.Type) {
+		
+		let oauth1 = provider.oauth1Swift
+		self.oauth = oauth1
+		oauth1.authorizeURLHandler = self
+		
+		oauth1.authorize(withCallbackURL: callbackURL) { [weak self] result in
+			guard let self = self, let extensionPointType = self.extensionPointType else { return }
+
+			switch result {
+			case .success(let tokenSuccess):
+				ExtensionPointManager.shared.activateExtensionPoint(extensionPointType, tokenSuccess: tokenSuccess)
+				self.dismiss(animated: true, completion: nil)
+				self.delegate?.dismiss()
+			case .failure(let oauthSwiftError):
+				self.presentError(oauthSwiftError)
+			}
+			
+			self.oauth?.cancel()
+			self.oauth = nil
+		}
+		
+	}
+	
+}