Added initial POC version of NetNewsWire for iOS to use as a starting point for the actual app.

iOS/Master/MasterPrimaryViewController.swift

@@ -0,0 +1,121 @@
+//
+//  MasterPrimaryViewController.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 4/8/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+import Account
+import RSCore
+import RSTree
+
+class MasterPrimaryViewController: MasterViewController {
+
+	// MARK: Actions
+	
+	@IBAction func showOPMLImportExport(_ sender: UIBarButtonItem) {
+		
+		let optionMenu = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
+		
+		let importOPML = UIAlertAction(title: "Import OPML", style: .default) { [unowned self] alertAction in
+			let docPicker = UIDocumentPickerViewController(documentTypes: ["public.xml", "org.opml.opml"], in: .import)
+			docPicker.delegate = self
+			docPicker.modalPresentationStyle = .formSheet
+			self.present(docPicker, animated: true)
+		}
+		optionMenu.addAction(importOPML)
+		
+		let exportOPML = UIAlertAction(title: "Export OPML", style: .default) { [unowned self] alertAction in
+			
+			let filename = "MySubscriptions.opml"
+			let tempFile = FileManager.default.temporaryDirectory.appendingPathComponent(filename)
+			let opmlString = OPMLExporter.OPMLString(with: AccountManager.shared.localAccount, title: filename)
+			do {
+				try opmlString.write(to: tempFile, atomically: true, encoding: String.Encoding.utf8)
+			} catch {
+				self.presentError(title: "OPML Export Error", message: error.localizedDescription)
+			}
+			
+			let docPicker = UIDocumentPickerViewController(url: tempFile, in: .exportToService)
+			docPicker.modalPresentationStyle = .formSheet
+			self.present(docPicker, animated: true)
+			
+		}
+		optionMenu.addAction(exportOPML)
+		optionMenu.addAction(UIAlertAction(title: "Cancel", style: .cancel))
+		
+		if let popoverController = optionMenu.popoverPresentationController {
+			popoverController.barButtonItem = sender
+		}
+
+		self.present(optionMenu, animated: true)
+		
+	}
+	
+	// MARK: - Table View
+	
+	override func numberOfSections(in tableView: UITableView) -> Int {
+		return treeController.rootNode.numberOfChildNodes
+	}
+	
+	override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+		return treeController.rootNode.childAtIndex(section)?.numberOfChildNodes ?? 0
+	}
+	
+	override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+		guard let nameProvider = treeController.rootNode.childAtIndex(section)?.representedObject as? DisplayNameProvider else {
+			return nil
+		}
+		return nameProvider.nameForDisplay
+	}
+	
+	// MARK: API
+	
+	override func delete(indexPath: IndexPath) {
+		
+		guard let containerNode = treeController.rootNode.childAtIndex(indexPath.section),
+			let deleteNode = containerNode.childAtIndex(indexPath.row),
+			let container = containerNode.representedObject as? Container else {
+				return
+		}
+		
+		animatingChanges = true
+		
+		if let feed = deleteNode.representedObject as? Feed {
+			container.deleteFeed(feed)
+		}
+		
+		if let folder = deleteNode.representedObject as? Folder {
+			container.deleteFolder(folder)
+		}
+		
+		treeController.rebuild()
+		tableView.deleteRows(at: [indexPath], with: .automatic)
+		
+		animatingChanges = false
+		
+	}
+	
+	override func nodeFor(indexPath: IndexPath) -> Node? {
+		return treeController.rootNode.childAtIndex(indexPath.section)?.childAtIndex(indexPath.row)
+	}
+	
+}
+
+extension MasterPrimaryViewController: UIDocumentPickerDelegate {
+	
+	func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
+		
+		for url in urls {
+			do {
+				try OPMLImporter.parseAndImport(fileURL: url, account: AccountManager.shared.localAccount)
+			} catch {
+				presentError(title: "OPML Import Error", message: error.localizedDescription)
+			}
+		}
+		
+	}
+	
+}