Add already subscribed error to LocalAccountDelegate and updated iOS to work with latest Account API

Frameworks/Account/LocalAccount/LocalAccountDelegate.swift

@@ -152,6 +152,11 @@ extension LocalAccountDelegate: FeedFinderDelegate {
 			return
 		}
 
+		if account.hasFeed(withURL: bestFeedSpecifier.urlString) {
+			createFeedCompletion!(.failure(AccountError.createErrorAlreadySubscribed))
+			return
+		}
+		
 		let feed = account.createFeed(with: nil, url: url.absoluteString, feedID: url.absoluteString, homePageURL: nil)
 		InitialFeedDownloader.download(url) { [weak self] parsedFeed in
 			if let parsedFeed = parsedFeed {

iOS/Add/AddFeedViewController.swift

@@ -93,24 +93,21 @@ class AddFeedViewController: UITableViewController, AddContainerViewControllerCh
 		account!.createFeed(url: url.absoluteString) { [weak self] result in
 			
 			switch result {
-			case .success(let createFeedResult):
+			case .success(let feed):
-				switch createFeedResult {
-				case .created(let feed):
 				self?.processFeed(feed, account: account!, folder: folder, url: url, title: title)
-				case .multipleChoice(let feedChoices):
+			case .failure(let error):
-					print()
+				switch error {
-					self?.delegate?.processingDidCancel()
+				case AccountError.createErrorAlreadySubscribed:
-				case .alreadySubscribed:
 					self?.showAlreadySubscribedError()
 					self?.delegate?.processingDidCancel()
-				case .notFound:
+				case AccountError.createErrorNotFound:
 					self?.showNoFeedsErrorMessage()
 					self?.delegate?.processingDidCancel()
-				}
+				default:
-			case .failure(let error):
 					self?.presentError(error)
 					self?.delegate?.processingDidCancel()
 				}
+			}
 
 		}