Merge pull request #1120 from kielgillard/master

Implements creating, updating, moving and removing feeds.

Frameworks/Account/Account.xcodeproj/project.pbxproj

@@ -115,6 +115,7 @@
 		9EC688EA232B973C00A8D0A2 /* FeedlyAPICaller.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9EC688E9232B973C00A8D0A2 /* FeedlyAPICaller.swift */; };
 		9EC688EC232C583300A8D0A2 /* FeedlyAccountDelegate+OAuth.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9EC688EB232C583300A8D0A2 /* FeedlyAccountDelegate+OAuth.swift */; };
 		9EC688EE232C58E800A8D0A2 /* OAuthAuthorizationCodeGranting.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9EC688ED232C58E800A8D0A2 /* OAuthAuthorizationCodeGranting.swift */; };
+		9ECC9A85234DC16E009B5144 /* FeedlyAccountDelegateError.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9ECC9A84234DC16E009B5144 /* FeedlyAccountDelegateError.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -287,6 +288,7 @@
 		9EC688E9232B973C00A8D0A2 /* FeedlyAPICaller.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FeedlyAPICaller.swift; sourceTree = "<group>"; };
 		9EC688EB232C583300A8D0A2 /* FeedlyAccountDelegate+OAuth.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "FeedlyAccountDelegate+OAuth.swift"; sourceTree = "<group>"; };
 		9EC688ED232C58E800A8D0A2 /* OAuthAuthorizationCodeGranting.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OAuthAuthorizationCodeGranting.swift; sourceTree = "<group>"; };
+		9ECC9A84234DC16E009B5144 /* FeedlyAccountDelegateError.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FeedlyAccountDelegateError.swift; sourceTree = "<group>"; };
 		D511EEB5202422BB00712EC3 /* Account_project_debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Account_project_debug.xcconfig; sourceTree = "<group>"; };
 		D511EEB6202422BB00712EC3 /* Account_target.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Account_target.xcconfig; sourceTree = "<group>"; };
 		D511EEB7202422BB00712EC3 /* Account_project_release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Account_project_release.xcconfig; sourceTree = "<group>"; };
@@ -540,6 +542,7 @@
 			isa = PBXGroup;
 			children = (
 				9EA3133A231E368100268BA0 /* FeedlyAccountDelegate.swift */,
+				9ECC9A84234DC16E009B5144 /* FeedlyAccountDelegateError.swift */,
 				9EC688EB232C583300A8D0A2 /* FeedlyAccountDelegate+OAuth.swift */,
 				9EC688ED232C58E800A8D0A2 /* OAuthAuthorizationCodeGranting.swift */,
 				9EC688E9232B973C00A8D0A2 /* FeedlyAPICaller.swift */,
@@ -783,6 +786,7 @@
 				8469F81C1F6DD15E0084783E /* Account.swift in Sources */,
 				9EAEC60E2332FEC20085D7C9 /* FeedlyFeed.swift in Sources */,
 				5144EA4E227B829A00D19003 /* FeedbinAccountDelegate.swift in Sources */,
+				9ECC9A85234DC16E009B5144 /* FeedlyAccountDelegateError.swift in Sources */,
 				9EA3133B231E368100268BA0 /* FeedlyAccountDelegate.swift in Sources */,
 				51E5959B228C781500FCC42B /* FeedbinStarredEntry.swift in Sources */,
 				9E1D155923343B2A00F4944C /* FeedlyGetStreamParsedItemsOperation.swift in Sources */,

Frameworks/Account/Feedly/FeedlyAPICaller.swift

@@ -90,6 +90,11 @@ final class FeedlyAPICaller {
 	}
 	
 	func getStream(for collection: FeedlyCollection, newerThan: Date? = nil, unreadOnly: Bool? = nil, completionHandler: @escaping (Result<FeedlyStream, Error>) -> ()) {
+		let id = FeedlyCategoryResourceId(id: collection.id)
+		getStream(for: id, newerThan: newerThan, unreadOnly: unreadOnly, completionHandler: completionHandler)
+	}
+	
+	func getStream(for resource: FeedlyResourceId, newerThan: Date?, unreadOnly: Bool?, completionHandler: @escaping (Result<FeedlyStream, Error>) -> ()) {
 		guard let accessToken = credentials?.secret else {
 			return DispatchQueue.main.async {
 				completionHandler(.failure(CredentialsError.incompleteCredentials))
@@ -115,7 +120,7 @@ final class FeedlyAPICaller {
 		
 		queryItems.append(contentsOf: [
 			URLQueryItem(name: "count", value: "1000"),
-			URLQueryItem(name: "streamId", value: collection.id),
+			URLQueryItem(name: "streamId", value: resource.id),
 		])
 		
 		components.queryItems = queryItems
@@ -129,12 +134,6 @@ final class FeedlyAPICaller {
 		request.addValue("application/json", forHTTPHeaderField: "Accept-Type")
 		request.addValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
 		
-		//			URLSession.shared.dataTask(with: request) { (data, response, error) in
-		//				let obj = try! JSONSerialization.jsonObject(with: data!, options: .allowFragments)
-		//				let data = try! JSONSerialization.data(withJSONObject: obj, options: .prettyPrinted)
-		//				print(String(data: data, encoding: .utf8)!)
-		//			}.resume()
-		
 		transport.send(request: request, resultType: FeedlyStream.self, dateDecoding: .millisecondsSince1970, keyDecoding: .convertFromSnakeCase) { result in
 			switch result {
 			case .success(let (_, collections)):
@@ -387,6 +386,98 @@ final class FeedlyAPICaller {
 			}
 		}
 	}
+	
+	func addFeed(with feedId: FeedlyFeedResourceId, title: String? = nil, toCollectionWith collectionId: String, completionHandler: @escaping (Result<[FeedlyFeed], Error>) -> ()) {
+		guard let accessToken = credentials?.secret else {
+			return DispatchQueue.main.async {
+				completionHandler(.failure(CredentialsError.incompleteCredentials))
+			}
+		}
+
+		guard let encodedId = encodeForURLPath(collectionId) else {
+			return DispatchQueue.main.async {
+				completionHandler(.failure(FeedbinAccountDelegateError.invalidParameter))
+			}
+		}
+		var components = baseUrlComponents
+		components.percentEncodedPath = "/v3/collections/\(encodedId)/feeds"
+		
+		guard let url = components.url else {
+			fatalError("\(components) does not produce a valid URL.")
+		}
+		
+		var request = URLRequest(url: url)
+		request.httpMethod = "PUT"
+		request.addValue("application/json", forHTTPHeaderField: HTTPRequestHeader.contentType)
+		request.addValue("application/json", forHTTPHeaderField: "Accept-Type")
+		request.addValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
+		
+		do {
+			struct AddFeedBody: Encodable {
+				var id: String
+				var title: String?
+			}
+			let encoder = JSONEncoder()
+			let data = try encoder.encode(AddFeedBody(id: feedId.id, title: title))
+			request.httpBody = data
+		} catch {
+			return DispatchQueue.main.async {
+				completionHandler(.failure(error))
+			}
+		}
+		
+		transport.send(request: request, resultType: [FeedlyFeed].self, dateDecoding: .millisecondsSince1970, keyDecoding: .convertFromSnakeCase) { result in
+			switch result {
+			case .success(_, let collectionFeeds):
+				if let feeds = collectionFeeds {
+					completionHandler(.success(feeds))
+				} else {
+					completionHandler(.failure(URLError(.cannotDecodeContentData)))
+				}
+			case .failure(let error):
+				completionHandler(.failure(error))
+			}
+		}
+	}
+	
+	func removeFeed(_ feedId: String, fromCollectionWith collectionId: String, completionHandler: @escaping (Result<Void, Error>) -> ()) {
+		guard let accessToken = credentials?.secret else {
+			return DispatchQueue.main.async {
+				completionHandler(.failure(CredentialsError.incompleteCredentials))
+			}
+		}
+
+		guard let encodedCollectionId = encodeForURLPath(collectionId), let encodedFeedId = encodeForURLPath(feedId) else {
+			return DispatchQueue.main.async {
+				completionHandler(.failure(FeedbinAccountDelegateError.invalidParameter))
+			}
+		}
+		var components = baseUrlComponents
+		components.percentEncodedPath = "/v3/collections/\(encodedCollectionId)/feeds/\(encodedFeedId)"
+		
+		guard let url = components.url else {
+			fatalError("\(components) does not produce a valid URL.")
+		}
+		
+		var request = URLRequest(url: url)
+		request.httpMethod = "DELETE"
+		request.addValue("application/json", forHTTPHeaderField: HTTPRequestHeader.contentType)
+		request.addValue("application/json", forHTTPHeaderField: "Accept-Type")
+		request.addValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
+		
+		transport.send(request: request, resultType: [FeedlyFeed].self, dateDecoding: .millisecondsSince1970, keyDecoding: .convertFromSnakeCase) { result in
+			switch result {
+			case .success(let httpResponse, _):
+				if httpResponse.statusCode == 200 {
+					completionHandler(.success(()))
+				} else {
+					completionHandler(.failure(URLError(.cannotDecodeContentData)))
+				}
+			case .failure(let error):
+				completionHandler(.failure(error))
+			}
+		}
+	}
 }
 
 extension FeedlyAPICaller: OAuthAuthorizationCodeGrantRequesting {

Frameworks/Account/Feedly/FeedlyAccountDelegate.swift

@@ -148,14 +148,21 @@ final class FeedlyAccountDelegate: AccountDelegate {
 	}
 	
 	func addFolder(for account: Account, name: String, completion: @escaping (Result<Folder, Error>) -> Void) {
+		
+		let progress = refreshProgress
+		progress.addToNumberOfTasksAndRemaining(1)
+		
 		caller.createCollection(named: name) { result in
+			progress.completeTask()
+			
 			switch result {
 			case .success(let collection):
 				if let folder = account.ensureFolder(with: collection.label) {
 					folder.externalID = collection.id
 					completion(.success(folder))
 				} else {
-					completion(.failure(FeedbinAccountDelegateError.invalidParameter))
+					// Is the name empty? Or one of the global resource names?
+					completion(.failure(FeedlyAccountDelegateError.unableToAddFolder(name)))
 				}
 			case .failure(let error):
 				completion(.failure(error))
@@ -165,26 +172,40 @@ final class FeedlyAccountDelegate: AccountDelegate {
 	
 	func renameFolder(for account: Account, with folder: Folder, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
 		guard let id = folder.externalID else {
-			completion(.failure(FeedbinAccountDelegateError.invalidParameter))
+			return DispatchQueue.main.async {
-			return
+				completion(.failure(FeedlyAccountDelegateError.unableToRenameFolder(folder.nameForDisplay, name)))
+			}
 		}
+		
+		let nameBefore = folder.name
+		
 		caller.renameCollection(with: id, to: name) { result in
 			switch result {
 			case .success(let collection):
 				folder.name = collection.label
 				completion(.success(()))
 			case .failure(let error):
+				folder.name = nameBefore
 				completion(.failure(error))
 			}
 		}
+		
+		folder.name = name
 	}
 	
 	func removeFolder(for account: Account, with folder: Folder, completion: @escaping (Result<Void, Error>) -> Void) {
 		guard let id = folder.externalID else {
-			completion(.failure(FeedbinAccountDelegateError.invalidParameter))
+			return DispatchQueue.main.async {
-			return
+				completion(.failure(FeedlyAccountDelegateError.unableToRemoveFolder(folder.nameForDisplay)))
+			}
 		}
+		
+		let progress = refreshProgress
+		progress.addToNumberOfTasksAndRemaining(1)
+		
 		caller.deleteCollection(with: id) { result in
+			progress.completeTask()
+			
 			switch result {
 			case .success:
 				account.removeFolder(folder)
@@ -195,32 +216,267 @@ final class FeedlyAccountDelegate: AccountDelegate {
 		}
 	}
 	
+	private func isValidContainer(for account: Account, container: Container) throws -> (Folder, String) {
+		guard let folder = container as? Folder else {
+			throw FeedlyAccountDelegateError.addFeedChooseFolder
+		}
+		
+		guard let collectionId = folder.externalID else {
+			throw FeedlyAccountDelegateError.addFeedInvalidFolder(folder)
+		}
+		
+		guard let userId = credentials?.username else {
+			throw FeedlyAccountDelegateError.notLoggedIn
+		}
+		
+		let uncategorized = FeedlyCategoryResourceId.uncategorized(for: userId)
+		
+		guard collectionId != uncategorized.id else {
+			throw FeedlyAccountDelegateError.addFeedInvalidFolder(folder)
+		}
+		
+		return (folder, collectionId)
+	}
+	
 	func createFeed(for account: Account, url: String, name: String?, container: Container, completion: @escaping (Result<Feed, Error>) -> Void) {
-		fatalError()
+		let (folder, collectionId): (Folder, String)
+		do {
+			(folder, collectionId) = try isValidContainer(for: account, container: container)
+		} catch {
+			return DispatchQueue.main.async {
+				completion(.failure(error))
+			}
+		}
+		
+		let resourceId = FeedlyFeedResourceId(url: url)
+		
+		let progress = refreshProgress
+		progress.addToNumberOfTasksAndRemaining(1)
+		
+		caller.addFeed(with: resourceId, title: name, toCollectionWith: collectionId) { [weak self] result in
+			defer { progress.completeTask() }
+			
+			switch result {
+			case .success(let feedlyFeeds):
+				let feedsBefore = folder.flattenedFeeds()
+				for feedlyFeed in feedlyFeeds where !account.hasFeed(with: feedlyFeed.feedId) {
+					let resourceId = FeedlyFeedResourceId(id: feedlyFeed.id)
+					let feed = account.createFeed(with: feedlyFeed.title,
+												  url: resourceId.url,
+												  feedID: feedlyFeed.id,
+												  homePageURL: feedlyFeed.website)
+					folder.addFeed(feed)
+				}
+				
+				let feedsAfter = folder.flattenedFeeds()
+				let added = feedsAfter.subtracting(feedsBefore)
+				
+				guard let first = added.first else {
+					return completion(.failure(AccountError.createErrorNotFound))
+				}
+				
+				let group = DispatchGroup()
+				progress.addToNumberOfTasksAndRemaining(1)
+				
+				if let self = self {
+					for feed in added {
+						group.enter()
+						let resourceId = FeedlyFeedResourceId(id: feed.feedID)
+						self.caller.getStream(for: resourceId, newerThan: nil, unreadOnly: nil) { result in
+							switch result {
+							case .success(let stream):
+								let items = Set(stream.items.map { FeedlyEntryParser(entry: $0).parsedItemRepresentation })
+								
+								account.update(feed, parsedItems: items, defaultRead: false) {
+									group.leave()
+								}
+								
+							case .failure:
+								// Feed will remain empty until new articles appear.
+								group.leave()
+							}
+						}
+					}
+				}
+				
+				group.notify(queue: .main) {
+					progress.completeTask()
+					completion(.success(first))
+				}
+				
+			case .failure(let error):
+				completion(.failure(error))
+			}
+		}
 	}
 	
 	func renameFeed(for account: Account, with feed: Feed, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		let folderCollectionIds = account.folders?.filter { $0.has(feed) }.compactMap { $0.externalID }
+		guard let collectionIds = folderCollectionIds, let collectionId = collectionIds.first else {
+			completion(.failure(FeedbinAccountDelegateError.invalidParameter))
+			return
+		}
+		
+		let feedId = FeedlyFeedResourceId(id: feed.feedID)
+		let editedNameBefore = feed.editedName
+		
+		// Adding an existing feed updates it.
+		// Updating feed name in one folder/collection updates it for all folders/collections.
+		caller.addFeed(with: feedId, title: name, toCollectionWith: collectionId) { result in
+			switch result {
+			case .success:
+				completion(.success(()))
+				
+			case .failure(let error):
+				feed.editedName = editedNameBefore
+				completion(.failure(error))
+			}
+		}
+		
+		// optimistically set the name
+		feed.editedName = name
 	}
 	
 	func addFeed(for account: Account, with: Feed, to container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		let (folder, collectionId): (Folder, String)
+		do {
+			(folder, collectionId) = try isValidContainer(for: account, container: container)
+		} catch {
+			return DispatchQueue.main.async {
+				completion(.failure(error))
+			}
+		}
+		
+		let feedId = FeedlyFeedResourceId(id: with.feedID)
+		
+		caller.addFeed(with: feedId, toCollectionWith: collectionId) { result in
+			switch result {
+			case .success(let feedlyFeeds):
+				for feedlyFeed in feedlyFeeds where !folder.hasFeed(with: feedlyFeed.feedId) {
+					let feed: Feed = {
+						if with.url == FeedlyFeedResourceId(id: feedlyFeed.id).url {
+							with.metadata.feedID = feedlyFeed.id
+							with.name = feedlyFeed.title
+							with.homePageURL = feedlyFeed.website
+							return with
+						} else {
+							let resourceId = FeedlyFeedResourceId(id: feedlyFeed.id)
+							return account.createFeed(with: feedlyFeed.title,
+													  url: resourceId.url,
+													  feedID: feedlyFeed.id,
+													  homePageURL: feedlyFeed.website)
+						}
+					}()
+					folder.addFeed(feed)
+				}
+				
+				completion(.success(()))
+				
+			case .failure(let error):
+				completion(.failure(error))
+			}
+		}
 	}
 	
 	func removeFeed(for account: Account, with feed: Feed, from container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		guard let folder = container as? Folder, let collectionId = folder.externalID else {
+			return DispatchQueue.main.async {
+				completion(.failure(FeedlyAccountDelegateError.unableToRemoveFeed(feed)))
+			}
+		}
+		
+		caller.removeFeed(feed.feedID, fromCollectionWith: collectionId) { result in
+			switch result {
+			case .success:
+				completion(.success(()))
+			case .failure(let error):
+				folder.addFeed(feed)
+				completion(.failure(error))
+			}
+		}
+		
+		folder.removeFeed(feed)
 	}
 	
 	func moveFeed(for account: Account, with feed: Feed, from: Container, to: Container, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		guard let from = from as? Folder, let to = to as? Folder else {
+			return DispatchQueue.main.async {
+				completion(.failure(FeedlyAccountDelegateError.addFeedChooseFolder))
+			}
+		}
+		
+		addFeed(for: account, with: feed, to: to) { [weak self] addResult in
+			switch addResult {
+				// now that we have added the feed, remove it from the other collection
+			case .success:
+				self?.removeFeed(for: account, with: feed, from: from) { removeResult in
+					switch removeResult {
+					case .success:
+						completion(.success(()))
+					case .failure:
+						from.addFeed(feed)
+						completion(.failure(FeedlyAccountDelegateError.unableToMoveFeedBetweenFolders(feed, from, to)))
+					}
+				}
+			case .failure(let error):
+				from.addFeed(feed)
+				to.removeFeed(feed)
+				completion(.failure(error))
+			}
+			
+		}
+		
+		// optimistically move the feed, undoing as appropriate to the failure
+		from.removeFeed(feed)
+		to.addFeed(feed)
 	}
 	
 	func restoreFeed(for account: Account, feed: Feed, container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		if let existingFeed = account.existingFeed(withURL: feed.url) {
+			account.addFeed(existingFeed, to: container) { result in
+				switch result {
+				case .success:
+					completion(.success(()))
+				case .failure(let error):
+					completion(.failure(error))
+				}
+			}
+		} else {
+			createFeed(for: account, url: feed.url, name: feed.editedName, container: container) { result in
+				switch result {
+				case .success:
+					completion(.success(()))
+				case .failure(let error):
+					completion(.failure(error))
+				}
+			}
+		}
 	}
 	
 	func restoreFolder(for account: Account, folder: Folder, completion: @escaping (Result<Void, Error>) -> Void) {
-		fatalError()
+		let group = DispatchGroup()
+		
+		for feed in folder.topLevelFeeds {
+			
+			folder.topLevelFeeds.remove(feed)
+			
+			group.enter()
+			restoreFeed(for: account, feed: feed, container: folder) { result in
+				group.leave()
+				switch result {
+				case .success:
+					break
+				case .failure(let error):
+					os_log(.error, log: self.log, "Restore folder feed error: %@.", error.localizedDescription)
+				}
+			}
+			
+		}
+		
+		group.notify(queue: .main) {
+			account.addFolder(folder)
+			completion(.success(()))
+		}
 	}
 	
 	func markArticles(for account: Account, articles: Set<Article>, statusKey: ArticleStatus.Key, flag: Bool) -> Set<Article>? {

Frameworks/Account/Feedly/FeedlyAccountDelegateError.swift

@@ -0,0 +1,83 @@
+//
+//  FeedlyAccountDelegateError.swift
+//  Account
+//
+//  Created by Kiel Gillard on 9/10/19.
+//  Copyright © 2019 Ranchero Software, LLC. All rights reserved.
+//
+
+import Foundation
+
+enum FeedlyAccountDelegateError: LocalizedError {
+	case notLoggedIn
+	case unableToAddFolder(String)
+	case unableToRenameFolder(String, String)
+	case unableToRemoveFolder(String)
+	case unableToMoveFeedBetweenFolders(Feed, Folder, Folder)
+	case addFeedChooseFolder
+	case addFeedInvalidFolder(Folder)
+	case unableToRemoveFeed(Feed)
+	
+	var errorDescription: String? {
+		switch self {
+		case .notLoggedIn:
+			return NSLocalizedString("Please add the Feedly account again.", comment: "Feedly - Credentials not found.")
+			
+		case .unableToAddFolder(let name):
+			let template = NSLocalizedString("Could not create a folder named \"%@\".", comment: "Feedly - Could not create a folder/collection.")
+			return String(format: template, name)
+			
+		case .unableToRenameFolder(let from, let to):
+			let template = NSLocalizedString("Could not rename \"%@\" to \"%@\".", comment: "Feedly - Could not rename a folder/collection.")
+			return String(format: template, from, to)
+			
+		case .unableToRemoveFolder(let name):
+			let template = NSLocalizedString("Could not remove the folder named \"%@\".", comment: "Feedly - Could not remove a folder/collection.")
+			return String(format: template, name)
+			
+		case .unableToMoveFeedBetweenFolders(let feed, _, let to):
+			let template = NSLocalizedString("Could not move \"%@\" to \"%@\".", comment: "Feedly - Could not move a feed between folders/collections.")
+			return String(format: template, feed.nameForDisplay, to.nameForDisplay)
+			
+		case .addFeedChooseFolder:
+			return NSLocalizedString("Please choose a folder to contain the feed.", comment: "Feedly - Feed can only be added to folders.")
+			
+		case .addFeedInvalidFolder(let invalidFolder):
+			let template = NSLocalizedString("Feeds cannot be added to the \"%@\" folder.", comment: "Feedly - Feed can only be added to folders.")
+			return String(format: template, invalidFolder.nameForDisplay)
+			
+		case .unableToRemoveFeed(let feed):
+			let template = NSLocalizedString("Could not remove \"%@\".", comment: "Feedly - Could not remove a feed.")
+			return String(format: template, feed.nameForDisplay)
+		}
+	}
+	
+	var recoverySuggestion: String? {
+		switch self {
+		case .notLoggedIn:
+			return nil
+			
+		case .unableToAddFolder:
+			return nil
+			
+		case .unableToRenameFolder:
+			return nil
+			
+		case .unableToRemoveFolder:
+			return nil
+			
+		case .unableToMoveFeedBetweenFolders(let feed, let from, let to):
+			let template = NSLocalizedString("\"%@\" may be in both \"%@\" and \"%@\".", comment: "Feedly - Could not move a feed between folders/collections.")
+			return String(format: template, feed.nameForDisplay, from.nameForDisplay, to.nameForDisplay)
+			
+		case .addFeedChooseFolder:
+			return nil
+			
+		case .addFeedInvalidFolder:
+			return NSLocalizedString("Please choose a different folder to contain the feed.", comment: "Feedly - Feed can only be added to folders recovery suggestion.")
+			
+		case .unableToRemoveFeed:
+			return nil
+		}
+	}
+}

Frameworks/Account/Feedly/Models/FeedlyResourceId.swift

@@ -13,17 +13,15 @@ protocol FeedlyResourceId {
 	
 	/// The resource Id from Feedly.
 	var id: String { get }
-	
-	/// The location of the kind of resource a concrete type represents.
-	/// If the conrete type cannot strip the resource type from the Id, it should just return the Id
-	/// since the Id is a legitimate URL.
-	var url: String { get }
 }
 
 /// The Feed Resource is documented here: https://developer.feedly.com/cloud/
 struct FeedlyFeedResourceId: FeedlyResourceId {
 	var id: String
 	
+	/// The location of the kind of resource a concrete type represents.
+	/// If the conrete type cannot strip the resource type from the Id, it should just return the Id
+	/// since the Id is a legitimate URL.
 	var url: String {
 		if let range = id.range(of: "feed/"), range.lowerBound == id.startIndex {
 			var mutant = id
@@ -35,3 +33,19 @@ struct FeedlyFeedResourceId: FeedlyResourceId {
 		return id
 	}
 }
+
+extension FeedlyFeedResourceId {
+	init(url: String) {
+		self.id = "feed/\(url)"
+	}
+}
+
+struct FeedlyCategoryResourceId: FeedlyResourceId {
+	var id: String
+	
+	static func uncategorized(for userId: String) -> FeedlyCategoryResourceId {
+		// https://developer.feedly.com/cloud/#global-resource-ids
+		let id = "user/\(userId)/category/global.uncategorized"
+		return FeedlyCategoryResourceId(id: id)
+	}
+}