Implement mark as unread window for accounts that need it. Issue #1407

Frameworks/Account/AccountBehaviors.swift

@@ -14,25 +14,28 @@ import Foundation
     user interface as much as possible.  For example some sync services don't allow
     feeds to be in the root folder of the account.
 */
-public struct AccountBehaviors: OptionSet {
+public typealias AccountBehaviors = [AccountBehavior]
+
+public enum AccountBehavior: Equatable {
 	
 	/**
 	  Account doesn't support copies of a feed that are in a folder to be made to the root folder.
 	*/
-	public static let disallowFeedCopyInRootFolder = AccountBehaviors(rawValue: 1)
+	case disallowFeedCopyInRootFolder
 	
 	/**
 	 Account doesn't support feeds in the root folder.
 	*/
-	public static let disallowFeedInRootFolder = AccountBehaviors(rawValue: 2)
+	case disallowFeedInRootFolder
 	
 	/**
 	 Account doesn't support OPML imports
 	*/
-	public static let disallowOPMLImports = AccountBehaviors(rawValue: 4)
+	case disallowOPMLImports
+	
+	/**
+	Account doesn't allow mark as read after a period of days
+	*/
+	case disallowMarkAsUnreadAfterPeriod(Int)
 
-	public let rawValue: Int
-	public init(rawValue: Int) {
-		self.rawValue = rawValue
-	}
 }

Frameworks/Account/Feedly/FeedlyAccountDelegate.swift

@@ -25,7 +25,7 @@ final class FeedlyAccountDelegate: AccountDelegate {
 
 	// TODO: Kiel, if you decide not to support OPML import you will have to disallow it in the behaviors
 	// See https://developer.feedly.com/v3/opml/
-	var behaviors: AccountBehaviors = [.disallowFeedInRootFolder]
+	var behaviors: AccountBehaviors = [.disallowFeedInRootFolder, .disallowMarkAsUnreadAfterPeriod(31)]
 	
 	let isOPMLImportSupported = false
 	

Shared/Data/ArticleUtilities.swift

@@ -64,6 +64,25 @@ extension Article {
 		return datePublished ?? dateModified ?? status.dateArrived
 	}
 	
+	var isAvailableToMarkUnread: Bool {
+		guard let markUnreadWindow = account?.behaviors.compactMap( { behavior -> Int? in
+			switch behavior {
+			case .disallowMarkAsUnreadAfterPeriod(let days):
+				return days
+			default:
+				return nil
+			}
+		}).first else {
+			return true
+		}
+		
+		if logicalDatePublished.byAdding(days: markUnreadWindow) > Date() {
+			return true
+		} else {
+			return false
+		}
+	}
+
 	func iconImage() -> IconImage? {
 		if let authors = authors, authors.count == 1, let author = authors.first {
 			if let image = appDelegate.authorAvatarDownloader.image(for: author) {

iOS/Article/ArticleViewController.swift

@@ -157,9 +157,11 @@ class ArticleViewController: UIViewController {
 
 		if article.status.read {
 			readBarButtonItem.image = AppAssets.circleOpenImage
+			readBarButtonItem.isEnabled = article.isAvailableToMarkUnread
 			readBarButtonItem.accLabelText = NSLocalizedString("Mark Article Unread", comment: "Mark Article Unread")
 		} else {
 			readBarButtonItem.image = AppAssets.circleClosedImage
+			readBarButtonItem.isEnabled = true
 			readBarButtonItem.accLabelText = NSLocalizedString("Selected - Mark Article Unread", comment: "Selected - Mark Article Unread")
 		}
 		

iOS/Article/WebViewController.swift

@@ -264,7 +264,9 @@ extension WebViewController: UIContextMenuInteractionDelegate {
 			if let action = self.nextArticleAction() {
 				actions.append(action)
 			}
-			actions.append(self.toggleReadAction())
+			if let action = self.toggleReadAction() {
+				actions.append(action)
+			}
 			actions.append(self.toggleStarredAction())
 			if let action = self.nextUnreadArticleAction() {
 				actions.append(action)
@@ -642,10 +644,11 @@ private extension WebViewController {
 		}
 	}
 	
-	func toggleReadAction() -> UIAction {
-		let read = article?.status.read ?? false
-		let title = read ? NSLocalizedString("Mark as Unread", comment: "Mark as Unread") : NSLocalizedString("Mark as Read", comment: "Mark as Read")
-		let readImage = read ? AppAssets.circleClosedImage : AppAssets.circleOpenImage
+	func toggleReadAction() -> UIAction? {
+		guard let article = article, !article.status.read || article.isAvailableToMarkUnread else { return nil }
+		
+		let title = article.status.read ? NSLocalizedString("Mark as Unread", comment: "Mark as Unread") : NSLocalizedString("Mark as Read", comment: "Mark as Read")
+		let readImage = article.status.read ? AppAssets.circleClosedImage : AppAssets.circleOpenImage
 		return UIAction(title: title, image: readImage) { [weak self] action in
 			self?.coordinator.toggleReadForCurrentArticle()
 		}

iOS/MasterTimeline/MasterTimelineViewController.swift

@@ -217,6 +217,7 @@ class MasterTimelineViewController: UITableViewController, UndoableCommandRunner
 
 	override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
 		guard let article = dataSource.itemIdentifier(for: indexPath) else { return nil }
+		guard !article.status.read || article.isAvailableToMarkUnread else { return nil }
 
 		// Set up the read action
 		let readTitle = article.status.read ?
@@ -314,7 +315,10 @@ class MasterTimelineViewController: UITableViewController, UndoableCommandRunner
 			guard let self = self else { return nil }
 			
 			var actions = [UIAction]()
-			actions.append(self.toggleArticleReadStatusAction(article))
+			if let action = self.toggleArticleReadStatusAction(article) {
+				actions.append(action)
+			}
+			
 			actions.append(self.toggleArticleStarStatusAction(article))
 
 			if let action = self.markAboveAsReadAction(article) {
@@ -672,7 +676,8 @@ private extension MasterTimelineViewController {
 		return nil
 	}
 	
-	func toggleArticleReadStatusAction(_ article: Article) -> UIAction {
+	func toggleArticleReadStatusAction(_ article: Article) -> UIAction? {
+		guard !article.status.read || article.isAvailableToMarkUnread else { return nil }
 		
 		let title = article.status.read ?
 			NSLocalizedString("Mark as Unread", comment: "Mark as Unread") :

iOS/SceneCoordinator.swift

@@ -1008,6 +1008,7 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 	}
 	
 	func toggleRead(_ article: Article) {
+		guard !article.status.read || article.isAvailableToMarkUnread else { return }
 		markArticlesWithUndo([article], statusKey: .read, flag: !article.status.read)
 	}