Make hasAtLeastOneFeed() a Container protocol function with a default implementation. Scrap Account’s feedIDDictionary, since it’s not needed. (Well, profiling may tell us later to bring it back.)

Frameworks/Account/Account.swift

@@ -53,7 +53,6 @@ public final class Account: DisplayNameProvider, UnreadCountProvider, Container,
 	let dataFolder: String
 	let database: Database
 	let delegate: AccountDelegate
-	var feedIDDictionary = [String: Feed]()
 	var username: String?
 	var saveTimer: Timer?
 
@@ -106,12 +105,6 @@ public final class Account: DisplayNameProvider, UnreadCountProvider, Container,
 		}
 	}
 
-	var hasAtLeastOneFeed: Bool {
-		get {
-			return !feedIDDictionary.isEmpty
-		}
-	}
-
 	var supportsSubFolders: Bool {
 		get {
 			return delegate.supportsSubFolders
@@ -215,7 +208,6 @@ public final class Account: DisplayNameProvider, UnreadCountProvider, Container,
 			didAddFeed = true
 		}
 		
-		updateFeedIDDictionary()
 		return didAddFeed // TODO
 	}
 
@@ -346,7 +338,6 @@ private extension Account {
 			return
 		}
 		children = objects(with: childrenArray)
-		updateFeedIDDictionary()
 	}
 
 	func diskDictionary() -> NSDictionary {
@@ -413,15 +404,6 @@ private extension Account {
 
 private extension Account {
 
-	func updateFeedIDDictionary() {
-
-		var d = [String: Feed]()
-		for feed in flattenedFeeds() {
-			d[feed.feedID] = feed
-		}
-		feedIDDictionary = d
-	}
-	
 	func topLevelObjectsContainsFeed(_ feed: Feed) -> Bool {
 		
 		return children.contains(where: { (object) -> Bool in

Frameworks/Account/AccountManager.swift

@@ -101,7 +101,7 @@ public final class AccountManager: UnreadCountProvider {
 	public func anyAccountHasAtLeastOneFeed() -> Bool {
 
 		for account in accounts {
-			if account.hasAtLeastOneFeed {
+			if account.hasAtLeastOneFeed() {
 				return true
 			}
 		}

Frameworks/Account/Container.swift

@@ -20,6 +20,7 @@ public protocol Container {
 
 	var children: [AnyObject] { get }
 
+	func hasAtLeastOneFeed() -> Bool
 	func objectIsChild(_ object: AnyObject) -> Bool
 
 	//Recursive
@@ -35,6 +36,22 @@ public protocol Container {
 
 public extension Container {
 
+	func hasAtLeastOneFeed() -> Bool {
+
+		for child in children {
+			if let feed = child as? Feed {
+				return true
+			}
+			if let folder = child as? Folder {
+				if folder.hasAtLeastOneFeed() {
+					return true
+				}
+			}
+		}
+
+		return false
+	}
+
 	func objectIsChild(_ object: AnyObject) -> Bool {
 
 		for child in children {