Implemented group by feed for iOS

iOS/AppDefaults.swift

@@ -12,10 +12,11 @@ struct AppDefaults {
 
 	struct Key {
 		static let firstRunDate = "firstRunDate"
+		static let timelineGroupByFeed = "timelineGroupByFeed"
+		static let timelineNumberOfLines = "timelineNumberOfLines"
 		static let timelineSortDirection = "timelineSortDirection"
 		static let refreshInterval = "refreshInterval"
 		static let lastRefresh = "lastRefresh"
-		static let timelineNumberOfLines = "timelineNumberOfLines"
 	}
 
 	static let isFirstRun: Bool = {
@@ -35,6 +36,15 @@ struct AppDefaults {
 			UserDefaults.standard.set(newValue.rawValue, forKey: Key.refreshInterval)
 		}
 	}
+	
+	static var timelineGroupByFeed: Bool {
+		get {
+			return bool(for: Key.timelineGroupByFeed)
+		}
+		set {
+			setBool(for: Key.timelineGroupByFeed, newValue)
+		}
+	}
 
 	static var timelineSortDirection: ComparisonResult {
 		get {
@@ -64,7 +74,10 @@ struct AppDefaults {
 	}
 	
 	static func registerDefaults() {
-		let defaults: [String : Any] = [Key.timelineSortDirection: ComparisonResult.orderedDescending.rawValue, Key.refreshInterval: RefreshInterval.everyHour.rawValue, Key.timelineNumberOfLines: 3]
+		let defaults: [String : Any] = [Key.refreshInterval: RefreshInterval.everyHour.rawValue,
+										Key.timelineGroupByFeed: false,
+										Key.timelineNumberOfLines: 3,
+										Key.timelineSortDirection: ComparisonResult.orderedDescending.rawValue]
 		UserDefaults.standard.register(defaults: defaults)
 	}
 

iOS/SceneCoordinator.swift

@@ -68,6 +68,13 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 			}
 		}
 	}
+	private(set) var groupByFeed = AppDefaults.timelineGroupByFeed {
+		didSet {
+			if groupByFeed != oldValue {
+				groupByFeedDidChange()
+			}
+		}
+	}
 
 	private let treeControllerDelegate = FeedTreeControllerDelegate()
 	private lazy var treeController: TreeController = {
@@ -412,6 +419,7 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 
 	@objc func userDefaultsDidChange(_ note: Notification) {
 		self.sortDirection = AppDefaults.timelineSortDirection
+		self.groupByFeed = AppDefaults.timelineGroupByFeed
 	}
 	
 	@objc func accountDidDownloadArticles(_ note: Notification) {
@@ -1344,8 +1352,12 @@ private extension SceneCoordinator {
 		replaceArticles(with: Set(articles), animate: true)
 	}
 	
+	func groupByFeedDidChange() {
+		replaceArticles(with: Set(articles), animate: true)
+	}
+	
 	func replaceArticles(with unsortedArticles: Set<Article>, animate: Bool) {
-		let sortedArticles = Array(unsortedArticles).sortedByDate(sortDirection)
+		let sortedArticles = Array(unsortedArticles).sortedByDate(sortDirection, groupByFeed: groupByFeed)
 		
 		if articles != sortedArticles {
 			

iOS/Settings/SettingsView.swift

@@ -56,6 +56,9 @@ struct SettingsView : View {
 			Toggle(isOn: $viewModel.sortOldestToNewest) {
 				Text("Sort Oldest to Newest")
 			}
+			Toggle(isOn: $viewModel.groupByFeed) {
+				Text("Group By Feed")
+			}
 			Stepper(value: $viewModel.timelineNumberOfLines, in: 2...6) {
 				Text("Number of Text Lines: \(viewModel.timelineNumberOfLines)")
 			}
@@ -221,6 +224,16 @@ struct SettingsView : View {
 			}
 		}
 		
+		var groupByFeed: Bool {
+			get {
+				return AppDefaults.timelineGroupByFeed
+			}
+			set {
+				objectWillChange.send()
+				AppDefaults.timelineGroupByFeed = newValue
+			}
+		}
+		
 		var timelineNumberOfLines: Int {
 			get {
 				return AppDefaults.timelineNumberOfLines