[WIP] Folder tags

submodules/TelegramCore/Sources/TelegramEngine/Data/ChatListData.swift

@@ -3,6 +3,23 @@ import Postbox
 
 public extension TelegramEngine.EngineData.Item {
     enum ChatList {
-        
+        public struct FiltersDisplayTags: TelegramEngineDataItem, PostboxViewDataItem {
+            public typealias Result = Bool
+
+            public init() {
+            }
+
+            var key: PostboxViewKey {
+                return .preferences(keys: Set([PreferencesKeys.chatListFilters]))
+            }
+
+            func extract(view: PostboxView) -> Result {
+                guard let view = view as? PreferencesView else {
+                    preconditionFailure()
+                }
+                let state = view.values[PreferencesKeys.chatListFilters]?.get(ChatListFiltersState.self) ?? ChatListFiltersState.default
+                return state.displayTags
+            }
+        }
     }
 }