Various improvements

submodules/TelegramCore/Sources/TelegramEngine/Stickers/SavedStickers.swift

@@ -0,0 +1,37 @@
+import Foundation
+import Postbox
+import TelegramApi
+import SwiftSignalKit
+
+public enum SavedStickerResult {
+    case generic
+    case limitExceeded
+}
+
+func _internal_toggleStickerSaved(postbox: Postbox, network: Network, accountPeerId: PeerId, file: TelegramMediaFile, saved: Bool) -> Signal<SavedStickerResult, AddSavedStickerError> {
+    if saved {
+        return postbox.transaction { transaction -> Signal<SavedStickerResult, AddSavedStickerError> in
+            let isPremium = transaction.getPeer(accountPeerId)?.isPremium ?? false
+            let items = transaction.getOrderedListItems(collectionId: Namespaces.OrderedItemList.CloudSavedStickers)
+            
+            let appConfiguration = transaction.getPreferencesEntry(key: PreferencesKeys.appConfiguration)?.get(AppConfiguration.self) ?? .defaultValue
+            let userLimitsConfiguration = UserLimitsConfiguration(appConfiguration: appConfiguration, isPremium: isPremium)
+            
+            return addSavedSticker(postbox: postbox, network: network, file: file)
+            |> map { _ -> SavedStickerResult in
+                return .generic
+            }
+            |> then(
+                .single(items.count == userLimitsConfiguration.maxFavedStickerCount ? .limitExceeded : .generic)
+            )
+        }
+        |> castError(AddSavedStickerError.self)
+        |> switchToLatest
+    } else {
+        return removeSavedSticker(postbox: postbox, mediaId: file.fileId)
+        |> map { _ -> SavedStickerResult in
+            return .generic
+        }
+        |> castError(AddSavedStickerError.self)
+    }
+}