Preload sounds

submodules/NotificationSoundSelectionUI/Sources/NotificationSoundSelection.swift

@@ -377,6 +377,7 @@ public func notificationSoundSelectionController(context: AccountContext, update
     
     let playSoundDisposable = MetaDisposable()
     let soundActionDisposable = MetaDisposable()
+    let fetchedSoundsDisposable = ensureDownloadedNotificationSoundList(postbox: context.account.postbox).start()
     
     let arguments = NotificationSoundSelectionArguments(account: context.account, selectSound: { sound in
         updateState { state in
@@ -422,6 +423,7 @@ public func notificationSoundSelectionController(context: AccountContext, update
     let controller = ItemListController(context: context, state: signal |> afterDisposed {
         playSoundDisposable.dispose()
         soundActionDisposable.dispose()
+        fetchedSoundsDisposable.dispose()
     })
     controller.enableInteractiveDismiss = true
     if isModal {

submodules/SettingsUI/Sources/Notifications/Exceptions/NotificationExceptionControllerNode.swift

@@ -694,6 +694,7 @@ final class NotificationExceptionsControllerNode: ViewControllerTracingNode {
     
     private let presentationDataValue = Promise<(PresentationTheme, PresentationStrings)>()
     private var listDisposable: Disposable?
+    private var fetchedSoundsDisposable: Disposable?
     
     private var arguments: NotificationExceptionArguments?
     private let stateValue: Atomic<NotificationExceptionState>
@@ -996,12 +997,15 @@ final class NotificationExceptionsControllerNode: ViewControllerTracingNode {
             
             self?.enqueueTransition(transition)
         })
+        
+        self.fetchedSoundsDisposable = ensureDownloadedNotificationSoundList(postbox: context.account.postbox).start()
     }
     
     deinit {
         self.listDisposable?.dispose()
         self.navigationActionDisposable.dispose()
         self.updateNotificationsDisposable.dispose()
+        self.fetchedSoundsDisposable?.dispose()
     }
     
     func updatePresentationData(_ presentationData: PresentationData) {

submodules/TelegramCore/Sources/TelegramEngine/Peers/NotificationSoundList.swift

@@ -139,6 +139,35 @@ func _internal_setCachedNotificationSoundList(transaction: Transaction, notifica
     }
 }
 
+public func ensureDownloadedNotificationSoundList(postbox: Postbox) -> Signal<Never, NoError> {
+    return postbox.transaction { transaction -> Signal<Never, NoError> in
+        var signals: [Signal<Never, NoError>] = []
+        
+        if let notificationSoundList = _internal_cachedNotificationSoundList(transaction: transaction) {
+            var resources: [MediaResource] = []
+            
+            for sound in notificationSoundList.sounds {
+                resources.append(sound.file.resource)
+            }
+            
+            for resource in resources {
+                signals.append(
+                    fetchedMediaResource(mediaBox: postbox.mediaBox, reference: .standalone(resource: resource))
+                    |> ignoreValues
+                    |> `catch` { _ -> Signal<Never, NoError> in
+                        return .complete()
+                    }
+                )
+            }
+        }
+        
+        return combineLatest(signals)
+        |> ignoreValues
+    }
+    |> switchToLatest
+    |> ignoreValues
+}
+
 private func pollNotificationSoundList(postbox: Postbox, network: Network) -> Signal<Never, NoError> {
     return Signal<Never, NoError> { subscriber in
         let signal: Signal<Never, NoError> = _internal_cachedNotificationSoundList(postbox: postbox)