sync mode for div card updating

DivKit/DivKitComponents.swift

@@ -321,6 +321,10 @@ public final class DivKitComponents {
     timerStorage.set(cardId: cardId, timers: divData.timers ?? [])
   }
 
+  public func flushUpdateActions() {
+    updateAggregator.flushUpdateActions()
+  }
+
   private func onVariablesChanged(event: DivVariablesStorage.ChangeEvent) {
     switch event.kind {
     case let .global(variables):

DivKit/RunLoopCardUpdateAggregator.swift

@@ -4,7 +4,6 @@ import Foundation
 
 final class RunLoopCardUpdateAggregator {
   private var enabled: Bool = true
-  private var scheduled: Bool = false
   private var batch: [DivActionURLHandler.UpdateReason] = []
   private let updateCardAction: DivKitComponents.UpdateCardAction
   private let mainThreadAsyncRunner: MainThreadAsyncRunner
@@ -27,19 +26,22 @@ final class RunLoopCardUpdateAggregator {
   func aggregate(_ reason: DivActionURLHandler.UpdateReason) {
     Thread.assertIsMain()
     guard enabled else { return }
+    let notScheduled = batch.isEmpty
     batch.append(reason)
-    if !scheduled {
-      scheduled = true
+    if notScheduled {
       mainThreadAsyncRunner { [weak self] in
-        guard let self = self else { return }
-        if let reasons = NonEmptyArray(self.batch.merge()) {
-          self.batch = []
-          self.scheduled = false
-          self.updateCardAction(reasons)
-        }
+        self?.flushUpdateActions()
       }
     }
   }
+
+  func flushUpdateActions() {
+    guard let reasons = NonEmptyArray(self.batch.merge()) else {
+      return
+    }
+    batch = []
+    updateCardAction(reasons)
+  }
 }
 
 extension Array where Element == DivActionURLHandler.UpdateReason {