DispatchGroup to TaskGroup refactor

Riot/Managers/PushRulesUpdater/PushRulesUpdater.swift

@@ -44,31 +44,31 @@ final class PushRulesUpdater {
 
 private extension PushRulesUpdater {
     func syncRulesIfNeeded() {
-        let dispatchGroup: DispatchGroup = .init()
-
-        for rule in rules {
-            guard let ruleId = rule.pushRuleId else {
-                continue
+        Task {
+           await withTaskGroup(of: Void.self) { [rules] group in
+                for rule in rules {
+                    guard let ruleId = rule.pushRuleId else {
+                        continue
+                    }
+
+                    let relatedRules = ruleId.syncedRules(in: rules)
+
+                    for relatedRule in relatedRules {
+                        guard rule.hasSameContentOf(relatedRule) == false else {
+                            continue
+                        }
+
+                        group.addTask { [weak self] in
+                            try? await self?.sync(relatedRuleId: relatedRule.ruleId, with: rule)
+                        }
+                    }
+                }
             }
 
-            let relatedRules = ruleId.syncedRules(in: rules)
-
-            for relatedRule in relatedRules {
-                guard rule.hasSameContentOf(relatedRule) == false else {
-                    continue
-                }
-
-                dispatchGroup.enter()
-                Task {
-                    try? await sync(relatedRuleId: relatedRule.ruleId, with: rule)
-                    dispatchGroup.leave()
-                }
+            await MainActor.run { [weak self] in
+                self?.didCompleteUpdateSubject.send(())
             }
         }
-
-        dispatchGroup.notify(queue: .main) { [weak self] in
-            self?.didCompleteUpdateSubject.send(())
-        }
     }
 
     func sync(relatedRuleId: String, with rule: NotificationPushRuleType) async throws {