vector-im/element-x-ios/issues/53 - Adopt MainActors, dispatch heavy operations do detached tasks and ensure combine publisher call back on the right queue

ElementX/Sources/Services/Room/RoomSummary/EventBriefFactoryProtocol.swift

@@ -8,6 +8,7 @@
 
 import Foundation
 
+@MainActor
 protocol EventBriefFactoryProtocol {
     func eventBriefForMessage(_ message: RoomMessageProtocol?) async -> EventBrief?
 }

ElementX/Sources/Services/Room/RoomSummary/RoomSummary.swift

@@ -98,13 +98,13 @@ class RoomSummary: RoomSummaryProtocol {
         }
         
         await withTaskGroup(of: Void.self) { group in
-            group.addTask {
+            group.addTask(priority: .medium) {
                 await self.loadDisplayName()
             }
-            group.addTask {
+            group.addTask(priority: .medium) {
                 await self.loadAvatar()
             }
-            group.addTask {
+            group.addTask(priority: .medium) {
                 await self.loadLastMessage()
             }
         }

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProtocol.swift

@@ -13,6 +13,7 @@ enum RoomSummaryCallback {
     case updatedData
 }
 
+@MainActor
 protocol RoomSummaryProtocol {
     var id: String { get }
     var name: String? { get }