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TUIKit/TUIRoomKit/RoomExtension/View/ViewModel/RoomMessageViewModel.swift

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+//
+//  RoomMessageViewModel.swift
+//  TUIRoomKit
+//
+//  Created by janejntang on 2023/5/10.
+//  Copyright © 2023 Tencent. All rights reserved.
+//
+
+import Foundation
+import RTCRoomEngine
+import TUICore
+import TIMCommon
+
+protocol RoomMessageViewResponder: NSObject {
+    func updateStackView()
+    func updateRoomStatus()
+    func updateEnteredRoom()
+    func updateExitRoom()
+}
+
+class RoomMessageViewModel: NSObject {
+    var message: RoomMessageModel
+    private var engineManager: EngineManager {
+        EngineManager.shared
+    }
+    lazy var userId: String = {
+        return TUILogin.getUserID() ?? EngineManager.shared.store.currentUser.userId
+    }()
+    var messageManager: RoomMessageManager {
+        RoomMessageManager.shared
+    }
+    let roomManager = RoomManager.shared
+    weak var viewResponder: RoomMessageViewResponder?
+    init(message: RoomMessageModel) {
+        self.message = message
+        super.init()
+        roomManager.roomObserver.addListener(listener: self)
+    }
+    
+    deinit {
+        roomManager.roomObserver.removeListener(listener: self)
+        debugPrint("deinit \(self)")
+    }
+    
+    func changeMessage(message: RoomMessageModel) {
+        self.message = message
+        viewResponder?.updateStackView()
+        viewResponder?.updateRoomStatus()
+    }
+    
+    func enterRoomAction() {
+        guard BusinessSceneUtil.canJoinRoom() else { return }
+        if roomManager.isEnteredOtherRoom(roomId: message.roomId) {
+            roomManager.exitOrDestroyPreviousRoom { [weak self] in
+                guard let self = self else { return }
+                self.enterRoom()
+            } onError: { [weak self] code, message in
+                debugPrint("exitRoom,code:\(code),message:\(message)")
+                guard let self = self else { return }
+                self.enterRoom()
+            }
+        } else {
+            enterRoom()
+        }
+    }
+    
+    private func enterRoom() {
+        if !engineManager.store.isEnteredRoom {
+            roomManager.enterRoom(roomId: message.roomId)
+        } else {
+            EngineEventCenter.shared.notifyUIEvent(key: .TUIRoomKitService_ShowRoomMainView, param: [:])
+        }
+    }
+    
+    func inviteUserAction() {
+        guard message.groupId.count > 0 else { return }
+        let inviter = TUILoginUserInfo()
+        inviter.userId = userId
+        inviter.userName = TUILogin.getNickName() ?? ""
+        inviter.avatarUrl = TUILogin.getFaceUrl() ?? ""
+        InviteToJoinRoomManager.startInviteToJoinRoom(message: message, inviter: inviter)
+    }
+}
+
+extension RoomMessageViewModel: RoomObserverListener {
+    func onRoomEnter(messageId: String, code: Int, message: String) {
+        if code == 0, messageId == self.message.messageId {
+            viewResponder?.updateEnteredRoom()
+        }
+    }
+    func onRoomExit(messageId: String) {
+        if messageId == self.message.messageId {
+            viewResponder?.updateExitRoom()
+        }
+    }
+}