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TUIKit/TUIRoomKit/Source/View/ViewModel/RaiseHandApplicationListViewModel.swift

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+//
+//  RaiseHandApplicationListViewModel.swift
+//  TUIRoomKit
+//
+//  Created by janejntang on 2023/1/13.
+//  Copyright © 2023 Tencent. All rights reserved.
+//
+
+import Foundation
+import RTCRoomEngine
+
+protocol RaiseHandApplicationListViewResponder: NSObject {
+    func reloadApplyListView()
+    func makeToast(text: String)
+    func updatePlaceholderViewState(isShown: Bool)
+    func updateApplyButtonState(isEnabled: Bool)
+}
+
+class RaiseHandApplicationListViewModel: NSObject {
+    weak var viewResponder: RaiseHandApplicationListViewResponder? = nil
+    var engineManager: EngineManager {
+        EngineManager.shared
+    }
+    var roomInfo: TUIRoomInfo {
+        engineManager.store.roomInfo
+    }
+    var inviteSeatList: [RequestEntity] = []
+    
+    var isPlaceholderViewShown: Bool {
+        return inviteSeatList.isEmpty
+    }
+    
+    var isApplyButtonEnabled: Bool {
+        return !inviteSeatList.isEmpty
+    }
+    
+    override init() {
+        super.init()
+        inviteSeatList = engineManager.store.inviteSeatList
+        EngineEventCenter.shared.subscribeUIEvent(key: .TUIRoomKitService_RenewSeatList, responder: self)
+    }
+    
+    func respondAllRequest(isAgree: Bool) {
+        var isShownStageFullToast = false
+        for requestEntity in engineManager.store.inviteSeatList {
+            engineManager.responseRemoteRequest(requestEntity.requestId, agree: isAgree) { [weak self] in
+                guard let self = self else { return }
+                self.engineManager.store.deleteTakeSeatRequest(requestId: requestEntity.requestId)
+            } onError: { [weak self] code, message in
+                guard let self = self else { return }
+                guard code == .allSeatOccupied, !isShownStageFullToast else { return }
+                self.viewResponder?.makeToast(text: .onStageNumberReachedLimitText)
+                isShownStageFullToast = true
+            }
+        }
+    }
+    
+    func respondRequest(isAgree: Bool, request: RequestEntity) {
+        engineManager.responseRemoteRequest(request.requestId, agree: isAgree) { [weak self] in
+            guard let self = self else { return }
+            self.engineManager.store.deleteTakeSeatRequest(requestId: request.requestId)
+            self.reloadApplyListView()
+        } onError: { [weak self] code, message in
+            guard let self = self else { return }
+            guard code == .allSeatOccupied else { return }
+            self.viewResponder?.makeToast(text: .onStageNumberReachedLimitText)
+        }
+    }
+    
+    func reloadApplyListView() {
+        inviteSeatList = engineManager.store.inviteSeatList
+        viewResponder?.updatePlaceholderViewState(isShown: isPlaceholderViewShown)
+        viewResponder?.updateApplyButtonState(isEnabled: isApplyButtonEnabled)
+        viewResponder?.reloadApplyListView()
+    }
+    
+    deinit {
+        EngineEventCenter.shared.unsubscribeUIEvent(key: .TUIRoomKitService_RenewSeatList, responder: self)
+        debugPrint("deinit \(self)")
+    }
+}
+
+extension RaiseHandApplicationListViewModel: RoomKitUIEventResponder {
+    func onNotifyUIEvent(key: EngineEventCenter.RoomUIEvent, Object: Any?, info: [AnyHashable : Any]?) {
+        if key == .TUIRoomKitService_RenewSeatList {
+            self.reloadApplyListView()
+        }
+    }
+}
+
+private extension String {
+    static var onStageNumberReachedLimitText: String {
+        localized("The stage is full")
+    }
+}
+