[FEAT/#151] 참가자들의 화면 순서를 동기화 합니다.

PhotoGether/DataLayer/PhotoGetherData/PhotoGetherData/ConnectionRepositoryImpl.swift

@@ -9,8 +9,12 @@ public final class ConnectionRepositoryImpl: ConnectionRepository {
 
     public var clients: [ConnectionClient]
 
+    private let didEnterNewUserSubject = PassthroughSubject<(UserInfo, UIView), Never>()
+    public var didEnterNewUserPublisher: AnyPublisher<(UserInfo, UIView), Never> {
+        didEnterNewUserSubject.eraseToAnyPublisher()
+    }
     private let _localVideoView = CapturableVideoView()
-    private var localUserInfo: UserInfo?
+    public private(set) var localUserInfo: UserInfo?
 
     public var localVideoView: UIView { _localVideoView }
     public var capturedLocalVideo: UIImage? { _localVideoView.capturedImage }
@@ -225,7 +229,10 @@ extension ConnectionRepositoryImpl {
             }, receiveValue: {  [weak self] entity in
                 guard let self else { return }
                 let newUser = entity.newUser
-                let emptyClient = clients.first(where: { $0.remoteUserInfo == nil })
+                guard let emptyClient = clients.first(where: { $0.remoteUserInfo == nil }) else {
+                    PTGDataLogger.log("방이 가득 찼는데 누군가 입장했어요!")
+                    return
+                }
 
                 guard let viewPosition = UserInfo.ViewPosition(rawValue: newUser.initialPosition),
                       let roomID = self.localUserInfo?.roomID
@@ -238,8 +245,9 @@ extension ConnectionRepositoryImpl {
                     viewPosition: viewPosition,
                     roomID: roomID
                 )
-
-                emptyClient?.setRemoteUserInfo(newUserInfoEntity)
+
+                emptyClient.setRemoteUserInfo(newUserInfoEntity)
+                didEnterNewUserSubject.send((newUserInfoEntity, emptyClient.remoteVideoView))
                 PTGDataLogger.log("newUser Entered: \(newUserInfoEntity)")
             })
             .store(in: &cancellables)
@@ -274,6 +282,7 @@ extension ConnectionRepositoryImpl {
     private func setLocalUserInfo(entity: RoomOwnerEntity) -> RoomOwnerEntity {
         guard let localUserInfo = localUserInfo(for: entity) else { return entity }
         self.localUserInfo = localUserInfo
+        self.didEnterNewUserSubject.send((localUserInfo, localVideoView))
         return entity
     }
 
@@ -305,7 +314,7 @@ extension ConnectionRepositoryImpl {
     private func localUserInfo(for entity: RoomOwnerEntity) -> UserInfo? {
         return UserInfo(
             id: entity.hostID,
-            nickname: "내가 호스트다",
+            nickname: String(entity.hostID.suffix(4)), // TODO: 서버에서 받아온 닉네임으로 변경 예정
             isHost: true,
             viewPosition: .topLeading,
             roomID: entity.roomID

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomain/UseCaseImpl/DidEnterNewUserPublisherUseCaseImpl.swift

@@ -0,0 +1,14 @@
+import UIKit
+import Combine
+import PhotoGetherDomainInterface
+
+public final class DidEnterNewUserPublisherUseCaseImpl: DidEnterNewUserPublisherUseCase {
+    public func publisher() -> AnyPublisher<(UserInfo, UIView), Never> {
+        return connectionRepository.didEnterNewUserPublisher
+    }
+    private let connectionRepository: ConnectionRepository
+
+    public init(connectionRepository: ConnectionRepository) {
+        self.connectionRepository = connectionRepository
+    }
+}

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomain/UseCaseImpl/GetLocalVideoUseCaseImpl.swift

@@ -3,9 +3,8 @@ import UIKit
 import PhotoGetherDomainInterface
 
 public final class GetLocalVideoUseCaseImpl: GetLocalVideoUseCase {
-    public func execute() -> UIView {
-        // TODO: 리포지토리에서 하나의 localVideoView만 들고 있도록 변경 예정
-        connectionRepository.localVideoView
+    public func execute() -> (UserInfo?, UIView) {
+        return (connectionRepository.localUserInfo, connectionRepository.localVideoView)
     }
 
     private let connectionRepository: ConnectionRepository

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomain/UseCaseImpl/GetRemoteVideoUseCaseImpl.swift

@@ -3,16 +3,8 @@ import UIKit
 import PhotoGetherDomainInterface
 
 public final class GetRemoteVideoUseCaseImpl: GetRemoteVideoUseCase {
-    public func execute() -> [UIView] {
-        let sortedClients = connectionRepository.clients
-            .sorted { lhs, rhs in
-                let lhsPosition = lhs.remoteUserInfo?.viewPosition.rawValue ?? Int.max
-                let rhsPosition = rhs.remoteUserInfo?.viewPosition.rawValue ?? Int.max
-                return lhsPosition < rhsPosition
-            }
-            .map { $0.remoteVideoView }
-
-        return sortedClients
+    public func execute() -> [(UserInfo?, UIView)] {
+        return connectionRepository.clients.map { ($0.remoteUserInfo, $0.remoteVideoView) }
     }
 
     private let connectionRepository: ConnectionRepository

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomainInterface/Entity/UserInfo.swift

@@ -9,9 +9,9 @@ public struct UserInfo: Identifiable {
 
     public enum ViewPosition: Int {
         case topLeading
+        case bottomTrailing
         case topTrailing
         case bottomLeading
-        case bottomTrailing
     }
 
     public init(

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomainInterface/Repository/ConnectionRepository.swift

@@ -2,6 +2,10 @@ import UIKit
 import Combine
 
 public protocol ConnectionRepository {
+    var didEnterNewUserPublisher: AnyPublisher<(UserInfo, UIView), Never> { get }
+
+    var localUserInfo: UserInfo? { get }
+
     var clients: [ConnectionClient] { get }
     var localVideoView: UIView { get }
     var capturedLocalVideo: UIImage? { get }

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomainInterface/UseCase/DidEnterNewUserPublisherUseCase.swift

@@ -0,0 +1,6 @@
+import UIKit
+import Combine
+
+public protocol DidEnterNewUserPublisherUseCase {
+    func publisher() -> AnyPublisher<(UserInfo, UIView), Never>
+}

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomainInterface/UseCase/GetLocalVideoUseCase.swift

@@ -2,5 +2,5 @@ import Foundation
 import UIKit
 
 public protocol GetLocalVideoUseCase {
-    func execute() -> UIView
+    func execute() -> (UserInfo?, UIView)
 }

PhotoGether/DomainLayer/PhotoGetherDomain/PhotoGetherDomainInterface/UseCase/GetRemoteVideoUseCase.swift

@@ -2,5 +2,5 @@ import Foundation
 import UIKit
 
 public protocol GetRemoteVideoUseCase {
-    func execute() -> [UIView]
+    func execute() -> [(UserInfo?, UIView)]
 }

PhotoGether/PhotoGether/App/SceneDelegate.swift

@@ -82,6 +82,10 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
             connectionRepository: connectionRepository
         )
 
+        let didEnterNewUserPublisherUseCase: DidEnterNewUserPublisherUseCase = DidEnterNewUserPublisherUseCaseImpl(
+            connectionRepository: connectionRepository
+        )
+
         let photoRoomViewModel: PhotoRoomViewModel = PhotoRoomViewModel(
             captureVideosUseCase: captureVideosUseCase
         )
@@ -97,7 +101,8 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
             sendOfferUseCase: sendOfferUseCase,
             getLocalVideoUseCase: getLocalVideoUseCase,
             getRemoteVideoUseCase: getRemoteVideoUseCase,
-            createRoomUseCase: createRoomUseCase
+            createRoomUseCase: createRoomUseCase,
+            didEnterNewUserPublisherUseCase: didEnterNewUserPublisherUseCase
         )
 
         let waitingRoomViewController: WaitingRoomViewController = WaitingRoomViewController(

PhotoGether/PresentationLayer/BaseFeature/BaseFeature/Extension/UIViewController+ShowToast.swift

@@ -2,7 +2,17 @@ import UIKit
 import DesignSystem
 
 public extension UIViewController {
+    private struct ToastState {
+        static var presentedToast: UIView?
+    }
+
     func showToast(message: String, duration: TimeInterval = 2.0) {
+        // 이미 토스트가 있다면 제거
+        if let existingToast = ToastState.presentedToast {
+            existingToast.removeFromSuperview()
+            ToastState.presentedToast = nil
+        }
+
         let padding = UIEdgeInsets(top: 8, left: 20, bottom: 8, right: 20)
         let toastLabel: PTGPaddingLabel = {
             let lbl = PTGPaddingLabel(padding: padding)
@@ -23,6 +33,7 @@ public extension UIViewController {
         }()
 
         view.addSubview(toastLabel)
+        ToastState.presentedToast = toastLabel
 
         let maxWidth: CGFloat = view.frame.width > 0 ? view.frame.width * 0.7 : 300
 

PhotoGether/PresentationLayer/DesignSystem/DesignSystem/Source/PTGParticipantsGridView.swift

@@ -1,11 +1,21 @@
 import UIKit
 import SnapKit
 
-public enum ParticipantPosition {
+public enum ParticipantPosition: Int {
     case topLeading
+    case bottomTrailing
     case topTrailing
     case bottomLeading
-    case bottomTrailing
+
+    public init?(rawValue: Int) {
+        switch rawValue {
+        case 0: self = .topLeading
+        case 1: self = .bottomTrailing
+        case 2: self = .topTrailing
+        case 3: self = .bottomLeading
+        default: return nil
+        }
+    }
 }
 
 public final class PTGParticipantsGridView: UIView {
@@ -105,6 +115,3 @@ extension PTGParticipantsGridView {
         static let itemSpacing: CGFloat = 11
     }
 }
-
-
-

PhotoGether/PresentationLayer/WaitingRoomFeature/WaitingRoomFeature/Source/View/WaitingRoomView.swift

@@ -79,8 +79,7 @@ private extension WaitingRoomView {
 
     func configureUI() {
         self.backgroundColor = PTGColor.gray90.color
-
-        startButton.setTitle(to: StartButtonTitle.one.rawValue)
+        startButton.setTitle(to: "촬영시작")
     }
 }
 

PhotoGether/PresentationLayer/WaitingRoomFeature/WaitingRoomFeature/Source/ViewController/EnterLoadingViewController.swift

@@ -48,7 +48,6 @@ public final class EnterLoadingViewController: BaseViewController, ViewControlle
         label.snp.makeConstraints {
             $0.centerX.equalToSuperview()
             $0.top.equalTo(activityIndicator.snp.bottom).offset(10)
-            $0.horizontalEdges.equalToSuperview().inset(20)
         }
     }
 

PhotoGether/PresentationLayer/WaitingRoomFeature/WaitingRoomFeature/Source/ViewController/WaitingRoomViewController.swift

@@ -65,33 +65,25 @@ public final class WaitingRoomViewController: BaseViewController {
     private func bindOutput() {
         let output = viewModel.transform(input: input.eraseToAnyPublisher())
 
-        output.sink { [weak self] in
+        output
+            .receive(on: RunLoop.main)
+            .sink { [weak self] in
             guard let self else { return }
             switch $0 {
             // MARK: 네비게이션 처리
             case .navigateToPhotoRoom:
                 self.navigateToPhotoRoom()
 
-            // MARK: 내 비디오 화면 업데이트
-            case .localVideo(let localVideoView):
-                print(localVideoView)
-                updateParticipantView(view: localVideoView, position: .topLeading)
-                updateParticipantNickname(nickname: "나는 호스트야", position: .topLeading)
-
-            // MARK: 상대방 비디오 화면 업데이트
-            case .remoteVideos(let remoteVideoViews):
-                let guestVideoView1 = remoteVideoViews[safe: 0] ?? UIView()
-                let guestVideoView2 = remoteVideoViews[safe: 1] ?? UIView()
-                let guestVideoView3 = remoteVideoViews[safe: 2] ?? UIView()
-
-                updateParticipantView(view: guestVideoView1, position: .bottomTrailing)
-                updateParticipantView(view: guestVideoView2, position: .topTrailing)
-                updateParticipantView(view: guestVideoView3, position: .bottomLeading)
-
-                updateParticipantNickname(nickname: "나는 게스트1", position: .bottomTrailing)
-                updateParticipantNickname(nickname: "나는 게스트2", position: .topTrailing)
-                updateParticipantNickname(nickname: "나는 게스트3", position: .bottomLeading)
-
+            // MARK: 화면 업데이트
+            case let .shouldUpdateVideoView(videoView, viewPosition):
+                guard let participantPosition = ParticipantPosition(rawValue: viewPosition) else { return }
+                updateParticipantView(view: videoView, position: participantPosition)
+
+            // MARK: 닉네임 업데이트
+            case let .shouldUpdateNickname(nickname, viewPosition):
+                guard let participantPosition = ParticipantPosition(rawValue: viewPosition) else { return }
+                updateParticipantNickname(nickname: nickname, position: participantPosition)
+
             // MARK: 마이크 음소거 UI 업데이트
             case .micMuteState:
                 return