채팅 기능 및 UI 개선

Mogakco/Sources/Data/DataSources/Remote/ChatDataSource.swift

@@ -63,7 +63,6 @@ final class ChatDataSource: ChatDataSourceProtocol {
         return Observable.create { emitter in
             let query = Constant.chatRoom.document(chatRoomID).collection("chat")
             query.getDocuments(completion: { snapshot, _ in
-                if snapshot?.isEmpty == true { query.addDocument(data: [:]) }
                 self.listener = query.order(by: "date").limit(toLast: 1).addSnapshotListener({ snapshot, _ in
                     if let snapshot = snapshot,
                        let change = snapshot.documentChanges.last,

Mogakco/Sources/Presentation/Chat/View/ChatCell.swift

@@ -186,7 +186,7 @@ final class ChatCell: UICollectionViewCell, Identifiable {
         }
 
         timeLabel.snp.remakeConstraints {
-            $0.right.equalTo(bubbleContainer.snp.left).offset(-4)
+            $0.right.equalTo(bubbleContainer.snp.left).offset(-8)
             $0.bottom.equalTo(bubbleContainer)
         }
 

Mogakco/Sources/Presentation/Chat/ViewController/ChatViewController.swift

@@ -63,6 +63,7 @@ final class ChatViewController: UIViewController {
     private let viewModel: ChatViewModel
     private let selectedUser = PublishSubject<User>()
     private let chatMenuSelected = PublishSubject<ChatMenu>()
+    private var keyboardHeight = 0.0
 
     init(viewModel: ChatViewModel) {
         self.viewModel = viewModel
@@ -119,6 +120,7 @@ final class ChatViewController: UIViewController {
         let output = viewModel.transform(input: input)
         bindChatCollection(output: output)
         bindSideBar(output: output)
+        bindTextView()
         bindKeyboard()
     }
 
@@ -147,7 +149,6 @@ final class ChatViewController: UIViewController {
                     for: IndexPath(row: index, section: 0)) as? ChatCell else {
                     return UICollectionViewCell()
                 }
-
                 cell.layoutChat(chat: chat)
 
                 cell.profileImageButton.rx.tap
@@ -215,6 +216,35 @@ final class ChatViewController: UIViewController {
             .disposed(by: disposeBag)
     }
 
+    func bindTextView() {
+        messageInputView.messageInputTextView.rx
+            .didChange
+            .subscribe(onNext: { [weak self] in
+                guard let self else { return }
+                let size = CGSize(width: self.messageInputView.messageInputTextView.frame.width, height: .infinity)
+                let estimatedSize = self.messageInputView.messageInputTextView.sizeThatFits(size)
+                let isMaxHeight = estimatedSize.height >= Constant.messageInputViewHeight
+                if isMaxHeight == self.messageInputView.messageInputTextView.isScrollEnabled { return }
+                self.messageInputView.messageInputTextView.isScrollEnabled = isMaxHeight
+                 self.messageInputView.messageInputTextView.reloadInputViews()
+                print("DEBUG @@ : \(isMaxHeight)")
+                self.setNeedsUpdateConstraints(isScrollEnabled: isMaxHeight)
+            })
+            .disposed(by: disposeBag)
+    }
+
+    func setNeedsUpdateConstraints(isScrollEnabled: Bool) {
+        messageInputView.snp.remakeConstraints {
+            $0.left.right.equalTo(self.view.safeAreaLayoutGuide)
+            $0.bottom.equalToSuperview().inset(keyboardHeight)
+            if isScrollEnabled {
+                $0.top.lessThanOrEqualTo(self.view.snp.centerY)
+            } else {
+                $0.height.equalTo(Constant.messageInputViewHeight)
+            }
+        }
+    }
+
     func bindKeyboard() {
         RxKeyboard.instance.visibleHeight
             .skip(1)
@@ -303,6 +333,7 @@ final class ChatViewController: UIViewController {
         } else {
             UIView.animate(withDuration: 0.5) { [weak self] in
                 guard let self else { return }
+                self.keyboardHeight = height
                 self.collectionView.snp.remakeConstraints {
                     $0.top.left.right.equalToSuperview()
                     $0.bottom.equalTo(self.messageInputView.snp.top)

Mogakco/Sources/Presentation/Chat/ViewModel/ChatViewModel.swift

@@ -44,7 +44,6 @@ final class ChatViewModel: ViewModel {
         let alert: Signal<Alert>
     }
 
-    private var isFirst = true
     var chatRoomID: String = ""
     var chatUseCase: ChatUseCaseProtocol?
     var leaveStudyUseCase: LeaveStudyUseCaseProtocol?
@@ -141,10 +140,8 @@ final class ChatViewModel: ViewModel {
                 switch result {
                 case .success(let chat):
                     let chatID = try? newChats.value().last?.id
-                    if viewModel.isFirst == false && chat.id != chatID {
+                    if chat.id != chatID {
                         newChat.onNext(chat)
-                    } else {
-                        viewModel.isFirst = false
                     }
                 case .failure:
                     let alert = Alert(title: "메세지 로드 실패", message: "메세지 로드에 실패했어요! 다시 시도해주세요", observer: nil)
@@ -262,9 +259,7 @@ final class ChatViewModel: ViewModel {
         )
         .withUnretained(self)
         .flatMap { $0.0.unsubscribePushNotificationUseCase?.excute(topic: $0.0.chatRoomID) ?? .empty() }
-        .subscribe(onNext: { [weak self] _ in
-            self?.isFirst = true
-        })
+        .subscribe(onNext: { _ in })
         .disposed(by: disposeBag)
 
         // 채팅방 나갈 시 -> 푸쉬 알림 구독
@@ -275,8 +270,6 @@ final class ChatViewModel: ViewModel {
         .withUnretained(self)
         .flatMap { $0.0.subscribePushNotificationUseCase?.excute(topic: $0.0.chatRoomID) ?? .empty() }
         .subscribe(onNext: { [weak self] _ in
-            print("DEBUG : OBSERVE OUT")
-            self?.isFirst = true
             self?.chatUseCase?.stopObserving()
         })
         .disposed(by: disposeBag)