feat(creator): 팬Talk 쓰기 화면을 연결한다

SodaLive/Sources/V2/CreatorChannel/FanTalk/Write/CreatorChannelFanTalkWriteViewModel.swift

@@ -0,0 +1,130 @@
+import Foundation
+import Combine
+
+final class CreatorChannelFanTalkWriteViewModel: ObservableObject {
+    enum Mode {
+        case write
+        case modify(fanTalkId: Int, initialContent: String)
+
+        var initialContent: String {
+            if case .modify(_, let initialContent) = self {
+                return initialContent
+            }
+
+            return ""
+        }
+    }
+
+    private let repository = ExplorerRepository()
+    private var subscription = Set<AnyCancellable>()
+
+    let creatorId: Int
+    let mode: Mode
+
+    @Published var content: String
+    @Published var isLoading = false
+    @Published var errorMessage = ""
+    @Published var isShowPopup = false
+    @Published var shouldShowExitModal = false
+
+    let maxContentCount = 500
+
+    var canSend: Bool {
+        content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty == false
+    }
+
+    init(creatorId: Int, mode: Mode) {
+        self.creatorId = creatorId
+        self.mode = mode
+        content = mode.initialContent
+    }
+
+    func handleCancel() -> Bool {
+        guard canSend else { return true }
+
+        shouldShowExitModal = true
+        return false
+    }
+
+    func submit(onSuccess: @escaping () -> Void) {
+        guard canSend, isLoading == false else { return }
+
+        switch mode {
+        case .write:
+            writeCheers(onSuccess: onSuccess)
+        case .modify(let fanTalkId, _):
+            modifyCheers(fanTalkId: fanTalkId, onSuccess: onSuccess)
+        }
+    }
+
+    private func writeCheers(onSuccess: @escaping () -> Void) {
+        isLoading = true
+
+        repository.writeCheers(parentCheersId: nil, creatorId: creatorId, content: content)
+            .sink { [weak self] result in
+                guard let self else { return }
+
+                switch result {
+                case .finished:
+                    DEBUG_LOG("finish")
+                case .failure(let error):
+                    ERROR_LOG(error.localizedDescription)
+                    self.applyFailureState()
+                }
+            } receiveValue: { [weak self] response in
+                self?.handleMutationResponse(response.data, onSuccess: onSuccess)
+            }
+            .store(in: &subscription)
+    }
+
+    private func modifyCheers(fanTalkId: Int, onSuccess: @escaping () -> Void) {
+        guard fanTalkId > 0 else {
+            errorMessage = I18n.Common.commonError
+            isShowPopup = true
+            return
+        }
+
+        isLoading = true
+
+        repository.modifyCheers(cheersId: fanTalkId, content: content, isActive: nil)
+            .sink { [weak self] result in
+                guard let self else { return }
+
+                switch result {
+                case .finished:
+                    DEBUG_LOG("finish")
+                case .failure(let error):
+                    ERROR_LOG(error.localizedDescription)
+                    self.applyFailureState()
+                }
+            } receiveValue: { [weak self] response in
+                self?.handleMutationResponse(response.data, onSuccess: onSuccess)
+            }
+            .store(in: &subscription)
+    }
+
+    private func handleMutationResponse(_ data: Data, onSuccess: @escaping () -> Void) {
+        isLoading = false
+
+        do {
+            let decoded = try JSONDecoder().decode(ApiResponseWithoutData.self, from: data)
+
+            if decoded.success {
+                onSuccess()
+            } else {
+                errorMessage = decoded.message ?? I18n.Common.commonError
+                isShowPopup = true
+            }
+        } catch {
+            ERROR_LOG(error.localizedDescription)
+            errorMessage = I18n.Common.commonError
+            isShowPopup = true
+        }
+    }
+
+    private func applyFailureState() {
+        isLoading = false
+        errorMessage = I18n.Common.commonError
+        isShowPopup = true
+    }
+}