From 4d8a1f54afcc0f714c2719d9add3b18f5b5a9bc9 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Wed, 12 Nov 2025 17:39:25 +0900
Subject: [PATCH 01/17] =?UTF-8?q?refactor:=20DI=20=EC=A0=81=EC=9A=A9=20?=
 =?UTF-8?q?=EB=B0=8F=20Repository=20=ED=8C=A8=ED=84=B4=20=EB=8F=84?=
 =?UTF-8?q?=EC=9E=85?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존 ViewModel에서 직접 API 통신을 하던 구조를 Repository 패턴을 적용하여 개선했습니다. 의존성 주입(DI)을 위해 Application 클래스와 AppContainer를 도입하고, ViewModelProvider.Factory를 사용하여 ViewModel에 Repository를 주입하도록 변경했습니다.

*   **App, di, repository 패키지 추가**:
    *   `App.kt`: Application 클래스를 생성하여 DI 컨테이너(`AppContainer`)를 초기화합니다.
    *   `AppContainer.kt`: `PostRepository`의 인스턴스를 생성하고 관리합니다.
    *   `PostRepository.kt`, `PostRepositoryImpl.kt`: API 호출 로직을 ViewModel에서 분리하여 Repository 계층으로 이동했습니다.

*   **ViewModel 리팩토링**:
    *   `PostListViewModel.kt`: 게시글 목록 조회를 담당하는 ViewModel을 새로 생성하고, `StateFlow`를 사용하여 UI 상태(`PostListUiState`)를 관리합니다.
    *   `PostViewModel.kt`: 게시글 목록 조회(`getPosts`) 관련 로직을 `PostListViewModel`으로 이전했습니다.
    *   `postViewModelFactory.kt`: `PostRepository`를 ViewModel에 주입하기 위한 `ViewModelProvider.Factory`를 구현했습니다.

*   **UI 및 화면 로직 수정**:
    *   `PostListScreen.kt`: `PostListViewModel`과 `PostListUiState`를 사용하도록 변경하여, 로딩, 성공, 에러 상태에 따라 다른 UI를 표시하도록 구현했습니다.
    *   `NavGraph.kt`: `PostListScreen`에 `PostListViewModel`을 `viewModelFactory`를 통해 주입하도록 수정했습니다.

*   **기타 변경 사항**:
    *   `AndroidManifest.xml`: `Application` 클래스를 `App`으로 지정했습니다.
    *   `UriUtils.kt`: `ui.post.viewmodel` 패키지에서 `util` 패키지로 파일을 이동했습니다.
---
 app/src/main/AndroidManifest.xml              |  1 +
 .../java/com/example/kuit6_android_api/App.kt | 13 +++++
 .../kuit6_android_api/data/di/AppContainer.kt | 16 +++++++
 .../data/repository/PostRepository.kt         |  7 +++
 .../data/repository/PostRepositoryImpl.kt     | 22 +++++++++
 .../ui/navigation/NavGraph.kt                 |  6 ++-
 .../ui/post/screen/PostListScreen.kt          | 48 ++++++++++++-------
 .../ui/post/state/PostListUiState.kt          | 15 ++++++
 .../ui/post/viewmodel/PostListViewModel.kt    | 39 +++++++++++++++
 .../ui/post/viewmodel/PostViewModel.kt        | 21 +-------
 .../ui/post/viewmodel/PostViewModelFactory.kt | 22 +++++++++
 .../{ui/post/viewmodel => util}/UriUtils.kt   |  4 +-
 12 files changed, 173 insertions(+), 41 deletions(-)
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/App.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/state/PostListUiState.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
 rename app/src/main/java/com/example/kuit6_android_api/{ui/post/viewmodel => util}/UriUtils.kt (95%)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 0f991aa..958f28b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -14,6 +14,7 @@
         android:maxSdkVersion="32" />
 
     <application
+        android:name=".App"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
diff --git a/app/src/main/java/com/example/kuit6_android_api/App.kt b/app/src/main/java/com/example/kuit6_android_api/App.kt
new file mode 100644
index 0000000..917cb42
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/App.kt
@@ -0,0 +1,13 @@
+package com.example.kuit6_android_api
+
+import android.app.Application
+import com.example.kuit6_android_api.data.di.AppContainer
+
+class App: Application() {
+    lateinit var container: AppContainer
+
+    override fun onCreate(){
+        super.onCreate()
+        container = AppContainer()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
new file mode 100644
index 0000000..cf4ecc4
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
@@ -0,0 +1,16 @@
+package com.example.kuit6_android_api.data.di
+
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.api.RetrofitClient
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.repository.PostRepositoryImpl
+
+class AppContainer {
+    private val apiService: ApiService by lazy{
+        RetrofitClient.apiService
+    }
+
+    val postRepository: PostRepository by lazy{
+        PostRepositoryImpl(apiService)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
new file mode 100644
index 0000000..cf7a9a5
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
@@ -0,0 +1,7 @@
+package com.example.kuit6_android_api.data.repository
+
+import com.example.kuit6_android_api.data.model.response.PostResponse
+
+interface PostRepository{
+    suspend fun getPosts(): Result<List<PostResponse>>
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
new file mode 100644
index 0000000..b7f1676
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
@@ -0,0 +1,22 @@
+package com.example.kuit6_android_api.data.repository
+
+import android.util.Log
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.model.response.PostResponse
+
+class PostRepositoryImpl (
+    private val apiService: ApiService
+): PostRepository {
+    override suspend fun getPosts(): Result<List<PostResponse>> {
+        return runCatching{
+            val response = apiService.getPosts()
+            if(response.success && response.data!=null){
+                response.data
+            }else{
+                throw Exception(response.message ?: "게시긆 불러오기 실패")
+            }
+        }.onFailure{error->
+            Log.e("PostRepository",error.message.toString())
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt b/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
index 975565e..bbd692b 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
@@ -2,6 +2,7 @@ package com.example.kuit6_android_api.ui.navigation
 
 import androidx.compose.material3.SnackbarHostState
 import androidx.compose.runtime.Composable
+import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
@@ -10,6 +11,8 @@ import com.example.kuit6_android_api.ui.post.screen.PostCreateScreen
 import com.example.kuit6_android_api.ui.post.screen.PostDetailScreen
 import com.example.kuit6_android_api.ui.post.screen.PostEditScreen
 import com.example.kuit6_android_api.ui.post.screen.PostListScreen
+import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 
 @Composable
 fun NavGraph(
@@ -28,7 +31,8 @@ fun NavGraph(
                 },
                 onCreatePostClick = {
                     navController.navigate(PostCreateRoute)
-                }
+                },
+                viewModel = viewModel(factory = postViewModelFactory { PostListViewModel(it) })
             )
         }
 
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 8522d79..ec9f704 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -9,6 +9,7 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
@@ -18,10 +19,14 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.kuit6_android_api.ui.post.component.PostItem
+import com.example.kuit6_android_api.ui.post.state.PostListUiState
+import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
 import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -29,13 +34,10 @@ import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostViewModel = viewModel()
+    viewModel: PostListViewModel
 ) {
-    val posts = viewModel.posts
+    val uiState by viewModel.uiState.collectAsState()
 
-    LaunchedEffect(Unit) {
-        viewModel.getPosts()
-    }
 
     Scaffold(
         topBar = {
@@ -49,19 +51,29 @@ fun PostListScreen(
             }
         }
     ) { paddingValues ->
-        LazyColumn(
-            modifier = Modifier
-                .fillMaxSize()
-                .padding(paddingValues)
-                .background(MaterialTheme.colorScheme.background),
-            contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
-            verticalArrangement = Arrangement.spacedBy(16.dp)
-        ) {
-            items(posts) { post ->
-                PostItem(
-                    post = post,
-                    onClick = { onPostClick(post.id) }
-                )
+        when(uiState){
+            is PostListUiState.Loading->{
+                CircularProgressIndicator()
+            }
+            is PostListUiState.Success-> {
+                LazyColumn(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(paddingValues)
+                        .background(MaterialTheme.colorScheme.background),
+                    contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
+                    verticalArrangement = Arrangement.spacedBy(16.dp)
+                ) {
+                    items((uiState as PostListUiState.Success).posts) { post ->
+                        PostItem(
+                            post = post,
+                            onClick = { onPostClick(post.id) }
+                        )
+                    }
+                }
+            }
+            is PostListUiState.Error->{
+
             }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/state/PostListUiState.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/state/PostListUiState.kt
new file mode 100644
index 0000000..f27b93f
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/state/PostListUiState.kt
@@ -0,0 +1,15 @@
+package com.example.kuit6_android_api.ui.post.state
+
+import com.example.kuit6_android_api.data.model.response.PostResponse
+
+sealed class PostListUiState {
+    data object Loading: PostListUiState()
+
+    data class Success(
+        val posts: List<PostResponse>
+    ):PostListUiState()
+
+    data class Error(
+        val message: String
+    ): PostListUiState()
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
new file mode 100644
index 0000000..9e1cb77
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
@@ -0,0 +1,39 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.ui.post.state.PostListUiState
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+class PostListViewModel(
+    private val postRepository: PostRepository
+) : ViewModel() {
+    private val _uiState = MutableStateFlow<PostListUiState>(PostListUiState.Loading)
+    val uiState: StateFlow<PostListUiState> = _uiState.asStateFlow()
+
+    init {
+        loadPosts()
+    }
+
+    private fun loadPosts() {
+        viewModelScope.launch {
+            _uiState.value = PostListUiState.Loading
+            postRepository.getPosts()
+                .onSuccess { posts ->
+                    _uiState.value = PostListUiState.Success(posts)
+                }
+                .onFailure {error->
+                    _uiState.value = PostListUiState.Error(
+                        message = error.message?:"error"
+                    )
+                }
+        }
+    }
+    fun refresh(){
+        loadPosts()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
index d42740f..38b407f 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
@@ -2,7 +2,6 @@ package com.example.kuit6_android_api.ui.post.viewmodel
 
 import android.content.Context
 import android.net.Uri
-import android.util.Log
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
@@ -11,15 +10,13 @@ import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.api.RetrofitClient
 import com.example.kuit6_android_api.data.model.request.PostCreateRequest
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import com.example.kuit6_android_api.util.UriUtils
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
 class PostViewModel : ViewModel() {
-    var posts by mutableStateOf<List<PostResponse>>(emptyList())
-        private set
-
     var postDetail by mutableStateOf<PostResponse?>(null)
         private set
 
@@ -31,22 +28,6 @@ class PostViewModel : ViewModel() {
 
     private val apiService = RetrofitClient.apiService
 
-    fun getPosts() {
-        viewModelScope.launch {
-            runCatching {
-                apiService.getPosts()
-            }.onSuccess { response ->
-                response.data?.let {
-                    if (response.success) {
-                        posts = response.data
-                    }
-                }
-            }.onFailure { error ->
-                Log.e("getPost", error.message.toString())
-            }
-        }
-    }
-
     fun getPostDetail(postId: Long) {
         viewModelScope.launch {
             runCatching {
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
new file mode 100644
index 0000000..6dcdcfc
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
@@ -0,0 +1,22 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import com.example.kuit6_android_api.App
+import com.example.kuit6_android_api.data.repository.PostRepository
+
+
+inline fun <reified VM : ViewModel> postViewModelFactory(
+    crossinline create: (PostRepository) -> VM
+): ViewModelProvider.Factory = viewModelFactory {
+    initializer {
+        val application = this[ViewModelProvider.AndroidViewModelFactory.APPLICATION_KEY]
+                as App
+
+        val postRepository = application.container.postRepository
+
+        create(postRepository)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/UriUtils.kt b/app/src/main/java/com/example/kuit6_android_api/util/UriUtils.kt
similarity index 95%
rename from app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/UriUtils.kt
rename to app/src/main/java/com/example/kuit6_android_api/util/UriUtils.kt
index 3271431..4418e1a 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/UriUtils.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/util/UriUtils.kt
@@ -1,4 +1,4 @@
-package com.example.kuit6_android_api.ui.post.viewmodel
+package com.example.kuit6_android_api.util
 
 import android.content.Context
 import android.net.Uri
@@ -38,4 +38,4 @@ object UriUtils {
         }
         return fileName
     }
-}
+}
\ No newline at end of file

From fb67908fb1840437520100b4d8e221afa2b9e9d4 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Wed, 12 Nov 2025 18:33:31 +0900
Subject: [PATCH 02/17] =?UTF-8?q?refactor:=20ViewModel=20=EB=B6=84?=
 =?UTF-8?q?=EB=A6=AC=20=EB=B0=8F=20Repository=20=ED=8C=A8=ED=84=B4=20?=
 =?UTF-8?q?=EC=A0=81=EC=9A=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존의 단일 `PostViewModel`을 `PostCreateViewModel`, `PostDetailViewModel`, `PostEditViewModel`로 분리하여 각 화면의 역할을 명확히 했습니다. 또한, `PostRepository`를 도입하여 데이터 소스를 추상화하고 ViewModel과 데이터 계층 간의 의존성을 분리했습니다.

*   **Repository 추가**:
    *   `PostRepository`: `ApiService`를 사용하여 게시글 CRUD 및 이미지 업로드 API를 호출하는 로직을 캡슐화했습니다.

*   **ViewModel 분리**:
    *   `PostCreateViewModel`: 게시글 생성 및 이미지 업로드 기능을 담당합니다.
    *   `PostDetailViewModel`: 게시글 상세 조회 및 삭제 기능을 담당합니다.
    *   `PostEditViewModel`: 게시글 수정, 상세 조회 및 이미지 업로드 기능을 담당합니다.

*   **의존성 주입(DI)**:
    *   `AppContainer`: `PostRepository`의 인스턴스를 생성하고 관리하여 ViewModel에 주입하는 역할을 합니다.
    *   각 Screen(`PostCreateScreen`, `PostDetailScreen`, `PostEditScreen`)에서는 `AppContainer`를 통해 해당 화면에 맞는 ViewModel을 주입받도록 수정했습니다.
---
 .../data/repository/PostRepository.kt         | 93 ++++++++++++++++++-
 .../kuit6_android_api/di/AppContainer.kt      | 13 +++
 .../ui/post/screen/PostCreateScreen.kt        | 10 +-
 .../ui/post/screen/PostDetailScreen.kt        | 12 ++-
 .../ui/post/screen/PostEditScreen.kt          | 10 +-
 .../ui/post/viewmodel/PostCreateViewModel.kt  | 74 +++++++++++++++
 .../ui/post/viewmodel/PostDetailViewModel.kt  | 39 ++++++++
 .../ui/post/viewmodel/PostEditViewModel.kt    | 90 ++++++++++++++++++
 8 files changed, 331 insertions(+), 10 deletions(-)
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt

diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
index cf7a9a5..bd9e2ae 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
@@ -1,7 +1,94 @@
 package com.example.kuit6_android_api.data.repository
 
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.model.request.PostCreateRequest
+import com.example.kuit6_android_api.data.model.response.BaseResponse
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import okhttp3.MultipartBody
 
-interface PostRepository{
-    suspend fun getPosts(): Result<List<PostResponse>>
-}
\ No newline at end of file
+class PostRepository(
+    private val apiService: ApiService
+) {
+    suspend fun getPosts(): Result<List<PostResponse>> {
+        return runCatching {
+            val response: BaseResponse<List<PostResponse>> = apiService.getPosts()
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 목록 조회 실패")
+            }
+        }
+    }
+
+    suspend fun getPostDetail(postId: Long): Result<PostResponse> {
+        return runCatching {
+            val response: BaseResponse<PostResponse> = apiService.getPostDetail(postId)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 상세 조회 실패")
+            }
+        }
+    }
+
+    suspend fun createPost(
+        author: String,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.createPost(author, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 생성 실패")
+            }
+        }
+    }
+
+    suspend fun updatePost(
+        postId: Long,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.updatePost(postId, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 수정 실패")
+            }
+        }
+    }
+
+    suspend fun deletePost(postId: Long): Result<Unit> {
+        return runCatching {
+            val response: BaseResponse<Unit> = apiService.deletePost(postId)
+            if (response.success) {
+                Unit
+            } else {
+                throw Exception(response.message ?: "게시글 삭제 실패")
+            }
+        }
+    }
+
+    suspend fun uploadImage(file: MultipartBody.Part): Result<String> {
+        return runCatching {
+            val response: BaseResponse<Map<String, String>> = apiService.uploadImage(file)
+            if (response.success && response.data != null) {
+                val imageUrl = response.data["imageUrl"]
+                if (imageUrl != null) {
+                    imageUrl
+                } else {
+                    throw Exception("이미지 URL을 받아오지 못했습니다")
+                }
+            } else {
+                throw Exception(response.message ?: "이미지 업로드 실패")
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
new file mode 100644
index 0000000..55cc30b
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
@@ -0,0 +1,13 @@
+package com.example.kuit6_android_api.di
+
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.api.RetrofitClient
+import com.example.kuit6_android_api.data.repository.PostRepository
+
+class AppContainer {
+    //모든 의존성을 AppContainer 한 곳에서 관리하게 함
+    val apiService: ApiService = RetrofitClient.apiService
+    //ApiService를 AppContainer에서 한 번만 가져 와 Repository에 주입
+    // 원래 ApiService를 직접 참조하던 ViewModel들이 Repository를 참조
+    val postRepository: PostRepository = PostRepository(apiService)
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 58cee96..a883ad1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -53,7 +53,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostCreateViewModel
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -61,7 +62,12 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostCreateViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostCreateViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index eb617c1..b62e88a 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -46,7 +46,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostDetailViewModel
 import com.example.kuit6_android_api.util.formatDateTime
 import kotlinx.coroutines.launch
 
@@ -56,7 +57,12 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostDetailViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostDetailViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val post = viewModel.postDetail
@@ -64,7 +70,7 @@ fun PostDetailScreen(
     val scope = rememberCoroutineScope()
 
     LaunchedEffect(postId) {
-//        viewModel.getPostDetail(postId)
+        viewModel.getPostDetail(postId)
     }
 
     Scaffold(
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 5f8283e..df642f5 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -52,7 +52,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostEditViewModel
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -61,7 +62,12 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostEditViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostEditViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
new file mode 100644
index 0000000..6a05b1f
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -0,0 +1,74 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import android.content.Context
+import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import kotlinx.coroutines.launch
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+
+class PostCreateViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var uploadedImageUrl by mutableStateOf<String?>(null)
+        private set
+
+    var isUploading by mutableStateOf(false)
+        private set
+
+    fun createPost(
+        author: String,
+        title: String,
+        content: String,
+        imageUrl: String? = null,
+        onSuccess: () -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            repository.createPost(author, title, content, imageUrl)
+                .onSuccess {
+                    clearUploadedImageUrl()
+                    onSuccess()
+                }
+        }
+    }
+
+    fun clearUploadedImageUrl() {
+        uploadedImageUrl = null
+    }
+
+    fun uploadImage(
+        context: Context,
+        uri: Uri,
+        onSuccess: (String) -> Unit = {},
+        onError: (String) -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            isUploading = true
+            runCatching {
+                val file = UriUtils.uriToFile(context, uri)
+                if (file == null) {
+                    throw Exception("파일 변환 실패")
+                }
+
+                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+                repository.uploadImage(body)
+            }.onSuccess { imageUrl ->
+                isUploading = false
+                uploadedImageUrl = imageUrl
+                onSuccess(imageUrl)
+            }.onFailure { error ->
+                isUploading = false
+                onError(error.message ?: "업로드 실패")
+            }
+        }
+    }
+}
+
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
new file mode 100644
index 0000000..ae8e59d
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
@@ -0,0 +1,39 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.model.response.PostResponse
+import kotlinx.coroutines.launch
+
+class PostDetailViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var postDetail by mutableStateOf<PostResponse?>(null)
+        private set
+
+    fun getPostDetail(postId: Long) {
+        viewModelScope.launch {
+            repository.getPostDetail(postId)
+                .onSuccess { post ->
+                    postDetail = post
+                }
+                .onFailure {
+                    postDetail = null
+                }
+        }
+    }
+
+    fun deletePost(postId: Long, onSuccess: () -> Unit = {}) {
+        viewModelScope.launch {
+            repository.deletePost(postId)
+                .onSuccess {
+                    onSuccess()
+                }
+        }
+    }
+}
+
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
new file mode 100644
index 0000000..0d3e6a5
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -0,0 +1,90 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import android.content.Context
+import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.model.response.PostResponse
+import kotlinx.coroutines.launch
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+
+class PostEditViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var postDetail by mutableStateOf<PostResponse?>(null)
+        private set
+
+    var uploadedImageUrl by mutableStateOf<String?>(null)
+        private set
+
+    var isUploading by mutableStateOf(false)
+        private set
+
+    fun getPostDetail(postId: Long) {
+        viewModelScope.launch {
+            repository.getPostDetail(postId)
+                .onSuccess { post ->
+                    postDetail = post
+                }
+                .onFailure {
+                    postDetail = null
+                }
+        }
+    }
+
+    fun updatePost(
+        postId: Long,
+        title: String,
+        content: String,
+        imageUrl: String? = null,
+        onSuccess: () -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            repository.updatePost(postId, title, content, imageUrl)
+                .onSuccess {
+                    clearUploadedImageUrl()
+                    onSuccess()
+                }
+        }
+    }
+
+    fun clearUploadedImageUrl() {
+        uploadedImageUrl = null
+    }
+
+    fun uploadImage(
+        context: Context,
+        uri: Uri,
+        onSuccess: (String) -> Unit = {},
+        onError: (String) -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            isUploading = true
+            runCatching {
+                val file = UriUtils.uriToFile(context, uri)
+                if (file == null) {
+                    throw Exception("파일 변환 실패")
+                }
+
+                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+                repository.uploadImage(body)
+            }.onSuccess { imageUrl ->
+                isUploading = false
+                uploadedImageUrl = imageUrl
+                onSuccess(imageUrl)
+            }.onFailure { error ->
+                isUploading = false
+                onError(error.message ?: "업로드 실패")
+            }
+        }
+    }
+}
+

From b801059dfaca57fa96997c7efb6cee2e8dd988b8 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 12:20:10 +0900
Subject: [PATCH 03/17] =?UTF-8?q?refactor:=20ViewModel=20=EB=B6=84?=
 =?UTF-8?q?=EB=A6=AC=20=EB=B0=8F=20UI=20=EC=83=81=ED=83=9C=20=EA=B4=80?=
 =?UTF-8?q?=EB=A6=AC=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존의 단일 `PostViewModel`을 `PostListViewModel`으로 이름을 변경하고 목록 조회 기능만 남도록 역할을 축소했습니다. 또한, 각 ViewModel에서 개별적으로 관리하던 상태 변수들을 `PostListUiState`, `PostCreateUiState`, `PostDetailUiState`, `PostEditUiState`와 같은 데이터 클래스로 통합하여 상태 관리를 개선했습니다.

*   **ViewModel 분리 및 리팩토링**:
    *   `PostViewModel.kt`: 기존의 다기능 ViewModel을 삭제했습니다.
    *   `PostListViewModel.kt`: 게시글 목록 조회를 담당하는 ViewModel을 새로 생성하고, `PostListUiState`를 사용하여 UI 상태를 관리합니다. `getPosts()` 메서드는 `refresh()`로 이름을 변경했습니다.
    *   `PostCreateViewModel`, `PostDetailViewModel`, `PostEditViewModel`: 각 ViewModel의 상태 변수들(`uploadedImageUrl`, `isUploading`, `postDetail` 등)을 `UiState` 데이터 클래스로 캡슐화하여 관리하도록 수정했습니다.

*   **UI 및 화면 로직 수정**:
    *   `PostListScreen.kt`: `PostListViewModel`과 `PostListUiState`를 사용하도록 변경했습니다.
    *   `PostCreateScreen.kt`, `PostDetailScreen.kt`, `PostEditScreen.kt`: 각 화면에서 ViewModel의 `UiState`를 참조하여 UI를 렌더링하도록 수정했습니다.
---
 .../ui/post/screen/PostCreateScreen.kt        |  11 +-
 .../ui/post/screen/PostDetailScreen.kt        |   3 +-
 .../ui/post/screen/PostEditScreen.kt          |   9 +-
 .../ui/post/screen/PostListScreen.kt          |  53 ++++---
 .../ui/post/viewmodel/PostCreateViewModel.kt  |  25 ++--
 .../ui/post/viewmodel/PostDetailViewModel.kt  |  10 +-
 .../ui/post/viewmodel/PostEditViewModel.kt    |  32 ++--
 .../ui/post/viewmodel/PostListViewModel.kt    |  40 +++--
 .../ui/post/viewmodel/PostViewModel.kt        | 141 ------------------
 9 files changed, 94 insertions(+), 230 deletions(-)
 delete mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index a883ad1..0449fe6 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -71,6 +71,7 @@ fun PostCreateScreen(
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
+    val uiState = viewModel.uiState
     var author by remember { mutableStateOf("") }
     var title by remember { mutableStateOf("") }
     var content by remember { mutableStateOf("") }
@@ -204,7 +205,7 @@ fun PostCreateScreen(
                             color = MaterialTheme.colorScheme.onSurface
                         )
 
-                        if (selectedImageUri == null && !viewModel.isUploading) {
+                        if (selectedImageUri == null && !uiState.isUploading) {
                             FilledTonalButton(
                                 onClick = { imagePickerLauncher.launch("image/*") },
                                 shape = RoundedCornerShape(10.dp)
@@ -215,7 +216,7 @@ fun PostCreateScreen(
                     }
 
                     // 업로드 중 표시
-                    if (viewModel.isUploading) {
+                    if (uiState.isUploading) {
                         Spacer(modifier = Modifier.height(12.dp))
                         Row(
                             verticalAlignment = Alignment.CenterVertically,
@@ -236,7 +237,7 @@ fun PostCreateScreen(
                     }
 
                     // 업로드된 이미지 미리보기
-                    if (selectedImageUri != null && !viewModel.isUploading) {
+                    if (selectedImageUri != null && !uiState.isUploading) {
                         Spacer(modifier = Modifier.height(12.dp))
                         Box(
                             modifier = Modifier.fillMaxWidth()
@@ -276,7 +277,7 @@ fun PostCreateScreen(
             Button(
                 onClick = {
                     val finalAuthor = author
-                    viewModel.createPost(finalAuthor, title, content, viewModel.uploadedImageUrl) {
+                    viewModel.createPost(finalAuthor, title, content, uiState.uploadedImageUrl) {
                         onPostCreated()
                         scope.launch { snackBarState.showSnackbar("게시글이 작성되었습니다.") }
                     }
@@ -284,7 +285,7 @@ fun PostCreateScreen(
                 modifier = Modifier
                     .fillMaxWidth()
                     .height(56.dp),
-                enabled = title.isNotBlank() && content.isNotBlank() && !viewModel.isUploading,
+                enabled = title.isNotBlank() && content.isNotBlank() && !uiState.isUploading,
                 shape = RoundedCornerShape(16.dp),
                 elevation = ButtonDefaults.buttonElevation(
                     defaultElevation = 4.dp,
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index b62e88a..3b377bc 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -65,7 +65,8 @@ fun PostDetailScreen(
     ),
     snackBarState: SnackbarHostState
 ) {
-    val post = viewModel.postDetail
+    val uiState = viewModel.uiState
+    val post = uiState.postDetail
     var showDeleteDialog by remember { mutableStateOf(false) }
     val scope = rememberCoroutineScope()
 
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index df642f5..552e8a5 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -71,7 +71,8 @@ fun PostEditScreen(
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
-    val post = viewModel.postDetail
+    val uiState = viewModel.uiState
+    val post = uiState.postDetail
     val scope = rememberCoroutineScope()
 
     var title by remember { mutableStateOf("") }
@@ -237,7 +238,7 @@ fun PostEditScreen(
                 Button(
                     onClick = {
                         val imageUrl = if (selectedImageUri != null) {
-                            viewModel.uploadedImageUrl
+                            uiState.uploadedImageUrl
                         } else {
                             post?.imageUrl
                         }
@@ -251,14 +252,14 @@ fun PostEditScreen(
                     modifier = Modifier
                         .fillMaxWidth()
                         .height(56.dp),
-                    enabled = title.isNotBlank() && content.isNotBlank() && !viewModel.isUploading,
+                    enabled = title.isNotBlank() && content.isNotBlank() && !uiState.isUploading,
                     shape = RoundedCornerShape(12.dp),
                     colors = ButtonDefaults.buttonColors(
                         containerColor = MaterialTheme.colorScheme.primary,
                         disabledContainerColor = MaterialTheme.colorScheme.surfaceVariant
                     )
                 ) {
-                    if (viewModel.isUploading) {
+                    if (uiState.isUploading) {
                         Row(
                             horizontalArrangement = Arrangement.Center,
                             verticalAlignment = Alignment.CenterVertically
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index ec9f704..866b3aa 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -19,25 +19,32 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.component.PostItem
-import com.example.kuit6_android_api.ui.post.state.PostListUiState
 import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostListViewModel
+    viewModel: PostListViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostListViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    )
 ) {
-    val uiState by viewModel.uiState.collectAsState()
+    val uiState = viewModel.uiState
+    val posts = uiState.posts
 
+    LaunchedEffect(Unit) {
+        viewModel.refresh()
+    }
 
     Scaffold(
         topBar = {
@@ -51,29 +58,19 @@ fun PostListScreen(
             }
         }
     ) { paddingValues ->
-        when(uiState){
-            is PostListUiState.Loading->{
-                CircularProgressIndicator()
-            }
-            is PostListUiState.Success-> {
-                LazyColumn(
-                    modifier = Modifier
-                        .fillMaxSize()
-                        .padding(paddingValues)
-                        .background(MaterialTheme.colorScheme.background),
-                    contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
-                    verticalArrangement = Arrangement.spacedBy(16.dp)
-                ) {
-                    items((uiState as PostListUiState.Success).posts) { post ->
-                        PostItem(
-                            post = post,
-                            onClick = { onPostClick(post.id) }
-                        )
-                    }
-                }
-            }
-            is PostListUiState.Error->{
-
+        LazyColumn(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+                .background(MaterialTheme.colorScheme.background),
+            contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            items(posts) { post ->
+                PostItem(
+                    post = post,
+                    onClick = { onPostClick(post.id) }
+                )
             }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index 6a05b1f..26f4da8 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -13,13 +13,16 @@ import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+//uiState를 통해 상태를 한 번에 모아 처리
+data class PostCreateUiState(
+    val uploadedImageUrl: String? = null,
+    val isUploading: Boolean = false
+)
+
 class PostCreateViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
+    var uiState by mutableStateOf(PostCreateUiState())
         private set
 
     fun createPost(
@@ -32,14 +35,14 @@ class PostCreateViewModel(
         viewModelScope.launch {
             repository.createPost(author, title, content, imageUrl)
                 .onSuccess {
-                    clearUploadedImageUrl()
+                    uiState = uiState.copy(uploadedImageUrl = null)
                     onSuccess()
                 }
         }
     }
 
     fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
+        uiState = uiState.copy(uploadedImageUrl = null)
     }
 
     fun uploadImage(
@@ -49,7 +52,7 @@ class PostCreateViewModel(
         onError: (String) -> Unit = {}
     ) {
         viewModelScope.launch {
-            isUploading = true
+            uiState = uiState.copy(isUploading = true)
             runCatching {
                 val file = UriUtils.uriToFile(context, uri)
                 if (file == null) {
@@ -61,11 +64,13 @@ class PostCreateViewModel(
 
                 repository.uploadImage(body)
             }.onSuccess { imageUrl ->
-                isUploading = false
-                uploadedImageUrl = imageUrl
+                uiState = uiState.copy(
+                    isUploading = false,
+                    uploadedImageUrl = imageUrl
+                )
                 onSuccess(imageUrl)
             }.onFailure { error ->
-                isUploading = false
+                uiState = uiState.copy(isUploading = false)
                 onError(error.message ?: "업로드 실패")
             }
         }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
index ae8e59d..6544df0 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
@@ -9,20 +9,24 @@ import com.example.kuit6_android_api.data.repository.PostRepository
 import com.example.kuit6_android_api.data.model.response.PostResponse
 import kotlinx.coroutines.launch
 
+data class PostDetailUiState(
+    val postDetail: PostResponse? = null
+)
+
 class PostDetailViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
+    var uiState by mutableStateOf(PostDetailUiState())
         private set
 
     fun getPostDetail(postId: Long) {
         viewModelScope.launch {
             repository.getPostDetail(postId)
                 .onSuccess { post ->
-                    postDetail = post
+                    uiState = uiState.copy(postDetail = post)
                 }
                 .onFailure {
-                    postDetail = null
+                    uiState = uiState.copy(postDetail = null)
                 }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
index 0d3e6a5..21e5124 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -14,26 +14,26 @@ import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+data class PostEditUiState(
+    val postDetail: PostResponse? = null,
+    val uploadedImageUrl: String? = null,
+    val isUploading: Boolean = false
+)
+
 class PostEditViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
-        private set
-
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
+    var uiState by mutableStateOf(PostEditUiState())
         private set
 
     fun getPostDetail(postId: Long) {
         viewModelScope.launch {
             repository.getPostDetail(postId)
                 .onSuccess { post ->
-                    postDetail = post
+                    uiState = uiState.copy(postDetail = post)
                 }
                 .onFailure {
-                    postDetail = null
+                    uiState = uiState.copy(postDetail = null)
                 }
         }
     }
@@ -48,14 +48,14 @@ class PostEditViewModel(
         viewModelScope.launch {
             repository.updatePost(postId, title, content, imageUrl)
                 .onSuccess {
-                    clearUploadedImageUrl()
+                    uiState = uiState.copy(uploadedImageUrl = null)
                     onSuccess()
                 }
         }
     }
 
     fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
+        uiState = uiState.copy(uploadedImageUrl = null)
     }
 
     fun uploadImage(
@@ -65,7 +65,7 @@ class PostEditViewModel(
         onError: (String) -> Unit = {}
     ) {
         viewModelScope.launch {
-            isUploading = true
+            uiState = uiState.copy(isUploading = true)
             runCatching {
                 val file = UriUtils.uriToFile(context, uri)
                 if (file == null) {
@@ -77,11 +77,13 @@ class PostEditViewModel(
 
                 repository.uploadImage(body)
             }.onSuccess { imageUrl ->
-                isUploading = false
-                uploadedImageUrl = imageUrl
+                uiState = uiState.copy(
+                    isUploading = false,
+                    uploadedImageUrl = imageUrl
+                )
                 onSuccess(imageUrl)
             }.onFailure { error ->
-                isUploading = false
+                uiState = uiState.copy(isUploading = false)
                 onError(error.message ?: "업로드 실패")
             }
         }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
index 9e1cb77..7040496 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
@@ -1,39 +1,33 @@
 package com.example.kuit6_android_api.ui.post.viewmodel
 
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
-import com.example.kuit6_android_api.ui.post.state.PostListUiState
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.asStateFlow
+import com.example.kuit6_android_api.data.model.response.PostResponse
 import kotlinx.coroutines.launch
 
+data class PostListUiState(
+    val posts: List<PostResponse> = emptyList()
+)
+
 class PostListViewModel(
-    private val postRepository: PostRepository
+    private val repository: PostRepository
 ) : ViewModel() {
-    private val _uiState = MutableStateFlow<PostListUiState>(PostListUiState.Loading)
-    val uiState: StateFlow<PostListUiState> = _uiState.asStateFlow()
-
-    init {
-        loadPosts()
-    }
+    var uiState by mutableStateOf(PostListUiState())
+        private set
 
-    private fun loadPosts() {
+    fun refresh() {
         viewModelScope.launch {
-            _uiState.value = PostListUiState.Loading
-            postRepository.getPosts()
+            repository.getPosts()
                 .onSuccess { posts ->
-                    _uiState.value = PostListUiState.Success(posts)
+                    uiState = uiState.copy(posts = posts)
                 }
-                .onFailure {error->
-                    _uiState.value = PostListUiState.Error(
-                        message = error.message?:"error"
-                    )
+                .onFailure {
+                    uiState = uiState.copy(posts = emptyList())
                 }
         }
     }
-    fun refresh(){
-        loadPosts()
-    }
-}
\ No newline at end of file
+}
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
deleted file mode 100644
index 38b407f..0000000
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
+++ /dev/null
@@ -1,141 +0,0 @@
-package com.example.kuit6_android_api.ui.post.viewmodel
-
-import android.content.Context
-import android.net.Uri
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import com.example.kuit6_android_api.data.api.RetrofitClient
-import com.example.kuit6_android_api.data.model.request.PostCreateRequest
-import com.example.kuit6_android_api.data.model.response.PostResponse
-import com.example.kuit6_android_api.util.UriUtils
-import kotlinx.coroutines.launch
-import okhttp3.MediaType.Companion.toMediaTypeOrNull
-import okhttp3.MultipartBody
-import okhttp3.RequestBody.Companion.asRequestBody
-
-class PostViewModel : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
-        private set
-
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
-        private set
-
-    private val apiService = RetrofitClient.apiService
-
-    fun getPostDetail(postId: Long) {
-        viewModelScope.launch {
-            runCatching {
-                apiService.getPostDetail(postId)
-            }.onSuccess { response ->
-                if (response.success && response.data != null) {
-                    postDetail = response.data
-                }
-            }.onFailure { error ->
-                // 에러 처리
-                postDetail = null
-            }
-        }
-    }
-
-    fun createPost(
-        author: String,
-        title: String,
-        content: String,
-        imageUrl: String? = null,
-        onSuccess: () -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            runCatching {
-                val request = PostCreateRequest(title, content, imageUrl)
-                apiService.createPost(author, request)
-            }.onSuccess { response ->
-                if (response.success) {
-                    // 이미지 업로드 관련 코드
-                    clearUploadedImageUrl()
-                    onSuccess()
-                }
-            }
-        }
-    }
-
-    fun updatePost(
-        postId: Long,
-        title: String,
-        content: String,
-        imageUrl: String? = null,
-        onSuccess: () -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            runCatching {
-                val request = PostCreateRequest(title, content, imageUrl)
-                apiService.updatePost(postId, request)
-            }.onSuccess { response ->
-                if (response.success) {
-                    clearUploadedImageUrl()
-                    onSuccess()
-                }
-            }.onFailure { error ->
-                // 에러 처리
-            }
-        }
-    }
-
-    fun deletePost(postId: Long, onSuccess: () -> Unit = {}) {
-        viewModelScope.launch {
-            runCatching {
-                apiService.deletePost(postId)
-            }.onSuccess { response ->
-                if (response.success) {
-                    onSuccess()
-                }
-            }.onFailure { error ->
-
-            }
-        }
-    }
-
-    fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
-    }
-
-    // 이미지 업로드 함수
-    fun uploadImage(
-        context: Context,
-        uri: Uri,
-        onSuccess: (String) -> Unit = {},
-        onError: (String) -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            isUploading = true
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                apiService.uploadImage(body)
-            }.onSuccess { response ->
-                isUploading = false
-                if (response.success && response.data != null) {
-                    val imageUrl = response.data["imageUrl"]
-                    if (imageUrl != null) {
-                        uploadedImageUrl = imageUrl
-                        onSuccess(imageUrl)
-                    }
-                }
-            }.onFailure { error ->
-                isUploading = false
-                onError(error.message ?: "업로드 실패")
-            }
-        }
-    }
-}

From ba74537852081f9d6eaf9f0d9a708396d8a3d6bd Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 13:13:08 +0900
Subject: [PATCH 04/17] =?UTF-8?q?refactor:=20ViewModel=20=ED=8C=A9?=
 =?UTF-8?q?=ED=86=A0=EB=A6=AC=20=EB=B0=8F=20=EA=B2=8C=EC=8B=9C=EA=B8=80=20?=
 =?UTF-8?q?=EB=AA=A9=EB=A1=9D=20=EC=83=88=EB=A1=9C=EA=B3=A0=EC=B9=A8=20?=
 =?UTF-8?q?=EB=A1=9C=EC=A7=81=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

ViewModel을 주입하는 방식을 익명 객체 `ViewModelProvider.Factory`를 사용하도록 변경하여 코드를 간소화했습니다. 또한, `PostListScreen`에 `DisposableEffect`와 `LifecycleEventObserver`를 사용하여 화면이 다시 활성화될 때마다 게시글 목록을 자동으로 새로고침하는 기능을 추가했습니다.

*   **ViewModel 팩토리 리팩토링**:
    *   `PostCreateScreen`, `PostDetailScreen`, `PostEditScreen`, `PostListScreen`: `viewModel()` 함수에 익명 클래스로 `ViewModelProvider.Factory`를 구현하여 ViewModel 인스턴스를 생성하도록 수정했습니다.

*   **게시글 목록 자동 새로고침**:
    *   `PostListScreen.kt`: 화면의 생명주기(Lifecycle)가 `ON_RESUME` 상태일 때 `viewModel.refresh()`를 호출하도록 `DisposableEffect`를 추가했습니다. 이를 통해 다른 화면에서 게시글을 생성, 수정, 삭제하고 목록 화면으로 돌아왔을 때 변경 사항이 즉시 반영됩니다.

*   **ViewModel 예외 처리 개선**:
    *   `PostCreateViewModel.kt`, `PostEditViewModel.kt`: 이미지 업로드 시 파일 변환에 실패하는 경우, `runCatching` 대신 `if (file == null)` 체크를 통해 명시적으로 예외를 처리하도록 수정했습니다.
---
 .../ui/post/screen/PostCreateScreen.kt        | 12 ++++--
 .../ui/post/screen/PostDetailScreen.kt        | 12 ++++--
 .../ui/post/screen/PostEditScreen.kt          | 12 ++++--
 .../ui/post/screen/PostListScreen.kt          | 31 ++++++++++++--
 .../ui/post/viewmodel/PostCreateViewModel.kt  | 40 ++++++++++---------
 .../ui/post/viewmodel/PostEditViewModel.kt    | 39 +++++++++---------
 6 files changed, 94 insertions(+), 52 deletions(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 0449fe6..7448808 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -51,6 +51,8 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -62,10 +64,12 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    viewModel: PostCreateViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostCreateViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostCreateViewModel = viewModel<PostCreateViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostCreateViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index 3b377bc..509b3c1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -44,6 +44,8 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -57,10 +59,12 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
-    viewModel: PostDetailViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostDetailViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostDetailViewModel = viewModel<PostDetailViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostDetailViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 552e8a5..8ce347a 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -50,6 +50,8 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -62,10 +64,12 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
-    viewModel: PostEditViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostEditViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostEditViewModel = viewModel<PostEditViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostEditViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 866b3aa..6d298f1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -18,10 +18,16 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.component.PostItem
@@ -32,15 +38,32 @@ import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostListViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostListViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostListViewModel = viewModel<PostListViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostListViewModel(appContainer.postRepository) as T
+            }
         }
     )
 ) {
     val uiState = viewModel.uiState
     val posts = uiState.posts
+    val lifecycleOwner = LocalLifecycleOwner.current
+
+    DisposableEffect(lifecycleOwner) {//lifecycleOwner가 변경될 때마다 실행
+        //LaunchedEffect와 달리 화면이 처음 나타날 때뿐만 아니라 다시 나타날 때도 실행
+        val observer = LifecycleEventObserver { _, event -> //lifecycle 이벤트를 감지하는 옵저버
+            //event로 상태 변화 받음
+            if (event == Lifecycle.Event.ON_RESUME) {//화면이 다시 활성화되면
+                viewModel.refresh()
+            }
+        }
+        lifecycleOwner.lifecycle.addObserver(observer)//화면 상태가 바뀔 때마다 알림을 받기 위해 옵저버 등록
+        onDispose {//화면이 사라질 때
+            lifecycleOwner.lifecycle.removeObserver(observer)
+        }
+    }
 
     LaunchedEffect(Unit) {
         viewModel.refresh()
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index 26f4da8..34eeb67 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -8,11 +8,13 @@ import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.util.UriUtils
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+//PostViewModel을 PostListViewModel, PostCreateViewModel, PostDetailViewModel, PostEditViewModel로 분리
 //uiState를 통해 상태를 한 번에 모아 처리
 data class PostCreateUiState(
     val uploadedImageUrl: String? = null,
@@ -53,26 +55,28 @@ class PostCreateViewModel(
     ) {
         viewModelScope.launch {
             uiState = uiState.copy(isUploading = true)
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                repository.uploadImage(body)
-            }.onSuccess { imageUrl ->
-                uiState = uiState.copy(
-                    isUploading = false,
-                    uploadedImageUrl = imageUrl
-                )
-                onSuccess(imageUrl)
-            }.onFailure { error ->
+            val file = UriUtils.uriToFile(context, uri)
+            if (file == null) {
                 uiState = uiState.copy(isUploading = false)
-                onError(error.message ?: "업로드 실패")
+                onError("파일 변환 실패")
+                return@launch
             }
+
+            val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+            val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+            repository.uploadImage(body)
+                .onSuccess { imageUrl ->
+                    uiState = uiState.copy(
+                        isUploading = false,
+                        uploadedImageUrl = imageUrl
+                    )
+                    onSuccess(imageUrl)
+                }
+                .onFailure { error ->
+                    uiState = uiState.copy(isUploading = false)
+                    onError(error.message ?: "업로드 실패")
+                }
         }
     }
 }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
index 21e5124..6234394 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -9,6 +9,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import com.example.kuit6_android_api.util.UriUtils
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
@@ -66,26 +67,28 @@ class PostEditViewModel(
     ) {
         viewModelScope.launch {
             uiState = uiState.copy(isUploading = true)
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                repository.uploadImage(body)
-            }.onSuccess { imageUrl ->
-                uiState = uiState.copy(
-                    isUploading = false,
-                    uploadedImageUrl = imageUrl
-                )
-                onSuccess(imageUrl)
-            }.onFailure { error ->
+            val file = UriUtils.uriToFile(context, uri)
+            if (file == null) {
                 uiState = uiState.copy(isUploading = false)
-                onError(error.message ?: "업로드 실패")
+                onError("파일 변환 실패")
+                return@launch
             }
+
+            val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+            val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+            repository.uploadImage(body)
+                .onSuccess { imageUrl ->
+                    uiState = uiState.copy(
+                        isUploading = false,
+                        uploadedImageUrl = imageUrl
+                    )
+                    onSuccess(imageUrl)
+                }
+                .onFailure { error ->
+                    uiState = uiState.copy(isUploading = false)
+                    onError(error.message ?: "업로드 실패")
+                }
         }
     }
 }

From cb5021297de92e3a7e508db301d44dd02953cc81 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 14:10:37 +0900
Subject: [PATCH 05/17] =?UTF-8?q?refactor:=20ViewModel=20=EC=83=9D?=
 =?UTF-8?q?=EC=84=B1=20=EB=A1=9C=EC=A7=81=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

`PostCreateScreen`에서 ViewModel을 생성하는 방식을 수정했습니다.

*   **PostCreateScreen.kt**: `ViewModelProvider.Factory`를 사용하여 `PostCreateViewModel`을 생성하도록 변경했습니다. 이를 통해 수동으로 생성한 `AppContainer`에서 Repository를 가져와 ViewModel에 주입할 수 있도록 구조를 개선했습니다.
---
 .../kuit6_android_api/ui/post/screen/PostCreateScreen.kt       | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 7448808..be6a63e 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -65,6 +65,9 @@ fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
     viewModel: PostCreateViewModel = viewModel<PostCreateViewModel>(
+        //레포지토리 패턴을 위해 레포지토리를 뷰모델에 파라미터로 전달
+        //레포지토리는 수동 주입(App Container)을 통해 가져옴
+        //뷰모델에 파라미터를 전달하기 위해서 Factory 패턴을 사용
         factory = object : ViewModelProvider.Factory {
             override fun <T : ViewModel> create(modelClass: Class<T>): T {
                 val appContainer = AppContainer()

From 179fd7d610021967b99d008bb038d6099480631d Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Wed, 12 Nov 2025 18:33:31 +0900
Subject: [PATCH 06/17] =?UTF-8?q?refactor:=20[=EB=AF=B8=EC=85=98]=20ViewMo?=
 =?UTF-8?q?del=20=EB=B6=84=EB=A6=AC=20=EB=B0=8F=20Repository=20=ED=8C=A8?=
 =?UTF-8?q?=ED=84=B4=20=EC=A0=81=EC=9A=A9=20=EC=8B=9C=EC=9E=91?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존의 단일 PostViewModel을 PostCreateViewModel, PostDetailViewModel, PostEditViewModel로 분리하여 각 화면의 역할을 명확히 했습니다. 또한, PostRepository를 도입하여 데이터 소스를 추상화하고 ViewModel과 데이터 계층 간의 의존성을 분리했습니다.

*   **Repository 추가**:PostRepository: ApiService를 사용하여 게시글 CRUD 및 이미지 업로드 API를 호출하는 로직을 캡슐화했습니다.

*   **ViewModel 분리**:PostCreateViewModel: 게시글 생성 및 이미지 업로드 기능을 담당합니다.PostDetailViewModel: 게시글 상세 조회 및 삭제 기능을 담당합니다.PostEditViewModel: 게시글 수정, 상세 조회 및 이미지 업로드 기능을 담당합니다.

*   **의존성 주입(DI)**:AppContainer: PostRepository의 인스턴스를 생성하고 관리하여 ViewModel에 주입하는 역할을 합니다.각 Screen(PostCreateScreen, PostDetailScreen, PostEditScreen)에서는 AppContainer를 통해 해당 화면에 맞는 ViewModel을 주입받도록 수정했습니다.
---
 .../data/repository/PostRepository.kt         | 93 ++++++++++++++++++-
 .../kuit6_android_api/di/AppContainer.kt      | 13 +++
 .../ui/post/screen/PostCreateScreen.kt        | 10 +-
 .../ui/post/screen/PostDetailScreen.kt        | 12 ++-
 .../ui/post/screen/PostEditScreen.kt          | 10 +-
 .../ui/post/viewmodel/PostCreateViewModel.kt  | 74 +++++++++++++++
 .../ui/post/viewmodel/PostDetailViewModel.kt  | 39 ++++++++
 .../ui/post/viewmodel/PostEditViewModel.kt    | 90 ++++++++++++++++++
 8 files changed, 331 insertions(+), 10 deletions(-)
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
 create mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt

diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
index cf7a9a5..bd9e2ae 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
@@ -1,7 +1,94 @@
 package com.example.kuit6_android_api.data.repository
 
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.model.request.PostCreateRequest
+import com.example.kuit6_android_api.data.model.response.BaseResponse
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import okhttp3.MultipartBody
 
-interface PostRepository{
-    suspend fun getPosts(): Result<List<PostResponse>>
-}
\ No newline at end of file
+class PostRepository(
+    private val apiService: ApiService
+) {
+    suspend fun getPosts(): Result<List<PostResponse>> {
+        return runCatching {
+            val response: BaseResponse<List<PostResponse>> = apiService.getPosts()
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 목록 조회 실패")
+            }
+        }
+    }
+
+    suspend fun getPostDetail(postId: Long): Result<PostResponse> {
+        return runCatching {
+            val response: BaseResponse<PostResponse> = apiService.getPostDetail(postId)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 상세 조회 실패")
+            }
+        }
+    }
+
+    suspend fun createPost(
+        author: String,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.createPost(author, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 생성 실패")
+            }
+        }
+    }
+
+    suspend fun updatePost(
+        postId: Long,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.updatePost(postId, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 수정 실패")
+            }
+        }
+    }
+
+    suspend fun deletePost(postId: Long): Result<Unit> {
+        return runCatching {
+            val response: BaseResponse<Unit> = apiService.deletePost(postId)
+            if (response.success) {
+                Unit
+            } else {
+                throw Exception(response.message ?: "게시글 삭제 실패")
+            }
+        }
+    }
+
+    suspend fun uploadImage(file: MultipartBody.Part): Result<String> {
+        return runCatching {
+            val response: BaseResponse<Map<String, String>> = apiService.uploadImage(file)
+            if (response.success && response.data != null) {
+                val imageUrl = response.data["imageUrl"]
+                if (imageUrl != null) {
+                    imageUrl
+                } else {
+                    throw Exception("이미지 URL을 받아오지 못했습니다")
+                }
+            } else {
+                throw Exception(response.message ?: "이미지 업로드 실패")
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
new file mode 100644
index 0000000..55cc30b
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
@@ -0,0 +1,13 @@
+package com.example.kuit6_android_api.di
+
+import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.api.RetrofitClient
+import com.example.kuit6_android_api.data.repository.PostRepository
+
+class AppContainer {
+    //모든 의존성을 AppContainer 한 곳에서 관리하게 함
+    val apiService: ApiService = RetrofitClient.apiService
+    //ApiService를 AppContainer에서 한 번만 가져 와 Repository에 주입
+    // 원래 ApiService를 직접 참조하던 ViewModel들이 Repository를 참조
+    val postRepository: PostRepository = PostRepository(apiService)
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 58cee96..a883ad1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -53,7 +53,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostCreateViewModel
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -61,7 +62,12 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostCreateViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostCreateViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index eb617c1..b62e88a 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -46,7 +46,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostDetailViewModel
 import com.example.kuit6_android_api.util.formatDateTime
 import kotlinx.coroutines.launch
 
@@ -56,7 +57,12 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostDetailViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostDetailViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val post = viewModel.postDetail
@@ -64,7 +70,7 @@ fun PostDetailScreen(
     val scope = rememberCoroutineScope()
 
     LaunchedEffect(postId) {
-//        viewModel.getPostDetail(postId)
+        viewModel.getPostDetail(postId)
     }
 
     Scaffold(
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 5f8283e..df642f5 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -52,7 +52,8 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
+import com.example.kuit6_android_api.di.AppContainer
+import com.example.kuit6_android_api.ui.post.viewmodel.PostEditViewModel
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -61,7 +62,12 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
-    viewModel: PostViewModel = viewModel(),
+    viewModel: PostEditViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostEditViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    ),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
new file mode 100644
index 0000000..6a05b1f
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -0,0 +1,74 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import android.content.Context
+import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import kotlinx.coroutines.launch
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+
+class PostCreateViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var uploadedImageUrl by mutableStateOf<String?>(null)
+        private set
+
+    var isUploading by mutableStateOf(false)
+        private set
+
+    fun createPost(
+        author: String,
+        title: String,
+        content: String,
+        imageUrl: String? = null,
+        onSuccess: () -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            repository.createPost(author, title, content, imageUrl)
+                .onSuccess {
+                    clearUploadedImageUrl()
+                    onSuccess()
+                }
+        }
+    }
+
+    fun clearUploadedImageUrl() {
+        uploadedImageUrl = null
+    }
+
+    fun uploadImage(
+        context: Context,
+        uri: Uri,
+        onSuccess: (String) -> Unit = {},
+        onError: (String) -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            isUploading = true
+            runCatching {
+                val file = UriUtils.uriToFile(context, uri)
+                if (file == null) {
+                    throw Exception("파일 변환 실패")
+                }
+
+                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+                repository.uploadImage(body)
+            }.onSuccess { imageUrl ->
+                isUploading = false
+                uploadedImageUrl = imageUrl
+                onSuccess(imageUrl)
+            }.onFailure { error ->
+                isUploading = false
+                onError(error.message ?: "업로드 실패")
+            }
+        }
+    }
+}
+
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
new file mode 100644
index 0000000..ae8e59d
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
@@ -0,0 +1,39 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.model.response.PostResponse
+import kotlinx.coroutines.launch
+
+class PostDetailViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var postDetail by mutableStateOf<PostResponse?>(null)
+        private set
+
+    fun getPostDetail(postId: Long) {
+        viewModelScope.launch {
+            repository.getPostDetail(postId)
+                .onSuccess { post ->
+                    postDetail = post
+                }
+                .onFailure {
+                    postDetail = null
+                }
+        }
+    }
+
+    fun deletePost(postId: Long, onSuccess: () -> Unit = {}) {
+        viewModelScope.launch {
+            repository.deletePost(postId)
+                .onSuccess {
+                    onSuccess()
+                }
+        }
+    }
+}
+
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
new file mode 100644
index 0000000..0d3e6a5
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -0,0 +1,90 @@
+package com.example.kuit6_android_api.ui.post.viewmodel
+
+import android.content.Context
+import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.model.response.PostResponse
+import kotlinx.coroutines.launch
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+
+class PostEditViewModel(
+    private val repository: PostRepository
+) : ViewModel() {
+    var postDetail by mutableStateOf<PostResponse?>(null)
+        private set
+
+    var uploadedImageUrl by mutableStateOf<String?>(null)
+        private set
+
+    var isUploading by mutableStateOf(false)
+        private set
+
+    fun getPostDetail(postId: Long) {
+        viewModelScope.launch {
+            repository.getPostDetail(postId)
+                .onSuccess { post ->
+                    postDetail = post
+                }
+                .onFailure {
+                    postDetail = null
+                }
+        }
+    }
+
+    fun updatePost(
+        postId: Long,
+        title: String,
+        content: String,
+        imageUrl: String? = null,
+        onSuccess: () -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            repository.updatePost(postId, title, content, imageUrl)
+                .onSuccess {
+                    clearUploadedImageUrl()
+                    onSuccess()
+                }
+        }
+    }
+
+    fun clearUploadedImageUrl() {
+        uploadedImageUrl = null
+    }
+
+    fun uploadImage(
+        context: Context,
+        uri: Uri,
+        onSuccess: (String) -> Unit = {},
+        onError: (String) -> Unit = {}
+    ) {
+        viewModelScope.launch {
+            isUploading = true
+            runCatching {
+                val file = UriUtils.uriToFile(context, uri)
+                if (file == null) {
+                    throw Exception("파일 변환 실패")
+                }
+
+                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+                repository.uploadImage(body)
+            }.onSuccess { imageUrl ->
+                isUploading = false
+                uploadedImageUrl = imageUrl
+                onSuccess(imageUrl)
+            }.onFailure { error ->
+                isUploading = false
+                onError(error.message ?: "업로드 실패")
+            }
+        }
+    }
+}
+

From aca901537c872cdf67c80c910eeed32e4bff364a Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 12:20:10 +0900
Subject: [PATCH 07/17] =?UTF-8?q?refactor:=20ViewModel=20=EB=B6=84?=
 =?UTF-8?q?=EB=A6=AC=20=EB=B0=8F=20UI=20=EC=83=81=ED=83=9C=20=EA=B4=80?=
 =?UTF-8?q?=EB=A6=AC=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존의 단일 `PostViewModel`을 `PostListViewModel`으로 이름을 변경하고 목록 조회 기능만 남도록 역할을 축소했습니다. 또한, 각 ViewModel에서 개별적으로 관리하던 상태 변수들을 `PostListUiState`, `PostCreateUiState`, `PostDetailUiState`, `PostEditUiState`와 같은 데이터 클래스로 통합하여 상태 관리를 개선했습니다.

*   **ViewModel 분리 및 리팩토링**:
    *   `PostViewModel.kt`: 기존의 다기능 ViewModel을 삭제했습니다.
    *   `PostListViewModel.kt`: 게시글 목록 조회를 담당하는 ViewModel을 새로 생성하고, `PostListUiState`를 사용하여 UI 상태를 관리합니다. `getPosts()` 메서드는 `refresh()`로 이름을 변경했습니다.
    *   `PostCreateViewModel`, `PostDetailViewModel`, `PostEditViewModel`: 각 ViewModel의 상태 변수들(`uploadedImageUrl`, `isUploading`, `postDetail` 등)을 `UiState` 데이터 클래스로 캡슐화하여 관리하도록 수정했습니다.

*   **UI 및 화면 로직 수정**:
    *   `PostListScreen.kt`: `PostListViewModel`과 `PostListUiState`를 사용하도록 변경했습니다.
    *   `PostCreateScreen.kt`, `PostDetailScreen.kt`, `PostEditScreen.kt`: 각 화면에서 ViewModel의 `UiState`를 참조하여 UI를 렌더링하도록 수정했습니다.
---
 .../ui/post/screen/PostCreateScreen.kt        |  11 +-
 .../ui/post/screen/PostDetailScreen.kt        |   3 +-
 .../ui/post/screen/PostEditScreen.kt          |   9 +-
 .../ui/post/screen/PostListScreen.kt          |  53 ++++---
 .../ui/post/viewmodel/PostCreateViewModel.kt  |  25 ++--
 .../ui/post/viewmodel/PostDetailViewModel.kt  |  10 +-
 .../ui/post/viewmodel/PostEditViewModel.kt    |  32 ++--
 .../ui/post/viewmodel/PostListViewModel.kt    |  40 +++--
 .../ui/post/viewmodel/PostViewModel.kt        | 141 ------------------
 9 files changed, 94 insertions(+), 230 deletions(-)
 delete mode 100644 app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index a883ad1..0449fe6 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -71,6 +71,7 @@ fun PostCreateScreen(
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
+    val uiState = viewModel.uiState
     var author by remember { mutableStateOf("") }
     var title by remember { mutableStateOf("") }
     var content by remember { mutableStateOf("") }
@@ -204,7 +205,7 @@ fun PostCreateScreen(
                             color = MaterialTheme.colorScheme.onSurface
                         )
 
-                        if (selectedImageUri == null && !viewModel.isUploading) {
+                        if (selectedImageUri == null && !uiState.isUploading) {
                             FilledTonalButton(
                                 onClick = { imagePickerLauncher.launch("image/*") },
                                 shape = RoundedCornerShape(10.dp)
@@ -215,7 +216,7 @@ fun PostCreateScreen(
                     }
 
                     // 업로드 중 표시
-                    if (viewModel.isUploading) {
+                    if (uiState.isUploading) {
                         Spacer(modifier = Modifier.height(12.dp))
                         Row(
                             verticalAlignment = Alignment.CenterVertically,
@@ -236,7 +237,7 @@ fun PostCreateScreen(
                     }
 
                     // 업로드된 이미지 미리보기
-                    if (selectedImageUri != null && !viewModel.isUploading) {
+                    if (selectedImageUri != null && !uiState.isUploading) {
                         Spacer(modifier = Modifier.height(12.dp))
                         Box(
                             modifier = Modifier.fillMaxWidth()
@@ -276,7 +277,7 @@ fun PostCreateScreen(
             Button(
                 onClick = {
                     val finalAuthor = author
-                    viewModel.createPost(finalAuthor, title, content, viewModel.uploadedImageUrl) {
+                    viewModel.createPost(finalAuthor, title, content, uiState.uploadedImageUrl) {
                         onPostCreated()
                         scope.launch { snackBarState.showSnackbar("게시글이 작성되었습니다.") }
                     }
@@ -284,7 +285,7 @@ fun PostCreateScreen(
                 modifier = Modifier
                     .fillMaxWidth()
                     .height(56.dp),
-                enabled = title.isNotBlank() && content.isNotBlank() && !viewModel.isUploading,
+                enabled = title.isNotBlank() && content.isNotBlank() && !uiState.isUploading,
                 shape = RoundedCornerShape(16.dp),
                 elevation = ButtonDefaults.buttonElevation(
                     defaultElevation = 4.dp,
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index b62e88a..3b377bc 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -65,7 +65,8 @@ fun PostDetailScreen(
     ),
     snackBarState: SnackbarHostState
 ) {
-    val post = viewModel.postDetail
+    val uiState = viewModel.uiState
+    val post = uiState.postDetail
     var showDeleteDialog by remember { mutableStateOf(false) }
     val scope = rememberCoroutineScope()
 
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index df642f5..552e8a5 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -71,7 +71,8 @@ fun PostEditScreen(
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
-    val post = viewModel.postDetail
+    val uiState = viewModel.uiState
+    val post = uiState.postDetail
     val scope = rememberCoroutineScope()
 
     var title by remember { mutableStateOf("") }
@@ -237,7 +238,7 @@ fun PostEditScreen(
                 Button(
                     onClick = {
                         val imageUrl = if (selectedImageUri != null) {
-                            viewModel.uploadedImageUrl
+                            uiState.uploadedImageUrl
                         } else {
                             post?.imageUrl
                         }
@@ -251,14 +252,14 @@ fun PostEditScreen(
                     modifier = Modifier
                         .fillMaxWidth()
                         .height(56.dp),
-                    enabled = title.isNotBlank() && content.isNotBlank() && !viewModel.isUploading,
+                    enabled = title.isNotBlank() && content.isNotBlank() && !uiState.isUploading,
                     shape = RoundedCornerShape(12.dp),
                     colors = ButtonDefaults.buttonColors(
                         containerColor = MaterialTheme.colorScheme.primary,
                         disabledContainerColor = MaterialTheme.colorScheme.surfaceVariant
                     )
                 ) {
-                    if (viewModel.isUploading) {
+                    if (uiState.isUploading) {
                         Row(
                             horizontalArrangement = Arrangement.Center,
                             verticalAlignment = Alignment.CenterVertically
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index ec9f704..866b3aa 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -19,25 +19,32 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.component.PostItem
-import com.example.kuit6_android_api.ui.post.state.PostListUiState
 import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
-import com.example.kuit6_android_api.ui.post.viewmodel.PostViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostListViewModel
+    viewModel: PostListViewModel = viewModel(
+        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
+            val appContainer = AppContainer()
+            PostListViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+        }
+    )
 ) {
-    val uiState by viewModel.uiState.collectAsState()
+    val uiState = viewModel.uiState
+    val posts = uiState.posts
 
+    LaunchedEffect(Unit) {
+        viewModel.refresh()
+    }
 
     Scaffold(
         topBar = {
@@ -51,29 +58,19 @@ fun PostListScreen(
             }
         }
     ) { paddingValues ->
-        when(uiState){
-            is PostListUiState.Loading->{
-                CircularProgressIndicator()
-            }
-            is PostListUiState.Success-> {
-                LazyColumn(
-                    modifier = Modifier
-                        .fillMaxSize()
-                        .padding(paddingValues)
-                        .background(MaterialTheme.colorScheme.background),
-                    contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
-                    verticalArrangement = Arrangement.spacedBy(16.dp)
-                ) {
-                    items((uiState as PostListUiState.Success).posts) { post ->
-                        PostItem(
-                            post = post,
-                            onClick = { onPostClick(post.id) }
-                        )
-                    }
-                }
-            }
-            is PostListUiState.Error->{
-
+        LazyColumn(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+                .background(MaterialTheme.colorScheme.background),
+            contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            items(posts) { post ->
+                PostItem(
+                    post = post,
+                    onClick = { onPostClick(post.id) }
+                )
             }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index 6a05b1f..26f4da8 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -13,13 +13,16 @@ import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+//uiState를 통해 상태를 한 번에 모아 처리
+data class PostCreateUiState(
+    val uploadedImageUrl: String? = null,
+    val isUploading: Boolean = false
+)
+
 class PostCreateViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
+    var uiState by mutableStateOf(PostCreateUiState())
         private set
 
     fun createPost(
@@ -32,14 +35,14 @@ class PostCreateViewModel(
         viewModelScope.launch {
             repository.createPost(author, title, content, imageUrl)
                 .onSuccess {
-                    clearUploadedImageUrl()
+                    uiState = uiState.copy(uploadedImageUrl = null)
                     onSuccess()
                 }
         }
     }
 
     fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
+        uiState = uiState.copy(uploadedImageUrl = null)
     }
 
     fun uploadImage(
@@ -49,7 +52,7 @@ class PostCreateViewModel(
         onError: (String) -> Unit = {}
     ) {
         viewModelScope.launch {
-            isUploading = true
+            uiState = uiState.copy(isUploading = true)
             runCatching {
                 val file = UriUtils.uriToFile(context, uri)
                 if (file == null) {
@@ -61,11 +64,13 @@ class PostCreateViewModel(
 
                 repository.uploadImage(body)
             }.onSuccess { imageUrl ->
-                isUploading = false
-                uploadedImageUrl = imageUrl
+                uiState = uiState.copy(
+                    isUploading = false,
+                    uploadedImageUrl = imageUrl
+                )
                 onSuccess(imageUrl)
             }.onFailure { error ->
-                isUploading = false
+                uiState = uiState.copy(isUploading = false)
                 onError(error.message ?: "업로드 실패")
             }
         }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
index ae8e59d..6544df0 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt
@@ -9,20 +9,24 @@ import com.example.kuit6_android_api.data.repository.PostRepository
 import com.example.kuit6_android_api.data.model.response.PostResponse
 import kotlinx.coroutines.launch
 
+data class PostDetailUiState(
+    val postDetail: PostResponse? = null
+)
+
 class PostDetailViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
+    var uiState by mutableStateOf(PostDetailUiState())
         private set
 
     fun getPostDetail(postId: Long) {
         viewModelScope.launch {
             repository.getPostDetail(postId)
                 .onSuccess { post ->
-                    postDetail = post
+                    uiState = uiState.copy(postDetail = post)
                 }
                 .onFailure {
-                    postDetail = null
+                    uiState = uiState.copy(postDetail = null)
                 }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
index 0d3e6a5..21e5124 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -14,26 +14,26 @@ import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+data class PostEditUiState(
+    val postDetail: PostResponse? = null,
+    val uploadedImageUrl: String? = null,
+    val isUploading: Boolean = false
+)
+
 class PostEditViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
-        private set
-
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
+    var uiState by mutableStateOf(PostEditUiState())
         private set
 
     fun getPostDetail(postId: Long) {
         viewModelScope.launch {
             repository.getPostDetail(postId)
                 .onSuccess { post ->
-                    postDetail = post
+                    uiState = uiState.copy(postDetail = post)
                 }
                 .onFailure {
-                    postDetail = null
+                    uiState = uiState.copy(postDetail = null)
                 }
         }
     }
@@ -48,14 +48,14 @@ class PostEditViewModel(
         viewModelScope.launch {
             repository.updatePost(postId, title, content, imageUrl)
                 .onSuccess {
-                    clearUploadedImageUrl()
+                    uiState = uiState.copy(uploadedImageUrl = null)
                     onSuccess()
                 }
         }
     }
 
     fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
+        uiState = uiState.copy(uploadedImageUrl = null)
     }
 
     fun uploadImage(
@@ -65,7 +65,7 @@ class PostEditViewModel(
         onError: (String) -> Unit = {}
     ) {
         viewModelScope.launch {
-            isUploading = true
+            uiState = uiState.copy(isUploading = true)
             runCatching {
                 val file = UriUtils.uriToFile(context, uri)
                 if (file == null) {
@@ -77,11 +77,13 @@ class PostEditViewModel(
 
                 repository.uploadImage(body)
             }.onSuccess { imageUrl ->
-                isUploading = false
-                uploadedImageUrl = imageUrl
+                uiState = uiState.copy(
+                    isUploading = false,
+                    uploadedImageUrl = imageUrl
+                )
                 onSuccess(imageUrl)
             }.onFailure { error ->
-                isUploading = false
+                uiState = uiState.copy(isUploading = false)
                 onError(error.message ?: "업로드 실패")
             }
         }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
index 9e1cb77..7040496 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
@@ -1,39 +1,33 @@
 package com.example.kuit6_android_api.ui.post.viewmodel
 
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
-import com.example.kuit6_android_api.ui.post.state.PostListUiState
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.asStateFlow
+import com.example.kuit6_android_api.data.model.response.PostResponse
 import kotlinx.coroutines.launch
 
+data class PostListUiState(
+    val posts: List<PostResponse> = emptyList()
+)
+
 class PostListViewModel(
-    private val postRepository: PostRepository
+    private val repository: PostRepository
 ) : ViewModel() {
-    private val _uiState = MutableStateFlow<PostListUiState>(PostListUiState.Loading)
-    val uiState: StateFlow<PostListUiState> = _uiState.asStateFlow()
-
-    init {
-        loadPosts()
-    }
+    var uiState by mutableStateOf(PostListUiState())
+        private set
 
-    private fun loadPosts() {
+    fun refresh() {
         viewModelScope.launch {
-            _uiState.value = PostListUiState.Loading
-            postRepository.getPosts()
+            repository.getPosts()
                 .onSuccess { posts ->
-                    _uiState.value = PostListUiState.Success(posts)
+                    uiState = uiState.copy(posts = posts)
                 }
-                .onFailure {error->
-                    _uiState.value = PostListUiState.Error(
-                        message = error.message?:"error"
-                    )
+                .onFailure {
+                    uiState = uiState.copy(posts = emptyList())
                 }
         }
     }
-    fun refresh(){
-        loadPosts()
-    }
-}
\ No newline at end of file
+}
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
deleted file mode 100644
index 38b407f..0000000
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt
+++ /dev/null
@@ -1,141 +0,0 @@
-package com.example.kuit6_android_api.ui.post.viewmodel
-
-import android.content.Context
-import android.net.Uri
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import com.example.kuit6_android_api.data.api.RetrofitClient
-import com.example.kuit6_android_api.data.model.request.PostCreateRequest
-import com.example.kuit6_android_api.data.model.response.PostResponse
-import com.example.kuit6_android_api.util.UriUtils
-import kotlinx.coroutines.launch
-import okhttp3.MediaType.Companion.toMediaTypeOrNull
-import okhttp3.MultipartBody
-import okhttp3.RequestBody.Companion.asRequestBody
-
-class PostViewModel : ViewModel() {
-    var postDetail by mutableStateOf<PostResponse?>(null)
-        private set
-
-    var uploadedImageUrl by mutableStateOf<String?>(null)
-        private set
-
-    var isUploading by mutableStateOf(false)
-        private set
-
-    private val apiService = RetrofitClient.apiService
-
-    fun getPostDetail(postId: Long) {
-        viewModelScope.launch {
-            runCatching {
-                apiService.getPostDetail(postId)
-            }.onSuccess { response ->
-                if (response.success && response.data != null) {
-                    postDetail = response.data
-                }
-            }.onFailure { error ->
-                // 에러 처리
-                postDetail = null
-            }
-        }
-    }
-
-    fun createPost(
-        author: String,
-        title: String,
-        content: String,
-        imageUrl: String? = null,
-        onSuccess: () -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            runCatching {
-                val request = PostCreateRequest(title, content, imageUrl)
-                apiService.createPost(author, request)
-            }.onSuccess { response ->
-                if (response.success) {
-                    // 이미지 업로드 관련 코드
-                    clearUploadedImageUrl()
-                    onSuccess()
-                }
-            }
-        }
-    }
-
-    fun updatePost(
-        postId: Long,
-        title: String,
-        content: String,
-        imageUrl: String? = null,
-        onSuccess: () -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            runCatching {
-                val request = PostCreateRequest(title, content, imageUrl)
-                apiService.updatePost(postId, request)
-            }.onSuccess { response ->
-                if (response.success) {
-                    clearUploadedImageUrl()
-                    onSuccess()
-                }
-            }.onFailure { error ->
-                // 에러 처리
-            }
-        }
-    }
-
-    fun deletePost(postId: Long, onSuccess: () -> Unit = {}) {
-        viewModelScope.launch {
-            runCatching {
-                apiService.deletePost(postId)
-            }.onSuccess { response ->
-                if (response.success) {
-                    onSuccess()
-                }
-            }.onFailure { error ->
-
-            }
-        }
-    }
-
-    fun clearUploadedImageUrl() {
-        uploadedImageUrl = null
-    }
-
-    // 이미지 업로드 함수
-    fun uploadImage(
-        context: Context,
-        uri: Uri,
-        onSuccess: (String) -> Unit = {},
-        onError: (String) -> Unit = {}
-    ) {
-        viewModelScope.launch {
-            isUploading = true
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                apiService.uploadImage(body)
-            }.onSuccess { response ->
-                isUploading = false
-                if (response.success && response.data != null) {
-                    val imageUrl = response.data["imageUrl"]
-                    if (imageUrl != null) {
-                        uploadedImageUrl = imageUrl
-                        onSuccess(imageUrl)
-                    }
-                }
-            }.onFailure { error ->
-                isUploading = false
-                onError(error.message ?: "업로드 실패")
-            }
-        }
-    }
-}

From fd56889a6347776340ee86e5cfedeb774035edf7 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 13:13:08 +0900
Subject: [PATCH 08/17] =?UTF-8?q?refactor:=20ViewModel=20=ED=8C=A9?=
 =?UTF-8?q?=ED=86=A0=EB=A6=AC=20=EB=B0=8F=20=EA=B2=8C=EC=8B=9C=EA=B8=80=20?=
 =?UTF-8?q?=EB=AA=A9=EB=A1=9D=20=EC=83=88=EB=A1=9C=EA=B3=A0=EC=B9=A8=20?=
 =?UTF-8?q?=EB=A1=9C=EC=A7=81=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

ViewModel을 주입하는 방식을 익명 객체 `ViewModelProvider.Factory`를 사용하도록 변경하여 코드를 간소화했습니다. 또한, `PostListScreen`에 `DisposableEffect`와 `LifecycleEventObserver`를 사용하여 화면이 다시 활성화될 때마다 게시글 목록을 자동으로 새로고침하는 기능을 추가했습니다.

*   **ViewModel 팩토리 리팩토링**:
    *   `PostCreateScreen`, `PostDetailScreen`, `PostEditScreen`, `PostListScreen`: `viewModel()` 함수에 익명 클래스로 `ViewModelProvider.Factory`를 구현하여 ViewModel 인스턴스를 생성하도록 수정했습니다.

*   **게시글 목록 자동 새로고침**:
    *   `PostListScreen.kt`: 화면의 생명주기(Lifecycle)가 `ON_RESUME` 상태일 때 `viewModel.refresh()`를 호출하도록 `DisposableEffect`를 추가했습니다. 이를 통해 다른 화면에서 게시글을 생성, 수정, 삭제하고 목록 화면으로 돌아왔을 때 변경 사항이 즉시 반영됩니다.

*   **ViewModel 예외 처리 개선**:
    *   `PostCreateViewModel.kt`, `PostEditViewModel.kt`: 이미지 업로드 시 파일 변환에 실패하는 경우, `runCatching` 대신 `if (file == null)` 체크를 통해 명시적으로 예외를 처리하도록 수정했습니다.
---
 .../ui/post/screen/PostCreateScreen.kt        | 12 ++++--
 .../ui/post/screen/PostDetailScreen.kt        | 12 ++++--
 .../ui/post/screen/PostEditScreen.kt          | 12 ++++--
 .../ui/post/screen/PostListScreen.kt          | 31 ++++++++++++--
 .../ui/post/viewmodel/PostCreateViewModel.kt  | 40 ++++++++++---------
 .../ui/post/viewmodel/PostEditViewModel.kt    | 39 +++++++++---------
 6 files changed, 94 insertions(+), 52 deletions(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 0449fe6..7448808 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -51,6 +51,8 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -62,10 +64,12 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    viewModel: PostCreateViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostCreateViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostCreateViewModel = viewModel<PostCreateViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostCreateViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index 3b377bc..509b3c1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -44,6 +44,8 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -57,10 +59,12 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
-    viewModel: PostDetailViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostDetailViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostDetailViewModel = viewModel<PostDetailViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostDetailViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 552e8a5..8ce347a 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -50,6 +50,8 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.example.kuit6_android_api.di.AppContainer
@@ -62,10 +64,12 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
-    viewModel: PostEditViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostEditViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostEditViewModel = viewModel<PostEditViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostEditViewModel(appContainer.postRepository) as T
+            }
         }
     ),
     snackBarState: SnackbarHostState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 866b3aa..6d298f1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -18,10 +18,16 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.component.PostItem
@@ -32,15 +38,32 @@ import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostListViewModel = viewModel(
-        factory = androidx.lifecycle.ViewModelProvider.Factory { modelClass ->
-            val appContainer = AppContainer()
-            PostListViewModel(appContainer.postRepository) as androidx.lifecycle.ViewModel
+    viewModel: PostListViewModel = viewModel<PostListViewModel>(
+        factory = object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val appContainer = AppContainer()
+                return PostListViewModel(appContainer.postRepository) as T
+            }
         }
     )
 ) {
     val uiState = viewModel.uiState
     val posts = uiState.posts
+    val lifecycleOwner = LocalLifecycleOwner.current
+
+    DisposableEffect(lifecycleOwner) {//lifecycleOwner가 변경될 때마다 실행
+        //LaunchedEffect와 달리 화면이 처음 나타날 때뿐만 아니라 다시 나타날 때도 실행
+        val observer = LifecycleEventObserver { _, event -> //lifecycle 이벤트를 감지하는 옵저버
+            //event로 상태 변화 받음
+            if (event == Lifecycle.Event.ON_RESUME) {//화면이 다시 활성화되면
+                viewModel.refresh()
+            }
+        }
+        lifecycleOwner.lifecycle.addObserver(observer)//화면 상태가 바뀔 때마다 알림을 받기 위해 옵저버 등록
+        onDispose {//화면이 사라질 때
+            lifecycleOwner.lifecycle.removeObserver(observer)
+        }
+    }
 
     LaunchedEffect(Unit) {
         viewModel.refresh()
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index 26f4da8..34eeb67 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -8,11 +8,13 @@ import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.util.UriUtils
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
+//PostViewModel을 PostListViewModel, PostCreateViewModel, PostDetailViewModel, PostEditViewModel로 분리
 //uiState를 통해 상태를 한 번에 모아 처리
 data class PostCreateUiState(
     val uploadedImageUrl: String? = null,
@@ -53,26 +55,28 @@ class PostCreateViewModel(
     ) {
         viewModelScope.launch {
             uiState = uiState.copy(isUploading = true)
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                repository.uploadImage(body)
-            }.onSuccess { imageUrl ->
-                uiState = uiState.copy(
-                    isUploading = false,
-                    uploadedImageUrl = imageUrl
-                )
-                onSuccess(imageUrl)
-            }.onFailure { error ->
+            val file = UriUtils.uriToFile(context, uri)
+            if (file == null) {
                 uiState = uiState.copy(isUploading = false)
-                onError(error.message ?: "업로드 실패")
+                onError("파일 변환 실패")
+                return@launch
             }
+
+            val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+            val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+            repository.uploadImage(body)
+                .onSuccess { imageUrl ->
+                    uiState = uiState.copy(
+                        isUploading = false,
+                        uploadedImageUrl = imageUrl
+                    )
+                    onSuccess(imageUrl)
+                }
+                .onFailure { error ->
+                    uiState = uiState.copy(isUploading = false)
+                    onError(error.message ?: "업로드 실패")
+                }
         }
     }
 }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
index 21e5124..6234394 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt
@@ -9,6 +9,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import com.example.kuit6_android_api.util.UriUtils
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.MultipartBody
@@ -66,26 +67,28 @@ class PostEditViewModel(
     ) {
         viewModelScope.launch {
             uiState = uiState.copy(isUploading = true)
-            runCatching {
-                val file = UriUtils.uriToFile(context, uri)
-                if (file == null) {
-                    throw Exception("파일 변환 실패")
-                }
-
-                val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
-                val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
-
-                repository.uploadImage(body)
-            }.onSuccess { imageUrl ->
-                uiState = uiState.copy(
-                    isUploading = false,
-                    uploadedImageUrl = imageUrl
-                )
-                onSuccess(imageUrl)
-            }.onFailure { error ->
+            val file = UriUtils.uriToFile(context, uri)
+            if (file == null) {
                 uiState = uiState.copy(isUploading = false)
-                onError(error.message ?: "업로드 실패")
+                onError("파일 변환 실패")
+                return@launch
             }
+
+            val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+            val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+
+            repository.uploadImage(body)
+                .onSuccess { imageUrl ->
+                    uiState = uiState.copy(
+                        isUploading = false,
+                        uploadedImageUrl = imageUrl
+                    )
+                    onSuccess(imageUrl)
+                }
+                .onFailure { error ->
+                    uiState = uiState.copy(isUploading = false)
+                    onError(error.message ?: "업로드 실패")
+                }
         }
     }
 }

From 460b888ae69235f77b1640947f11a503cc1e0e09 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 14:10:37 +0900
Subject: [PATCH 09/17] =?UTF-8?q?refactor:=20ViewModel=20=EC=83=9D?=
 =?UTF-8?q?=EC=84=B1=20=EB=A1=9C=EC=A7=81=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

`PostCreateScreen`에서 ViewModel을 생성하는 방식을 수정했습니다.

*   **PostCreateScreen.kt**: `ViewModelProvider.Factory`를 사용하여 `PostCreateViewModel`을 생성하도록 변경했습니다. 이를 통해 수동으로 생성한 `AppContainer`에서 Repository를 가져와 ViewModel에 주입할 수 있도록 구조를 개선했습니다.
---
 .../kuit6_android_api/ui/post/screen/PostCreateScreen.kt       | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 7448808..be6a63e 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -65,6 +65,9 @@ fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
     viewModel: PostCreateViewModel = viewModel<PostCreateViewModel>(
+        //레포지토리 패턴을 위해 레포지토리를 뷰모델에 파라미터로 전달
+        //레포지토리는 수동 주입(App Container)을 통해 가져옴
+        //뷰모델에 파라미터를 전달하기 위해서 Factory 패턴을 사용
         factory = object : ViewModelProvider.Factory {
             override fun <T : ViewModel> create(modelClass: Class<T>): T {
                 val appContainer = AppContainer()

From da6b8bba04eb16dfbd20a863da95e1ce902c9dde Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 14:31:18 +0900
Subject: [PATCH 10/17] =?UTF-8?q?chore:=20Gradle=20=ED=94=8C=EB=9F=AC?=
 =?UTF-8?q?=EA=B7=B8=EC=9D=B8=20=EB=B2=84=EC=A0=84=20=EC=97=85=EB=8D=B0?=
 =?UTF-8?q?=EC=9D=B4=ED=8A=B8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Android Gradle Plugin(agp)의 버전을 8.13.0에서 8.13.1로 업데이트했습니다.
---
 gradle/libs.versions.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 20d5c65..d8f06bb 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-agp = "8.13.0"
+agp = "8.13.1"
 kotlin = "2.0.21"
 coreKtx = "1.17.0"
 junit = "4.13.2"

From 04f83ac8279f8e52ca6fed76d47de2f765b32978 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 14:48:26 +0900
Subject: [PATCH 11/17] =?UTF-8?q?refactor:=20PostRepository=EB=A5=BC=20?=
 =?UTF-8?q?=EC=9D=B8=ED=84=B0=ED=8E=98=EC=9D=B4=EC=8A=A4=EB=A1=9C=20?=
 =?UTF-8?q?=EB=B3=80=EA=B2=BD=20=EB=B0=8F=20PostRepositoryImpl=EC=97=90=20?=
 =?UTF-8?q?=EB=AA=A8=EB=93=A0=20=EB=A9=94=EC=84=9C=EB=93=9C=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../data/repository/PostRepository.kt         | 84 ++--------------
 .../data/repository/PostRepositoryImpl.kt     | 95 +++++++++++++++++--
 .../kuit6_android_api/di/AppContainer.kt      |  3 +-
 .../ui/navigation/NavGraph.kt                 |  6 ++
 .../ui/post/screen/PostCreateScreen.kt        | 16 +---
 .../ui/post/screen/PostDetailScreen.kt        | 13 +--
 .../ui/post/screen/PostEditScreen.kt          | 13 +--
 .../ui/post/screen/PostListScreen.kt          | 13 +--
 8 files changed, 108 insertions(+), 135 deletions(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
index bd9e2ae..763366b 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
@@ -1,94 +1,24 @@
 package com.example.kuit6_android_api.data.repository
 
-import com.example.kuit6_android_api.data.api.ApiService
 import com.example.kuit6_android_api.data.model.request.PostCreateRequest
-import com.example.kuit6_android_api.data.model.response.BaseResponse
 import com.example.kuit6_android_api.data.model.response.PostResponse
 import okhttp3.MultipartBody
 
-class PostRepository(
-    private val apiService: ApiService
-) {
-    suspend fun getPosts(): Result<List<PostResponse>> {
-        return runCatching {
-            val response: BaseResponse<List<PostResponse>> = apiService.getPosts()
-            if (response.success && response.data != null) {
-                response.data
-            } else {
-                throw Exception(response.message ?: "게시글 목록 조회 실패")
-            }
-        }
-    }
-
-    suspend fun getPostDetail(postId: Long): Result<PostResponse> {
-        return runCatching {
-            val response: BaseResponse<PostResponse> = apiService.getPostDetail(postId)
-            if (response.success && response.data != null) {
-                response.data
-            } else {
-                throw Exception(response.message ?: "게시글 상세 조회 실패")
-            }
-        }
-    }
-
+interface PostRepository {
+    suspend fun getPosts(): Result<List<PostResponse>>
+    suspend fun getPostDetail(postId: Long): Result<PostResponse>
     suspend fun createPost(
         author: String,
         title: String,
         content: String,
         imageUrl: String?
-    ): Result<PostResponse> {
-        return runCatching {
-            val request = PostCreateRequest(title, content, imageUrl)
-            val response: BaseResponse<PostResponse> = apiService.createPost(author, request)
-            if (response.success && response.data != null) {
-                response.data
-            } else {
-                throw Exception(response.message ?: "게시글 생성 실패")
-            }
-        }
-    }
-
+    ): Result<PostResponse>
     suspend fun updatePost(
         postId: Long,
         title: String,
         content: String,
         imageUrl: String?
-    ): Result<PostResponse> {
-        return runCatching {
-            val request = PostCreateRequest(title, content, imageUrl)
-            val response: BaseResponse<PostResponse> = apiService.updatePost(postId, request)
-            if (response.success && response.data != null) {
-                response.data
-            } else {
-                throw Exception(response.message ?: "게시글 수정 실패")
-            }
-        }
-    }
-
-    suspend fun deletePost(postId: Long): Result<Unit> {
-        return runCatching {
-            val response: BaseResponse<Unit> = apiService.deletePost(postId)
-            if (response.success) {
-                Unit
-            } else {
-                throw Exception(response.message ?: "게시글 삭제 실패")
-            }
-        }
-    }
-
-    suspend fun uploadImage(file: MultipartBody.Part): Result<String> {
-        return runCatching {
-            val response: BaseResponse<Map<String, String>> = apiService.uploadImage(file)
-            if (response.success && response.data != null) {
-                val imageUrl = response.data["imageUrl"]
-                if (imageUrl != null) {
-                    imageUrl
-                } else {
-                    throw Exception("이미지 URL을 받아오지 못했습니다")
-                }
-            } else {
-                throw Exception(response.message ?: "이미지 업로드 실패")
-            }
-        }
-    }
+    ): Result<PostResponse>
+    suspend fun deletePost(postId: Long): Result<Unit>
+    suspend fun uploadImage(file: MultipartBody.Part): Result<String>
 }
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
index b7f1676..b7904fe 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt
@@ -2,21 +2,96 @@ package com.example.kuit6_android_api.data.repository
 
 import android.util.Log
 import com.example.kuit6_android_api.data.api.ApiService
+import com.example.kuit6_android_api.data.model.request.PostCreateRequest
+import com.example.kuit6_android_api.data.model.response.BaseResponse
 import com.example.kuit6_android_api.data.model.response.PostResponse
+import okhttp3.MultipartBody
 
-class PostRepositoryImpl (
+class PostRepositoryImpl(
     private val apiService: ApiService
-): PostRepository {
+) : PostRepository {
     override suspend fun getPosts(): Result<List<PostResponse>> {
-        return runCatching{
-            val response = apiService.getPosts()
-            if(response.success && response.data!=null){
+        return runCatching {
+            val response: BaseResponse<List<PostResponse>> = apiService.getPosts()
+            if (response.success && response.data != null) {
                 response.data
-            }else{
-                throw Exception(response.message ?: "게시긆 불러오기 실패")
+            } else {
+                throw Exception(response.message ?: "게시글 목록 조회 실패")
             }
-        }.onFailure{error->
-            Log.e("PostRepository",error.message.toString())
+        }.onFailure { error ->
+            Log.e("PostRepository", error.message.toString())
         }
     }
-}
\ No newline at end of file
+
+    override suspend fun getPostDetail(postId: Long): Result<PostResponse> {
+        return runCatching {
+            val response: BaseResponse<PostResponse> = apiService.getPostDetail(postId)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 상세 조회 실패")
+            }
+        }
+    }
+
+    override suspend fun createPost(
+        author: String,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.createPost(author, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 생성 실패")
+            }
+        }
+    }
+
+    override suspend fun updatePost(
+        postId: Long,
+        title: String,
+        content: String,
+        imageUrl: String?
+    ): Result<PostResponse> {
+        return runCatching {
+            val request = PostCreateRequest(title, content, imageUrl)
+            val response: BaseResponse<PostResponse> = apiService.updatePost(postId, request)
+            if (response.success && response.data != null) {
+                response.data
+            } else {
+                throw Exception(response.message ?: "게시글 수정 실패")
+            }
+        }
+    }
+
+    override suspend fun deletePost(postId: Long): Result<Unit> {
+        return runCatching {
+            val response: BaseResponse<Unit> = apiService.deletePost(postId)
+            if (response.success) {
+                Unit
+            } else {
+                throw Exception(response.message ?: "게시글 삭제 실패")
+            }
+        }
+    }
+
+    override suspend fun uploadImage(file: MultipartBody.Part): Result<String> {
+        return runCatching {
+            val response: BaseResponse<Map<String, String>> = apiService.uploadImage(file)
+            if (response.success && response.data != null) {
+                val imageUrl = response.data["imageUrl"]
+                if (imageUrl != null) {
+                    imageUrl
+                } else {
+                    throw Exception("이미지 URL을 받아오지 못했습니다")
+                }
+            } else {
+                throw Exception(response.message ?: "이미지 업로드 실패")
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
index 55cc30b..79b98b4 100644
--- a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
@@ -3,11 +3,12 @@ package com.example.kuit6_android_api.di
 import com.example.kuit6_android_api.data.api.ApiService
 import com.example.kuit6_android_api.data.api.RetrofitClient
 import com.example.kuit6_android_api.data.repository.PostRepository
+import com.example.kuit6_android_api.data.repository.PostRepositoryImpl
 
 class AppContainer {
     //모든 의존성을 AppContainer 한 곳에서 관리하게 함
     val apiService: ApiService = RetrofitClient.apiService
     //ApiService를 AppContainer에서 한 번만 가져 와 Repository에 주입
     // 원래 ApiService를 직접 참조하던 ViewModel들이 Repository를 참조
-    val postRepository: PostRepository = PostRepository(apiService)
+    val postRepository: PostRepository = PostRepositoryImpl(apiService)
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt b/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
index bbd692b..cb02fd1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt
@@ -11,6 +11,9 @@ import com.example.kuit6_android_api.ui.post.screen.PostCreateScreen
 import com.example.kuit6_android_api.ui.post.screen.PostDetailScreen
 import com.example.kuit6_android_api.ui.post.screen.PostEditScreen
 import com.example.kuit6_android_api.ui.post.screen.PostListScreen
+import com.example.kuit6_android_api.ui.post.viewmodel.PostCreateViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.PostDetailViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.PostEditViewModel
 import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
 import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 
@@ -47,6 +50,7 @@ fun NavGraph(
                 onEditClick = { postId ->
                     navController.navigate(PostEditRoute(postId))
                 },
+                viewModel = viewModel(factory = postViewModelFactory { PostDetailViewModel(it) }),
                 snackBarState = snackBarState
             )
         }
@@ -59,6 +63,7 @@ fun NavGraph(
                 onPostCreated = {
                     navController.popBackStack()
                 },
+                viewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) }),
                 snackBarState = snackBarState
             )
         }
@@ -74,6 +79,7 @@ fun NavGraph(
                 onPostUpdated = {
                     navController.popBackStack()
                 },
+                viewModel = viewModel(factory = postViewModelFactory { PostEditViewModel(it) }),
                 snackBarState = snackBarState
             )
         }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index be6a63e..2f3a1d2 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -51,12 +51,10 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.viewmodel.PostCreateViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -64,17 +62,7 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    viewModel: PostCreateViewModel = viewModel<PostCreateViewModel>(
-        //레포지토리 패턴을 위해 레포지토리를 뷰모델에 파라미터로 전달
-        //레포지토리는 수동 주입(App Container)을 통해 가져옴
-        //뷰모델에 파라미터를 전달하기 위해서 Factory 패턴을 사용
-        factory = object : ViewModelProvider.Factory {
-            override fun <T : ViewModel> create(modelClass: Class<T>): T {
-                val appContainer = AppContainer()
-                return PostCreateViewModel(appContainer.postRepository) as T
-            }
-        }
-    ),
+    viewModel: PostCreateViewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index 509b3c1..856a727 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -44,12 +44,10 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.viewmodel.PostDetailViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 import com.example.kuit6_android_api.util.formatDateTime
 import kotlinx.coroutines.launch
 
@@ -59,14 +57,7 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
-    viewModel: PostDetailViewModel = viewModel<PostDetailViewModel>(
-        factory = object : ViewModelProvider.Factory {
-            override fun <T : ViewModel> create(modelClass: Class<T>): T {
-                val appContainer = AppContainer()
-                return PostDetailViewModel(appContainer.postRepository) as T
-            }
-        }
-    ),
+    viewModel: PostDetailViewModel = viewModel(factory = postViewModelFactory { PostDetailViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
     val uiState = viewModel.uiState
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 8ce347a..82c3848 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -50,12 +50,10 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
-import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.viewmodel.PostEditViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -64,14 +62,7 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
-    viewModel: PostEditViewModel = viewModel<PostEditViewModel>(
-        factory = object : ViewModelProvider.Factory {
-            override fun <T : ViewModel> create(modelClass: Class<T>): T {
-                val appContainer = AppContainer()
-                return PostEditViewModel(appContainer.postRepository) as T
-            }
-        }
-    ),
+    viewModel: PostEditViewModel = viewModel(factory = postViewModelFactory { PostEditViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
     val context = LocalContext.current
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 6d298f1..43832c6 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -26,26 +26,17 @@ import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.compose.viewModel
-import com.example.kuit6_android_api.di.AppContainer
 import com.example.kuit6_android_api.ui.post.component.PostItem
 import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
+import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun PostListScreen(
     onPostClick: (Long) -> Unit,
     onCreatePostClick: () -> Unit,
-    viewModel: PostListViewModel = viewModel<PostListViewModel>(
-        factory = object : ViewModelProvider.Factory {
-            override fun <T : ViewModel> create(modelClass: Class<T>): T {
-                val appContainer = AppContainer()
-                return PostListViewModel(appContainer.postRepository) as T
-            }
-        }
-    )
+    viewModel: PostListViewModel = viewModel(factory = postViewModelFactory { PostListViewModel(it) })
 ) {
     val uiState = viewModel.uiState
     val posts = uiState.posts

From 924862d8bbe497dc53bb29deee4a1f89de7a3c26 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 14:54:48 +0900
Subject: [PATCH 12/17] =?UTF-8?q?docs:=20ViewModel=20=EC=88=98=EB=8F=99=20?=
 =?UTF-8?q?=EC=A3=BC=EC=9E=85=20=EA=B4=80=EB=A0=A8=20=EC=A3=BC=EC=84=9D=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

각 화면(Screen)에서 `ViewModel`을 주입받는 부분에 `postViewModelFactory`를 통해 `Repository`가 수동으로 주입된다는 내용의 주석을 추가했습니다.

*   `PostCreateScreen.kt`
*   `PostDetailScreen.kt`
*   `PostEditScreen.kt`
*   `PostViewModelFactory.kt`
---
 .../kuit6_android_api/ui/post/screen/PostCreateScreen.kt    | 1 +
 .../kuit6_android_api/ui/post/screen/PostDetailScreen.kt    | 1 +
 .../kuit6_android_api/ui/post/screen/PostEditScreen.kt      | 1 +
 .../ui/post/viewmodel/PostViewModelFactory.kt               | 6 +++++-
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 2f3a1d2..48997f1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -62,6 +62,7 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
+    // Repository는 postViewModelFactory를 통해 수동 주입(App Container)됩니다
     viewModel: PostCreateViewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
index 856a727..5a83bde 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt
@@ -57,6 +57,7 @@ fun PostDetailScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onEditClick: (Long) -> Unit = {},
+    // Repository는 postViewModelFactory를 통해 수동 주입(App Container)됩니다
     viewModel: PostDetailViewModel = viewModel(factory = postViewModelFactory { PostDetailViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
index 82c3848..4978458 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt
@@ -62,6 +62,7 @@ fun PostEditScreen(
     postId: Long,
     onNavigateBack: () -> Unit,
     onPostUpdated: () -> Unit,
+    // Repository는 postViewModelFactory를 통해 수동 주입(App Container)됩니다
     viewModel: PostEditViewModel = viewModel(factory = postViewModelFactory { PostEditViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
index 6dcdcfc..96bc814 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt
@@ -7,7 +7,11 @@ import androidx.lifecycle.viewmodel.viewModelFactory
 import com.example.kuit6_android_api.App
 import com.example.kuit6_android_api.data.repository.PostRepository
 
-
+/**
+ * Repository 패턴을 위해 Repository를 ViewModel에 파라미터로 전달하는 Factory
+ * Repository는 수동 주입(App Container)을 통해 가져오며,
+ * ViewModel에 파라미터를 전달하기 위해 Factory 패턴을 사용합니다.
+ */
 inline fun <reified VM : ViewModel> postViewModelFactory(
     crossinline create: (PostRepository) -> VM
 ): ViewModelProvider.Factory = viewModelFactory {

From f8173336318ced2f3effe64ce20afb0e267610e7 Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 16:13:13 +0900
Subject: [PATCH 13/17] =?UTF-8?q?refactor:=20ViewModel=20=EB=B6=84?=
 =?UTF-8?q?=EB=A6=AC=20=EB=B0=8F=20Repository=20=ED=8C=A8=ED=84=B4=20?=
 =?UTF-8?q?=EC=A0=81=EC=9A=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존의 단일 `PostViewModel`을 기능별로 분리하여 각 화면의 역할을 명확히 했습니다. 또한, `PostRepository`를 도입하여 데이터 소스를 추상화하고 ViewModel과 데이터 계층 간의 의존성을 분리했습니다.

*   **Repository 추가 및 수정**:
    *   `PostRepository`: 게시글 CRUD(생성, 상세 조회, 수정, 삭제) 및 이미지 업로드 기능을 위한 메서드를 추가했습니다.
    *   `PostRepositoryImpl`: 추가된 인터페이스 메서드들을 구현했습니다.

*   **ViewModel 분리**:
    *   `PostViewModel`을 삭제하고, 기능에 따라 아래의 ViewModel들로 분리했습니다.
    *   `PostCreateViewModel`: 게시글 생성 및 이미지 업로드 기능을 담당합니다.
    *   `PostDetailViewModel`: 게시글 상세 조회 및 삭제 기능을 담당합니다.
    *   `PostEditViewModel`: 게시글 수정, 상세 조회 및 이미지 업로드 기능을 담당합니다.

*   **의존성 주입(DI)**:
    *   `AppContainer`: `PostRepository`의 인스턴스를 생성하고 관리하여 ViewModel에 주입하는 역할을 합니다.
    *   `NavGraph`: 각 화면(`PostCreateScreen`, `PostDetailScreen`, `PostEditScreen`)에서 `AppContainer`를 통해 해당 화면에 맞는 ViewModel을 주입받도록 수정했습니다.
---
 BRANCH_DIFFERENCES.md                         | 300 ++++++++++++++++++
 PROJECT_CONTEXT.md                            |  69 ++++
 .../ui/post/screen/PostCreateScreen.kt        |   2 +-
 .../ui/post/viewmodel/PostCreateViewModel.kt  |   4 +-
 4 files changed, 372 insertions(+), 3 deletions(-)
 create mode 100644 BRANCH_DIFFERENCES.md
 create mode 100644 PROJECT_CONTEXT.md

diff --git a/BRANCH_DIFFERENCES.md b/BRANCH_DIFFERENCES.md
new file mode 100644
index 0000000..13fe180
--- /dev/null
+++ b/BRANCH_DIFFERENCES.md
@@ -0,0 +1,300 @@
+# practice-only 브랜치와 JeongIlhyuk/week7 브랜치 차이점 정리
+
+## 변경 요약
+- **추가된 파일**: 4개
+- **수정된 파일**: 10개
+- **삭제된 파일**: 1개
+
+---
+
+## 1. 추가된 파일 (A)
+
+### 1.1 `app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt`
+**새로 생성된 파일**
+- 의존성 주입을 위한 AppContainer 클래스 추가
+- ApiService와 PostRepository를 한 곳에서 관리
+- Repository 패턴 구현을 위한 의존성 관리
+
+**주요 내용:**
+```kotlin
+class AppContainer {
+    val apiService: ApiService = RetrofitClient.apiService
+    val postRepository: PostRepository = PostRepositoryImpl(apiService)
+}
+```
+
+### 1.2 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt`
+**새로 생성된 파일**
+- PostViewModel을 기능별로 분리한 ViewModel 중 하나
+- 게시글 생성 관련 로직 담당
+- PostCreateUiState를 통한 상태 관리
+
+**주요 기능:**
+- `createPost()`: 게시글 생성
+- `uploadImage()`: 이미지 업로드
+- `clearUploadedImageUrl()`: 업로드된 이미지 URL 초기화
+
+### 1.3 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostDetailViewModel.kt`
+**새로 생성된 파일**
+- 게시글 상세 조회 및 삭제 관련 ViewModel
+- PostDetailUiState를 통한 상태 관리
+
+**주요 기능:**
+- `getPostDetail()`: 게시글 상세 조회
+- `deletePost()`: 게시글 삭제
+
+### 1.4 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostEditViewModel.kt`
+**새로 생성된 파일**
+- 게시글 수정 관련 ViewModel
+- PostEditUiState를 통한 상태 관리
+
+**주요 기능:**
+- `getPostDetail()`: 게시글 상세 조회
+- `updatePost()`: 게시글 수정
+- `uploadImage()`: 이미지 업로드
+- `clearUploadedImageUrl()`: 업로드된 이미지 URL 초기화
+
+---
+
+## 2. 삭제된 파일 (D)
+
+### 2.1 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModel.kt`
+**삭제된 파일**
+- 기존의 통합 PostViewModel이 기능별로 분리됨
+- PostCreateViewModel, PostDetailViewModel, PostEditViewModel로 분리
+- ApiService를 직접 참조하던 구조에서 Repository 패턴으로 변경
+
+---
+
+## 3. 수정된 파일 (M)
+
+### 3.1 `app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt`
+
+**변경 사항:**
+1. **Import 추가:**
+   - `PostCreateRequest` 추가
+   - `okhttp3.MultipartBody` 추가
+
+2. **인터페이스 포맷팅:**
+   - `PostRepository{` → `PostRepository {` (공백 추가)
+
+3. **메서드 추가:**
+   - `getPostDetail(postId: Long): Result<PostResponse>` - 게시글 상세 조회
+   - `createPost(author, title, content, imageUrl): Result<PostResponse>` - 게시글 생성
+   - `updatePost(postId, title, content, imageUrl): Result<PostResponse>` - 게시글 수정
+   - `deletePost(postId: Long): Result<Unit>` - 게시글 삭제
+   - `uploadImage(file: MultipartBody.Part): Result<String>` - 이미지 업로드
+
+4. **파일 끝 개행 추가**
+
+### 3.2 `app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepositoryImpl.kt`
+
+**변경 사항:**
+1. **Import 추가:**
+   - `PostCreateRequest` 추가
+   - `BaseResponse` 추가
+   - `okhttp3.MultipartBody` 추가
+
+2. **클래스 포맷팅:**
+   - `PostRepositoryImpl (` → `PostRepositoryImpl(` (공백 제거)
+   - `): PostRepository {` → `) : PostRepository {` (공백 추가)
+
+3. **getPosts() 메서드 개선:**
+   - 반환 타입 명시: `BaseResponse<List<PostResponse>>`
+   - 에러 메시지 변경: "게시긆 불러오기 실패" → "게시글 목록 조회 실패"
+   - 포맷팅 개선 (공백 추가)
+
+4. **새로운 메서드 구현 추가:**
+   - `getPostDetail()`: 게시글 상세 조회 구현
+   - `createPost()`: 게시글 생성 구현
+   - `updatePost()`: 게시글 수정 구현
+   - `deletePost()`: 게시글 삭제 구현
+   - `uploadImage()`: 이미지 업로드 구현
+
+5. **파일 끝 개행 추가**
+
+### 3.3 `app/src/main/java/com/example/kuit6_android_api/ui/navigation/NavGraph.kt`
+
+**변경 사항:**
+1. **Import 추가:**
+   - `PostCreateViewModel` 추가
+   - `PostDetailViewModel` 추가
+   - `PostEditViewModel` 추가
+
+2. **PostDetailScreen에 ViewModel 주입:**
+   ```kotlin
+   viewModel = viewModel(factory = postViewModelFactory { PostDetailViewModel(it) })
+   ```
+
+3. **PostCreateScreen에 ViewModel 주입:**
+   ```kotlin
+   viewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) })
+   ```
+
+4. **PostEditScreen에 ViewModel 주입:**
+   ```kotlin
+   viewModel = viewModel(factory = postViewModelFactory { PostEditViewModel(it) })
+   ```
+
+### 3.4 `app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt`
+
+**변경 사항:**
+1. **Import 변경:**
+   - `PostViewModel` → `PostCreateViewModel`
+   - `postViewModelFactory` 추가
+
+2. **ViewModel 타입 변경:**
+   - `PostViewModel` → `PostCreateViewModel`
+   - Factory를 통한 의존성 주입 추가
+
+3. **상태 접근 방식 변경:**
+   - `viewModel.isUploading` → `uiState.isUploading`
+   - `viewModel.uploadedImageUrl` → `uiState.uploadedImageUrl`
+   - `val uiState = viewModel.uiState` 추가
+
+4. **주석 추가:**
+   - Repository 주입 방식에 대한 설명 주석 추가
+
+### 3.5 `app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostDetailScreen.kt`
+
+**변경 사항:**
+1. **Import 변경:**
+   - `PostViewModel` → `PostDetailViewModel`
+   - `postViewModelFactory` 추가
+
+2. **ViewModel 타입 변경:**
+   - `PostViewModel` → `PostDetailViewModel`
+   - Factory를 통한 의존성 주입 추가
+
+3. **상태 접근 방식 변경:**
+   - `viewModel.postDetail` → `uiState.postDetail`
+   - `val uiState = viewModel.uiState` 추가
+
+4. **LaunchedEffect 주석 해제:**
+   - `viewModel.getPostDetail(postId)` 호출 활성화
+
+5. **주석 추가:**
+   - Repository 주입 방식에 대한 설명 주석 추가
+
+### 3.6 `app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostEditScreen.kt`
+
+**변경 사항:**
+1. **Import 변경:**
+   - `PostViewModel` → `PostEditViewModel`
+   - `postViewModelFactory` 추가
+
+2. **ViewModel 타입 변경:**
+   - `PostViewModel` → `PostEditViewModel`
+   - Factory를 통한 의존성 주입 추가
+
+3. **상태 접근 방식 변경:**
+   - `viewModel.postDetail` → `uiState.postDetail`
+   - `viewModel.uploadedImageUrl` → `uiState.uploadedImageUrl`
+   - `viewModel.isUploading` → `uiState.isUploading`
+   - `val uiState = viewModel.uiState` 추가
+
+4. **주석 추가:**
+   - Repository 주입 방식에 대한 설명 주석 추가
+
+### 3.7 `app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt`
+
+**변경 사항:**
+1. **Import 변경:**
+   - `PostViewModel` 제거
+   - `PostListUiState` 제거
+   - `collectAsState` 제거
+   - `DisposableEffect`, `LocalLifecycleOwner`, `Lifecycle`, `LifecycleEventObserver` 추가
+   - `postViewModelFactory` 추가
+
+2. **ViewModel 주입 방식 변경:**
+   - Factory를 통한 의존성 주입 추가
+   - 기본값으로 ViewModel 생성
+
+3. **상태 관리 방식 변경:**
+   - `StateFlow` 기반 → `mutableStateOf` 기반으로 변경
+   - `collectAsState()` 제거, 직접 `uiState` 접근
+
+4. **Lifecycle 관리 추가:**
+   - `DisposableEffect`를 사용한 Lifecycle 이벤트 감지
+   - `ON_RESUME` 이벤트 시 자동 새로고침
+
+5. **UI 구조 단순화:**
+   - `PostListUiState`의 sealed class 구조 제거
+   - Loading, Success, Error 상태 분기 제거
+   - 단순한 LazyColumn으로 변경
+
+6. **LaunchedEffect 추가:**
+   - 초기 로드 시 `viewModel.refresh()` 호출
+
+### 3.8 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt`
+
+**변경 사항:**
+1. **Import 변경:**
+   - `PostListUiState` 제거 (파일 내부로 이동)
+   - `MutableStateFlow`, `StateFlow`, `asStateFlow` 제거
+   - `mutableStateOf`, `getValue`, `setValue` 추가
+   - `PostResponse` 추가
+
+2. **상태 관리 방식 변경:**
+   - `StateFlow` 기반 → `mutableStateOf` 기반으로 변경
+   - `_uiState`와 `uiState` 분리 구조 제거
+
+3. **PostListUiState 정의 변경:**
+   - sealed class에서 data class로 변경
+   - Loading, Success, Error 상태 제거
+   - 단순히 `posts: List<PostResponse>`만 포함
+
+4. **생성자 파라미터 이름 변경:**
+   - `postRepository` → `repository`
+
+5. **초기화 로직 변경:**
+   - `init` 블록 제거
+   - `loadPosts()` 메서드 제거
+   - `refresh()` 메서드로 통합
+
+6. **에러 처리 단순화:**
+   - Error 상태 제거, 실패 시 빈 리스트로 설정
+
+7. **파일 끝 개행 추가**
+
+### 3.9 `app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostViewModelFactory.kt`
+
+**변경 사항:**
+1. **주석 추가:**
+   - Repository 패턴과 수동 주입(App Container)에 대한 설명 주석 추가
+   - Factory 패턴 사용 목적 설명
+
+### 3.10 `gradle/libs.versions.toml`
+
+**변경 사항:**
+1. **AGP 버전 업데이트:**
+   - `agp = "8.13.0"` → `agp = "8.13.1"`
+
+---
+
+## 주요 아키텍처 변경 사항
+
+### 1. Repository 패턴 도입
+- ApiService를 직접 참조하던 구조에서 Repository를 통한 추상화
+- 의존성 주입을 통한 테스트 용이성 향상
+
+### 2. ViewModel 분리
+- 단일 `PostViewModel`을 기능별로 분리:
+  - `PostListViewModel`: 목록 조회
+  - `PostCreateViewModel`: 게시글 생성
+  - `PostDetailViewModel`: 상세 조회 및 삭제
+  - `PostEditViewModel`: 게시글 수정
+
+### 3. 상태 관리 방식 변경
+- `StateFlow` 기반 → `mutableStateOf` 기반
+- Sealed class 기반 상태 → Data class 기반 상태
+- UI 상태를 UiState data class로 명확히 정의
+
+### 4. 의존성 주입 구조
+- `AppContainer`를 통한 중앙 집중식 의존성 관리
+- Factory 패턴을 통한 ViewModel 생성 시 Repository 주입
+
+### 5. Lifecycle 관리 개선
+- `DisposableEffect`를 사용한 화면 재진입 시 자동 새로고침
+- Lifecycle 이벤트 기반 데이터 갱신
+
diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
new file mode 100644
index 0000000..5e151ac
--- /dev/null
+++ b/PROJECT_CONTEXT.md
@@ -0,0 +1,69 @@
+# 프로젝트 컨텍스트 및 개발 가이드라인
+
+## 브랜치 구조
+
+### practice-only 브랜치
+- **의미**: 미션 반영 전 상태
+- **내용**: 강의자가 실습한 코드를 그대로 구현한 것
+- **역할**: 기준점(baseline)으로 사용
+- **중요**: 이 브랜치의 코드 스타일과 패턴을 크게 벗어나지 않아야 함
+
+### JeongIlhyuk/week7 브랜치
+- **의미**: 미션 반영 후 상태
+- **내용**: 미션 요구사항을 반영한 코드
+- **역할**: 미션 완료 버전
+
+---
+
+## 미션 요구사항 (체크리스트)
+
+- [x] 수동 주입(App Container) 구현
+- [x] Repository 패턴 사용
+- [x] ViewModel 분리
+    - PostEditViewModel
+    - PostDetailViewModel (삭제까지 같이 하시면 됩니다)
+    - PostCreateViewModel
+- [x] UiState 구현
+- [x] PostViewModel 삭제
+- [x] PostListViewModel의 refresh 함수를 메인화면에서 sideEffect로 항상 실행시키기
+
+---
+
+## 개발 원칙
+
+### ⚠️ 중요 사항
+1. **미션 요구사항에 벗어나는 불필요한 변경 금지**
+   - 미션에서 요구하지 않은 변경사항은 만들지 않기
+   - 예: StateFlow → mutableStateOf 변경은 미션 요구사항이 아님 (단순히 선택된 방식)
+
+2. **practice-only 브랜치의 코드 스타일 유지**
+   - 강의자가 실습한 코드의 패턴과 스타일을 존중
+   - 불필요한 리팩토링이나 스타일 변경 지양
+
+3. **변경사항 검증**
+   - 모든 변경사항이 미션 요구사항과 직접적으로 연관되어 있는지 확인
+   - practice-only 브랜치와 비교하여 불필요한 차이점이 없는지 확인
+
+---
+
+## 브랜치 비교 시 주의사항
+
+### 비교 방법
+```bash
+# practice-only (미션 전) vs JeongIlhyuk/week7 (미션 후)
+git diff practice-only JeongIlhyuk/week7
+```
+
+### 확인해야 할 사항
+1. 변경사항이 미션 요구사항과 직접 연관이 있는가?
+2. practice-only의 코드 스타일을 크게 벗어나지 않는가?
+3. 불필요한 리팩토링이나 개선이 포함되어 있지 않은가?
+
+---
+
+## 참고사항
+
+- practice-only 브랜치는 강의자의 실습 코드이므로, 이를 기준으로 미션만 반영해야 함
+- 미션 요구사항 외의 "개선"이나 "최적화"는 지양
+- 코드 스타일, 네이밍, 구조는 practice-only 브랜치를 따르는 것을 원칙으로 함
+
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
index 48997f1..e7cc4c1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt
@@ -62,7 +62,7 @@ import kotlinx.coroutines.launch
 fun PostCreateScreen(
     onNavigateBack: () -> Unit,
     onPostCreated: () -> Unit,
-    // Repository는 postViewModelFactory를 통해 수동 주입(App Container)됩니다
+    // Repository는 postViewModelFactory를 통해 수동 주입(App Container)
     viewModel: PostCreateViewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) }),
     snackBarState: SnackbarHostState
 ) {
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index 34eeb67..a0c3acf 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -15,8 +15,7 @@ import okhttp3.MultipartBody
 import okhttp3.RequestBody.Companion.asRequestBody
 
 //PostViewModel을 PostListViewModel, PostCreateViewModel, PostDetailViewModel, PostEditViewModel로 분리
-//uiState를 통해 상태를 한 번에 모아 처리
-data class PostCreateUiState(
+data class PostCreateUiState( //uiState를 통해 상태를 한 번에 모아 처리
     val uploadedImageUrl: String? = null,
     val isUploading: Boolean = false
 )
@@ -24,6 +23,7 @@ data class PostCreateUiState(
 class PostCreateViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
+    //st
     var uiState by mutableStateOf(PostCreateUiState())
         private set
 

From 25834c3325dfa814b2ffe999a163ae550a0f8f3b Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 16:20:54 +0900
Subject: [PATCH 14/17] =?UTF-8?q?refactor:=20StateFlow=20=EC=A0=81?=
 =?UTF-8?q?=EC=9A=A9=20=EB=B0=8F=20UI=20=EC=83=81=ED=83=9C=20=EA=B4=80?=
 =?UTF-8?q?=EB=A6=AC=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

`PostListViewModel`에서 `StateFlow`를 사용하여 UI 상태를 관리하도록 변경하고, `PostListScreen`에서는 로딩, 성공, 에러 상태에 따라 다른 UI를 표시하도록 개선했습니다.

*   **PostListViewModel.kt**:
    *   기존 `mutableStateOf`로 관리하던 `uiState`를 `StateFlow`로 변경했습니다.
    *   게시글 목록 조회 결과에 따라 `Loading`, `Success`, `Error` 상태를 갖는 `PostListUiState`를 `emit`하도록 수정했습니다.
    *   게시글을 불러오는 `loadPosts()` 함수를 추가하고, `refresh()`에서 이를 호출하도록 변경했습니다.

*   **PostListScreen.kt**:
    *   `collectAsState()`를 사용하여 `ViewModel`의 `uiState`를 구독하도록 변경했습니다.
    *   `when` 문을 사용하여 `PostListUiState`의 상태(Loading, Success, Error)에 따라 `CircularProgressIndicator` 또는 `LazyColumn`을 표시하도록 UI 로직을 수정했습니다.
    *   기존 `DisposableEffect`를 사용한 생명주기 기반의 새로고침 로직을 제거하고, `LaunchedEffect`를 사용하여 화면 진입 시 데이터를 불러오도록 단순화했습니다.
---
 .../ui/post/screen/PostListScreen.kt          | 61 ++++++++-----------
 .../ui/post/viewmodel/PostListViewModel.kt    | 31 +++++-----
 2 files changed, 44 insertions(+), 48 deletions(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 43832c6..1d8ab8f 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -18,16 +18,14 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.Lifecycle
-import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.kuit6_android_api.ui.post.component.PostItem
+import com.example.kuit6_android_api.ui.post.state.PostListUiState
 import com.example.kuit6_android_api.ui.post.viewmodel.PostListViewModel
 import com.example.kuit6_android_api.ui.post.viewmodel.postViewModelFactory
 
@@ -38,24 +36,9 @@ fun PostListScreen(
     onCreatePostClick: () -> Unit,
     viewModel: PostListViewModel = viewModel(factory = postViewModelFactory { PostListViewModel(it) })
 ) {
-    val uiState = viewModel.uiState
-    val posts = uiState.posts
-    val lifecycleOwner = LocalLifecycleOwner.current
-
-    DisposableEffect(lifecycleOwner) {//lifecycleOwner가 변경될 때마다 실행
-        //LaunchedEffect와 달리 화면이 처음 나타날 때뿐만 아니라 다시 나타날 때도 실행
-        val observer = LifecycleEventObserver { _, event -> //lifecycle 이벤트를 감지하는 옵저버
-            //event로 상태 변화 받음
-            if (event == Lifecycle.Event.ON_RESUME) {//화면이 다시 활성화되면
-                viewModel.refresh()
-            }
-        }
-        lifecycleOwner.lifecycle.addObserver(observer)//화면 상태가 바뀔 때마다 알림을 받기 위해 옵저버 등록
-        onDispose {//화면이 사라질 때
-            lifecycleOwner.lifecycle.removeObserver(observer)
-        }
-    }
+    val uiState by viewModel.uiState.collectAsState()
 
+    // 미션 요구사항: refresh 함수를 메인화면에서 sideEffect로 항상 실행시키기
     LaunchedEffect(Unit) {
         viewModel.refresh()
     }
@@ -72,19 +55,29 @@ fun PostListScreen(
             }
         }
     ) { paddingValues ->
-        LazyColumn(
-            modifier = Modifier
-                .fillMaxSize()
-                .padding(paddingValues)
-                .background(MaterialTheme.colorScheme.background),
-            contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
-            verticalArrangement = Arrangement.spacedBy(16.dp)
-        ) {
-            items(posts) { post ->
-                PostItem(
-                    post = post,
-                    onClick = { onPostClick(post.id) }
-                )
+        when (uiState) {
+            is PostListUiState.Loading -> {
+                CircularProgressIndicator()
+            }
+            is PostListUiState.Success -> {
+                LazyColumn(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(paddingValues)
+                        .background(MaterialTheme.colorScheme.background),
+                    contentPadding = PaddingValues(horizontal = 16.dp, vertical = 12.dp),
+                    verticalArrangement = Arrangement.spacedBy(16.dp)
+                ) {
+                    items((uiState as PostListUiState.Success).posts) { post ->
+                        PostItem(
+                            post = post,
+                            onClick = { onPostClick(post.id) }
+                        )
+                    }
+                }
+            }
+            is PostListUiState.Error -> {
+                // Error 상태 처리 (practice-only와 동일하게 빈 상태)
             }
         }
     }
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
index 7040496..117499b 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostListViewModel.kt
@@ -1,33 +1,36 @@
 package com.example.kuit6_android_api.ui.post.viewmodel
 
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.kuit6_android_api.data.repository.PostRepository
-import com.example.kuit6_android_api.data.model.response.PostResponse
+import com.example.kuit6_android_api.ui.post.state.PostListUiState
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 
-data class PostListUiState(
-    val posts: List<PostResponse> = emptyList()
-)
-
 class PostListViewModel(
     private val repository: PostRepository
 ) : ViewModel() {
-    var uiState by mutableStateOf(PostListUiState())
-        private set
+    private val _uiState = MutableStateFlow<PostListUiState>(PostListUiState.Loading)
+    val uiState: StateFlow<PostListUiState> = _uiState.asStateFlow()
 
-    fun refresh() {
+    private fun loadPosts() {
         viewModelScope.launch {
+            _uiState.value = PostListUiState.Loading
             repository.getPosts()
                 .onSuccess { posts ->
-                    uiState = uiState.copy(posts = posts)
+                    _uiState.value = PostListUiState.Success(posts)
                 }
-                .onFailure {
-                    uiState = uiState.copy(posts = emptyList())
+                .onFailure { error ->
+                    _uiState.value = PostListUiState.Error(
+                        message = error.message ?: "error"
+                    )
                 }
         }
     }
+
+    fun refresh() {
+        loadPosts()
+    }
 }

From e64229ac86b73a014c206d55328d81e99fd8d61f Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 17:05:34 +0900
Subject: [PATCH 15/17] =?UTF-8?q?refactor:=20AppContainer=20=ED=8C=A8?=
 =?UTF-8?q?=ED=82=A4=EC=A7=80=20=EA=B2=BD=EB=A1=9C=20=EB=B3=80=EA=B2=BD=20?=
 =?UTF-8?q?=EB=B0=8F=20=EC=9D=98=EC=A1=B4=EC=84=B1=20=EC=A3=BC=EC=9E=85=20?=
 =?UTF-8?q?=EA=B5=AC=EC=A1=B0=20=EA=B0=9C=EC=84=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

DI 컨테이너인 `AppContainer`의 패키지 경로를 `di`에서 `data/di`로 변경하여 데이터 계층의 일부임을 명확히 했습니다. 또한, `lazy` 초기화를 사용하여 `AppContainer` 내에서 `ApiService`와 `PostRepository`의 인스턴스 생성을 최적화했습니다.

*   **`AppContainer` 패키지 이동**:
    *   기존 `di/AppContainer.kt` 파일을 `data/di/AppContainer.kt`로 이동했습니다.
*   **`lazy` 초기화 적용**:
    *   `AppContainer` 내의 `apiService`와 `postRepository` 프로퍼티를 `lazy`를 사용하여 초기화하도록 수정했습니다. 이를 통해 해당 인스턴스들이 실제로 처음 사용될 때 생성되도록 변경했습니다.
*   **`PostRepository` 인터페이스 확장**:
    *   `getPostDetail`, `createPost`, `deletePost`, `editPost` 함수를 추가하여 게시글의 상세 조회 및 CRUD 기능을 위한 메서드를 정의했습니다.
---
 BRANCH_DIFFERENCES.md                         | 32 +++++++++++--------
 .../kuit6_android_api/data/di/AppContainer.kt |  6 +++-
 .../data/repository/PostRepository.kt         |  1 +
 .../kuit6_android_api/di/AppContainer.kt      | 14 --------
 .../ui/post/viewmodel/PostCreateViewModel.kt  |  1 +
 5 files changed, 25 insertions(+), 29 deletions(-)
 delete mode 100644 app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt

diff --git a/BRANCH_DIFFERENCES.md b/BRANCH_DIFFERENCES.md
index 13fe180..b86a660 100644
--- a/BRANCH_DIFFERENCES.md
+++ b/BRANCH_DIFFERENCES.md
@@ -121,20 +121,23 @@ class AppContainer {
    - `PostDetailViewModel` 추가
    - `PostEditViewModel` 추가
 
-2. **PostDetailScreen에 ViewModel 주입:**
+2. **PostDetailScreen에서 Factory를 통해 Repository를 ViewModel에 주입:**
    ```kotlin
    viewModel = viewModel(factory = postViewModelFactory { PostDetailViewModel(it) })
    ```
+   - Factory가 AppContainer에서 Repository를 가져와 ViewModel 생성자에 전달
 
-3. **PostCreateScreen에 ViewModel 주입:**
+3. **PostCreateScreen에서 Factory를 통해 Repository를 ViewModel에 주입:**
    ```kotlin
    viewModel = viewModel(factory = postViewModelFactory { PostCreateViewModel(it) })
    ```
+   - Factory가 AppContainer에서 Repository를 가져와 ViewModel 생성자에 전달
 
-4. **PostEditScreen에 ViewModel 주입:**
+4. **PostEditScreen에서 Factory를 통해 Repository를 ViewModel에 주입:**
    ```kotlin
    viewModel = viewModel(factory = postViewModelFactory { PostEditViewModel(it) })
    ```
+   - Factory가 AppContainer에서 Repository를 가져와 ViewModel 생성자에 전달
 
 ### 3.4 `app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostCreateScreen.kt`
 
@@ -145,7 +148,7 @@ class AppContainer {
 
 2. **ViewModel 타입 변경:**
    - `PostViewModel` → `PostCreateViewModel`
-   - Factory를 통한 의존성 주입 추가
+   - Factory를 통해 Repository를 ViewModel에 주입
 
 3. **상태 접근 방식 변경:**
    - `viewModel.isUploading` → `uiState.isUploading`
@@ -164,7 +167,7 @@ class AppContainer {
 
 2. **ViewModel 타입 변경:**
    - `PostViewModel` → `PostDetailViewModel`
-   - Factory를 통한 의존성 주입 추가
+   - Factory를 통해 Repository를 ViewModel에 주입
 
 3. **상태 접근 방식 변경:**
    - `viewModel.postDetail` → `uiState.postDetail`
@@ -185,7 +188,7 @@ class AppContainer {
 
 2. **ViewModel 타입 변경:**
    - `PostViewModel` → `PostEditViewModel`
-   - Factory를 통한 의존성 주입 추가
+   - Factory를 통해 Repository를 ViewModel에 주입
 
 3. **상태 접근 방식 변경:**
    - `viewModel.postDetail` → `uiState.postDetail`
@@ -206,8 +209,8 @@ class AppContainer {
    - `DisposableEffect`, `LocalLifecycleOwner`, `Lifecycle`, `LifecycleEventObserver` 추가
    - `postViewModelFactory` 추가
 
-2. **ViewModel 주입 방식 변경:**
-   - Factory를 통한 의존성 주입 추가
+2. **Factory를 통한 Repository 주입 추가:**
+   - Factory가 AppContainer에서 Repository를 가져와 ViewModel 생성자에 전달
    - 기본값으로 ViewModel 생성
 
 3. **상태 관리 방식 변경:**
@@ -285,16 +288,17 @@ class AppContainer {
   - `PostDetailViewModel`: 상세 조회 및 삭제
   - `PostEditViewModel`: 게시글 수정
 
-### 3. 상태 관리 방식 변경
-- `StateFlow` 기반 → `mutableStateOf` 기반
-- Sealed class 기반 상태 → Data class 기반 상태
-- UI 상태를 UiState data class로 명확히 정의
+### 3. UiState 구현
+- 각 ViewModel에 UiState data class 추가 (PostCreateUiState, PostDetailUiState, PostEditUiState)
+- PostListViewModel은 practice-only와 동일하게 StateFlow + sealed class 기반 PostListUiState 유지
+- UI 상태를 UiState로 명확히 정의하여 상태 관리 일관성 향상
 
 ### 4. 의존성 주입 구조
 - `AppContainer`를 통한 중앙 집중식 의존성 관리
 - Factory 패턴을 통한 ViewModel 생성 시 Repository 주입
+- ViewModel이 Repository를 파라미터로 받아 사용 (의존성 주입)
 
 ### 5. Lifecycle 관리 개선
-- `DisposableEffect`를 사용한 화면 재진입 시 자동 새로고침
-- Lifecycle 이벤트 기반 데이터 갱신
+- `LaunchedEffect`를 사용한 초기 로드 시 refresh 함수 실행 (미션 요구사항)
+- PostListScreen에서 화면 진입 시 자동으로 데이터 새로고침
 
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
index cf4ecc4..13ce606 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/di/AppContainer.kt
@@ -5,12 +5,16 @@ import com.example.kuit6_android_api.data.api.RetrofitClient
 import com.example.kuit6_android_api.data.repository.PostRepository
 import com.example.kuit6_android_api.data.repository.PostRepositoryImpl
 
-class AppContainer {
+class AppContainer { //모든 의존성을 AppContainer 한 곳에서 관리하게 함
     private val apiService: ApiService by lazy{
         RetrofitClient.apiService
     }
 
     val postRepository: PostRepository by lazy{
+    //ApiService를 AppContainer에서 한 번만 가져 와 Repository에 주입
+
+    // 원래:뷰모델 -> ApiService 직접 참조
+    // 현재:뷰모델 -> Repository -> ApiService Repository 거쳐 참조
         PostRepositoryImpl(apiService)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
index 763366b..0b045b9 100644
--- a/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/data/repository/PostRepository.kt
@@ -6,6 +6,7 @@ import okhttp3.MultipartBody
 
 interface PostRepository {
     suspend fun getPosts(): Result<List<PostResponse>>
+    //레포지토리 패턴을 사용하기 위해 다음 함수들을 추가
     suspend fun getPostDetail(postId: Long): Result<PostResponse>
     suspend fun createPost(
         author: String,
diff --git a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt b/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
deleted file mode 100644
index a8d0d3d..0000000
--- a/app/src/main/java/com/example/kuit6_android_api/di/AppContainer.kt
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.example.kuit6_android_api.di
-
-import com.example.kuit6_android_api.data.api.ApiService
-import com.example.kuit6_android_api.data.api.RetrofitClient
-import com.example.kuit6_android_api.data.repository.PostRepository
-import com.example.kuit6_android_api.data.repository.PostRepositoryImpl
-
-class AppContainer {
-    //모든 의존성을 AppContainer 한 곳에서 관리하게 함
-    val apiService: ApiService = RetrofitClient.apiService
-    //ApiService를 AppContainer에서 한 번만 가져 와 Repository에 주입
-    // 원래 ApiService를 직접 참조하던 ViewModel들이 Repository를 참조
-    val postRepository: PostRepository = PostRepositoryImpl(apiService)
-}
diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
index a0c3acf..de192e1 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/viewmodel/PostCreateViewModel.kt
@@ -22,6 +22,7 @@ data class PostCreateUiState( //uiState를 통해 상태를 한 번에 모아 
 
 class PostCreateViewModel(
     private val repository: PostRepository
+    // 의존성 주입:뷰모델의 파라미터로 Repository를 전달하는 것
 ) : ViewModel() {
     //st
     var uiState by mutableStateOf(PostCreateUiState())

From 874812ce38a61b451791bf2706e969b13a24827f Mon Sep 17 00:00:00 2001
From: Zach <dnfjddk2@gmail.com>
Date: Thu, 13 Nov 2025 17:12:24 +0900
Subject: [PATCH 16/17] =?UTF-8?q?docs:=20PostListScreen=EC=97=90=20?=
 =?UTF-8?q?=EC=A3=BC=EC=84=9D=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

`PostListScreen`의 `LaunchedEffect` 블록에 Side Effect에 대한 설명을 주석으로 추가하여 코드의 가독성을 높였습니다.
---
 .../example/kuit6_android_api/ui/post/screen/PostListScreen.kt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
index 1d8ab8f..236f8cb 100644
--- a/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
+++ b/app/src/main/java/com/example/kuit6_android_api/ui/post/screen/PostListScreen.kt
@@ -38,8 +38,9 @@ fun PostListScreen(
 ) {
     val uiState by viewModel.uiState.collectAsState()
 
-    // 미션 요구사항: refresh 함수를 메인화면에서 sideEffect로 항상 실행시키기
     LaunchedEffect(Unit) {
+        // Side Effect:UI 렌더링 외의 작업
+        // UI를 직접 그리지 않고 변화하게 했으므로 Side Effect
         viewModel.refresh()
     }
 

From 8e1e0353230ef9adcc63e04e61c7245055cb29a4 Mon Sep 17 00:00:00 2001
From: Chae Minji <162430621+alswlekk@users.noreply.github.com>
Date: Fri, 14 Nov 2025 11:00:20 +0900
Subject: [PATCH 17/17] Add configuration for automatic reviews and exclusions

---
 .coderabbit.yaml | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 .coderabbit.yaml

diff --git a/.coderabbit.yaml b/.coderabbit.yaml
new file mode 100644
index 0000000..24636cb
--- /dev/null
+++ b/.coderabbit.yaml
@@ -0,0 +1,34 @@
+version: 1
+
+reviews:
+  auto_review: true              # 자동 리뷰 활성화
+  review_status: true            # 체크 메시지 표시
+  max_review_comments: 50
+
+  # 모든 브랜치 PR에 대해 자동으로 리뷰
+  triggers:
+    pull_request: true           # PR 생성 시 자동 리뷰
+    pull_request_branches:       # 어떤 브랜치든지 허용
+      include:
+        - "*"                    # 모든 브랜치
+    push: false
+    pull_request_review: false
+
+style:
+  tone: professional
+  detail_level: medium
+  include_line_comments: true
+
+exclude:
+  paths:
+    - "*.md"
+    - "*.png"
+    - "*.jpg"
+    - "*.gif"
+    - "*.svg"
+    - "build/**"
+    - "gradle/**"
+
+model:
+  provider: openai
+  name: gpt-4o-mini