[mod] #170 마이피드 아이템 일부만 삭제하도록 변경

app/src/main/java/com/android/go/sopt/winey/presentation/main/mypage/myfeed/MyFeedAdapter.kt

@@ -3,7 +3,6 @@ package com.android.go.sopt.winey.presentation.main.mypage.myfeed
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.paging.ItemSnapshotList
 import androidx.paging.PagingDataAdapter
 import androidx.recyclerview.widget.RecyclerView
 import com.android.go.sopt.winey.databinding.ItemMyfeedPostBinding
@@ -12,18 +11,13 @@ import com.android.go.sopt.winey.util.view.ItemDiffCallback
 import com.android.go.sopt.winey.util.view.setOnSingleClickListener
 
 class MyFeedAdapter(
-    private val onlikeButtonClicked: (WineyFeed: WineyFeed) -> Unit,
-    private val onPopupMenuClicked: (View, WineyFeed: WineyFeed) -> Unit,
-    private val toFeedDetail: (WineyFeed: WineyFeed) -> Unit
+    private val onlikeButtonClicked: (WineyFeed) -> Unit,
+    private val onPopupMenuClicked: (View, WineyFeed) -> Unit,
+    private val toFeedDetail: (WineyFeed) -> Unit
 ) : PagingDataAdapter<WineyFeed, MyFeedAdapter.MyFeedViewHolder>(diffUtil) {
-    private val currentData: ItemSnapshotList<WineyFeed>
-        get() = snapshot()
 
-    class MyFeedViewHolder(
-        private val binding: ItemMyfeedPostBinding,
-        private val onlikeButtonClicked: (WineyFeed: WineyFeed) -> Unit,
-        private val onPopupMenuClicked: (View, WineyFeed: WineyFeed) -> Unit,
-        private val toFeedDetail: (WineyFeed: WineyFeed) -> Unit
+    inner class MyFeedViewHolder(
+        private val binding: ItemMyfeedPostBinding
     ) : RecyclerView.ViewHolder(binding.root) {
         fun onBind(data: WineyFeed?) {
             binding.apply {
@@ -50,7 +44,7 @@ class MyFeedAdapter(
     ): MyFeedViewHolder {
         val binding =
             ItemMyfeedPostBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-        return MyFeedViewHolder(binding, onlikeButtonClicked, onPopupMenuClicked, toFeedDetail)
+        return MyFeedViewHolder(binding)
     }
 
     override fun onBindViewHolder(holder: MyFeedViewHolder, position: Int) {
@@ -67,6 +61,14 @@ class MyFeedAdapter(
         }
     }
 
+    fun deleteItem(feedId: Int): MutableList<WineyFeed> {
+        val currentList = snapshot().items
+        val newList = currentList.toMutableList()
+        val feed = currentList.find { it.feedId == feedId }
+        newList.remove(feed)
+        return newList
+    }
+
     companion object {
         private val diffUtil = ItemDiffCallback<WineyFeed>(
             onItemsTheSame = { old, new -> old.feedId == new.feedId },

app/src/main/java/com/android/go/sopt/winey/presentation/main/mypage/myfeed/MyFeedFragment.kt

@@ -15,6 +15,7 @@ import androidx.lifecycle.flowWithLifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
 import androidx.paging.LoadState
+import androidx.paging.PagingData
 import androidx.recyclerview.widget.SimpleItemAnimator
 import com.android.go.sopt.winey.R
 import com.android.go.sopt.winey.databinding.FragmentMyfeedBinding
@@ -23,8 +24,6 @@ import com.android.go.sopt.winey.presentation.main.feed.WineyFeedLoadAdapter
 import com.android.go.sopt.winey.presentation.main.feed.detail.DetailActivity
 import com.android.go.sopt.winey.presentation.main.mypage.MyPageFragment
 import com.android.go.sopt.winey.util.binding.BindingFragment
-import com.android.go.sopt.winey.util.context.stringOf
-import com.android.go.sopt.winey.util.context.wineySnackbar
 import com.android.go.sopt.winey.util.fragment.WineyDialogFragment
 import com.android.go.sopt.winey.util.fragment.snackBar
 import com.android.go.sopt.winey.util.fragment.stringOf
@@ -52,11 +51,14 @@ class MyFeedFragment : BindingFragment<FragmentMyfeedBinding>(R.layout.fragment_
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+
         removeRecyclerviewItemChangeAnimation()
         initAdapter()
+        initBackButtonClickListener()
+
         initGetFeedStateObserver()
         initPostLikeStateObserver()
-        initButtonClickListener()
+        initDeleteFeedStateObserver()
     }
 
     override fun onStart() {
@@ -112,20 +114,37 @@ class MyFeedFragment : BindingFragment<FragmentMyfeedBinding>(R.layout.fragment_
         showAsDropDown(anchorView, -POPUP_MENU_OFFSET, -POPUP_MENU_OFFSET, Gravity.END)
     }
 
-    private fun showFeedDeleteDialog(wineyFeed: WineyFeed) {
+    private fun showFeedDeleteDialog(feed: WineyFeed) {
         val dialog = WineyDialogFragment(
             stringOf(R.string.feed_delete_dialog_title),
             stringOf(R.string.feed_delete_dialog_subtitle),
             stringOf(R.string.comment_delete_dialog_negative_button),
             stringOf(R.string.comment_delete_dialog_positive_button),
             handleNegativeButton = {},
-            handlePositiveButton = { viewModel.deleteFeed(wineyFeed.feedId) }
+            handlePositiveButton = {
+                viewModel.deleteFeed(feed.feedId)
+                deletePagingDataItem(feed.feedId)
+            }
         )
         dialog.show(parentFragmentManager, TAG_FEED_DELETE_DIALOG)
-        initDeleteFeedStateObserver()
     }
 
-    private fun initButtonClickListener() {
+    private fun deletePagingDataItem(feedId: Int) {
+        viewLifeCycleScope.launch {
+            val newList = myFeedAdapter.deleteItem(feedId)
+            checkEmptyList(newList)
+            myFeedAdapter.submitData(PagingData.from(newList))
+        }
+    }
+
+    private fun checkEmptyList(newList: MutableList<WineyFeed>) {
+        if (newList.isEmpty()) {
+            binding.rvMyfeedPost.isVisible = false
+            binding.clMyfeedEmpty.isVisible = true
+        }
+    }
+
+    private fun initBackButtonClickListener() {
         binding.imgMyfeedBack.setOnSingleClickListener {
             navigateTo<MyPageFragment>()
             parentFragmentManager.popBackStack()
@@ -136,7 +155,6 @@ class MyFeedFragment : BindingFragment<FragmentMyfeedBinding>(R.layout.fragment_
         viewModel.deleteMyFeedState.flowWithLifecycle(viewLifeCycle).onEach { state ->
             when (state) {
                 is UiState.Success -> {
-                    refreshMyFeed()
                     wineySnackbar(requireView(), true, stringOf(R.string.snackbar_feed_delete_success))
                 }
 
@@ -150,22 +168,21 @@ class MyFeedFragment : BindingFragment<FragmentMyfeedBinding>(R.layout.fragment_
     }
 
     private fun initGetFeedStateObserver() {
-        viewLifecycleOwner.lifecycleScope.launch {
+        viewLifeCycleScope.launch {
             viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 viewModel.getMyFeedListState.collectLatest { state ->
                     when (state) {
                         is UiState.Success -> {
                             myFeedAdapter.addLoadStateListener { loadState ->
                                 when (loadState.refresh) {
                                     is LoadState.Loading -> {
-                                        binding.lMyfeedEmpty.isVisible = false
+                                        binding.clMyfeedEmpty.isVisible = false
                                         binding.rvMyfeedPost.isVisible = false
                                     }
 
                                     is LoadState.NotLoading -> {
                                         binding.rvMyfeedPost.isVisible = myFeedAdapter.itemCount > 0
-                                        binding.lMyfeedEmpty.isVisible =
-                                            myFeedAdapter.itemCount == 0
+                                        binding.clMyfeedEmpty.isVisible = myFeedAdapter.itemCount == 0
                                         restoreScrollPosition()
                                     }
 
@@ -208,14 +225,6 @@ class MyFeedFragment : BindingFragment<FragmentMyfeedBinding>(R.layout.fragment_
         }.launchIn(viewLifeCycleScope)
     }
 
-    private fun refreshMyFeed() {
-        val fragmentManager = requireActivity().supportFragmentManager
-        fragmentManager.beginTransaction().apply {
-            replace(R.id.fcv_main, MyFeedFragment())
-            commit()
-        }
-    }
-
     private fun navigateToDetail(wineyFeed: WineyFeed) {
         selectedItemIndex = myFeedAdapter.snapshot().indexOf(wineyFeed)
         selectedScrollPosition = binding.rvMyfeedPost.layoutManager?.onSaveInstanceState()

app/src/main/java/com/android/go/sopt/winey/presentation/main/mypage/myfeed/MyFeedViewModel.kt

@@ -23,16 +23,15 @@ import javax.inject.Inject
 class MyFeedViewModel @Inject constructor(
     private val feedRepository: FeedRepository
 ) : ViewModel() {
-
     private val _getMyFeedListState =
-        MutableStateFlow<UiState<PagingData<WineyFeed>>>(UiState.Loading)
+        MutableStateFlow<UiState<PagingData<WineyFeed>>>(UiState.Empty)
     val getMyFeedListState: StateFlow<UiState<PagingData<WineyFeed>>> =
         _getMyFeedListState.asStateFlow()
 
     private val _postMyFeedLikeState = MutableStateFlow<UiState<Like>>(UiState.Empty)
     val postMyFeedLikeState: StateFlow<UiState<Like>> = _postMyFeedLikeState.asStateFlow()
 
-    val _deleteMyFeedState = MutableStateFlow<UiState<Unit>>(UiState.Loading)
+    private val _deleteMyFeedState = MutableStateFlow<UiState<Unit>>(UiState.Empty)
     val deleteMyFeedState: StateFlow<UiState<Unit>> = _deleteMyFeedState.asStateFlow()
 
     init {
@@ -47,6 +46,7 @@ class MyFeedViewModel @Inject constructor(
     private fun postLike(feedId: Int, requestPostLikeDto: RequestPostLikeDto) {
         viewModelScope.launch {
             _postMyFeedLikeState.emit(UiState.Loading)
+
             feedRepository.postFeedLike(feedId, requestPostLikeDto)
                 .onSuccess { response ->
                     _postMyFeedLikeState.emit(UiState.Success(response))
@@ -58,6 +58,7 @@ class MyFeedViewModel @Inject constructor(
     fun getMyFeed() {
         viewModelScope.launch {
             _getMyFeedListState.emit(UiState.Loading)
+
             feedRepository.getMyFeedList().cachedIn(viewModelScope)
                 .collectLatest { response ->
                     _getMyFeedListState.emit(UiState.Success(response))

app/src/main/res/layout/fragment_myfeed.xml

@@ -61,7 +61,7 @@
             app:layout_constraintTop_toBottomOf="@id/cl_detail_app_bar">
 
             <androidx.constraintlayout.widget.ConstraintLayout
-                android:id="@+id/l_myfeed_empty"
+                android:id="@+id/cl_myfeed_empty"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 app:layout_constraintBottom_toBottomOf="@+id/rv_myfeed_post"