Add comment view model

app/build.gradle

@@ -294,11 +294,9 @@ dependencies {
     implementation 'androidx.activity:activity-compose'
     implementation 'androidx.compose.ui:ui-tooling-preview'
     implementation 'androidx.compose.ui:ui-text:1.7.0-beta04' // Needed for parsing HTML to AnnotatedString
-    implementation 'com.github.nanihadesuka:LazyColumnScrollbar:2.1.0'
-
-    // Paging
-    implementation 'androidx.paging:paging-rxjava3:3.3.0'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-compose'
     implementation 'androidx.paging:paging-compose:3.3.0'
+    implementation 'com.github.nanihadesuka:LazyColumnScrollbar:2.1.0'
 
 /** Debugging **/
     // Memory leak detection

app/src/main/java/org/schabi/newpipe/compose/comment/Comment.kt

@@ -144,14 +144,14 @@ fun Comment(comment: CommentsInfoItem) {
     if (showReplies) {
         ModalBottomSheet(onDismissRequest = { showReplies = false }) {
             val coroutineScope = rememberCoroutineScope()
-            val flow = remember(coroutineScope) {
+            val flow = remember {
                 Pager(PagingConfig(pageSize = 20, enablePlaceholders = false)) {
                     CommentsSource(comment.serviceId, comment.url, comment.replies)
                 }.flow
                     .cachedIn(coroutineScope)
             }
 
-            CommentSection(parentComment = comment, commentsData = flow)
+            CommentSection(parentComment = comment, commentsFlow = flow)
         }
     }
 }

app/src/main/java/org/schabi/newpipe/compose/comment/CommentSection.kt

@@ -36,9 +36,9 @@ import org.schabi.newpipe.paging.CommentsDisabledException
 @Composable
 fun CommentSection(
     parentComment: CommentsInfoItem? = null,
-    commentsData: Flow<PagingData<CommentsInfoItem>>
+    commentsFlow: Flow<PagingData<CommentsInfoItem>>
 ) {
-    val comments = commentsData.collectAsLazyPagingItems()
+    val comments = commentsFlow.collectAsLazyPagingItems()
     val itemCount by remember { derivedStateOf { comments.itemCount } }
 
     Surface(color = MaterialTheme.colorScheme.background) {
@@ -113,7 +113,7 @@ private fun CommentSectionPreview(
     @PreviewParameter(CommentDataProvider::class) pagingData: PagingData<CommentsInfoItem>
 ) {
     AppTheme {
-        CommentSection(commentsData = flowOf(pagingData))
+        CommentSection(commentsFlow = flowOf(pagingData))
     }
 }
 
@@ -137,6 +137,6 @@ private fun CommentRepliesPreview() {
     val flow = flowOf(PagingData.from(replies))
 
     AppTheme {
-        CommentSection(parentComment = comment, commentsData = flow)
+        CommentSection(parentComment = comment, commentsFlow = flow)
     }
 }

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.kt

@@ -2,60 +2,37 @@ package org.schabi.newpipe.fragments.list.comments
 
 import android.os.Bundle
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.platform.ComposeView
 import androidx.compose.ui.platform.ViewCompositionStrategy
 import androidx.core.os.bundleOf
 import androidx.fragment.app.Fragment
-import androidx.paging.Pager
-import androidx.paging.PagingConfig
-import androidx.paging.cachedIn
+import androidx.lifecycle.viewmodel.compose.viewModel
 import org.schabi.newpipe.compose.comment.CommentSection
 import org.schabi.newpipe.compose.theme.AppTheme
-import org.schabi.newpipe.paging.CommentsSource
-import org.schabi.newpipe.util.NO_SERVICE_ID
+import org.schabi.newpipe.util.KEY_SERVICE_ID
+import org.schabi.newpipe.util.KEY_URL
+import org.schabi.newpipe.viewmodels.CommentsViewModel
 
 class CommentsFragment : Fragment() {
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
-    ): View {
-        val arguments = requireArguments()
-        val serviceId = arguments.getInt(SERVICE_ID, NO_SERVICE_ID)
-        val url = arguments.getString(URL)
-
-        return ComposeView(requireContext()).apply {
+    ) = ComposeView(requireContext()).apply {
         setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
         setContent {
-                val coroutineScope = rememberCoroutineScope()
-                val flow = remember(coroutineScope) {
-                    Pager(PagingConfig(pageSize = 20, enablePlaceholders = false)) {
-                        CommentsSource(serviceId, url, null)
-                    }.flow
-                        .cachedIn(coroutineScope)
-                }
-
+            val viewModel = viewModel<CommentsViewModel>()
             AppTheme {
-                    CommentSection(commentsData = flow)
-                }
+                CommentSection(commentsFlow = viewModel.comments)
             }
         }
     }
 
     companion object {
-        private const val SERVICE_ID = "serviceId"
-        private const val URL = "url"
-
         @JvmStatic
         fun getInstance(serviceId: Int, url: String?) = CommentsFragment().apply {
-            arguments = bundleOf(
-                SERVICE_ID to serviceId,
-                URL to url
-            )
+            arguments = bundleOf(KEY_SERVICE_ID to serviceId, KEY_URL to url)
         }
     }
 }

app/src/main/java/org/schabi/newpipe/viewmodels/CommentsViewModel.kt

@@ -0,0 +1,22 @@
+package org.schabi.newpipe.viewmodels
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.cachedIn
+import org.schabi.newpipe.paging.CommentsSource
+import org.schabi.newpipe.util.KEY_SERVICE_ID
+import org.schabi.newpipe.util.KEY_URL
+import org.schabi.newpipe.util.NO_SERVICE_ID
+
+class CommentsViewModel(savedStateHandle: SavedStateHandle) : ViewModel() {
+    private val serviceId = savedStateHandle[KEY_SERVICE_ID] ?: NO_SERVICE_ID
+    private val url = savedStateHandle.get<String>(KEY_URL)
+
+    val comments = Pager(PagingConfig(pageSize = 20, enablePlaceholders = false)) {
+        CommentsSource(serviceId, url, null)
+    }.flow
+        .cachedIn(viewModelScope)
+}