refactor: Rewrite comments fragments using Paging library (#5589)

* refactor: Rewrite comments fragment using Paging library

* Fix lint issue

* refactor: Rewrite comment replies to use paging adapter

* Add cachedIn step

* Address review comments, display parent comment

app/src/main/java/com/github/libretube/ui/adapters/CommentPagingAdapter.kt

@@ -1,9 +1,8 @@
 package com.github.libretube.ui.adapters
 
-import android.annotation.SuppressLint
 import android.view.LayoutInflater
+import android.view.View
 import android.view.ViewGroup
-import android.view.ViewGroup.MarginLayoutParams
 import android.widget.Toast
 import androidx.appcompat.content.res.AppCompatResources
 import androidx.core.os.bundleOf
@@ -16,13 +15,13 @@ import androidx.core.view.updatePadding
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.commit
 import androidx.fragment.app.replace
-import androidx.recyclerview.widget.RecyclerView
+import androidx.paging.PagingDataAdapter
+import androidx.recyclerview.widget.DiffUtil
 import com.github.libretube.R
 import com.github.libretube.api.obj.Comment
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.CommentsRowBinding
 import com.github.libretube.extensions.formatShort
-import com.github.libretube.extensions.toID
 import com.github.libretube.helpers.ClipboardHelper
 import com.github.libretube.helpers.ImageHelper
 import com.github.libretube.helpers.NavigationHelper
@@ -31,35 +30,18 @@ import com.github.libretube.ui.fragments.CommentsRepliesFragment
 import com.github.libretube.ui.viewholders.CommentsViewHolder
 import com.github.libretube.util.HtmlParser
 import com.github.libretube.util.LinkHandler
-import com.github.libretube.util.TextUtils
 
-class CommentsAdapter(
+class CommentPagingAdapter(
     private val fragment: Fragment?,
     private val videoId: String,
     private val channelAvatar: String?,
-    private val comments: MutableList<Comment>,
-    private val isRepliesAdapter: Boolean = false,
+    private val parentComment: Comment? = null,
     private val handleLink: ((url: String) -> Unit)?,
     private val dismiss: () -> Unit
-) : RecyclerView.Adapter<CommentsViewHolder>() {
+) : PagingDataAdapter<Comment, CommentsViewHolder>(CommentCallback) {
+    private val isRepliesAdapter = parentComment != null
 
-    fun clear() {
-        val size: Int = comments.size
-        comments.clear()
-        notifyItemRangeRemoved(0, size)
-    }
-
-    fun updateItems(newItems: List<Comment>) {
-        val commentsSize = comments.size
-        comments.addAll(newItems)
-        notifyItemRangeInserted(commentsSize, newItems.size)
-    }
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CommentsViewHolder {
-        val layoutInflater = LayoutInflater.from(parent.context)
-        val binding = CommentsRowBinding.inflate(layoutInflater, parent, false)
-        return CommentsViewHolder(binding)
-    }
+    override fun getItemCount() = (if (isRepliesAdapter) 1 else 0) + super.getItemCount()
 
     private fun navigateToReplies(comment: Comment) {
         val args = bundleOf(IntentData.videoId to videoId, IntentData.comment to comment)
@@ -69,20 +51,25 @@ class CommentsAdapter(
         }
     }
 
-    @SuppressLint("SetTextI18n")
     override fun onBindViewHolder(holder: CommentsViewHolder, position: Int) {
-        val comment = comments[position]
+        val comment = if (parentComment != null) {
+            if (position == 0) parentComment else getItem(position - 1)!!
+        } else {
+            getItem(position)!!
+        }
         holder.binding.apply {
             commentAuthor.text = comment.author
             commentAuthor.setBackgroundResource(
                 if (comment.channelOwner) R.drawable.comment_channel_owner_bg else 0
             )
-            commentInfos.text = TextUtils.SEPARATOR + comment.commentedTime
+            commentInfos.text = root.context
+                .getString(R.string.commentedTimeWithSeparator, comment.commentedTime)
 
             commentText.movementMethod = LinkMovementMethodCompat.getInstance()
             commentText.text = comment.commentText?.replace("</a>", "</a> ")
                 ?.parseAsHtml(tagHandler = HtmlParser(LinkHandler(handleLink ?: {})))
 
+            commentorImage.setImageDrawable(null)
             ImageHelper.loadImage(comment.thumbnail, commentorImage, true)
             likesTextView.text = comment.likeCount.formatShort()
 
@@ -91,24 +78,24 @@ class CommentsAdapter(
                 creatorReplyImageView.isVisible = true
             }
 
-            if (comment.verified) verifiedImageView.isVisible = true
-            if (comment.pinned) pinnedImageView.isVisible = true
-            if (comment.hearted) heartedImageView.isVisible = true
-            if (comment.repliesPage != null) repliesCount.isVisible = true
+            verifiedImageView.isVisible = comment.verified
+            pinnedImageView.isVisible = comment.pinned
+            heartedImageView.isVisible = comment.hearted
+            repliesCount.isVisible = comment.repliesPage != null
             if (comment.replyCount > 0L) {
                 repliesCount.text = comment.replyCount.formatShort()
             }
 
             commentorImage.setOnClickListener {
                 NavigationHelper.navigateChannel(root.context, comment.commentorUrl)
-                dismiss.invoke()
+                dismiss()
             }
 
             if (isRepliesAdapter) {
                 repliesCount.isGone = true
 
                 // highlight the comment that is being replied to
-                if (comment == comments.firstOrNull()) {
+                if (position == 0) {
                     root.setBackgroundColor(
                         ThemeHelper.getThemeColor(
                             root.context,
@@ -117,7 +104,7 @@ class CommentsAdapter(
                     )
 
                     root.updatePadding(top = 20)
-                    root.updateLayoutParams<MarginLayoutParams> { bottomMargin = 20 }
+                    root.updateLayoutParams<ViewGroup.MarginLayoutParams> { bottomMargin = 20 }
                 } else {
                     root.background = AppCompatResources.getDrawable(
                         root.context,
@@ -127,12 +114,9 @@ class CommentsAdapter(
             }
 
             if (!isRepliesAdapter && comment.repliesPage != null) {
-                root.setOnClickListener {
-                    navigateToReplies(comment)
-                }
-                commentText.setOnClickListener {
-                    navigateToReplies(comment)
-                }
+                val onClickListener = View.OnClickListener { navigateToReplies(comment) }
+                root.setOnClickListener(onClickListener)
+                commentText.setOnClickListener(onClickListener)
             }
             root.setOnLongClickListener {
                 ClipboardHelper.save(
@@ -145,5 +129,17 @@ class CommentsAdapter(
         }
     }
 
-    override fun getItemCount() = comments.size
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CommentsViewHolder {
+        val layoutInflater = LayoutInflater.from(parent.context)
+        val binding = CommentsRowBinding.inflate(layoutInflater, parent, false)
+        return CommentsViewHolder(binding)
+    }
+}
+
+private object CommentCallback : DiffUtil.ItemCallback<Comment>() {
+    override fun areItemsTheSame(oldItem: Comment, newItem: Comment): Boolean {
+        return oldItem.commentId == newItem.commentId
+    }
+
+    override fun areContentsTheSame(oldItem: Comment, newItem: Comment) = true
 }

app/src/main/java/com/github/libretube/ui/fragments/CommentsMainFragment.kt

@@ -7,19 +7,22 @@ import android.view.ViewGroup
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import androidx.paging.LoadState
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
 import com.github.libretube.databinding.FragmentCommentsBinding
 import com.github.libretube.extensions.formatShort
-import com.github.libretube.ui.adapters.CommentsAdapter
+import com.github.libretube.ui.adapters.CommentPagingAdapter
 import com.github.libretube.ui.models.CommentsViewModel
 import com.github.libretube.ui.sheets.CommentsSheet
+import kotlinx.coroutines.launch
 
 class CommentsMainFragment : Fragment() {
     private var _binding: FragmentCommentsBinding? = null
-
-    private lateinit var commentsAdapter: CommentsAdapter
-
+    private val binding get() = _binding!!
     private val viewModel: CommentsViewModel by activityViewModels()
 
     override fun onCreateView(
@@ -28,13 +31,13 @@ class CommentsMainFragment : Fragment() {
         savedInstanceState: Bundle?
     ): View {
         _binding = FragmentCommentsBinding.inflate(inflater, container, false)
-        return _binding!!.root
+        return binding.root
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        val binding = _binding ?: return
+        val binding = binding
         val layoutManager = LinearLayoutManager(requireContext())
         binding.commentsRV.layoutManager = layoutManager
         binding.commentsRV.setItemViewCacheSize(20)
@@ -47,68 +50,50 @@ class CommentsMainFragment : Fragment() {
         }
 
         binding.commentsRV.viewTreeObserver.addOnScrollChangedListener {
-            val viewBinding = _binding ?: return@addOnScrollChangedListener
             // save the last scroll position to become used next time when the sheet is opened
             viewModel.currentCommentsPosition = layoutManager.findFirstVisibleItemPosition()
 
             // hide or show the scroll to top button
             commentsSheet?.binding?.btnScrollToTop?.isVisible = viewModel.currentCommentsPosition != 0
-
-            if (!viewBinding.commentsRV.canScrollVertically(1)) {
-                viewModel.fetchNextComments()
-            }
         }
         commentsSheet?.updateFragmentInfo(false, getString(R.string.comments))
 
-        commentsAdapter = CommentsAdapter(
+        val commentPagingAdapter = CommentPagingAdapter(
             this,
-            viewModel.videoId ?: return,
+            viewModel.videoIdLiveData.value ?: return,
             viewModel.channelAvatar ?: return,
-            viewModel.commentsPage.value?.comments.orEmpty().toMutableList(),
-            handleLink = viewModel.handleLink
+            handleLink = viewModel.handleLink,
         ) {
             viewModel.commentsSheetDismiss?.invoke()
         }
-        binding.commentsRV.adapter = commentsAdapter
+        binding.commentsRV.adapter = commentPagingAdapter
 
-        if (viewModel.commentsPage.value?.comments.isNullOrEmpty()) {
-            viewModel.fetchComments()
-        } else {
-            binding.commentsRV.scrollToPosition(viewModel.currentCommentsPosition)
-        }
+        viewLifecycleOwner.lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    commentPagingAdapter.loadStateFlow.collect {
+                        binding.progress.isVisible = it.refresh is LoadState.Loading
 
-        viewModel.isLoading.observe(viewLifecycleOwner) {
-            _binding?.progress?.isVisible = it == true
-        }
+                        if (it.append is LoadState.NotLoading && it.append.endOfPaginationReached) {
+                            binding.errorTV.text = getString(R.string.no_comments_available)
+                            binding.errorTV.isVisible = true
+                            return@collect
+                        }
+                    }
+                }
 
-        // listen for new comments to be loaded
-        viewModel.commentsPage.observe(viewLifecycleOwner) {
-            if (it == null) return@observe
-            val viewBinding = _binding ?: return@observe
+                launch {
+                    viewModel.commentsFlow.collect {
+                        commentPagingAdapter.submitData(it)
 
-            if (it.disabled) {
-                viewBinding.errorTV.isVisible = true
-                return@observe
+                        val commentCount = commentPagingAdapter.itemCount.toLong().formatShort()
+                        commentsSheet?.updateFragmentInfo(
+                            false,
+                            getString(R.string.comments_count, commentCount)
+                        )
+                    }
+                }
             }
-
-            commentsSheet?.updateFragmentInfo(
-                false,
-                "${getString(R.string.comments)} (${it.commentCount.formatShort()})"
-            )
-            if (it.comments.isEmpty()) {
-                viewBinding.errorTV.text = getString(R.string.no_comments_available)
-                viewBinding.errorTV.isVisible = true
-                return@observe
-            }
-
-            // sometimes the received comments have the same size as the existing ones
-            // which causes comments.subList to throw InvalidArgumentException
-            if (commentsAdapter.itemCount > it.comments.size) return@observe
-
-            commentsAdapter.updateItems(
-                // only add the new comments to the recycler view
-                it.comments.subList(commentsAdapter.itemCount, it.comments.size)
-            )
         }
     }
 

app/src/main/java/com/github/libretube/ui/fragments/CommentsRepliesFragment.kt

@@ -1,7 +1,6 @@
 package com.github.libretube.ui.fragments
 
 import android.os.Bundle
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -10,41 +9,35 @@ import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import androidx.paging.LoadState
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
-import com.github.libretube.api.RetrofitInstance
 import com.github.libretube.api.obj.Comment
-import com.github.libretube.api.obj.CommentsPage
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.FragmentCommentsBinding
-import com.github.libretube.extensions.TAG
 import com.github.libretube.extensions.formatShort
 import com.github.libretube.extensions.parcelable
-import com.github.libretube.ui.adapters.CommentsAdapter
-import com.github.libretube.ui.extensions.filterNonEmptyComments
+import com.github.libretube.ui.adapters.CommentPagingAdapter
 import com.github.libretube.ui.models.CommentsViewModel
 import com.github.libretube.ui.sheets.CommentsSheet
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 class CommentsRepliesFragment : Fragment() {
     private var _binding: FragmentCommentsBinding? = null
+    private val binding get() = _binding!!
 
-    private lateinit var repliesPage: CommentsPage
-    private lateinit var repliesAdapter: CommentsAdapter
     private val viewModel: CommentsViewModel by activityViewModels()
 
-    private var isLoading = false
-
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
         _binding = FragmentCommentsBinding.inflate(inflater, container, false)
-        return _binding!!.root
+        return binding.root
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -53,18 +46,17 @@ class CommentsRepliesFragment : Fragment() {
         val videoId = arguments.getString(IntentData.videoId, "")
         val comment = arguments.parcelable<Comment>(IntentData.comment)!!
 
-        val binding = _binding ?: return
+        val binding = binding
 
         val commentsSheet = parentFragment as? CommentsSheet
         commentsSheet?.binding?.btnScrollToTop?.isGone = true
 
-        repliesAdapter = CommentsAdapter(
+        val repliesAdapter = CommentPagingAdapter(
             null,
             videoId,
             viewModel.channelAvatar,
-            mutableListOf(comment),
-            true,
-            viewModel.handleLink
+            comment,
+            viewModel.handleLink,
         ) {
             viewModel.commentsSheetDismiss?.invoke()
         }
@@ -77,49 +69,27 @@ class CommentsRepliesFragment : Fragment() {
         binding.commentsRV.layoutManager = LinearLayoutManager(context)
         binding.commentsRV.adapter = repliesAdapter
 
-        binding.commentsRV.viewTreeObserver.addOnScrollChangedListener {
-            if (_binding?.commentsRV?.canScrollVertically(1) == false && ::repliesPage.isInitialized) {
-                if (repliesPage.nextpage == null) return@addOnScrollChangedListener
+        viewModel.selectedCommentLiveData.postValue(comment.repliesPage)
 
-                fetchReplies(videoId, repliesPage.nextpage!!)
+        viewLifecycleOwner.lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    repliesAdapter.loadStateFlow.collect {
+                        binding.progress.isVisible = it.refresh is LoadState.Loading
+                    }
+                }
+
+                launch {
+                    viewModel.commentRepliesFlow.collect {
+                        repliesAdapter.submitData(it)
+                    }
+                }
             }
         }
-
-        loadInitialReplies(videoId, comment.repliesPage.orEmpty())
     }
 
     override fun onDestroyView() {
         super.onDestroyView()
         _binding = null
     }
-
-    private fun loadInitialReplies(videoId: String, nextPage: String) {
-        _binding?.progress?.isVisible = true
-        fetchReplies(videoId, nextPage)
-    }
-
-    private fun fetchReplies(videoId: String, nextPage: String) {
-        _binding?.progress?.isVisible = true
-
-        lifecycleScope.launch {
-            if (isLoading) return@launch
-            isLoading = true
-
-            repliesPage = try {
-                withContext(Dispatchers.IO) {
-                    RetrofitInstance.api.getCommentsNextPage(videoId, nextPage)
-                }
-            } catch (e: Exception) {
-                Log.e(TAG(), "IOException, you might not have internet connection")
-                return@launch
-            } finally {
-                _binding?.progress?.isGone = true
-            }
-            repliesPage.comments = repliesPage.comments.filterNonEmptyComments()
-            withContext(Dispatchers.Main) {
-                repliesAdapter.updateItems(repliesPage.comments)
-            }
-            isLoading = false
-        }
-    }
 }

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -548,7 +548,7 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
             // set the max height to not cover the currently playing video
             commentsViewModel.handleLink = this::handleLink
             updateMaxSheetHeight()
-            commentsViewModel.videoId = videoId
+            commentsViewModel.videoIdLiveData.postValue(videoId)
             commentsViewModel.channelAvatar = streams.uploaderAvatar
             CommentsSheet().show(childFragmentManager)
         }

app/src/main/java/com/github/libretube/ui/models/CommentsViewModel.kt

@@ -1,27 +1,45 @@
 package com.github.libretube.ui.models
 
-import android.util.Log
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.asFlow
 import androidx.lifecycle.viewModelScope
-import com.github.libretube.api.RetrofitInstance
-import com.github.libretube.api.obj.CommentsPage
-import com.github.libretube.extensions.TAG
-import com.github.libretube.ui.extensions.filterNonEmptyComments
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.cachedIn
+import com.github.libretube.ui.models.sources.CommentPagingSource
+import com.github.libretube.ui.models.sources.CommentRepliesPagingSource
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flatMapLatest
 
 class CommentsViewModel : ViewModel() {
-    val commentsPage = MutableLiveData<CommentsPage?>()
+    val videoIdLiveData = MutableLiveData<String>()
+    val selectedCommentLiveData = MutableLiveData<String>()
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    val commentsFlow = videoIdLiveData.asFlow()
+        .flatMapLatest {
+            Pager(PagingConfig(pageSize = 20, enablePlaceholders = false)) {
+                CommentPagingSource(it)
+            }.flow
+        }
+        .cachedIn(viewModelScope)
+    @OptIn(ExperimentalCoroutinesApi::class)
+    val commentRepliesFlow = videoIdLiveData.asFlow()
+        .combine(selectedCommentLiveData.asFlow()) { videoId, comment -> videoId to comment }
+        .flatMapLatest { (videoId, commentPage) ->
+            Pager(PagingConfig(20, enablePlaceholders = false)) {
+                CommentRepliesPagingSource(videoId, commentPage)
+            }.flow
+        }
+        .cachedIn(viewModelScope)
+
     val commentSheetExpand = MutableLiveData<Boolean?>()
 
-    var videoId: String? = null
     var channelAvatar: String? = null
     var handleLink: ((url: String) -> Unit)? = null
 
-    private var nextPage: String? = null
-    var isLoading = MutableLiveData<Boolean>()
     var currentCommentsPosition = 0
     var commentsSheetDismiss: (() -> Unit)? = null
 
@@ -31,62 +49,7 @@ class CommentsViewModel : ViewModel() {
         }
     }
 
-    fun fetchComments() {
-        val videoId = videoId ?: return
-
-        isLoading.value = true
-
-        viewModelScope.launch {
-            val response = try {
-                withContext(Dispatchers.IO) {
-                    RetrofitInstance.api.getComments(videoId)
-                }
-            } catch (e: Exception) {
-                Log.e(TAG(), e.toString())
-                return@launch
-            } finally {
-                isLoading.value = false
-            }
-
-            nextPage = response.nextpage
-            response.comments = response.comments.filterNonEmptyComments()
-            commentsPage.postValue(response)
-        }
-    }
-
-    fun fetchNextComments() {
-        if (isLoading.value == true || nextPage == null || videoId == null) return
-
-        isLoading.value = true
-
-        viewModelScope.launch {
-            val response = try {
-                withContext(Dispatchers.IO) {
-                    RetrofitInstance.api.getCommentsNextPage(videoId!!, nextPage!!)
-                }
-            } catch (e: Exception) {
-                Log.e(TAG(), e.toString())
-                return@launch
-            } finally {
-                isLoading.value = false
-            }
-
-            val updatedPage = commentsPage.value?.apply {
-                comments += response.comments
-                    .filterNonEmptyComments()
-                    .filter { comment -> comments.none { it.commentId == comment.commentId } }
-            }
-
-            nextPage = response.nextpage
-            commentsPage.postValue(updatedPage)
-        }
-    }
-
     fun reset() {
-        isLoading.value = false
-        nextPage = null
-        commentsPage.value = null
-        videoId = null
         setCommentSheetExpand(null)
         currentCommentsPosition = 0
     }

app/src/main/java/com/github/libretube/ui/models/sources/CommentPagingSource.kt

@@ -0,0 +1,21 @@
+package com.github.libretube.ui.models.sources
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.github.libretube.api.RetrofitInstance
+import com.github.libretube.api.obj.Comment
+
+class CommentPagingSource(private val videoId: String) : PagingSource<String, Comment>() {
+    override fun getRefreshKey(state: PagingState<String, Comment>) = null
+
+    override suspend fun load(params: LoadParams<String>): LoadResult<String, Comment> {
+        return try {
+            val result = params.key?.let {
+                RetrofitInstance.api.getCommentsNextPage(videoId, it)
+            } ?: RetrofitInstance.api.getComments(videoId)
+            LoadResult.Page(result.comments, null, result.nextpage)
+        } catch (e: Exception) {
+            LoadResult.Error(e)
+        }
+    }
+}

app/src/main/java/com/github/libretube/ui/models/sources/CommentRepliesPagingSource.kt

@@ -0,0 +1,23 @@
+package com.github.libretube.ui.models.sources
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.github.libretube.api.RetrofitInstance
+import com.github.libretube.api.obj.Comment
+
+class CommentRepliesPagingSource(
+    private val videoId: String,
+    private val commentNextPage: String?,
+) : PagingSource<String, Comment>() {
+    override fun getRefreshKey(state: PagingState<String, Comment>) = null
+
+    override suspend fun load(params: LoadParams<String>): LoadResult<String, Comment> {
+        return try {
+            val key = params.key.orEmpty().ifEmpty { commentNextPage.orEmpty() }
+            val result = RetrofitInstance.api.getCommentsNextPage(videoId, key)
+            LoadResult.Page(result.comments, null, result.nextpage)
+        } catch (e: Exception) {
+            LoadResult.Error(e)
+        }
+    }
+}

app/src/main/res/values/strings.xml

@@ -66,10 +66,12 @@
     <string name="donate">Donate</string>
     <string name="uploaderAndVideoCount">%1$s • %2$d videos</string>
     <string name="subscriberAndVideoCounts">%1$s subscribers • %2$d videos</string>
+    <string name="commentedTimeWithSeparator"> • %1$s</string>
     <string name="videoCount">%1$d videos</string>
     <string name="noInternet">Connect to the Internet first.</string>
     <string name="retry">Retry</string>
     <string name="comments">Comments</string>
+    <string name="comments_count">Comments (%1$s)</string>
     <string name="replies">Replies</string>
     <string name="channels">Channels</string>
     <string name="all">All</string>