fix: comment pagination

app/src/main/java/ani/dantotsu/media/comments/CommentsFragment.kt

@@ -5,13 +5,12 @@ import android.annotation.SuppressLint
 import android.app.AlertDialog
 import android.content.Context.INPUT_METHOD_SERVICE
 import android.graphics.drawable.ColorDrawable
-import android.graphics.drawable.Drawable
 import android.os.Bundle
 import android.text.TextWatcher
 import android.view.LayoutInflater
+import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup
-import android.view.WindowManager
 import android.view.inputmethod.InputMethodManager
 import android.widget.EditText
 import androidx.appcompat.app.AppCompatActivity
@@ -27,36 +26,15 @@ import ani.dantotsu.connections.anilist.Anilist
 import ani.dantotsu.connections.comments.Comment
 import ani.dantotsu.connections.comments.CommentResponse
 import ani.dantotsu.connections.comments.CommentsAPI
-import ani.dantotsu.copyToClipboard
 import ani.dantotsu.databinding.FragmentCommentsBinding
 import ani.dantotsu.loadImage
-import ani.dantotsu.media.MediaDetailsActivity
 import ani.dantotsu.settings.saving.PrefManager
 import ani.dantotsu.settings.saving.PrefName
 import ani.dantotsu.snackString
-import com.bumptech.glide.Glide
-import com.bumptech.glide.RequestBuilder
-import com.bumptech.glide.RequestManager
-import com.bumptech.glide.load.DataSource
-import com.bumptech.glide.load.engine.GlideException
-import com.bumptech.glide.load.resource.gif.GifDrawable
-import com.bumptech.glide.request.RequestListener
-import com.bumptech.glide.request.target.Target
 import com.xwray.groupie.GroupieAdapter
 import com.xwray.groupie.Section
-import io.noties.markwon.AbstractMarkwonPlugin
-import io.noties.markwon.Markwon
-import io.noties.markwon.MarkwonConfiguration
-import io.noties.markwon.SoftBreakAddsNewLinePlugin
 import io.noties.markwon.editor.MarkwonEditor
 import io.noties.markwon.editor.MarkwonEditorTextWatcher
-import io.noties.markwon.ext.strikethrough.StrikethroughPlugin
-import io.noties.markwon.ext.tables.TablePlugin
-import io.noties.markwon.ext.tasklist.TaskListPlugin
-import io.noties.markwon.html.HtmlPlugin
-import io.noties.markwon.html.TagHandlerNoOp
-import io.noties.markwon.image.AsyncDrawable
-import io.noties.markwon.image.glide.GlideImagesPlugin
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -64,6 +42,7 @@ import java.text.SimpleDateFormat
 import java.util.Locale
 import java.util.TimeZone
 
+@SuppressLint("ClickableViewAccessibility")
 class CommentsFragment : Fragment() {
     lateinit var binding: FragmentCommentsBinding
     lateinit var activity: AppCompatActivity
@@ -193,8 +172,68 @@ class CommentsFragment : Fragment() {
         }
 
         var isFetching = false
+        binding.commentsList.setOnTouchListener(
+        object : View.OnTouchListener {
+            override fun onTouch(v: View?, event: MotionEvent?): Boolean {
+                if (event?.action == MotionEvent.ACTION_UP) {
+                    if (pagesLoaded < totalPages) {
+                        if (!binding.commentsList.canScrollVertically(1) && !isFetching &&
+                            (binding.commentsList.layoutManager as LinearLayoutManager).findLastVisibleItemPosition() == (binding.commentsList.adapter!!.itemCount - 1)
+                        ) {
+                            binding.commentBottomRefresh.visibility = View.VISIBLE
+                            loadMoreComments()
+                            lifecycleScope.launch {
+                                kotlinx.coroutines.delay(1000)
+                                withContext(Dispatchers.Main) {
+                                    binding.commentBottomRefresh.visibility = View.GONE
+                                }
+                            }
+                        }
+                    } else {
+                        snackString("No more comments")
+                    }
+                }
+                return false
+            }
+
+            private fun loadMoreComments() {
+                isFetching = true
+                lifecycleScope.launch {
+                    val comments = fetchComments()
+                    comments?.comments?.forEach { comment ->
+                        updateUIWithComment(comment)
+                    }
+                    totalPages = comments?.totalPages ?: 1
+                    pagesLoaded++
+                    isFetching = false
+                }
+            }
+
+            private suspend fun fetchComments(): CommentResponse? {
+                return withContext(Dispatchers.IO) {
+                    CommentsAPI.getCommentsForId(mediaId, pagesLoaded + 1, filterTag)
+                }
+            }
+
+            //adds additional comments to the section
+            private suspend fun updateUIWithComment(comment: Comment) {
+                withContext(Dispatchers.Main) {
+                    section.add(
+                        CommentItem(
+                            comment,
+                            buildMarkwon(activity),
+                            section,
+                            this@CommentsFragment,
+                            backgroundColor,
+                            0
+                        )
+                    )
+                }
+            }
+        })
+
         //if we have scrolled to the bottom of the list, load more comments
-        binding.commentsList.addOnScrollListener(object :
+        /*binding.commentsList.addOnScrollListener(object :
             androidx.recyclerview.widget.RecyclerView.OnScrollListener() {
             override fun onScrolled(
                 recyclerView: androidx.recyclerview.widget.RecyclerView,
@@ -245,7 +284,7 @@ class CommentsFragment : Fragment() {
                     )
                 }
             }
-        })
+        })*/
 
 
         binding.commentInput.addTextChangedListener(object : TextWatcher {

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

@@ -21,16 +21,6 @@
             android:layout_height="match_parent"
             android:orientation="vertical">
 
-            <androidx.core.widget.NestedScrollView
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:fillViewport="true">
-
-                <LinearLayout
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:orientation="vertical">
-
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -59,7 +49,6 @@
                     app:tint="?attr/colorOnBackground" />
             </LinearLayout>
 
-
             <ProgressBar
                 android:id="@+id/commentsProgressBar"
                 style="?android:attr/progressBarStyle"
@@ -68,18 +57,28 @@
                 android:layout_gravity="bottom|center_horizontal"
                 android:layout_marginTop="64dp" />
 
+            <FrameLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
 
                 <androidx.recyclerview.widget.RecyclerView
                     android:id="@+id/commentsList"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                        android:nestedScrollingEnabled="false"
+                    android:nestedScrollingEnabled="true"
                     android:visibility="gone"
                     tools:listitem="@layout/item_comments"
                     tools:visibility="visible" />
 
-                </LinearLayout>
+                <ProgressBar
-            </androidx.core.widget.NestedScrollView>
+                    android:id="@+id/commentBottomRefresh"
+                    style="?android:attr/progressBarStyle"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="bottom|center_horizontal"
+                    android:layout_marginBottom="32dp"
+                    android:visibility="gone" />
+            </FrameLayout>
         </LinearLayout>
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
@@ -133,8 +132,8 @@
             android:id="@+id/commentInputLayout"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="horizontal"
             android:background="?android:colorBackground"
+            android:orientation="horizontal"
             android:paddingTop="8dp"
             android:paddingBottom="8dp">
 
@@ -172,18 +171,18 @@
                 android:layout_width="24dp"
                 android:layout_height="24dp"
                 android:layout_gravity="center"
-                android:background="@drawable/ic_label_off_24"
                 android:layout_marginEnd="8dp"
+                android:background="@drawable/ic_label_off_24"
                 android:visibility="gone"
-                tools:visibility="visible"
+                tools:ignore="ContentDescription"
-                tools:ignore="ContentDescription" />
+                tools:visibility="visible" />
 
             <ImageButton
                 android:id="@+id/commentSend"
                 android:layout_width="32dp"
                 android:layout_height="32dp"
-                android:layout_marginEnd="12dp"
                 android:layout_gravity="center"
+                android:layout_marginEnd="12dp"
                 android:background="@drawable/ic_round_send_24"
                 android:visibility="gone"
                 tools:ignore="ContentDescription"