fix: don't block ui thread while filtering watched videos

app/src/main/java/com/github/libretube/api/SubscriptionHelper.kt

@@ -1,7 +1,5 @@
 package com.github.libretube.api
 
-import android.content.Context
-import com.github.libretube.R
 import com.github.libretube.constants.PreferenceKeys
 import com.github.libretube.db.obj.SubscriptionsFeedItem
 import com.github.libretube.helpers.PreferenceHelper
@@ -14,8 +12,6 @@ import com.github.libretube.repo.PipedAccountFeedRepository
 import com.github.libretube.repo.PipedLocalSubscriptionsRepository
 import com.github.libretube.repo.PipedNoAccountFeedRepository
 import com.github.libretube.repo.SubscriptionsRepository
-import com.google.android.material.dialog.MaterialAlertDialogBuilder
-import kotlinx.coroutines.runBlocking
 
 object SubscriptionHelper {
     /**

app/src/main/java/com/github/libretube/db/DatabaseHelper.kt

@@ -102,7 +102,7 @@ object DatabaseHelper {
         return unfinished xor isVideoWatched(watchHistoryItem.videoId, watchHistoryItem.duration ?: 0)
     }
 
-    fun filterByStatusAndWatchPosition(
+    suspend fun filterByStatusAndWatchPosition(
         streams: List<StreamItem>,
         hideWatched: Boolean
     ): List<StreamItem> {
@@ -116,13 +116,8 @@ object DatabaseHelper {
                 else -> true
             }
         }
+        if (!hideWatched) return streamItems
 
-        return if (hideWatched) {
+        return filterUnwatched(streamItems)
-            runBlocking {
-                filterUnwatched(streamItems)
-            }
-        } else {
-            streamItems
-        }
     }
 }

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

@@ -28,6 +28,7 @@ import com.github.libretube.ui.extensions.setupFragmentAnimation
 import com.github.libretube.ui.models.HomeViewModel
 import com.github.libretube.ui.models.SubscriptionsViewModel
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.runBlocking
 
 
 class HomeFragment : Fragment(R.layout.fragment_home) {
@@ -150,7 +151,7 @@ class HomeFragment : Fragment(R.layout.fragment_home) {
         makeVisible(binding.featuredRV, binding.featuredTV)
         val hideWatched = PreferenceHelper.getBoolean(PreferenceKeys.HIDE_WATCHED_FROM_FEED, false)
         val feedVideos = streamItems
-            .let { DatabaseHelper.filterByStatusAndWatchPosition(it, hideWatched) }
+            .let { runBlocking { DatabaseHelper.filterByStatusAndWatchPosition(it, hideWatched) } }
             .take(20)
 
         feedAdapter.submitList(feedVideos)

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

@@ -142,7 +142,9 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         var alreadyShowedFeedOnce = false
         viewModel.videoFeed.observe(viewLifecycleOwner) {
             if (!viewModel.isCurrentTabSubChannels && it != null) {
-                showFeed(!alreadyShowedFeedOnce)
+                lifecycleScope.launch {
+                    showFeed(!alreadyShowedFeedOnce)
+                }
                 alreadyShowedFeedOnce = true
             }
         }
@@ -179,7 +181,9 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
             binding.subRefresh.isRefreshing = true
             viewModel.isCurrentTabSubChannels = !viewModel.isCurrentTabSubChannels
 
-            if (viewModel.isCurrentTabSubChannels) showSubscriptions() else showFeed()
+            lifecycleScope.launch {
+                if (viewModel.isCurrentTabSubChannels) showSubscriptions() else showFeed()
+            }
 
             binding.subChannels.isVisible = viewModel.isCurrentTabSubChannels
             binding.subFeed.isGone = viewModel.isCurrentTabSubChannels
@@ -204,7 +208,10 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
 
         binding.channelGroups.setOnCheckedStateChangeListener { group, _ ->
             selectedFilterGroup = group.children.indexOfFirst { it.id == group.checkedChipId }
-            if (viewModel.isCurrentTabSubChannels) showSubscriptions() else showFeed()
+
+            lifecycleScope.launch {
+                if (viewModel.isCurrentTabSubChannels) showSubscriptions() else showFeed()
+            }
         }
 
         channelGroupsModel.groups.observe(viewLifecycleOwner) {
@@ -256,7 +263,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
                 selectedSortOrder = resultBundle.getInt(IntentData.sortOptions)
                 hideWatched = resultBundle.getBoolean(IntentData.hideWatched)
                 showUpcoming = resultBundle.getBoolean(IntentData.showUpcoming)
-                showFeed()
+                lifecycleScope.launch { showFeed() }
             }
 
             FilterSortBottomSheet()
@@ -283,7 +290,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         _binding = null
     }
 
-    private fun playByGroup(groupIndex: Int) {
+    private suspend fun playByGroup(groupIndex: Int) {
         val streams = viewModel.videoFeed.value.orEmpty()
             .filterByGroup(groupIndex)
             .let { DatabaseHelper.filterByStatusAndWatchPosition(it, hideWatched) }
@@ -306,7 +313,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
 
         binding.chipAll.isChecked = selectedFilterGroup == 0
         binding.chipAll.setOnLongClickListener {
-            playByGroup(0)
+            lifecycleScope.launch { playByGroup(0) }
             true
         }
 
@@ -321,7 +328,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
                 text = group.name
                 setOnLongClickListener {
                     // the index must be increased by one to skip the "all channels" group button
-                    playByGroup(index + 1)
+                    lifecycleScope.launch { playByGroup(index + 1) }
                     true
                 }
             }
@@ -360,7 +367,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         else -> this
     }
 
-    private fun showFeed(restoreScrollState: Boolean = true) {
+    private suspend fun showFeed(restoreScrollState: Boolean = true) {
         val binding = _binding ?: return
         val videoFeed = viewModel.videoFeed.value ?: return