added show watched items toggle preference

default sharedpreference is used to persist and retrieve show watched menu option toggle state

Author: iambaji

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -128,6 +128,7 @@ class FeedFragment : BaseStateFragment<FeedState>() {
 
         val factory = FeedViewModel.Factory(requireContext(), groupId, showPlayedItems)
         viewModel = ViewModelProvider(this, factory).get(FeedViewModel::class.java)
+        showPlayedItems = viewModel.getSavedPlayedItemsToggle()
         viewModel.stateLiveData.observe(viewLifecycleOwner, { it?.let(::handleResult) })
 
         groupAdapter = GroupieAdapter().apply {
@@ -158,7 +159,7 @@ class FeedFragment : BaseStateFragment<FeedState>() {
         }
     }
 
-    fun setupListViewMode() {
+    private fun setupListViewMode() {
         // does everything needed to setup the layouts for grid or list modes
         groupAdapter.spanCount = if (shouldUseGridLayout(context)) getGridSpanCountStreams(context) else 1
         feedBinding.itemsList.layoutManager = GridLayoutManager(requireContext(), groupAdapter.spanCount).apply {
@@ -213,6 +214,7 @@ class FeedFragment : BaseStateFragment<FeedState>() {
             showPlayedItems = !item.isChecked
             updateTogglePlayedItemsButton(item)
             viewModel.togglePlayedItems(showPlayedItems)
+            viewModel.savePlayedItemsToggle(showPlayedItems)
         }
 
         return super.onOptionsItemSelected(item)

app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt

@@ -1,10 +1,12 @@
 package org.schabi.newpipe.local.feed
 
 import android.content.Context
+import androidx.core.content.edit
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
+import androidx.preference.PreferenceManager
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import io.reactivex.rxjava3.core.Flowable
 import io.reactivex.rxjava3.functions.Function4
@@ -28,6 +30,10 @@ class FeedViewModel(
     initialShowPlayedItems: Boolean = true
 ) : ViewModel() {
     private var feedDatabaseManager: FeedDatabaseManager = FeedDatabaseManager(applicationContext)
+    private var sharedPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+    companion object {
+        const val SHOW_PLAYED_ITEMS_PREFERENCE = "show_played_items_preference_tag"
+    }
 
     private val toggleShowPlayedItems = BehaviorProcessor.create<Boolean>()
     private val streamItems = toggleShowPlayedItems
@@ -81,6 +87,13 @@ class FeedViewModel(
         toggleShowPlayedItems.onNext(showPlayedItems)
     }
 
+    fun savePlayedItemsToggle(showPlayedItems: Boolean) = sharedPreferences.edit {
+        this.putBoolean(SHOW_PLAYED_ITEMS_PREFERENCE, showPlayedItems)
+        this.apply()
+    }
+
+    fun getSavedPlayedItemsToggle() = sharedPreferences.getBoolean(SHOW_PLAYED_ITEMS_PREFERENCE, true)
+
     class Factory(
         private val context: Context,
         private val groupId: Long = FeedGroupEntity.GROUP_ALL_ID,