Add filter to the feed group dialog to show only ungrouped subscriptions

app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionDAO.kt

@@ -22,10 +22,42 @@ abstract class SubscriptionDAO : BasicDAO<SubscriptionEntity> {
 
     @Query("""
         SELECT * FROM subscriptions
+
         WHERE name LIKE '%' || :filter || '%'
+
         ORDER BY name COLLATE NOCASE ASC
         """)
-    abstract fun filterByName(filter: String): Flowable<List<SubscriptionEntity>>
+    abstract fun getSubscriptionsFiltered(filter: String): Flowable<List<SubscriptionEntity>>
+
+    @Query("""
+        SELECT * FROM subscriptions s
+
+        LEFT JOIN feed_group_subscription_join fgs
+        ON s.uid = fgs.subscription_id
+
+        WHERE (fgs.subscription_id IS NULL OR fgs.group_id = :currentGroupId)
+
+        ORDER BY name COLLATE NOCASE ASC
+        """)
+    abstract fun getSubscriptionsOnlyUngrouped(
+        currentGroupId: Long
+    ): Flowable<List<SubscriptionEntity>>
+
+    @Query("""
+        SELECT * FROM subscriptions s
+
+        LEFT JOIN feed_group_subscription_join fgs
+        ON s.uid = fgs.subscription_id
+
+        WHERE (fgs.subscription_id IS NULL OR fgs.group_id = :currentGroupId)
+        AND s.name LIKE '%' || :filter || '%'
+
+        ORDER BY name COLLATE NOCASE ASC
+        """)
+    abstract fun getSubscriptionsOnlyUngroupedFiltered(
+        currentGroupId: Long,
+        filter: String
+    ): Flowable<List<SubscriptionEntity>>
 
     @Query("SELECT * FROM subscriptions WHERE url LIKE :url AND service_id = :serviceId")
     abstract fun getSubscriptionFlowable(serviceId: Int, url: String): Flowable<List<SubscriptionEntity>>

app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt

@@ -2,9 +2,11 @@ package org.schabi.newpipe.local.subscription
 
 import android.content.Context
 import io.reactivex.Completable
+import io.reactivex.Flowable
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
 import org.schabi.newpipe.NewPipeDatabase
+import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.database.subscription.SubscriptionDAO
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
 import org.schabi.newpipe.extractor.ListInfo
@@ -21,7 +23,24 @@ class SubscriptionManager(context: Context) {
     fun subscriptionTable(): SubscriptionDAO = subscriptionTable
     fun subscriptions() = subscriptionTable.all
 
-    fun filterByName(filter: String) = subscriptionTable.filterByName(filter)
+    fun getSubscriptions(
+        currentGroupId: Long = FeedGroupEntity.GROUP_ALL_ID,
+        filterQuery: String = "",
+        showOnlyUngrouped: Boolean = false
+    ): Flowable<List<SubscriptionEntity>> {
+        return when {
+            filterQuery.isNotEmpty() -> {
+                return if (showOnlyUngrouped) {
+                    subscriptionTable.getSubscriptionsOnlyUngroupedFiltered(
+                        currentGroupId, filterQuery)
+                } else {
+                    subscriptionTable.getSubscriptionsFiltered(filterQuery)
+                }
+            }
+            showOnlyUngrouped -> subscriptionTable.getSubscriptionsOnlyUngrouped(currentGroupId)
+            else -> subscriptionTable.all
+        }
+    }
 
     fun upsertAll(infoList: List<ChannelInfo>): List<SubscriptionEntity> {
         val listEntities = subscriptionTable.upsertAll(

app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt

@@ -65,6 +65,7 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     @State @JvmField var iconsListState: Parcelable? = null
     @State @JvmField var wasSearchSubscriptionsVisible = false
     @State @JvmField var subscriptionsCurrentSearchQuery = ""
+    @State @JvmField var subscriptionsShowOnlyUngrouped = false
 
     private val subscriptionMainSection = Section()
     private val subscriptionEmptyFooter = Section()
@@ -116,7 +117,7 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
 
         viewModel = ViewModelProvider(this,
             FeedGroupDialogViewModel.Factory(requireContext(),
-                groupId, subscriptionsCurrentSearchQuery)
+                groupId, subscriptionsCurrentSearchQuery, subscriptionsShowOnlyUngrouped)
         ).get(FeedGroupDialogViewModel::class.java)
 
         viewModel.groupLiveData.observe(viewLifecycleOwner, Observer(::handleGroup))
@@ -216,6 +217,16 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
             true
         }
 
+        headerMenu.findItem(R.id.feed_group_toggle_show_only_ungrouped_subscriptions).apply {
+            isChecked = subscriptionsShowOnlyUngrouped
+            setOnMenuItemClickListener {
+                subscriptionsShowOnlyUngrouped = !subscriptionsShowOnlyUngrouped
+                it.isChecked = subscriptionsShowOnlyUngrouped
+                viewModel.toggleShowOnlyUngrouped(subscriptionsShowOnlyUngrouped)
+                true
+            }
+        }
+
         toolbar_search_clear.setOnClickListener {
             if (TextUtils.isEmpty(toolbar_search_edit_text.text)) {
                 hideSearch()

app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt

@@ -20,24 +20,25 @@ import org.schabi.newpipe.local.subscription.item.PickerSubscriptionItem
 class FeedGroupDialogViewModel(
     applicationContext: Context,
     private val groupId: Long = FeedGroupEntity.GROUP_ALL_ID,
-    initialQuery: String = ""
+    initialQuery: String = "",
+    initialShowOnlyUngrouped: Boolean = false
 ) : ViewModel() {
 
     private var feedDatabaseManager: FeedDatabaseManager = FeedDatabaseManager(applicationContext)
     private var subscriptionManager = SubscriptionManager(applicationContext)
 
     private var filterSubscriptions = BehaviorProcessor.create<String>()
-    private var allSubscriptions = subscriptionManager.subscriptions()
+    private var toggleShowOnlyUngrouped = BehaviorProcessor.create<Boolean>()
 
-    private var subscriptionsFlowable = filterSubscriptions
-        .startWith(initialQuery)
+    private var subscriptionsFlowable = Flowable
+        .combineLatest(
+                filterSubscriptions.startWith(initialQuery),
+                toggleShowOnlyUngrouped.startWith(initialShowOnlyUngrouped),
+                BiFunction { t1: String, t2: Boolean -> Filter(t1, t2) }
+        )
         .distinctUntilChanged()
-        .switchMap { query ->
-            if (query.isEmpty()) {
-                allSubscriptions
-            } else {
-                subscriptionManager.filterByName(query)
-            }
+        .switchMap { filter ->
+            subscriptionManager.getSubscriptions(groupId, filter.query, filter.showOnlyUngrouped)
         }.map { list -> list.map { PickerSubscriptionItem(it) } }
 
     private val mutableGroupLiveData = MutableLiveData<FeedGroupEntity>()
@@ -100,20 +101,27 @@ class FeedGroupDialogViewModel(
         filterSubscriptions.onNext("")
     }
 
+    fun toggleShowOnlyUngrouped(showOnlyUngrouped: Boolean) {
+        toggleShowOnlyUngrouped.onNext(showOnlyUngrouped)
+    }
+
     sealed class DialogEvent {
         object ProcessingEvent : DialogEvent()
         object SuccessEvent : DialogEvent()
     }
 
+    data class Filter(val query: String, val showOnlyUngrouped: Boolean)
+
     class Factory(
         private val context: Context,
         private val groupId: Long = FeedGroupEntity.GROUP_ALL_ID,
-        private val initialQuery: String = ""
+        private val initialQuery: String = "",
+        private val initialShowOnlyUngrouped: Boolean = false
     ) : ViewModelProvider.Factory {
         @Suppress("UNCHECKED_CAST")
         override fun <T : ViewModel?> create(modelClass: Class<T>): T {
             return FeedGroupDialogViewModel(context.applicationContext,
-                groupId, initialQuery) as T
+                groupId, initialQuery, initialShowOnlyUngrouped) as T
         }
     }
 }

app/src/main/res/menu/menu_feed_group_dialog.xml

@@ -1,10 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
+<menu xmlns:tools="http://schemas.android.com/tools"
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <item
         android:id="@+id/action_search"
         android:icon="?attr/ic_search"
         android:title="@string/search"
-        app:showAsAction="always" />
+        app:showAsAction="always"
+        tools:ignore="AlwaysShowAction" />
+
+    <item
+        android:id="@+id/feed_group_toggle_show_only_ungrouped_subscriptions"
+        android:checkable="true"
+        android:checked="false"
+        android:title="@string/feed_group_show_only_ungrouped_subscriptions"
+        app:showAsAction="never" />
 </menu>

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

@@ -637,6 +637,7 @@
     <string name="feed_group_dialog_name_input">Name</string>
     <string name="feed_group_dialog_delete_message">Do you want to delete this group?</string>
     <string name="feed_create_new_group_button_title">New</string>
+    <string name="feed_group_show_only_ungrouped_subscriptions">Show only ungrouped subscriptions</string>
     <string name="settings_category_feed_title">Feed</string>
     <string name="feed_update_threshold_title">Feed update threshold</string>
     <string name="feed_update_threshold_summary">Time after last update before a subscription is considered outdated — %s</string>