Now playing state management

app/src/main/java/code/name/monkey/retromusic/activities/base/AbsSlidingMusicPanelActivity.kt

@@ -9,7 +9,7 @@ import android.widget.FrameLayout
 import androidx.annotation.LayoutRes
 import androidx.core.view.ViewCompat
 import androidx.core.view.isVisible
-import androidx.lifecycle.Observer
+import androidx.transition.TransitionManager
 import code.name.monkey.appthemehelper.util.ATHUtil
 import code.name.monkey.appthemehelper.util.ColorUtil
 import code.name.monkey.retromusic.R
@@ -22,6 +22,7 @@ import code.name.monkey.retromusic.fragments.NowPlayingScreen
 import code.name.monkey.retromusic.fragments.NowPlayingScreen.*
 import code.name.monkey.retromusic.helper.MusicPlayerRemote
 import code.name.monkey.retromusic.model.CategoryInfo
+import code.name.monkey.retromusic.state.NowPlayingPanelState.*
 import code.name.monkey.retromusic.util.PreferenceUtil
 import code.name.monkey.retromusic.views.BottomNavigationBarTinted
 import com.google.android.material.bottomsheet.BottomSheetBehavior
@@ -75,13 +76,11 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity() {
         setupSlidingUpPanel()
 
         setupBottomSheet()
-
+        updatePanelState()
-        libraryViewModel.paletteColorLiveData.observe(this, Observer {
+        updateColor()
-            this.paletteColor = it
-            onPaletteColorChanged()
-        })
     }
 
+
     fun getBottomSheetBehavior() = behavior
 
     private fun setupBottomSheet() {
@@ -201,7 +200,11 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity() {
                 ViewTreeObserver.OnGlobalLayoutListener {
                 override fun onGlobalLayout() {
                     slidingPanel.viewTreeObserver.removeOnGlobalLayoutListener(this)
-                    hideBottomBar(false)
+                    if (bottomNavigationView.isVisible) {
+                        libraryViewModel.setPanelState(COLLAPSED_WITH)
+                    } else {
+                        libraryViewModel.setPanelState(COLLAPSED_WITHOUT)
+                    }
                 }
             })
         } // don't call hideBottomBar(true) here as it causes a bug with the SlidingUpPanelLayout
@@ -209,7 +212,16 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity() {
 
     override fun onQueueChanged() {
         super.onQueueChanged()
-        hideBottomBar(MusicPlayerRemote.playingQueue.isEmpty())
+        val isEmpty = MusicPlayerRemote.playingQueue.isEmpty()
+        if (isEmpty) {
+            libraryViewModel.setPanelState(HIDE)
+        } else {
+            if (bottomNavigationView.isVisible) {
+                libraryViewModel.setPanelState(EXPAND)
+            } else {
+                libraryViewModel.setPanelState(COLLAPSED_WITHOUT)
+            }
+        }
     }
 
     override fun onBackPressed() {
@@ -308,4 +320,59 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity() {
             bottomNavigationView.hide()
         }
     }
+
+    private fun updateColor() {
+        libraryViewModel.paletteColor.observe(this, { color ->
+            this.paletteColor = color
+            onPaletteColorChanged()
+        })
+    }
+
+    private fun updatePanelState() {
+        libraryViewModel.panelState.observe(this, { state ->
+            when (state) {
+                EXPAND -> {
+                    println("EXPAND")
+                    expandPanel()
+                }
+                HIDE -> {
+                    println("HIDE")
+                    behavior.isHideable = true
+                    behavior.peekHeight = 0
+                    collapsePanel()
+                    ViewCompat.setElevation(slidingPanel, 0f)
+                    ViewCompat.setElevation(bottomNavigationView, 10f)
+                }
+                COLLAPSED_WITH -> {
+                    println("COLLAPSED_WITH")
+                    TransitionManager.beginDelayedTransition(mainContent)
+                    bottomNavigationView.isVisible = true
+                    val heightOfBar = bottomNavigationView.height
+                    ViewCompat.setElevation(bottomNavigationView, 10f)
+                    ViewCompat.setElevation(slidingPanel, 10f)
+                    behavior.isHideable = false
+                    behavior.peekHeight = (heightOfBar * 2) - 24
+                }
+                COLLAPSED_WITHOUT -> {
+                    println("COLLAPSED_WITHOUT")
+                    TransitionManager.beginDelayedTransition(mainContent)
+                    TransitionManager.beginDelayedTransition(slidingPanel)
+                    val heightOfBar = bottomNavigationView.height
+                    bottomNavigationView.isVisible = false
+                    ViewCompat.setElevation(bottomNavigationView, 10f)
+                    ViewCompat.setElevation(slidingPanel, 10f)
+                    behavior.isHideable = false
+                    behavior.peekHeight = heightOfBar - 24
+                }
+                else -> {
+                    println("ELSE")
+                    behavior.isHideable = true
+                    behavior.peekHeight = 0
+                    collapsePanel()
+                    ViewCompat.setElevation(slidingPanel, 0f)
+                    ViewCompat.setElevation(bottomNavigationView, 10f)
+                }
+            }
+        })
+    }
 }

app/src/main/java/code/name/monkey/retromusic/fragments/DetailListFragment.kt

@@ -4,7 +4,6 @@ import android.os.Bundle
 import android.view.View
 import android.widget.ImageView
 import androidx.lifecycle.Observer
-import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -18,23 +17,19 @@ import code.name.monkey.retromusic.fragments.artists.ArtistClickListener
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import code.name.monkey.retromusic.model.Album
 import code.name.monkey.retromusic.model.Artist
-import code.name.monkey.retromusic.repository.RealRepository
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import kotlinx.android.synthetic.main.fragment_playlist_detail.*
-import kotlinx.coroutines.Dispatchers.IO
+import org.koin.androidx.viewmodel.ext.android.sharedViewModel
-import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
-import org.koin.android.ext.android.inject
 
 class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_detail),
     ArtistClickListener, AlbumClickListener {
     private val args by navArgs<DetailListFragmentArgs>()
-    private val repository by inject<RealRepository>()
+    private val libraryViewModel by sharedViewModel<LibraryViewModel>()
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
+        libraryViewModel.setPanelState(NowPlayingPanelState.COLLAPSED_WITHOUT)
         mainActivity.setSupportActionBar(toolbar)
-        mainActivity.hideBottomBarVisibility(false)
         progressIndicator.hide()
         when (args.type) {
             TOP_ARTISTS -> {
@@ -67,10 +62,9 @@ class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_de
             adapter = songAdapter
             layoutManager = linearLayoutManager()
         }
-        lifecycleScope.launch(IO) {
+        libraryViewModel.recentSongs().observe(viewLifecycleOwner, Observer { songs ->
-            val songs = repository.recentSongs()
+            songAdapter.swapDataSet(songs)
-            withContext(Main) { songAdapter.swapDataSet(songs) }
+        })
-        }
     }
 
     private fun topPlayed() {
@@ -84,12 +78,10 @@ class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_de
             adapter = songAdapter
             layoutManager = linearLayoutManager()
         }
-        lifecycleScope.launch(IO) {
+        libraryViewModel.playCountSongs().observe(viewLifecycleOwner, Observer { songs ->
-            val songs = repository.playCountSongs().map {
+            songAdapter.swapDataSet(songs)
-                it.toSong()
+        })
-            }
+
-            withContext(Main) { songAdapter.swapDataSet(songs) }
-        }
     }
 
     private fun loadHistory() {
@@ -104,7 +96,7 @@ class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_de
             adapter = songAdapter
             layoutManager = linearLayoutManager()
         }
-        repository.observableHistorySongs().observe(viewLifecycleOwner, Observer {
+        libraryViewModel.observableHistorySongs().observe(viewLifecycleOwner, Observer {
             val songs = it.map { historyEntity -> historyEntity.toSong() }
             songAdapter.swapDataSet(songs)
         })
@@ -121,8 +113,7 @@ class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_de
             adapter = songAdapter
             layoutManager = linearLayoutManager()
         }
-        repository.favorites().observe(viewLifecycleOwner, Observer {
+        libraryViewModel.favorites().observe(viewLifecycleOwner, {
-            println(it.size)
             val songs = it.map { songEntity -> songEntity.toSong() }
             songAdapter.swapDataSet(songs)
         })
@@ -130,31 +121,22 @@ class DetailListFragment : AbsMainActivityFragment(R.layout.fragment_playlist_de
 
     private fun loadArtists(title: Int, type: Int) {
         toolbar.setTitle(title)
-        lifecycleScope.launch(IO) {
+        libraryViewModel.artists(type).observe(viewLifecycleOwner, { artists ->
-            val artists =
-                if (type == TOP_ARTISTS) repository.topArtists() else repository.recentArtists()
-            withContext(Main) {
             recyclerView.apply {
                 adapter = artistAdapter(artists)
                 layoutManager = gridLayoutManager()
             }
-            }
+        })
-        }
     }
 
     private fun loadAlbums(title: Int, type: Int) {
         toolbar.setTitle(title)
-        lifecycleScope.launch(IO) {
+        libraryViewModel.albums(type).observe(viewLifecycleOwner, { albums ->
-            val albums =
-                if (type == TOP_ALBUMS) repository.topAlbums() else repository.recentAlbums()
-            withContext(Main) {
             recyclerView.apply {
                 adapter = albumAdapter(albums)
                 layoutManager = gridLayoutManager()
-
-                }
-            }
             }
+        })
     }
 
     private fun artistAdapter(artists: List<Artist>): ArtistAdapter = ArtistAdapter(

app/src/main/java/code/name/monkey/retromusic/fragments/LibraryViewModel.kt

@@ -1,17 +1,20 @@
 package code.name.monkey.retromusic.fragments
 
-import androidx.lifecycle.LiveData
+import androidx.lifecycle.*
-import androidx.lifecycle.MutableLiveData
+import code.name.monkey.retromusic.RECENT_ALBUMS
-import androidx.lifecycle.ViewModel
+import code.name.monkey.retromusic.RECENT_ARTISTS
-import androidx.lifecycle.viewModelScope
+import code.name.monkey.retromusic.TOP_ALBUMS
+import code.name.monkey.retromusic.TOP_ARTISTS
 import code.name.monkey.retromusic.db.PlaylistEntity
 import code.name.monkey.retromusic.db.PlaylistWithSongs
 import code.name.monkey.retromusic.db.SongEntity
+import code.name.monkey.retromusic.db.toSong
 import code.name.monkey.retromusic.fragments.ReloadType.*
 import code.name.monkey.retromusic.helper.MusicPlayerRemote
 import code.name.monkey.retromusic.interfaces.MusicServiceEventListener
 import code.name.monkey.retromusic.model.*
 import code.name.monkey.retromusic.repository.RealRepository
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.launch
 
@@ -19,7 +22,7 @@ class LibraryViewModel(
     private val repository: RealRepository
 ) : ViewModel(), MusicServiceEventListener {
 
-    private val paletteColor = MutableLiveData<Int>()
+    private val _paletteColor = MutableLiveData<Int>()
     private val albums = MutableLiveData<List<Album>>()
     private val songs = MutableLiveData<List<Song>>()
     private val artists = MutableLiveData<List<Artist>>()
@@ -28,12 +31,17 @@ class LibraryViewModel(
     private val genres = MutableLiveData<List<Genre>>()
     private val home = MutableLiveData<List<Home>>()
 
-    val paletteColorLiveData: LiveData<Int> = paletteColor
+    val paletteColor: LiveData<Int> = _paletteColor
+    val panelState: MutableLiveData<NowPlayingPanelState> = MutableLiveData<NowPlayingPanelState>()
 
     init {
         fetchHomeSections()
     }
 
+    fun setPanelState(state: NowPlayingPanelState) {
+        panelState.postValue(state)
+    }
+
     private fun loadLibraryContent() = viewModelScope.launch(IO) {
         fetchHomeSections()
         fetchSongs()
@@ -132,7 +140,7 @@ class LibraryViewModel(
     }
 
     fun updateColor(newColor: Int) {
-        paletteColor.postValue(newColor)
+        _paletteColor.postValue(newColor)
     }
 
     override fun onMediaStoreChanged() {
@@ -232,6 +240,38 @@ class LibraryViewModel(
         fetchPlaylists()
         loadLibraryContent()
     }
+
+    fun recentSongs(): LiveData<List<Song>> = liveData {
+        emit(repository.recentSongs())
+    }
+
+    fun playCountSongs(): LiveData<List<Song>> = liveData {
+        emit(repository.playCountSongs().map {
+            it.toSong()
+        })
+    }
+
+    fun observableHistorySongs() = repository.observableHistorySongs()
+
+    fun favorites() = repository.favorites()
+
+    fun artists(type: Int): LiveData<List<Artist>> = liveData {
+        when (type) {
+            TOP_ARTISTS -> emit(repository.topArtists())
+            RECENT_ARTISTS -> {
+                emit(repository.recentArtists())
+            }
+        }
+    }
+
+    fun albums(type: Int): LiveData<List<Album>> = liveData {
+        when (type) {
+            TOP_ALBUMS -> emit(repository.topAlbums())
+            RECENT_ALBUMS -> {
+                emit(repository.recentAlbums())
+            }
+        }
+    }
 }
 
 enum class ReloadType {

app/src/main/java/code/name/monkey/retromusic/fragments/albums/AlbumDetailsFragment.kt

@@ -29,6 +29,7 @@ import code.name.monkey.retromusic.dialogs.DeleteSongsDialog
 import code.name.monkey.retromusic.extensions.applyColor
 import code.name.monkey.retromusic.extensions.applyOutlineColor
 import code.name.monkey.retromusic.extensions.show
+import code.name.monkey.retromusic.fragments.LibraryViewModel
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import code.name.monkey.retromusic.glide.AlbumGlideRequest
 import code.name.monkey.retromusic.glide.ArtistGlideRequest
@@ -41,6 +42,7 @@ import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.network.Result
 import code.name.monkey.retromusic.network.model.LastFmAlbum
 import code.name.monkey.retromusic.repository.RealRepository
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import code.name.monkey.retromusic.util.MusicUtil
 import code.name.monkey.retromusic.util.PreferenceUtil
 import code.name.monkey.retromusic.util.RetroUtil
@@ -52,6 +54,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.koin.android.ext.android.get
+import org.koin.androidx.viewmodel.ext.android.sharedViewModel
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 import java.util.*
@@ -63,6 +66,7 @@ class AlbumDetailsFragment : AbsMainActivityFragment(R.layout.fragment_album_det
     private val detailsViewModel by viewModel<AlbumDetailsViewModel> {
         parametersOf(arguments.extraAlbumId)
     }
+    private val libraryViewModel by sharedViewModel<LibraryViewModel>()
 
     private lateinit var simpleSongAdapter: SimpleSongAdapter
     private lateinit var album: Album
@@ -73,7 +77,7 @@ class AlbumDetailsFragment : AbsMainActivityFragment(R.layout.fragment_album_det
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         setHasOptionsMenu(true)
-        mainActivity.hideBottomBarVisibility(false)
+        libraryViewModel.setPanelState(NowPlayingPanelState.COLLAPSED_WITHOUT)
         mainActivity.addMusicServiceEventListener(detailsViewModel)
         mainActivity.setSupportActionBar(toolbar)
         toolbar.title = " "

app/src/main/java/code/name/monkey/retromusic/fragments/artists/ArtistDetailsFragment.kt

@@ -27,6 +27,7 @@ import code.name.monkey.retromusic.extensions.applyColor
 import code.name.monkey.retromusic.extensions.applyOutlineColor
 import code.name.monkey.retromusic.extensions.show
 import code.name.monkey.retromusic.extensions.showToast
+import code.name.monkey.retromusic.fragments.LibraryViewModel
 import code.name.monkey.retromusic.fragments.albums.AlbumClickListener
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import code.name.monkey.retromusic.glide.ArtistGlideRequest
@@ -36,6 +37,7 @@ import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.network.Result
 import code.name.monkey.retromusic.network.model.LastFmArtist
 import code.name.monkey.retromusic.repository.RealRepository
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import code.name.monkey.retromusic.util.CustomArtistImageUtil
 import code.name.monkey.retromusic.util.MusicUtil
 import code.name.monkey.retromusic.util.PreferenceUtil
@@ -47,6 +49,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.koin.android.ext.android.get
+import org.koin.androidx.viewmodel.ext.android.sharedViewModel
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 import java.util.*
@@ -58,7 +61,7 @@ class ArtistDetailsFragment : AbsMainActivityFragment(R.layout.fragment_artist_d
     private val detailsViewModel: ArtistDetailsViewModel by viewModel {
         parametersOf(arguments.extraArtistId)
     }
-
+    private val libraryViewModel by sharedViewModel<LibraryViewModel>()
     private lateinit var artist: Artist
     private lateinit var songAdapter: SimpleSongAdapter
     private lateinit var albumAdapter: HorizontalAlbumAdapter
@@ -70,17 +73,17 @@ class ArtistDetailsFragment : AbsMainActivityFragment(R.layout.fragment_artist_d
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         setHasOptionsMenu(true)
+        libraryViewModel.setPanelState(NowPlayingPanelState.COLLAPSED_WITHOUT)
         mainActivity.setSupportActionBar(toolbar)
-        mainActivity.hideBottomBarVisibility(false)
+
         toolbar.title = null
         setupRecyclerView()
+
         postponeEnterTransition()
         detailsViewModel.getArtist().observe(viewLifecycleOwner, Observer {
-            showArtist(it)
             startPostponedEnterTransition()
+            showArtist(it)
         })
-
-
         playAction.apply {
             setOnClickListener { MusicPlayerRemote.openQueue(artist.songs, 0, true) }
         }

app/src/main/java/code/name/monkey/retromusic/fragments/genres/GenreDetailsFragment.kt

@@ -12,11 +12,14 @@ import androidx.recyclerview.widget.RecyclerView
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.song.SongAdapter
 import code.name.monkey.retromusic.extensions.dipToPix
+import code.name.monkey.retromusic.fragments.LibraryViewModel
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import code.name.monkey.retromusic.helper.menu.GenreMenuHelper
 import code.name.monkey.retromusic.model.Genre
 import code.name.monkey.retromusic.model.Song
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import kotlinx.android.synthetic.main.fragment_playlist_detail.*
+import org.koin.androidx.viewmodel.ext.android.sharedViewModel
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 import java.util.*
@@ -26,7 +29,7 @@ class GenreDetailsFragment : AbsMainActivityFragment(R.layout.fragment_playlist_
     private val detailsViewModel: GenreDetailsViewModel by viewModel {
         parametersOf(arguments.extraGenre)
     }
-
+    private val libraryViewModel by sharedViewModel<LibraryViewModel>()
     private lateinit var genre: Genre
     private lateinit var songAdapter: SongAdapter
 
@@ -35,7 +38,7 @@ class GenreDetailsFragment : AbsMainActivityFragment(R.layout.fragment_playlist_
         setHasOptionsMenu(true)
         mainActivity.addMusicServiceEventListener(detailsViewModel)
         mainActivity.setSupportActionBar(toolbar)
-        mainActivity.hideBottomBarVisibility(false)
+        libraryViewModel.setPanelState(NowPlayingPanelState.COLLAPSED_WITHOUT)
         progressIndicator.hide()
         setupRecyclerView()
         detailsViewModel.getSongs().observe(viewLifecycleOwner, androidx.lifecycle.Observer {

app/src/main/java/code/name/monkey/retromusic/fragments/playlists/PlaylistDetailsFragment.kt

@@ -14,14 +14,17 @@ import code.name.monkey.retromusic.adapter.song.SongAdapter
 import code.name.monkey.retromusic.db.PlaylistWithSongs
 import code.name.monkey.retromusic.db.toSongs
 import code.name.monkey.retromusic.extensions.dipToPix
+import code.name.monkey.retromusic.fragments.LibraryViewModel
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import code.name.monkey.retromusic.helper.menu.PlaylistMenuHelper
 import code.name.monkey.retromusic.model.Song
+import code.name.monkey.retromusic.state.NowPlayingPanelState
 import code.name.monkey.retromusic.util.PlaylistsUtil
 import com.h6ah4i.android.widget.advrecyclerview.animator.RefactoredDefaultItemAnimator
 import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropManager
 import com.h6ah4i.android.widget.advrecyclerview.utils.WrapperAdapterUtils
 import kotlinx.android.synthetic.main.fragment_playlist_detail.*
+import org.koin.androidx.viewmodel.ext.android.sharedViewModel
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
@@ -30,7 +33,7 @@ class PlaylistDetailsFragment : AbsMainActivityFragment(R.layout.fragment_playli
     private val viewModel: PlaylistDetailsViewModel by viewModel {
         parametersOf(arguments.extraPlaylist)
     }
-
+    private val libraryViewModel by sharedViewModel<LibraryViewModel>()
     private lateinit var playlist: PlaylistWithSongs
     private lateinit var adapter: SongAdapter
 
@@ -40,9 +43,9 @@ class PlaylistDetailsFragment : AbsMainActivityFragment(R.layout.fragment_playli
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         setHasOptionsMenu(true)
+        libraryViewModel.setPanelState(NowPlayingPanelState.COLLAPSED_WITHOUT)
         mainActivity.addMusicServiceEventListener(viewModel)
         mainActivity.setSupportActionBar(toolbar)
-        mainActivity.hideBottomBarVisibility(false)
 
         playlist = arguments.extraPlaylist
         toolbar.title = playlist.playlistEntity.playlistName

app/src/main/java/code/name/monkey/retromusic/fragments/search/SearchViewModel.kt

@@ -15,6 +15,6 @@ class SearchViewModel(private val realRepository: RealRepository) : ViewModel()
 
     fun search(query: String?) = viewModelScope.launch(IO) {
         val result = realRepository.search(query)
-        results.value = result
+        results.postValue(result)
     }
 }

app/src/main/java/code/name/monkey/retromusic/state/NowPlayingPanelState.kt

@@ -0,0 +1,8 @@
+package code.name.monkey.retromusic.state
+
+enum class NowPlayingPanelState {
+    EXPAND,
+    COLLAPSED_WITH,
+    COLLAPSED_WITHOUT,
+    HIDE,
+}