Update.

app/src/main/java/com/github/apognu/otter/Otter.kt

@@ -2,12 +2,14 @@ package com.github.apognu.otter
 
 import android.app.Application
 import android.content.Context
+import android.widget.SearchView
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.room.Room
 import com.github.apognu.otter.activities.MainActivity
 import com.github.apognu.otter.activities.SearchActivity
 import com.github.apognu.otter.adapters.*
 import com.github.apognu.otter.fragments.*
+import com.github.apognu.otter.models.Mediator
 import com.github.apognu.otter.models.dao.OtterDatabase
 import com.github.apognu.otter.playback.MediaSession
 import com.github.apognu.otter.playback.QueueManager.Companion.factory
@@ -105,9 +107,6 @@ class Otter : Application() {
           }
         }
 
-        factory { MainActivity() }
-        factory { SearchActivity(get(), get()) }
-
         fragment { BrowseFragment() }
         fragment { LandscapeQueueFragment() }
 
@@ -115,7 +114,7 @@ class Otter : Application() {
 
         single { ArtistsRepository(get(), get()) }
         factory { (id: Int) -> ArtistTracksRepository(get(), get(), id) }
-        viewModel { ArtistsViewModel(get()) }
+        viewModel { ArtistsViewModel(get(), get()) }
         factory { (context: Context?, listener: ArtistsFragment.OnArtistClickListener) -> ArtistsAdapter(context, listener) }
 
         factory { (id: Int?) -> AlbumsRepository(get(), get(), id) }
@@ -145,6 +144,13 @@ class Otter : Application() {
 
         single { (scope: CoroutineScope) -> QueueRepository(get(), scope) }
         viewModel { QueueViewModel(get(), get()) }
+
+        viewModel { SearchViewModel(get(), get(), get()) }
+        single { ArtistsSearchRepository(get(), get()) }
+        single { AlbumsSearchRepository(get(), get { parametersOf(null) }) }
+        single { TracksSearchRepository(get(), get { parametersOf(null) }) }
+
+        single { Mediator(get(), get(), get()) }
       })
     }
 

app/src/main/java/com/github/apognu/otter/activities/SearchActivity.kt

@@ -4,40 +4,30 @@ import android.os.Bundle
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.observe
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.SearchAdapter
 import com.github.apognu.otter.fragments.AlbumsFragment
 import com.github.apognu.otter.fragments.ArtistsFragment
 import com.github.apognu.otter.models.dao.OtterDatabase
-import com.github.apognu.otter.models.dao.toDao
 import com.github.apognu.otter.models.domain.Album
 import com.github.apognu.otter.models.domain.Artist
-import com.github.apognu.otter.models.domain.Track
-import com.github.apognu.otter.repositories.AlbumsSearchRepository
-import com.github.apognu.otter.repositories.ArtistsSearchRepository
 import com.github.apognu.otter.repositories.FavoritesRepository
-import com.github.apognu.otter.repositories.TracksSearchRepository
+import com.github.apognu.otter.viewmodels.SearchViewModel
-import com.github.apognu.otter.utils.Event
-import com.github.apognu.otter.utils.EventBus
-import com.github.apognu.otter.utils.untilNetwork
-import com.google.android.exoplayer2.offline.Download
 import kotlinx.android.synthetic.main.activity_search.*
-import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import org.koin.android.ext.android.inject
+import org.koin.androidx.viewmodel.ext.android.viewModel
 import java.net.URLEncoder
-import java.util.*
 
-class SearchActivity(private val database: OtterDatabase, private val favoritesRepository: FavoritesRepository) : AppCompatActivity() {
+class SearchActivity : AppCompatActivity() {
+  private val viewModel by viewModel<SearchViewModel>()
+  private val favoritesRepository by inject<FavoritesRepository>()
+
   private lateinit var adapter: SearchAdapter
 
-  lateinit var artistsRepository: ArtistsSearchRepository
-  lateinit var albumsRepository: AlbumsSearchRepository
-  lateinit var tracksRepository: TracksSearchRepository
-
   var done = 0
 
   override fun onCreate(savedInstanceState: Bundle?) {
@@ -51,23 +41,41 @@ class SearchActivity(private val database: OtterDatabase, private val favoritesR
     }
 
     search.requestFocus()
+
+    viewModel.artists.observe(this) { artists ->
+      if (adapter.artists.size != artists.size) done++
+
+      adapter.artists = artists.toMutableSet()
+
+      lifecycleScope.launch(Main) {
+        refresh()
+      }
+    }
+
+    viewModel.albums.observe(this) { albums ->
+      if (adapter.albums.size != albums.size) done++
+
+      adapter.albums = albums.toMutableSet()
+
+      lifecycleScope.launch(Main) {
+        refresh()
+      }
+    }
+
+    viewModel.tracks.observe(this) { tracks ->
+      if (adapter.tracks.size != tracks.size) done++
+
+      adapter.tracks = tracks.toMutableSet()
+
+      lifecycleScope.launch(Main) {
+        refresh()
+      }
+    }
   }
 
   override fun onResume() {
     super.onResume()
 
-    lifecycleScope.launch(IO) {
-      EventBus.get().collect { message ->
-        when (message) {
-          is Event.DownloadChanged -> refreshDownloadedTrack(message.download)
-        }
-      }
-    }
-
-    artistsRepository = ArtistsSearchRepository(this@SearchActivity, "")
-    albumsRepository = AlbumsSearchRepository(this@SearchActivity, "")
-    tracksRepository = TracksSearchRepository(this@SearchActivity, "")
-
     search.setOnQueryTextListener(object : androidx.appcompat.widget.SearchView.OnQueryTextListener {
       override fun onQueryTextSubmit(rawQuery: String?): Boolean {
         search.clearFocus()
@@ -75,68 +83,18 @@ class SearchActivity(private val database: OtterDatabase, private val favoritesR
         rawQuery?.let {
           done = 0
 
-          val query = URLEncoder.encode(it, "UTF-8")
-
-          artistsRepository.query = query.toLowerCase(Locale.ROOT)
-          albumsRepository.query = query.toLowerCase(Locale.ROOT)
-          tracksRepository.query = query.toLowerCase(Locale.ROOT)
-
-          search_spinner.visibility = View.VISIBLE
-          search_empty.visibility = View.GONE
-          search_no_results.visibility = View.GONE
-
           adapter.artists.clear()
           adapter.albums.clear()
           adapter.tracks.clear()
           adapter.notifyDataSetChanged()
 
-          artistsRepository.fetch().untilNetwork(lifecycleScope, IO) { artists, _, _ ->
+          val query = URLEncoder.encode(it, "UTF-8")
-            done++
 
-            artists.forEach {
+          viewModel.search(query)
-              database.artists().run {
-                insert(it.toDao())
 
-                adapter.artists.add(Artist.fromDecoratedEntity(getDecoratedBlocking(it.id)))
+          search_spinner.visibility = View.VISIBLE
-              }
+          search_empty.visibility = View.GONE
-            }
+          search_no_results.visibility = View.GONE
-
-            lifecycleScope.launch(Main) {
-              refresh()
-            }
-          }
-
-          albumsRepository.fetch().untilNetwork(lifecycleScope, IO) { albums, _, _ ->
-            done++
-
-            albums.forEach {
-              database.albums().run {
-                insert(it.toDao())
-
-                adapter.albums.add(Album.fromDecoratedEntity(getDecoratedBlocking(it.id)))
-              }
-            }
-
-            lifecycleScope.launch(Main) {
-              refresh()
-            }
-          }
-
-          tracksRepository.fetch().untilNetwork(lifecycleScope, IO) { tracks, _, _ ->
-            done++
-
-            tracks.forEach {
-              database.tracks().run {
-                insertWithAssocs(database.artists(), database.albums(), database.uploads(), it)
-
-                adapter.tracks.add(Track.fromDecoratedEntity(getDecoratedBlocking(it.id)))
-              }
-            }
-
-            lifecycleScope.launch(Main) {
-              refresh()
-            }
-          }
         }
 
         return true
@@ -160,19 +118,6 @@ class SearchActivity(private val database: OtterDatabase, private val favoritesR
     }
   }
 
-  private suspend fun refreshDownloadedTrack(download: Download) {
-    if (download.state == Download.STATE_COMPLETED) {
-      /* download.getMetadata()?.let { info ->
-        adapter.tracks.withIndex().associate { it.value to it.index }.filter { it.key.id == info.id }.toList().getOrNull(0)?.let { match ->
-          withContext(Dispatchers.Main) {
-            adapter.tracks[match.second].downloaded = true
-            adapter.notifyItemChanged(adapter.getPositionOf(SearchAdapter.ResultType.Track, match.second))
-          }
-        }
-      } */
-    }
-  }
-
   inner class SearchResultClickListener : SearchAdapter.OnSearchResultClickListener {
     override fun onArtistClick(holder: View?, artist: Artist) {
       ArtistsFragment.openAlbums(this@SearchActivity, artist)

app/src/main/java/com/github/apognu/otter/adapters/ArtistsAdapter.kt

@@ -4,24 +4,30 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.paging.PagingDataAdapter
+import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
-import com.github.apognu.otter.fragments.OtterAdapter
+import com.github.apognu.otter.models.domain.Artist
 import com.github.apognu.otter.utils.maybeLoad
 import com.github.apognu.otter.utils.maybeNormalizeUrl
-import com.github.apognu.otter.models.domain.Artist
 import com.squareup.picasso.Picasso
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.row_artist.view.*
 
-class ArtistsAdapter(val context: Context?, private val listener: OnArtistClickListener) : OtterAdapter<Artist, ArtistsAdapter.ViewHolder>() {
+val DIFF = object : DiffUtil.ItemCallback<Artist>() {
+  override fun areContentsTheSame(oldItem: Artist, newItem: Artist) = oldItem == newItem
+  override fun areItemsTheSame(oldItem: Artist, newItem: Artist) = oldItem.id == newItem.id
+}
+
+class ArtistsAdapter(val context: Context?, private val listener: OnArtistClickListener) : PagingDataAdapter<Artist, ArtistsAdapter.ViewHolder>(DIFF) {
   interface OnArtistClickListener {
     fun onClick(holder: View?, artist: Artist)
   }
 
-  override fun getItemCount() = data.size
+  // override fun getItemCount() = data.size
 
-  override fun getItemId(position: Int) = data[position].id.toLong()
+  // override fun getItemId(position: Int) = data[position].id.toLong()
 
   override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
     val view = LayoutInflater.from(context).inflate(R.layout.row_artist, parent, false)
@@ -32,7 +38,7 @@ class ArtistsAdapter(val context: Context?, private val listener: OnArtistClickL
   }
 
   override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-    val artist = data[position]
+    val artist = getItem(position)!!
 
     Picasso.get()
       .maybeLoad(maybeNormalizeUrl(artist.album_cover))
@@ -50,7 +56,7 @@ class ArtistsAdapter(val context: Context?, private val listener: OnArtistClickL
     val albums = view.albums
 
     override fun onClick(view: View?) {
-      data[layoutPosition].let { artist ->
+      getItem(layoutPosition)?.let { artist ->
         listener.onClick(view, artist)
       }
     }

app/src/main/java/com/github/apognu/otter/adapters/PlaylistsAdapter.kt

@@ -8,6 +8,7 @@ import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.models.dao.PlaylistEntity
 import com.github.apognu.otter.fragments.OtterAdapter
+import com.github.apognu.otter.utils.maybeNormalizeUrl
 import com.github.apognu.otter.utils.toDurationString
 import com.squareup.picasso.Picasso
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
@@ -54,7 +55,7 @@ class PlaylistsAdapter(val context: Context?, private val listener: OnPlaylistCl
       }
 
       Picasso.get()
-        .load(url)
+        .load(maybeNormalizeUrl(url))
         .transform(RoundedCornersTransformation(32, 0, corner))
         .into(imageView)
     }

app/src/main/java/com/github/apognu/otter/adapters/SearchAdapter.kt

@@ -13,7 +13,6 @@ import android.view.ViewGroup
 import androidx.appcompat.widget.PopupMenu
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
-import com.github.apognu.otter.models.api.FunkwhaleTrack
 import com.github.apognu.otter.utils.*
 import com.github.apognu.otter.models.domain.Album
 import com.github.apognu.otter.models.domain.Artist
@@ -41,11 +40,9 @@ class SearchAdapter(private val context: Context?, private val listener: OnSearc
 
   val SECTION_COUNT = 3
 
-  var artists: MutableList<Artist> = mutableListOf()
+  var artists: MutableSet<Artist> = mutableSetOf()
-  var albums: MutableList<Album> = mutableListOf()
+  var albums: MutableSet<Album> = mutableSetOf()
-  var tracks: MutableList<Track> = mutableListOf()
+  var tracks: MutableSet<Track> = mutableSetOf()
-
-  var currentTrack: FunkwhaleTrack? = null
 
   override fun getItemCount() = SECTION_COUNT + artists.size + albums.size + tracks.size
 
@@ -57,9 +54,9 @@ class SearchAdapter(private val context: Context?, private val listener: OnSearc
         return -3
       }
 
-      ResultType.Artist.ordinal -> artists[position].id.toLong()
+      ResultType.Artist.ordinal -> artists.elementAt(position).id.toLong()
-      ResultType.Artist.ordinal -> albums[position - artists.size - 2].id.toLong()
+      ResultType.Artist.ordinal -> albums.elementAt(position - artists.size - 2).id.toLong()
-      ResultType.Track.ordinal -> tracks[position - artists.size - albums.size - SECTION_COUNT].id.toLong()
+      ResultType.Track.ordinal -> tracks.elementAt(position - artists.size - albums.size - SECTION_COUNT).id.toLong()
       else -> 0
     }
   }
@@ -134,19 +131,19 @@ class SearchAdapter(private val context: Context?, private val listener: OnSearc
         holder.actions.visibility = View.GONE
         holder.favorite.visibility = View.GONE
 
-        artists[position - 1]
+        artists.elementAt(position - 1)
       }
 
       ResultType.Album.ordinal -> {
         holder.actions.visibility = View.GONE
         holder.favorite.visibility = View.GONE
 
-        albums[position - artists.size - 2]
+        albums.elementAt(position - artists.size - 2)
       }
 
-      ResultType.Track.ordinal -> tracks[position - artists.size - albums.size - SECTION_COUNT]
+      ResultType.Track.ordinal -> tracks.elementAt(position - artists.size - albums.size - SECTION_COUNT)
 
-      else -> tracks[position]
+      else -> tracks.elementAt(position)
     }
 
     Picasso.get()
@@ -173,10 +170,11 @@ class SearchAdapter(private val context: Context?, private val listener: OnSearc
     if (resultType == ResultType.Track.ordinal) {
       (item as? Track)?.let { track ->
         context?.let { context ->
-          /* if (track == currentTrack || track.current) {
+          holder.itemView.background = context.getDrawable(R.drawable.ripple)
-            holder.title.setTypeface(holder.title.typeface, Typeface.BOLD)
+
-            holder.artist.setTypeface(holder.artist.typeface, Typeface.BOLD)
+          if (track.current) {
-          } */
+            holder.itemView.background = context.getDrawable(R.drawable.current)
+          }
 
           when (track.favorite) {
             true -> holder.favorite.setColorFilter(context.getColor(R.color.colorFavorite))
@@ -250,19 +248,19 @@ class SearchAdapter(private val context: Context?, private val listener: OnSearc
         ResultType.Artist.ordinal -> {
           val position = layoutPosition - 1
 
-          listener?.onArtistClick(view, artists[position])
+          listener?.onArtistClick(view, artists.elementAt(position))
         }
 
         ResultType.Album.ordinal -> {
           val position = layoutPosition - artists.size - 2
 
-          listener?.onAlbumClick(view, albums[position])
+          listener?.onAlbumClick(view, albums.elementAt(position))
         }
 
         ResultType.Track.ordinal -> {
           val position = layoutPosition - artists.size - albums.size - SECTION_COUNT
 
-          tracks.subList(position, tracks.size).plus(tracks.subList(0, position)).apply {
+          tracks.toList().subList(position, tracks.size).plus(tracks.toList().subList(0, position)).apply {
             CommandBus.send(Command.ReplaceQueue(this))
 
             context.toast("All tracks were added to your queue")

app/src/main/java/com/github/apognu/otter/fragments/AlbumsFragment.kt

@@ -32,7 +32,7 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class AlbumsFragment : LiveOtterFragment<FunkwhaleAlbum, Album, AlbumsAdapter>() {
+class AlbumsFragment : OtterFragment<FunkwhaleAlbum, Album, AlbumsAdapter>() {
   override val repository by inject<AlbumsRepository> { parametersOf(null) }
   override val adapter by inject<AlbumsAdapter> { parametersOf(context, OnAlbumClickListener()) }
   override val viewModel by viewModel<AlbumsViewModel> { parametersOf(artistId) }

app/src/main/java/com/github/apognu/otter/fragments/AlbumsGridFragment.kt

@@ -19,7 +19,7 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class AlbumsGridFragment : LiveOtterFragment<FunkwhaleAlbum, Album, AlbumsGridAdapter>() {
+class AlbumsGridFragment : OtterFragment<FunkwhaleAlbum, Album, AlbumsGridAdapter>() {
   override val repository by inject<AlbumsRepository> { parametersOf(null) }
   override val adapter by inject<AlbumsGridAdapter> { parametersOf(context, OnAlbumClickListener()) }
   override val viewModel by viewModel<AlbumsViewModel> { parametersOf(null) }
@@ -30,6 +30,8 @@ class AlbumsGridFragment : LiveOtterFragment<FunkwhaleAlbum, Album, AlbumsGridAd
   override val layoutManager get() = GridLayoutManager(context, 3)
   override val alwaysRefresh = false
 
+  override val OFFSCREEN_PAGES = 5
+
   inner class OnAlbumClickListener : AlbumsGridAdapter.OnAlbumClickListener {
     override fun onClick(view: View?, album: Album) {
       (context as? MainActivity)?.let { activity ->

app/src/main/java/com/github/apognu/otter/fragments/ArtistsFragment.kt

@@ -28,12 +28,12 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class ArtistsFragment : LiveOtterFragment<FunkwhaleArtist, Artist, ArtistsAdapter>() {
+class ArtistsFragment : PagedOtterFragment<FunkwhaleArtist, Artist, ArtistsAdapter>() {
   override val repository by inject<ArtistsRepository>()
   override val adapter by inject<ArtistsAdapter> { parametersOf(context, OnArtistClickListener()) }
   override val viewModel by viewModel<ArtistsViewModel>()
 
-  override val liveData by lazy { viewModel.artists }
+  override val liveData by lazy { viewModel.artistsPaged }
   override val viewRes = R.layout.fragment_artists
   override val recycler: RecyclerView get() = artists
 
@@ -77,21 +77,6 @@ class ArtistsFragment : LiveOtterFragment<FunkwhaleArtist, Artist, ArtistsAdapte
     return inflater.inflate(R.layout.fragment_artists, container, false)
   }
 
-  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-    super.onViewCreated(view, savedInstanceState)
-
-    artists.layoutManager = LinearLayoutManager(context)
-    (artists.itemAnimator as? SimpleItemAnimator)?.supportsChangeAnimations = false
-    artists.adapter = adapter
-
-    liveData.observe(viewLifecycleOwner) { result ->
-      adapter.data.size.let { position ->
-        adapter.data = result.toMutableList()
-        adapter.notifyItemInserted(position)
-      }
-    }
-  }
-
   inner class OnArtistClickListener : ArtistsAdapter.OnArtistClickListener {
     override fun onClick(holder: View?, artist: Artist) {
       openAlbums(context, artist, this@ArtistsFragment, artist.album_cover)

app/src/main/java/com/github/apognu/otter/fragments/FavoritesFragment.kt

@@ -23,7 +23,7 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class FavoritesFragment : LiveOtterFragment<FunkwhaleTrack, Track, FavoritesAdapter>() {
+class FavoritesFragment : OtterFragment<FunkwhaleTrack, Track, FavoritesAdapter>() {
   override val repository by inject<FavoritesRepository>()
   override val adapter by inject<FavoritesAdapter> { parametersOf(context, FavoriteListener()) }
   override val viewModel by viewModel<FavoritesViewModel>()

app/src/main/java/com/github/apognu/otter/fragments/OtterFragment.kt

@@ -9,6 +9,8 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.observe
+import androidx.paging.PagingData
+import androidx.paging.PagingDataAdapter
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.SimpleItemAnimator
@@ -16,14 +18,14 @@ import com.github.apognu.otter.repositories.HttpUpstream
 import com.github.apognu.otter.repositories.Repository
 import com.github.apognu.otter.utils.Event
 import com.github.apognu.otter.utils.EventBus
+import com.github.apognu.otter.utils.log
 import com.github.apognu.otter.utils.untilNetwork
 import kotlinx.android.synthetic.main.fragment_artists.*
+import kotlinx.coroutines.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collect
-import kotlinx.coroutines.launch
+import org.koin.ext.scope
-import kotlinx.coroutines.withContext
 
 abstract class OtterAdapter<D, VH : RecyclerView.ViewHolder> : RecyclerView.Adapter<VH>() {
   var data: MutableList<D> = mutableListOf()
@@ -35,10 +37,8 @@ abstract class OtterAdapter<D, VH : RecyclerView.ViewHolder> : RecyclerView.Adap
   abstract override fun getItemId(position: Int): Long
 }
 
-abstract class LiveOtterFragment<DAO : Any, D : Any, A : OtterAdapter<D, *>> : Fragment() {
+abstract class OtterFragment<DAO : Any, D : Any, A : OtterAdapter<D, *>> : Fragment() {
-  companion object {
+  open val OFFSCREEN_PAGES = 10
-    const val OFFSCREEN_PAGES = 20
-  }
 
   abstract val repository: Repository<DAO>
   abstract val adapter: A
@@ -152,3 +152,82 @@ abstract class LiveOtterFragment<DAO : Any, D : Any, A : OtterAdapter<D, *>> : F
     return false
   }
 }
+
+abstract class PagedOtterFragment<DAO : Any, D : Any, A : PagingDataAdapter<D, *>> : Fragment() {
+  open val OFFSCREEN_PAGES = 10
+
+  abstract val repository: Repository<DAO>
+  abstract val adapter: A
+  open val viewModel: ViewModel? = null
+
+  abstract val liveData: LiveData<PagingData<D>>
+  abstract val viewRes: Int
+  abstract val recycler: RecyclerView
+
+  open val layoutManager: RecyclerView.LayoutManager get() = LinearLayoutManager(context)
+  open val alwaysRefresh = true
+
+  private var moreLoading = false
+  private var listener: Job? = null
+
+  override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+    return inflater.inflate(viewRes, container, false)
+  }
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+
+    liveData.observe(viewLifecycleOwner) {
+      viewLifecycleOwner.lifecycleScope.launch(IO) {
+        adapter.submitData(it)
+      }
+    }
+
+    recycler.layoutManager = layoutManager
+    recycler.adapter = adapter
+
+    if (listener == null) {
+      listener = lifecycleScope.launch(IO) {
+        EventBus.get().collect { event ->
+          if (event is Event.ListingsChanged) {
+            withContext(Main) {
+              swiper?.isRefreshing = true
+              fetch()
+            }
+          }
+        }
+      }
+    }
+  }
+
+  open fun onDataFetched(data: List<DAO>) {}
+
+  private fun fetch(size: Int = 0) {
+    moreLoading = true
+
+    repository.fetch(size).untilNetwork(lifecycleScope, IO) { data, _, hasMore ->
+      lifecycleScope.launch(Main) {
+        onDataFetched(data)
+
+        (repository.upstream as? HttpUpstream<*>)?.let { upstream ->
+          when (upstream.behavior) {
+            HttpUpstream.Behavior.Progressive -> if (!hasMore || !moreLoading) swiper?.isRefreshing = false
+            HttpUpstream.Behavior.AtOnce -> if (!hasMore) swiper?.isRefreshing = false
+            HttpUpstream.Behavior.Single -> if (!hasMore) swiper?.isRefreshing = false
+          }
+        }
+      }
+    }
+  }
+
+  private fun needsMoreOffscreenPages(): Boolean {
+    view?.let {
+      val offset = recycler.computeVerticalScrollOffset()
+      val left = recycler.computeVerticalScrollRange() - recycler.height - offset
+
+      return left < (recycler.height * OFFSCREEN_PAGES)
+    }
+
+    return false
+  }
+}

app/src/main/java/com/github/apognu/otter/fragments/PlaylistTracksFragment.kt

@@ -25,7 +25,7 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class PlaylistTracksFragment : LiveOtterFragment<FunkwhalePlaylistTrack, Track, PlaylistTracksAdapter>() {
+class PlaylistTracksFragment : OtterFragment<FunkwhalePlaylistTrack, Track, PlaylistTracksAdapter>() {
   private val favoritesRepository by inject<FavoritesRepository>()
   override val repository by inject<PlaylistTracksRepository> { parametersOf(playlistId) }
   override val adapter by inject<PlaylistTracksAdapter> { parametersOf(context, FavoriteListener()) }

app/src/main/java/com/github/apognu/otter/fragments/PlaylistsFragment.kt

@@ -19,7 +19,7 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class PlaylistsFragment : LiveOtterFragment<FunkwhalePlaylist, PlaylistEntity, PlaylistsAdapter>() {
+class PlaylistsFragment : OtterFragment<FunkwhalePlaylist, PlaylistEntity, PlaylistsAdapter>() {
   override val repository by inject<PlaylistsRepository>()
   override val adapter by inject<PlaylistsAdapter> { parametersOf(context, OnPlaylistClickListener()) }
   override val viewModel by viewModel<PlaylistsViewModel>()

app/src/main/java/com/github/apognu/otter/fragments/RadiosFragment.kt

@@ -8,7 +8,10 @@ import com.github.apognu.otter.adapters.RadiosAdapter
 import com.github.apognu.otter.models.api.FunkwhaleRadio
 import com.github.apognu.otter.models.dao.RadioEntity
 import com.github.apognu.otter.repositories.RadiosRepository
-import com.github.apognu.otter.utils.*
+import com.github.apognu.otter.utils.Command
+import com.github.apognu.otter.utils.CommandBus
+import com.github.apognu.otter.utils.Event
+import com.github.apognu.otter.utils.EventBus
 import com.github.apognu.otter.viewmodels.RadiosViewModel
 import kotlinx.android.synthetic.main.fragment_radios.*
 import kotlinx.coroutines.Dispatchers.Main
@@ -17,7 +20,7 @@ import kotlinx.coroutines.launch
 import org.koin.android.ext.android.inject
 import org.koin.core.parameter.parametersOf
 
-class RadiosFragment : LiveOtterFragment<FunkwhaleRadio, RadioEntity, RadiosAdapter>() {
+class RadiosFragment : OtterFragment<FunkwhaleRadio, RadioEntity, RadiosAdapter>() {
   override val repository by inject<RadiosRepository>()
   override val adapter by inject<RadiosAdapter> { parametersOf(context, lifecycleScope, RadioClickListener()) }
   override val viewModel by inject<RadiosViewModel>()

app/src/main/java/com/github/apognu/otter/fragments/TracksFragment.kt

@@ -3,36 +3,32 @@ package com.github.apognu.otter.fragments
 import android.os.Bundle
 import android.view.Gravity
 import android.view.View
-import androidx.appcompat.app.AppCompatDelegate
 import androidx.appcompat.widget.PopupMenu
 import androidx.core.os.bundleOf
-import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.TracksAdapter
 import com.github.apognu.otter.models.api.FunkwhaleTrack
 import com.github.apognu.otter.models.domain.Album
 import com.github.apognu.otter.models.domain.Track
-import com.github.apognu.otter.repositories.FavoritedRepository
 import com.github.apognu.otter.repositories.FavoritesRepository
 import com.github.apognu.otter.repositories.TracksRepository
-import com.github.apognu.otter.utils.*
+import com.github.apognu.otter.utils.Command
+import com.github.apognu.otter.utils.CommandBus
+import com.github.apognu.otter.utils.maybeLoad
+import com.github.apognu.otter.utils.toast
 import com.github.apognu.otter.viewmodels.TracksViewModel
-import com.google.android.exoplayer2.offline.Download
 import com.preference.PowerPreference
 import com.squareup.picasso.Picasso
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.fragment_tracks.*
-import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.flow.collect
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 
-class TracksFragment : LiveOtterFragment<FunkwhaleTrack, Track, TracksAdapter>() {
+class TracksFragment : OtterFragment<FunkwhaleTrack, Track, TracksAdapter>() {
+  private val favoritesRepository by inject<FavoritesRepository>()
+
   override val repository by inject<TracksRepository> { parametersOf(albumId) }
   override val adapter by inject<TracksAdapter> { parametersOf(context, FavoriteListener()) }
   override val viewModel by viewModel<TracksViewModel> { parametersOf(albumId) }
@@ -41,8 +37,6 @@ class TracksFragment : LiveOtterFragment<FunkwhaleTrack, Track, TracksAdapter>()
   override val viewRes = R.layout.fragment_tracks
   override val recycler: RecyclerView get() = tracks
 
-  private val favoritesRepository by inject<FavoritesRepository>()
-
   private var albumId = 0
 
   companion object {
@@ -59,8 +53,6 @@ class TracksFragment : LiveOtterFragment<FunkwhaleTrack, Track, TracksAdapter>()
     arguments?.apply {
       albumId = getInt("albumId")
     }
-
-    watchEventBus()
   }
 
   override fun onResume() {
@@ -149,42 +141,6 @@ class TracksFragment : LiveOtterFragment<FunkwhaleTrack, Track, TracksAdapter>()
     }
   }
 
-  private fun watchEventBus() {
-    lifecycleScope.launch(IO) {
-      EventBus.get().collect { message ->
-        when (message) {
-          is Event.DownloadChanged -> refreshDownloadedTrack(message.download)
-        }
-      }
-    }
-  }
-
-  private suspend fun refreshDownloadedTracks() {
-    val downloaded = TracksRepository.getDownloadedIds() ?: listOf()
-
-    withContext(Main) {
-      /* adapter.data = adapter.data.map {
-        it.downloaded = downloaded.contains(it.id)
-        it
-      }.toMutableList() */
-
-      adapter.notifyDataSetChanged()
-    }
-  }
-
-  private suspend fun refreshDownloadedTrack(download: Download) {
-    if (download.state == Download.STATE_COMPLETED) {
-      download.getMetadata()?.let { info ->
-        adapter.data.withIndex().associate { it.value to it.index }.filter { it.key.id == info.id }.toList().getOrNull(0)?.let { match ->
-          /* withContext(Main) {
-            adapter.data[match.second].downloaded = true
-            adapter.notifyItemChanged(match.second)
-          } */
-        }
-      }
-    }
-  }
-
   inner class FavoriteListener : TracksAdapter.OnFavoriteListener {
     override fun onToggleFavorite(id: Int, state: Boolean) {
       when (state) {

app/src/main/java/com/github/apognu/otter/models/Mediator.kt

@@ -0,0 +1,58 @@
+package com.github.apognu.otter.models
+
+import android.content.Context
+import androidx.paging.ExperimentalPagingApi
+import androidx.paging.LoadType
+import androidx.paging.PagingState
+import androidx.paging.RemoteMediator
+import androidx.room.withTransaction
+import com.github.apognu.otter.models.dao.DecoratedArtistEntity
+import com.github.apognu.otter.models.dao.OtterDatabase
+import com.github.apognu.otter.models.dao.toDao
+import com.github.apognu.otter.models.domain.Artist
+import com.github.apognu.otter.repositories.ArtistsRepository
+import com.github.apognu.otter.utils.AppContext
+import com.github.apognu.otter.utils.Cache
+import com.github.apognu.otter.utils.log
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.take
+import org.koin.core.KoinComponent
+
+
+@OptIn(ExperimentalPagingApi::class)
+class Mediator(private val context: Context, private val database: OtterDatabase, private val repository: ArtistsRepository) : RemoteMediator<Int, DecoratedArtistEntity>(), KoinComponent {
+  override suspend fun load(loadType: LoadType, state: PagingState<Int, DecoratedArtistEntity>): MediatorResult {
+    return try {
+      val key = when (loadType) {
+        LoadType.REFRESH -> 1
+        LoadType.PREPEND -> return MediatorResult.Success(endOfPaginationReached = true)
+
+        LoadType.APPEND -> {
+          Cache.get(context, "key")?.readLine()?.toInt() ?: return MediatorResult.Success(endOfPaginationReached = true)
+        }
+      }
+
+      key.log("fetching page")
+
+      val response = repository.fetch((key - 1) * AppContext.PAGE_SIZE).take(1).first()
+
+      database.withTransaction {
+        if (loadType == LoadType.REFRESH) {
+          Cache.delete(context, "key")
+          database.artists().deleteAll()
+        }
+
+        Cache.set(context, "key", (key + 1).toString().toByteArray())
+
+        response.data.forEach {
+          database.artists().insert(it.toDao())
+        }
+      }
+
+      return MediatorResult.Success(endOfPaginationReached = !response.hasMore)
+    } catch (e: Exception) {
+      MediatorResult.Error(e)
+    }
+  }
+}

app/src/main/java/com/github/apognu/otter/models/api/Album.kt

@@ -21,4 +21,5 @@ data class FunkwhaleAlbum(
 data class Covers(val urls: CoverUrls?)
 
 @Serializable
-data class CoverUrls(val original: String?)
+data class CoverUrls(val original: String?)
+

app/src/main/java/com/github/apognu/otter/models/dao/Album.kt

@@ -9,6 +9,7 @@ import com.github.apognu.otter.models.api.FunkwhaleArtist
 data class AlbumEntity(
   @PrimaryKey
   val id: Int,
+  @ColumnInfo(collate = ColumnInfo.UNICODE, index = true)
   val title: String,
   @ForeignKey(entity = ArtistEntity::class, parentColumns = ["id"], childColumns = ["artist_id"], onDelete = ForeignKey.CASCADE)
   val artist_id: Int,
@@ -18,13 +19,13 @@ data class AlbumEntity(
 
   @androidx.room.Dao
   interface Dao {
-    @Query("SELECT * FROM DecoratedAlbumEntity")
+    @Query("SELECT * FROM DecoratedAlbumEntity ORDER BY title")
     fun allDecorated(): LiveData<List<DecoratedAlbumEntity>>
 
-    @Query("SELECT * FROM DecoratedAlbumEntity ORDER BY release_date")
+    @Query("SELECT * FROM DecoratedAlbumEntity ORDER BY title")
     fun allSync(): List<DecoratedAlbumEntity>
 
-    @Query("SELECT * FROM DecoratedAlbumEntity WHERE id IN ( :ids ) ORDER BY release_date")
+    @Query("SELECT * FROM DecoratedAlbumEntity WHERE id IN ( :ids ) ORDER BY title")
     fun findAllDecorated(ids: List<Int>): LiveData<List<DecoratedAlbumEntity>>
 
     @Query("SELECT * FROM DecoratedAlbumEntity WHERE id == :id")
@@ -33,7 +34,7 @@ data class AlbumEntity(
     @Query("SELECT * FROM DecoratedAlbumEntity WHERE id == :id")
     fun getDecoratedBlocking(id: Int): DecoratedAlbumEntity
 
-    @Query("SELECT * FROM DecoratedAlbumEntity WHERE artist_id = :artistId")
+    @Query("SELECT * FROM DecoratedAlbumEntity WHERE artist_id = :artistId ORDER BY release_date")
     fun forArtistDecorated(artistId: Int): LiveData<List<DecoratedAlbumEntity>>
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)

app/src/main/java/com/github/apognu/otter/models/dao/Artist.kt

@@ -1,6 +1,7 @@
 package com.github.apognu.otter.models.dao
 
 import androidx.lifecycle.LiveData
+import androidx.paging.DataSource
 import androidx.room.*
 import com.github.apognu.otter.models.api.FunkwhaleArtist
 import io.realm.RealmObject
@@ -10,12 +11,15 @@ import io.realm.annotations.Required
 data class ArtistEntity(
   @PrimaryKey
   val id: Int,
-  @ColumnInfo(collate = ColumnInfo.LOCALIZED, index = true)
+  @ColumnInfo(collate = ColumnInfo.UNICODE, index = true)
   val name: String
 ) {
 
   @androidx.room.Dao
   interface Dao {
+    @Query("SELECT * FROM DecoratedArtistEntity")
+    fun allPaged(): DataSource.Factory<Int, DecoratedArtistEntity>
+
     @Query("SELECT * FROM DecoratedArtistEntity")
     fun allDecorated(): LiveData<List<DecoratedArtistEntity>>
 
@@ -25,6 +29,9 @@ data class ArtistEntity(
     @Query("SELECT * FROM DecoratedArtistEntity WHERE id == :id")
     fun getDecoratedBlocking(id: Int): DecoratedArtistEntity
 
+    @Query("SELECT * FROM DecoratedArtistEntity WHERE id IN ( :ids )")
+    fun findDecorated(ids: List<Int>): LiveData<List<DecoratedArtistEntity>>
+
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun insert(artist: ArtistEntity)
 
@@ -34,6 +41,7 @@ data class ArtistEntity(
 }
 
 fun FunkwhaleArtist.toDao() = run {
+
   ArtistEntity(id, name)
 }
 
@@ -43,7 +51,7 @@ fun FunkwhaleArtist.toDao() = run {
   INNER JOIN albums
   ON albums.artist_id = artists.id
   GROUP BY albums.artist_id
-  ORDER BY name
+  ORDER BY artists.id
 """)
 data class DecoratedArtistEntity(
   val id: Int,

app/src/main/java/com/github/apognu/otter/models/dao/Playlist.kt

@@ -8,6 +8,7 @@ import com.github.apognu.otter.models.api.FunkwhalePlaylist
 data class PlaylistEntity(
   @PrimaryKey
   val id: Int,
+  @ColumnInfo(collate = ColumnInfo.UNICODE, index = true)
   val name: String,
   val album_covers: List<String>,
   val tracks_count: Int,

app/src/main/java/com/github/apognu/otter/models/dao/Radio.kt

@@ -9,6 +9,7 @@ data class RadioEntity(
   @PrimaryKey
   val id: Int,
   var radio_type: String?,
+  @ColumnInfo(collate = ColumnInfo.UNICODE, index = true)
   val name: String,
   val description: String,
   var related_object_id: String? = null

app/src/main/java/com/github/apognu/otter/models/dao/Track.kt

@@ -3,19 +3,19 @@ package com.github.apognu.otter.models.dao
 import androidx.lifecycle.LiveData
 import androidx.room.*
 import androidx.room.ForeignKey.CASCADE
-import com.github.apognu.otter.Otter
 import com.github.apognu.otter.models.api.FunkwhaleTrack
-import org.koin.java.KoinJavaComponent.inject
 
 @Entity(tableName = "tracks")
 data class TrackEntity(
   @PrimaryKey
   val id: Int,
+  @ColumnInfo(collate = ColumnInfo.UNICODE, index = true)
   val title: String,
   @ForeignKey(entity = ArtistEntity::class, parentColumns = ["id"], childColumns = ["artist_id"], onDelete = CASCADE)
   val artist_id: Int,
   @ForeignKey(entity = AlbumEntity::class, parentColumns = ["id"], childColumns = ["album_id"], onDelete = CASCADE)
   val album_id: Int?,
+  @ColumnInfo(index = true)
   val position: Int?,
   val copyright: String?,
   val license: String?

app/src/main/java/com/github/apognu/otter/repositories/AlbumsRepository.kt

@@ -25,13 +25,15 @@ class AlbumsRepository(override val context: Context, private val database: Otte
 
   override fun onDataFetched(data: List<FunkwhaleAlbum>): List<FunkwhaleAlbum> {
     data.forEach {
-      database.albums().insert(it.toDao())
+      insert(it)
     }
 
     return super.onDataFetched(data)
   }
 
+  fun insert(album: FunkwhaleAlbum) = database.albums().insert(album.toDao())
   fun all() = database.albums().allDecorated()
+  fun find(ids: List<Int>) = database.albums().findAllDecorated(ids)
 
   fun ofArtist(id: Int): LiveData<List<DecoratedAlbumEntity>> {
     scope.launch(Dispatchers.IO) {

app/src/main/java/com/github/apognu/otter/repositories/ArtistsRepository.kt

@@ -14,7 +14,7 @@ import kotlinx.coroutines.launch
 
 class ArtistsRepository(override val context: Context, private val database: OtterDatabase) : Repository<FunkwhaleArtist>() {
   override val upstream =
-    HttpUpstream(HttpUpstream.Behavior.Progressive, "/api/v1/artists/?playable=true&ordering=name", FunkwhaleArtist.serializer())
+    HttpUpstream(HttpUpstream.Behavior.Progressive, "/api/v1/artists/?playable=true&ordering=id", FunkwhaleArtist.serializer())
 
   override fun onDataFetched(data: List<FunkwhaleArtist>): List<FunkwhaleArtist> {
     scope.launch(IO) {
@@ -34,6 +34,10 @@ class ArtistsRepository(override val context: Context, private val database: Ott
     return super.onDataFetched(data)
   }
 
+  fun insert(artist: FunkwhaleArtist) = database.artists().insert(artist.toDao())
+
+  fun allPaged() = database.artists().allPaged()
+
   fun all(): LiveData<List<DecoratedArtistEntity>> {
     scope.launch(IO) {
       fetch().collect()
@@ -41,5 +45,7 @@ class ArtistsRepository(override val context: Context, private val database: Ott
 
     return database.artists().allDecorated()
   }
+
   fun get(id: Int) = database.artists().getDecorated(id)
+  fun find(ids: List<Int>) = database.artists().findDecorated(ids)
 }

app/src/main/java/com/github/apognu/otter/repositories/HttpUpstream.kt

@@ -10,10 +10,7 @@ import com.github.kittinunf.fuel.coroutines.awaitObjectResponseResult
 import com.github.kittinunf.fuel.coroutines.awaitObjectResult
 import com.github.kittinunf.result.Result
 import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.*
-import kotlinx.coroutines.flow.channelFlow
-import kotlinx.coroutines.flow.collect
-import kotlinx.coroutines.flow.flowOn
 import kotlinx.serialization.KSerializer
 import kotlin.math.ceil
 
@@ -22,8 +19,8 @@ class HttpUpstream<D : Any>(val behavior: Behavior, private val url: String, pri
     Single, AtOnce, Progressive
   }
 
-  override fun fetch(size: Int): Flow<Repository.Response<D>> = channelFlow {
+  override fun fetch(size: Int): Flow<Repository.Response<D>> = flow {
-    if (behavior == Behavior.Single && size != 0) return@channelFlow
+    if (behavior == Behavior.Single && size != 0) return@flow
 
     val page = ceil(size / AppContext.PAGE_SIZE.toDouble()).toInt() + 1
 
@@ -41,20 +38,22 @@ class HttpUpstream<D : Any>(val behavior: Behavior, private val url: String, pri
         val data = response.results
 
         when (behavior) {
-          Behavior.Single -> send(Repository.Response(data, page, false))
+          Behavior.Single -> emit(Repository.Response(data, page, false))
-          Behavior.Progressive -> send(Repository.Response(data, page, response.next != null))
+          Behavior.Progressive -> emit(Repository.Response(data, page, response.next != null))
 
           else -> {
-            send(Repository.Response(data, page, response.next != null))
+            emit(Repository.Response(data, page, response.next != null))
 
-            if (response.next != null) fetch(size + data.size).collect { send(it) }
+            if (response.next != null) fetch(size + data.size).collect { emit(it) }
           }
         }
       },
       { error ->
+        error.log()
+
         when (error.exception) {
           is RefreshError -> EventBus.send(Event.LogOut)
-          else -> send(Repository.Response(listOf(), page, false))
+          else -> emit(Repository.Response(listOf(), page, false))
         }
       }
     )

app/src/main/java/com/github/apognu/otter/repositories/SearchRepository.kt

@@ -1,41 +1,117 @@
 package com.github.apognu.otter.repositories
 
 import android.content.Context
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.Transformations
+import androidx.lifecycle.map
 import com.github.apognu.otter.models.api.FunkwhaleAlbum
 import com.github.apognu.otter.models.api.FunkwhaleArtist
 import com.github.apognu.otter.models.api.FunkwhaleTrack
-import kotlinx.coroutines.runBlocking
+import com.github.apognu.otter.models.domain.Album
+import com.github.apognu.otter.models.domain.Artist
+import com.github.apognu.otter.models.domain.Track
+import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.launch
 
-class TracksSearchRepository(override val context: Context?, var query: String) : Repository<FunkwhaleTrack>() {
+class ArtistsSearchRepository(override val context: Context?, private val repository: ArtistsRepository, var query: String = "") : Repository<FunkwhaleArtist>() {
-  override val upstream: Upstream<FunkwhaleTrack>
+  override val upstream: Upstream<FunkwhaleArtist>
-    get() = HttpUpstream(HttpUpstream.Behavior.AtOnce, "/api/v1/tracks/?playable=true&q=$query", FunkwhaleTrack.serializer())
+    get() = HttpUpstream(HttpUpstream.Behavior.AtOnce, "/api/v1/artists/?playable=true&q=$query", FunkwhaleArtist.serializer())
 
-  override fun onDataFetched(data: List<FunkwhaleTrack>): List<FunkwhaleTrack> = runBlocking {
+  private val ids: MutableList<Int> = mutableListOf()
-    /* val downloaded = TracksRepository.getDownloadedIds() ?: listOf()
 
-    data.map { track ->
+  private val _ids: MutableLiveData<List<Int>> = MutableLiveData()
-      track.favorite = favorites.contains(track.id)
-      track.downloaded = downloaded.contains(track.id)
 
-      track.bestUpload()?.let { upload ->
+  val results: LiveData<List<Artist>> = Transformations.switchMap(_ids) {
-        val url = mustNormalizeUrl(upload.listen_url)
+    repository.find(it).map { artists -> artists.map { artist -> Artist.fromDecoratedEntity(artist) } }
+  }
 
-        track.cached = Otter.get().exoCache.isCached(url, 0, upload.duration * 1000L)
+  override fun onDataFetched(data: List<FunkwhaleArtist>): List<FunkwhaleArtist> {
-      }
+    data.forEach {
+      repository.insert(it)
+    }
 
-      track
+    ids.addAll(data.map { it.id })
-    } */
+    _ids.postValue(ids)
 
-    data
+    return super.onDataFetched(data)
+  }
+
+  fun search(term: String) {
+    ids.clear()
+    _ids.postValue(listOf())
+    query = term
+
+    scope.launch(IO) {
+      fetch().collect()
+    }
   }
 }
 
-class ArtistsSearchRepository(override val context: Context?, var query: String) : Repository<FunkwhaleArtist>() {
+class AlbumsSearchRepository(override val context: Context?, private val repository: AlbumsRepository, var query: String = "") : Repository<FunkwhaleAlbum>() {
-  override val upstream: Upstream<FunkwhaleArtist>
-    get() = HttpUpstream(HttpUpstream.Behavior.AtOnce, "/api/v1/artists/?playable=true&q=$query", FunkwhaleArtist.serializer())
-}
-
-class AlbumsSearchRepository(override val context: Context?, var query: String) : Repository<FunkwhaleAlbum>() {
   override val upstream: Upstream<FunkwhaleAlbum>
     get() = HttpUpstream(HttpUpstream.Behavior.AtOnce, "/api/v1/albums/?playable=true&q=$query", FunkwhaleAlbum.serializer())
+
+  private val ids: MutableList<Int> = mutableListOf()
+  private val _ids: MutableLiveData<List<Int>> = MutableLiveData()
+
+  val results: LiveData<List<Album>> = Transformations.switchMap(_ids) {
+    repository.find(it).map { albums -> albums.map { album -> Album.fromDecoratedEntity(album) } }
+  }
+
+  override fun onDataFetched(data: List<FunkwhaleAlbum>): List<FunkwhaleAlbum> {
+    data.forEach {
+      repository.insert(it)
+    }
+
+    ids.addAll(data.map { it.id })
+    _ids.postValue(ids)
+
+    return super.onDataFetched(data)
+  }
+
+  fun search(term: String) {
+    ids.clear()
+    _ids.postValue(listOf())
+
+    query = term
+
+    scope.launch(IO) {
+      fetch().collect()
+    }
+  }
+}
+
+class TracksSearchRepository(override val context: Context?, private val repository: TracksRepository, var query: String = "") : Repository<FunkwhaleTrack>() {
+  override val upstream: Upstream<FunkwhaleTrack>
+    get() = HttpUpstream(HttpUpstream.Behavior.AtOnce, "/api/v1/tracks/?playable=true&q=$query", FunkwhaleTrack.serializer())
+
+  private val ids: MutableList<Int> = mutableListOf()
+  private val _ids: MutableLiveData<List<Int>> = MutableLiveData()
+
+  val results: LiveData<List<Track>> = Transformations.switchMap(_ids) {
+    repository.find(it).map { tracks -> tracks.map { track -> Track.fromDecoratedEntity(track) } }
+  }
+
+  override fun onDataFetched(data: List<FunkwhaleTrack>): List<FunkwhaleTrack> {
+    data.forEach {
+      repository.insert(it)
+    }
+
+    ids.addAll(data.map { it.id })
+    _ids.postValue(ids)
+
+    return super.onDataFetched(data)
+  }
+
+  fun search(term: String) {
+    ids.clear()
+    _ids.postValue(listOf())
+    query = term
+
+    scope.launch(IO) {
+      fetch().collect()
+    }
+  }
 }

app/src/main/java/com/github/apognu/otter/repositories/TracksRepository.kt

@@ -46,6 +46,10 @@ class TracksRepository(override val context: Context, private val database: Otte
     data.sortedWith(compareBy({ it.disc_number }, { it.position }))
   }
 
+  fun insert(track: FunkwhaleTrack) {
+    database.tracks().insertWithAssocs(database.artists(), database.albums(), database.uploads(), track)
+  }
+
   fun find(ids: List<Int>) = database.tracks().findAllDecorated(ids)
 
   suspend fun ofArtistBlocking(id: Int) = database.tracks().ofArtistBlocking(id)

app/src/main/java/com/github/apognu/otter/utils/AppContext.kt

@@ -39,24 +39,6 @@ object AppContext {
 
   fun init(context: Activity) {
     setupNotificationChannels(context)
-
-    // CastContext.getSharedInstance(context)
-
-    FuelManager.instance.addResponseInterceptor { next ->
-      { request, response ->
-        if (request.method == Method.GET && response.statusCode == 200) {
-          var cacheId = request.url.path.toString()
-
-          request.url.query?.let {
-            cacheId = "$cacheId?$it"
-          }
-
-          Cache.set(context, cacheId, response.body().toByteArray())
-        }
-
-        next(request, response)
-      }
-    }
   }
 
   @SuppressLint("NewApi")

app/src/main/java/com/github/apognu/otter/viewmodels/ArtistsViewModel.kt

@@ -1,12 +1,29 @@
 package com.github.apognu.otter.viewmodels
 
-import androidx.lifecycle.LiveData
+import androidx.lifecycle.*
-import androidx.lifecycle.ViewModel
+import androidx.paging.Pager
-import androidx.lifecycle.map
+import androidx.paging.PagingConfig
+import androidx.paging.cachedIn
+import androidx.paging.map
+import com.github.apognu.otter.models.Mediator
 import com.github.apognu.otter.models.domain.Artist
 import com.github.apognu.otter.repositories.ArtistsRepository
+import com.github.apognu.otter.utils.AppContext
+import kotlinx.coroutines.flow.map
+
+class ArtistsViewModel(repository: ArtistsRepository, mediator: Mediator) : ViewModel() {
+  private val pager = Pager(
+    config = PagingConfig(pageSize = AppContext.PAGE_SIZE, initialLoadSize = AppContext.PAGE_SIZE * 5, prefetchDistance = 10 * AppContext.PAGE_SIZE, maxSize = 25 * AppContext.PAGE_SIZE, enablePlaceholders = false),
+    pagingSourceFactory = repository.allPaged().asPagingSourceFactory(),
+    remoteMediator = mediator
+  )
+
+  val artistsPaged = pager
+    .flow
+    .map { artists -> artists.map { Artist.fromDecoratedEntity(it) } }
+    .cachedIn(viewModelScope)
+    .asLiveData()
 
-class ArtistsViewModel(private val repository: ArtistsRepository) : ViewModel() {
   val artists: LiveData<List<Artist>> = repository.all().map { artists ->
     artists.map { Artist.fromDecoratedEntity(it) }
   }

app/src/main/java/com/github/apognu/otter/viewmodels/SearchViewModel.kt

@@ -0,0 +1,18 @@
+package com.github.apognu.otter.viewmodels
+
+import androidx.lifecycle.ViewModel
+import com.github.apognu.otter.repositories.AlbumsSearchRepository
+import com.github.apognu.otter.repositories.ArtistsSearchRepository
+import com.github.apognu.otter.repositories.TracksSearchRepository
+
+class SearchViewModel(private val artistsRepository: ArtistsSearchRepository, private val albumsRepository: AlbumsSearchRepository, private val tracksRepository: TracksSearchRepository) : ViewModel() {
+  val artists = artistsRepository.results
+  val albums = albumsRepository.results
+  val tracks = tracksRepository.results
+
+  fun search(term: String) {
+    artistsRepository.search(term)
+    albumsRepository.search(term)
+    tracksRepository.search(term)
+  }
+}