Add Room database for custom playlist

Here we go again!

Doing custom playlist db

app/src/main/java/code/name/monkey/retromusic/dialogs/AddToRetroPlaylist.kt

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+package code.name.monkey.retromusic.dialogs
+
+import android.app.Dialog
+import android.os.Bundle
+import androidx.core.os.bundleOf
+import androidx.fragment.app.DialogFragment
+import androidx.lifecycle.lifecycleScope
+import code.name.monkey.retromusic.R
+import code.name.monkey.retromusic.db.PlaylistDatabase
+import code.name.monkey.retromusic.db.PlaylistEntity
+import code.name.monkey.retromusic.db.SongEntity
+import code.name.monkey.retromusic.extensions.colorButtons
+import code.name.monkey.retromusic.extensions.extraNotNull
+import code.name.monkey.retromusic.extensions.materialDialog
+import code.name.monkey.retromusic.model.Song
+import code.name.monkey.retromusic.repository.RealSongRepository
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.koin.android.ext.android.get
+
+class AddToRetroPlaylist : DialogFragment() {
+    companion object {
+        fun getInstance(playlistName: List<PlaylistEntity>): AddToRetroPlaylist {
+            return AddToRetroPlaylist().apply {
+                arguments = bundleOf("playlist_names" to playlistName)
+            }
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val playlistEntities = extraNotNull<List<PlaylistEntity>>("playlist_names").value
+        val playlistNames = mutableListOf<String>()
+        playlistNames.add(requireContext().resources.getString(R.string.action_new_playlist))
+        for (p in playlistEntities) {
+            playlistNames.add(p.playlistName)
+        }
+        return materialDialog(R.string.add_playlist_title)
+            .setItems(playlistNames.toTypedArray()) { _, which ->
+                val songs = RealSongRepository(requireContext()).songs()
+                println(songs.size)
+                if (which == 0) {
+                    CreateRetroPlaylist().show(requireActivity().supportFragmentManager, "Dialog")
+                } else {
+                    lifecycleScope.launch(Dispatchers.IO) {
+                        println(Thread.currentThread().name)
+                        val database: PlaylistDatabase = get()
+                        val songEntities = songs.withPlaylistIds(playlistEntities[which - 1])
+                        database.playlistDao().insertSongs(songEntities)
+                    }
+                }
+                dismiss()
+            }
+            .create().colorButtons()
+    }
+}
+
+private fun List<Song>.withPlaylistIds(playlistEntity: PlaylistEntity): List<SongEntity> {
+    val songEntities = map {
+        SongEntity(it.id, playlistEntity.playlistName)
+    }
+    println(songEntities.size)
+    return songEntities
+}

app/src/main/java/code/name/monkey/retromusic/dialogs/CreateRetroPlaylist.kt

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+package code.name.monkey.retromusic.dialogs
+
+import android.app.Dialog
+import android.os.Bundle
+import android.text.TextUtils
+import android.view.LayoutInflater
+import androidx.fragment.app.DialogFragment
+import androidx.lifecycle.lifecycleScope
+import code.name.monkey.retromusic.R
+import code.name.monkey.retromusic.db.PlaylistDatabase
+import code.name.monkey.retromusic.db.PlaylistEntity
+import code.name.monkey.retromusic.extensions.colorButtons
+import code.name.monkey.retromusic.extensions.materialDialog
+import com.google.android.material.textfield.TextInputEditText
+import com.google.android.material.textfield.TextInputLayout
+import kotlinx.android.synthetic.main.dialog_playlist.view.*
+import kotlinx.coroutines.launch
+import org.koin.android.ext.android.get
+
+class CreateRetroPlaylist : DialogFragment() {
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val view = LayoutInflater.from(requireActivity()).inflate(R.layout.dialog_playlist, null)
+        val playlistView: TextInputEditText = view.actionNewPlaylist
+        val playlistContainer: TextInputLayout = view.actionNewPlaylistContainer
+        return materialDialog(R.string.new_playlist_title)
+            .setView(view)
+            .setPositiveButton(
+                R.string.create_action
+            ) { _, _ ->
+                val playlistName = playlistView.text.toString()
+                if (!TextUtils.isEmpty(playlistName)) {
+                    val database: PlaylistDatabase = get()
+                    lifecycleScope.launch {
+                        database.playlistDao().createPlaylist(PlaylistEntity(playlistName))
+                    }
+                } else {
+                    playlistContainer.error = "Playlist is can't be empty"
+                }
+            }
+            .create()
+            .colorButtons()
+    }
+}