Do not return unused fields in DetailedSong

app/src/main/kotlin/it/vfsfitvnm/vimusic/models/DetailedSong.kt

@@ -1,11 +1,16 @@
 package it.vfsfitvnm.vimusic.models
 
-import androidx.room.Embedded
 import androidx.room.Junction
 import androidx.room.Relation
 
 open class DetailedSong(
-    @Embedded val song: Song,
+    val id: String,
+    val title: String,
+    val artistsText: String? = null,
+    val durationText: String,
+    val thumbnailUrl: String?,
+    val likedAt: Long? = null,
+    val totalPlayTimeMs: Long = 0,
     @Relation(
         entity = SongAlbumMap::class,
         entityColumn = "songId",
@@ -24,4 +29,17 @@ open class DetailedSong(
         )
     )
     val artists: List<Artist>?
-)
+) {
+    val formattedTotalPlayTime: String
+        get() {
+            val seconds = totalPlayTimeMs / 1000
+
+            val hours = seconds / 3600
+
+            return when {
+                hours == 0L -> "${seconds / 60}m"
+                hours < 24L -> "${hours}h"
+                else -> "${hours / 24}d"
+            }
+        }
+}