Migrate database (1)

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

@@ -0,0 +1,13 @@
+package it.vfsfitvnm.vimusic.models
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class Album(
+    @PrimaryKey val id: String,
+    val title: String,
+    val thumbnailUrl: String?,
+    val year: String?,
+    val authorsText: String?
+)

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

@@ -0,0 +1,12 @@
+package it.vfsfitvnm.vimusic.models
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class Artist(
+    @PrimaryKey val id: String,
+    val name: String,
+    val thumbnailUrl: String?,
+    val info: String?
+)

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

@@ -0,0 +1,26 @@
+package it.vfsfitvnm.vimusic.models
+
+import androidx.room.Embedded
+import androidx.room.Junction
+import androidx.room.Relation
+
+
+data class DetailedSong(
+    @Embedded val song: Song,
+    @Relation(
+        entity = Album::class,
+        parentColumn = "albumId",
+        entityColumn = "id"
+    ) val album: Album?,
+    @Relation(
+        entity = Artist::class,
+        parentColumn = "id",
+        entityColumn = "id",
+        associateBy = Junction(
+            value = SongArtistMap::class,
+            parentColumn = "songId",
+            entityColumn = "artistId"
+        )
+    )
+    val artists: List<Artist>?
+)

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

@@ -7,7 +7,8 @@ import androidx.room.*
 data class Song(
     @PrimaryKey val id: String,
     val title: String,
-    val albumInfoId: Long?,
+    val albumId: String?,
+    val artistsText: String? = null,
     val durationText: String,
     val thumbnailUrl: String?,
     val lyrics: String? = null,

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

@@ -0,0 +1,28 @@
+package it.vfsfitvnm.vimusic.models
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+
+
+@Entity(
+    primaryKeys = ["songId", "artistId"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Song::class,
+            parentColumns = ["id"],
+            childColumns = ["songId"],
+            onDelete = ForeignKey.CASCADE
+        ),
+        ForeignKey(
+            entity = Artist::class,
+            parentColumns = ["id"],
+            childColumns = ["artistId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ]
+)
+data class SongArtistMap(
+    @ColumnInfo(index = true) val songId: String,
+    @ColumnInfo(index = true) val artistId: String
+)

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

@@ -8,7 +8,7 @@ open class SongWithInfo(
     @Embedded val song: Song,
     @Relation(
         entity = Info::class,
-        parentColumn = "albumInfoId",
+        parentColumn = "albumId",
         entityColumn = "id"
     ) val album: Info?,
     @Relation(