Implement custom legacy to adaptive icon transformations

database/src/main/java/de/mm20/launcher2/database/AppDatabase.kt

@@ -28,6 +28,7 @@ abstract class AppDatabase : RoomDatabase() {
     abstract fun widgetDao(): WidgetDao
     abstract fun currencyDao(): CurrencyDao
     abstract fun backupDao(): BackupRestoreDao
+    abstract fun customAttrsDao(): CustomAttrsDao
 
     companion object {
         private var _instance: AppDatabase? = null

database/src/main/java/de/mm20/launcher2/database/CustomAttrsDao.kt

@@ -0,0 +1,12 @@
+package de.mm20.launcher2.database
+
+import androidx.room.Dao
+import androidx.room.Query
+import de.mm20.launcher2.database.entities.CustomAttributeEntity
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface CustomAttrsDao {
+    @Query("SELECT * FROM CustomAttributes WHERE type = 'icon' AND key = :key LIMIT 1")
+    fun getCustomIcon(key: String) : Flow<CustomAttributeEntity?>
+}