- migrated ids from int to long

- some cleaning

app/src/main/java/code/name/monkey/retromusic/extensions/CursorExtensions.kt

@@ -0,0 +1,37 @@
+package code.name.monkey.retromusic.extensions
+
+import android.database.Cursor
+
+// exception is rethrown manually in order to have a readable stacktrace
+
+internal fun Cursor.getInt(columnName: String): Int {
+    try {
+        return this.getInt(this.getColumnIndex(columnName))
+    } catch (ex: Throwable) {
+        throw IllegalStateException("invalid column $columnName", ex)
+    }
+}
+
+internal fun Cursor.getLong(columnName: String): Long {
+    try {
+        return this.getLong(this.getColumnIndex(columnName))
+    } catch (ex: Throwable) {
+        throw IllegalStateException("invalid column $columnName", ex)
+    }
+}
+
+internal fun Cursor.getString(columnName: String): String {
+    try {
+        return this.getString(this.getColumnIndex(columnName))
+    } catch (ex: Throwable) {
+        throw IllegalStateException("invalid column $columnName", ex)
+    }
+}
+
+internal fun Cursor.getStringOrNull(columnName: String): String? {
+    try {
+        return this.getString(this.getColumnIndex(columnName))
+    } catch (ex: Throwable) {
+        throw IllegalStateException("invalid column $columnName", ex)
+    }
+}