cleanup code

html/src/service/sqlite.js

@@ -1,16 +1,20 @@
 // requires binding of SQLite
 
-function execute(callback, sql, args = null) {
+class SQLiteService {
-    return new Promise(function (resolve, reject) {
+    execute(callback, sql, args = null) {
-        SQLite.Execute(callback, resolve, reject, sql, args)
+        return new Promise((resolve, reject) => {
+            SQLite.Execute(callback, resolve, reject, sql, args);
         });
     }
 
-function executeNonQuery(sql, args = null) {
+    executeNonQuery(sql, args = null) {
         return SQLite.ExecuteNonQuery(sql, args);
     }
+}
 
-export default {
+var self = new SQLiteService();
-    execute,
+
-    executeNonQuery
+export {
+    self as default,
+    SQLiteService
 };