update reordering

lib/utils/database_helper.dart

@@ -70,9 +70,38 @@ class DatabaseHelper{
     Database db = await instance.database;
     var dest = await db.delete('destination', where: "location_id = ${location_id}");
     int ret = dest > 0 ? dest : -1;
+
+    //after deleting set correct order
+    await setOrder();
+    
     return ret;
   }
 
+  Future<void>setOrder() async {
+    Database db = await instance.database;
+    var byOrder = await db.query('destination', orderBy: 'list_order');
+
+    List<Destination> des_db = byOrder.isNotEmpty
+    ? byOrder.map((e) => Destination.fromMap(e)).toList() : [];
+
+    int order = 1;
+    for( Destination d in des_db){
+
+      Map<String, dynamic> row_target = {
+          "list_order": order
+      };
+
+      await db.update(
+        "destination", 
+        row_target,
+        where: 'location_id = ?',
+        whereArgs: [d.location_id]
+      );
+
+      order += 1;
+    }
+  }
+
   Future<void> deleteAllDestinations() async {
     Database db = await instance.database;
     await db.delete('destination');
@@ -117,6 +146,10 @@ class DatabaseHelper{
     Database db = await instance.database;
     var target = await db.query('destination', where: "list_order = ${d.list_order! + dir}");
     var dest = await db.query('destination', where: "location_id = ${d.location_id}");
+
+    print("--- target in db is ${target}");
+    print("--- destine in db is ${dest}");
+
     if(target.isNotEmpty){
 
       List<Destination> target_indb = target.isNotEmpty
@@ -130,9 +163,12 @@ class DatabaseHelper{
       };
 
       Map<String, dynamic> row_des = {
-        "list_order": dest_indb[0].list_order
+        "list_order": dest_indb[0].list_order! + dir
       };
 
+      // print("--- target destination is ${target_indb[0].location_id}");
+      // print("--- destine destination is is ${dest_indb[0].location_id}");
+
       await db.update(
         "destination", 
         row_target,