Link between front-end and back-end

lib/db/db_helper.dart

@@ -50,7 +50,7 @@ class DbHelper {
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 name TEXT NOT NULL,
                 type TEXT NOT NULL,
-                volatege REAL NOT NULL,
+                voltage REAL NOT NULL,
                 image_uuid TEXT
             )
         ''');
@@ -84,6 +84,16 @@ class DbHelper {
     return maps.map((e) => Drone.fromMap(e)).toList();
   }
 
+  Future<int> updateDrone(Drone drone) async {
+    final db = await database;
+    return await db.update(
+      "drones",
+      drone.toMap(),
+      where: "id = ?",
+      whereArgs: [drone.id],
+    );
+  }
+
   Future<int> deleteDrone(int droneId) async {
     // TODO: Delete image
     final db = await database;
@@ -103,6 +113,16 @@ class DbHelper {
     return maps.map((e) => Battery.fromMap(e)).toList();
   }
 
+  Future<int> updateBattery(Battery battery) async {
+    final db = await database;
+    return await db.update(
+      "batteries",
+      battery.toMap(),
+      where: "id = ?",
+      whereArgs: [battery.id],
+    );
+  }
+
   Future<int> deleteBattery(int batteryId) async {
     // TODO: Delete image
     final db = await database;