add discount api

lib/data/provider/common_data_provider.dart

@@ -1,3 +1,4 @@
+import 'package:fcs/domain/entities/discount.dart';
 import 'package:fcs/domain/entities/payment_method.dart';
 import 'package:fcs/domain/vo/message.dart';
 import 'package:fcs/helpers/api_helper.dart';
@@ -32,4 +33,19 @@ class CommonDataProvider {
         payload: {"owner_id": ownerID, "seen_by_owner": seenByOwner},
         token: await getToken());
   }
+
+  Future<void> createDiscount(Discount discount) async {
+    return await requestAPI("/discounts", "POST",
+        payload: discount.toMap(), token: await getToken());
+  }
+
+  Future<void> updateDiscount(Discount discount) async {
+    return await requestAPI("/discounts", "PUT",
+        payload: discount.toMap(), token: await getToken());
+  }
+
+  Future<void> deleteDiscount(String id) async {
+    return await requestAPI("/discounts", "DELETE",
+        payload: {"id": id}, token: await getToken());
+  }
 }

lib/data/services/common_imp.dart

@@ -1,5 +1,5 @@
 import 'package:fcs/data/provider/common_data_provider.dart';
-import 'package:fcs/data/provider/user_data_provider.dart';
+import 'package:fcs/domain/entities/discount.dart';
 import 'package:fcs/domain/entities/payment_method.dart';
 import 'package:fcs/domain/vo/message.dart';
 import 'package:flutter/material.dart';
@@ -37,4 +37,19 @@ class CommonServiceImp implements CommonService {
   Future<void> seenMessage(String ownerID, bool seenByOwner) {
     return commonDataProvider.seenMessage(ownerID, seenByOwner);
   }
+
+  @override
+  Future<void> createDiscount(Discount discount) {
+    return commonDataProvider.createDiscount(discount);
+  }
+
+  @override
+  Future<void> deleteDiscount(String id) {
+    return commonDataProvider.deleteDiscount(id);
+  }
+
+  @override
+  Future<void> updateDiscount(Discount discount) {
+    return commonDataProvider.updateDiscount(discount);
+  }
 }

lib/data/services/common_service.dart

@@ -1,3 +1,4 @@
+import 'package:fcs/domain/entities/discount.dart';
 import 'package:fcs/domain/entities/payment_method.dart';
 import 'package:fcs/domain/vo/message.dart';
 
@@ -10,4 +11,9 @@ abstract class CommonService {
   // Messaging
   Future<void> sendMessage(Message message);
   Future<void> seenMessage(String ownerID, bool seenByOwner);
+
+  // Payment
+  Future<void> createDiscount(Discount discount);
+  Future<void> updateDiscount(Discount discount);
+  Future<void> deleteDiscount(String id);
 }