wt1.0 bug fixing, push notification

lib/service/api.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'package:aitrainer_app/util/common.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:http/http.dart' as http;
 import 'package:aitrainer_app/model/auth.dart';
@@ -39,16 +40,18 @@ class APIClient extends ChangeNotifier {
       );
       authToken = responseJson['token'];
     }
+
     final response = await http.post(url,
         headers: {
-          'Content-Type': 'application/json',
+          'Content-Type': 'application/json; charset=UTF-8',
           'Authorization' : "Bearer " + authToken
         },
-        body: body
+        body: body,
     );
-    print(" ------------ response: " + response.body.toString());
+    String decodedResponse = Common.utf8convert(response.body);
+    print(" ------------ response: " + decodedResponse);
     notifyListeners();
-    return response.body;
+    return decodedResponse;
   }
 
   static dynamic authenticateUser(String email, String password) async {

lib/service/customer_service.dart

@@ -37,8 +37,13 @@ class CustomerApi {
     final String responseBody = await _client.post(
         "registration",
         body);
-    Customer customer = Customer.fromJson(jsonDecode(responseBody));
-    Auth().afterRegistration(customer);
+    Customer customer;
+    try {
+      customer = Customer.fromJson(jsonDecode(responseBody));
+      Auth().afterRegistration(customer);
+    } on FormatException catch(exception) {
+      throw new Exception(responseBody);
+    }
 
   }
 
@@ -48,10 +53,16 @@ class CustomerApi {
     final String responseBody = await _client.post(
         "login",
         body);
-    Customer customer = Customer.fromJson(jsonDecode(responseBody));
-    Auth().afterRegistration(customer);
+    Customer customer;
+    try {
+      customer = Customer.fromJson(jsonDecode(responseBody));
+      Auth().afterRegistration(customer);
+    } on FormatException catch(exception) {
+      throw new Exception(responseBody);
+    }
   }
 
+
   Future<void> getCustomer(int customerId) async {
     String body = "";
     print(" ===== get the customer by id: " + customerId.toString() );