handle error dio

lib/data/api/app_exception.dart

@@ -0,0 +1,47 @@
+import 'package:dio/dio.dart';
+import 'package:farm_tpf/utils/const_string.dart';
+
+class AppException {
+  static String handleError(dynamic error) {
+    String errorDescription = "";
+    if (error is DioError) {
+      DioError dioError = error;
+      switch (dioError.type) {
+        case DioErrorType.CANCEL:
+          errorDescription = exception_dio_cancle;
+          break;
+        case DioErrorType.CONNECT_TIMEOUT:
+          errorDescription = exception_dio_connect_timeout;
+          break;
+        case DioErrorType.DEFAULT:
+          errorDescription = exception_dio_default;
+          break;
+        case DioErrorType.RECEIVE_TIMEOUT:
+          errorDescription = exception_dio_receive_timeout;
+          break;
+        case DioErrorType.RESPONSE:
+          int statusCode = dioError.response.statusCode;
+          if (statusCode == 400) {
+            errorDescription = exception_dio_400;
+          } else if (statusCode == 401) {
+            errorDescription = exception_dio_401;
+          } else if (statusCode == 403) {
+            errorDescription = exception_dio_403;
+          } else if (statusCode == 404) {
+            errorDescription = exception_dio_404;
+          } else if (statusCode == 500) {
+            errorDescription = exception_dio_500;
+          } else {
+            errorDescription = exception_common;
+          }
+          break;
+        case DioErrorType.SEND_TIMEOUT:
+          errorDescription = exception_dio_send_timeout;
+          break;
+      }
+    } else {
+      errorDescription = exception_common;
+    }
+    return errorDescription;
+  }
+}

lib/presentation/screens/plot/sc_plot.dart

@@ -70,7 +70,7 @@ class _InfinityViewState extends State<InfinityView> {
     return BlocBuilder<InfinityScrollBloc, InfinityScrollState>(
       builder: (context, state) {
         if (state is InfinityScrollFailure) {
-          return Center(child: Text(label_error_get_data));
+          return Center(child: Text(state.errorString));
         }
         if (state is InfinityScrollSuccess) {
           if (state.items.isEmpty) {

lib/utils/bloc/infinity_scroll_bloc.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 
 import 'package:bloc/bloc.dart';
 import 'package:equatable/equatable.dart';
+import 'package:farm_tpf/data/api/app_exception.dart';
 import 'package:farm_tpf/data/repository/repository.dart';
 import 'package:meta/meta.dart';
 
@@ -44,8 +45,8 @@ class InfinityScrollBloc
                   hasReachedMax: false);
         }
       } catch (e) {
-        print(e);
-        yield InfinityScrollFailure();
+        var errorString = AppException.handleError(e);
+        yield InfinityScrollFailure(errorString: errorString);
       }
     }
     if (event is OnRefresh) {
@@ -56,8 +57,8 @@ class InfinityScrollBloc
             items: response.results,
             page: 0,
             hasReachedMax: response.results.length < pageSize ? true : false);
-      } catch (_) {
-        yield InfinityScrollFailure();
+      } catch (e) {
+        yield InfinityScrollFailure(errorString: AppException.handleError(e));
       }
     }
   }

lib/utils/bloc/infinity_scroll_state.dart

@@ -9,7 +9,10 @@ abstract class InfinityScrollState extends Equatable {
 
 class InfinityScrollInitial extends InfinityScrollState {}
 
-class InfinityScrollFailure extends InfinityScrollState {}
+class InfinityScrollFailure extends InfinityScrollState {
+  final String errorString;
+  InfinityScrollFailure({@required this.errorString});
+}
 
 class InfinityScrollSuccess<T> extends InfinityScrollState {
   final List<T> items;

lib/utils/const_string.dart

@@ -23,3 +23,19 @@ const String label_record_video = "Quay video";
 const String label_cancel = "Huỷ";
 const String label_list_empty = "Dữ liệu rỗng";
 const String label_error_get_data = "Lỗi tải dữ liệu";
+
+//Exception
+const String exception_common = "Đã có lỗi xảy ra";
+const String exception_dio_cancle = "Truy vấn đến máy chủ bị huỷ";
+const String exception_dio_connect_timeout =
+    "Quá thời gian kết nối đến máy chủ";
+const String exception_dio_default = "Kết nối đến máy chủ thất bại";
+const String exception_dio_receive_timeout =
+    "Quá thời gian nhận dữ liệu từ máy chủ";
+const String exception_dio_send_timeout =
+    "Quá thời gian gửi dữ liệu tới máy chủ";
+const String exception_dio_400 = "Định dạng dữ liệu không đúng";
+const String exception_dio_401 = "Lỗi xác thực người dùng";
+const String exception_dio_403 = "Không có quyền truy cập";
+const String exception_dio_404 = "Không tìm thấy dữ liệu";
+const String exception_dio_500 = "Lỗi máy chủ";