one_ui_flutter_app/lib/repository/base_repository.dart

import 'dart:convert';
import 'dart:io';

import 'package:dio/dio.dart';

abstract class BaseRepository {
  final Dio dio;
  BaseRepository({required this.dio});

  Future<Map<String, dynamic>> get({
    required String service,
    CancelToken? cancelToken,
  }) async {
    try {
      final response = await dio.get(
        service,
        cancelToken: cancelToken,
        options: Options(
          headers: {
            HttpHeaders.contentTypeHeader: "application/json",
          },
          contentType: "application/json",
        ),
      );
      if (response.statusCode != 200) {
        throw BaseRepositoryException(
          message: "Invalid Http Response ${response.statusCode}",
        );
      }
      final jData = jsonDecode(response.data);
      if (jData["status"] == "ERR") {
        throw BaseRepositoryException(message: jData["message"]);
      }
      return jData;
    } on DioError catch (e) {
      throw BaseRepositoryException(message: e.message);
    } on SocketException catch (e) {
      throw BaseRepositoryException(message: e.message);
    } on BaseRepositoryException catch (e) {
      throw BaseRepositoryException(message: e.message);
    }
  }

  Future<Map<String, dynamic>> post({
    required String service,
    required Map<String, dynamic> jsonParam,
    CancelToken? cancelToken,
  }) async {
    try {
      final response = await dio.post(
        service,
        data: jsonParam,
        cancelToken: cancelToken,
        options: Options(
          headers: {
            HttpHeaders.contentTypeHeader: "application/json",
          },
          contentType: "application/json",
        ),
      );
      if (response.statusCode != 200) {
        throw BaseRepositoryException(
          message:
              "Invalid Http Response ${response.statusCode} |${response.statusMessage}",
        );
      }
      final jData = jsonDecode(response.data);
      if (jData["status"] == "ERR") {
        throw BaseRepositoryException(message: jData["message"]);
      }
      return jData;
    } on DioError catch (e) {
      throw BaseRepositoryException(message: e.message);
    } on SocketException catch (e) {
      throw BaseRepositoryException(message: e.message);
    } on BaseRepositoryException catch (e) {
      throw BaseRepositoryException(message: e.message);
    }
  }
}

class BaseRepositoryException implements Exception {
  final String message;
  BaseRepositoryException({
    required this.message,
  });
}