refreshTokenTemplate top-level property

String refreshTokenTemplate

This is code to be generated.

Implementation

String refreshTokenTemplate = """
/*
 * Created by DartGenX CLI tool on ${DateFormat('EEE, dd MMM yyyy, h:mm a').format(DateTime.now())}
 */

import 'dart:async';

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

class RefreshToken {

  static final RefreshToken _instance = RefreshToken._();
  static RefreshToken get instance => _instance;

  RefreshToken._();

  Completer<dynamic>? _completer;
  bool isAccessTokenFetch = false;
  SharedPreferences? prefs;
  Dio dio = Dio(
    BaseOptions(
      baseUrl: "<YOUR-BASE-URL>",
    ),
  );

  int retryCount = 0;
  final int maxRetries = 3;  // You can change the maximum number of retries from here.

  void callRefreshToken({required DioException err, required ErrorInterceptorHandler handler}) async {
    // If already tried refreshing, stop further recursion
    if (retryCount > maxRetries) {
      debugPrint('❌ Max retries reached for token refresh.');
      handler.reject(err);
      return;
    }
    if (_completer != null) {
      if (_completer!.isCompleted && isAccessTokenFetch) {
        handler.resolve(await dio.fetch(err.requestOptions));
      } else {
        await _completer!.future.then((value) async {
          isAccessTokenFetch = true;

          // Get the shared preferences instance.
          prefs ??= await SharedPreferences.getInstance();

          // Save new tokens to shared preferences
          await prefs!.setString('accessToken', "<YOUR-NEW-ACCESS-TOKEN>");
          await prefs!.setString('refreshToken', "<YOUR-NEW-REFRESH-TOKEN>");


          // Update the access token to the header
          err.requestOptions.headers['Authorization'] = 'Bearer <YOUR-NEW-ACCESS-TOKEN>';

          // This will called the api again which has thrown the unauthorized error.
          handler.resolve(await dio.fetch(err.requestOptions));
          retryCount = 0;
        }, onError: (err) {
          retryCount++;
          callRefreshToken(err: err, handler: handler);
        });
      }
    } else {
      _completer = Completer();
      prefs ??= await SharedPreferences.getInstance();

      await dio.post("<API-ENDPOINT-FOR-GETTING-NEW-ACCESS-TOKEN-USING-REFRESH-TOKEN>", data: {"token": prefs!.getString('refreshToken') ?? ''}).then((value) {
        _completer!.complete(value);
      }, onError: (err) {
        _completer!.completeError(err);
      });
      _completer = null;
    }
  }
}
""";