exception_type

A Dart package providing standardized failure messages and error handling classes for authentication, database operations, API failures, and more.

Features

• Predefined error messages for various failure scenarios.
• Structured failure handling using custom failure classes.
• Easy mapping of failures to user-friendly messages.

Installation

Add the following to your pubspec.yaml:

dependencies:
  exception_type: latest_version

Then run:

dart pub get

Usage

Importing the package

import 'package:exception_type/exception_type.dart';

Handling Authentication Failures

import 'package:exception_type/failures/auth_failure.dart';
import 'package:exception_type/constants/auth_failure_messages.dart';

String handleAuthError(AuthFailureType failureType) {
  switch (failureType) {
    case AuthFailureType.unauthorised:
      return AuthFailureMessages.unauthorised;
    case AuthFailureType.networkRequestFailed:
      return AuthFailureMessages.networkRequestFailed;
    default:
      return AuthFailureMessages.unknown;
  }
}

Handling Database Failures

import 'package:exception_type/failures/db_failure.dart';
import 'package:exception_type/constants/db_failure_messages.dart';

String handleDbError(DbFailureType failureType) {
  switch (failureType) {
    case DbFailureType.permissionDenied:
      return DbFailureMessages.permissionDenied;
    case DbFailureType.dataNotFound:
      return DbFailureMessages.dataNotFound;
    default:
      return DbFailureMessages.somethingWrong;
  }
}

Mapping Failures to Messages

import 'package:exception_type/exception_type.dart';

String mapFailureToMessage(IFailure failure) {
  switch (failure.runtimeType) {
    case AuthFailure:
      return handleAuthError((failure as AuthFailure).failureType);
    case DbFailure:
      return handleDbError((failure as DbFailure).failureType);
    default:
      return "An unexpected error occurred.";
  }
}

Contributing

Contributions are welcome! Please open an issue or submit a pull request on GitHub.

License

This project is licensed under the MIT License - see the LICENSE file for details.

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