runable

lib/core/errors/failures.dart

@@ -0,0 +1,79 @@
+import 'package:equatable/equatable.dart';
+
+/// Base class for all failures in the application
+/// Failures represent errors that can be handled gracefully
+abstract class Failure extends Equatable {
+  final String message;
+
+  const Failure(this.message);
+
+  @override
+  List<Object> get props => [message];
+}
+
+/// Failure that occurs when there's a server-related error
+/// This includes HTTP errors, API errors, etc.
+class ServerFailure extends Failure {
+  const ServerFailure(super.message);
+
+  @override
+  String toString() => 'ServerFailure: $message';
+}
+
+/// Failure that occurs when there's a network-related error
+/// This includes connection timeouts, no internet, etc.
+class NetworkFailure extends Failure {
+  const NetworkFailure(super.message);
+
+  @override
+  String toString() => 'NetworkFailure: $message';
+}
+
+/// Failure that occurs when there's a local storage error
+/// This includes cache errors, database errors, etc.
+class CacheFailure extends Failure {
+  const CacheFailure(super.message);
+
+  @override
+  String toString() => 'CacheFailure: $message';
+}
+
+/// Failure that occurs when input validation fails
+class ValidationFailure extends Failure {
+  const ValidationFailure(super.message);
+
+  @override
+  String toString() => 'ValidationFailure: $message';
+}
+
+/// Failure that occurs when a required permission is denied
+class PermissionFailure extends Failure {
+  const PermissionFailure(super.message);
+
+  @override
+  String toString() => 'PermissionFailure: $message';
+}
+
+/// Failure that occurs when scanning operation fails
+class ScannerFailure extends Failure {
+  const ScannerFailure(super.message);
+
+  @override
+  String toString() => 'ScannerFailure: $message';
+}
+
+/// Failure that occurs when printing operation fails
+class PrintFailure extends Failure {
+  const PrintFailure(super.message);
+
+  @override
+  String toString() => 'PrintFailure: $message';
+}
+
+/// Generic failure for unexpected errors
+class UnknownFailure extends Failure {
+  const UnknownFailure([super.message = 'An unexpected error occurred']);
+
+  @override
+  String toString() => 'UnknownFailure: $message';
+}