Removed unused files, code cleanup

lib/helpers/message_helpers.dart

@@ -0,0 +1,111 @@
+import 'dart:developer';
+
+import 'package:flutter/material.dart';
+import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/core/service/github_issue_service.dart';
+import 'package:paperless_mobile/core/translation/error_code_localization_mapper.dart';
+import 'package:paperless_mobile/generated/l10n.dart';
+
+class SnackBarActionConfig {
+  final String label;
+  final VoidCallback onPressed;
+
+  SnackBarActionConfig({
+    required this.label,
+    required this.onPressed,
+  });
+}
+
+void showSnackBar(
+  BuildContext context,
+  String message, {
+  String? details,
+  SnackBarActionConfig? action,
+  Duration duration = const Duration(seconds: 5),
+}) {
+  ScaffoldMessenger.of(context)
+    ..hideCurrentSnackBar()
+    ..showSnackBar(
+      SnackBar(
+        content: (details != null)
+            ? RichText(
+                maxLines: 5,
+                text: TextSpan(
+                  text: message,
+                  style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                        color: Theme.of(context).colorScheme.onInverseSurface,
+                      ),
+                  children: <TextSpan>[
+                    TextSpan(
+                      text: "\n$details",
+                      style: const TextStyle(
+                        fontStyle: FontStyle.italic,
+                        fontSize: 10,
+                      ),
+                    ),
+                  ],
+                ),
+              )
+            : Text(message),
+        action: action != null
+            ? SnackBarAction(
+                label: action.label,
+                onPressed: action.onPressed,
+                textColor: Theme.of(context).colorScheme.onInverseSurface,
+              )
+            : null,
+        duration: duration,
+      ),
+    );
+}
+
+void showGenericError(
+  BuildContext context,
+  dynamic error, [
+  StackTrace? stackTrace,
+]) {
+  showSnackBar(
+    context,
+    error.toString(),
+    action: SnackBarActionConfig(
+      label: S.of(context).errorReportLabel,
+      onPressed: () => GithubIssueService.createIssueFromError(
+        context,
+        stackTrace: stackTrace,
+      ),
+    ),
+  );
+  log(
+    "An error has occurred.",
+    error: error,
+    stackTrace: stackTrace,
+    time: DateTime.now(),
+  );
+}
+
+void showLocalizedError(
+  BuildContext context,
+  String localizedMessage, [
+  StackTrace? stackTrace,
+]) {
+  showSnackBar(context, localizedMessage);
+  log(localizedMessage, stackTrace: stackTrace);
+}
+
+void showErrorMessage(
+  BuildContext context,
+  PaperlessServerException error, [
+  StackTrace? stackTrace,
+]) {
+  showSnackBar(
+    context,
+    translateError(context, error.code),
+    details: error.details,
+  );
+  log(
+    "An error has occurred.",
+    error: error,
+    stackTrace: stackTrace,
+    time: DateTime.now(),
+  );
+}