file actor

lib/src/file_actor.dart

@@ -0,0 +1,39 @@
+import 'dart:io';
+import 'package:actors/actors.dart';
+
+sealed class FileMessage {
+  const FileMessage();
+}
+
+final class LoadFile extends FileMessage {
+  final String path;
+  const LoadFile(this.path);
+}
+
+final class SaveFile extends FileMessage {
+  final String path;
+  final String content;
+  const SaveFile(this.path, this.content);
+}
+
+sealed class FileResult {
+  const FileResult();
+}
+
+final class FileLoaded extends FileResult {
+  final String content;
+  const FileLoaded(this.content);
+}
+
+final class FileSaved extends FileResult {
+  const FileSaved();
+}
+
+class FileActor with Handler<FileMessage, FileResult> {
+  @override
+  Future<FileResult> handle(FileMessage message) => switch (message) {
+        LoadFile(:final path) => File(path).readAsString().then(FileLoaded.new),
+        SaveFile(:final path, :final content) =>
+          File(path).writeAsString(content).then((_) => const FileSaved()),
+      };
+}