feat: implement dart_wot CLI

bin/dart_wot.dart

@@ -0,0 +1,62 @@
+// Copyright 2024 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+import "dart:convert";
+import "dart:io";
+
+import "package:args/args.dart";
+import "package:dart_wot/binding_coap.dart";
+import "package:dart_wot/binding_http.dart";
+import "package:dart_wot/binding_mqtt.dart";
+import "package:dart_wot/core.dart";
+
+const success = 0;
+
+Future<void> main(List<String> args) async {
+  exitCode = success;
+
+  final servient = Servient.create(
+    clientFactories: [
+      CoapClientFactory(),
+      HttpClientFactory(),
+      MqttClientFactory(),
+    ],
+  );
+
+  final wot = await servient.start();
+
+  final argParser = ArgParser()
+    ..addCommand("read-property")
+    ..addCommand("request-td");
+
+  final argResults = argParser.parse(args);
+
+  final command = argResults.command;
+
+  switch (command?.name) {
+    case "read-property":
+      final uri = Uri.parse(command?.arguments.first ?? "");
+      final thingDescription = await wot.requestThingDescription(uri);
+
+      final consumedThing = await wot.consume(thingDescription);
+      final propertyKey = command?.arguments.elementAtOrNull(1) ?? "";
+
+      final interactionOutput = await consumedThing.readProperty(propertyKey);
+      final value = await interactionOutput.value();
+
+      stdout.write(value);
+    case "request-td":
+      final uri = Uri.parse(command?.arguments.first ?? "");
+      final thingDescription = await wot.requestThingDescription(uri);
+      writeThingDescription(thingDescription);
+  }
+}
+
+void writeThingDescription(ThingDescription thingDescription) {
+  // TODO: Also support other serialization formats (especially CBOR)
+  final thingDescriptionJson = jsonEncode(thingDescription.toJson());
+  stdout.write(thingDescriptionJson);
+}

pubspec.yaml

@@ -15,6 +15,7 @@ dev_dependencies:
   test: ^1.24.3
 
 dependencies:
+  args: ^2.5.0
   cbor: ^6.1.0
   coap: ^9.0.0
   collection: ^1.17.2
@@ -30,3 +31,6 @@ dependencies:
   typed_data: ^1.3.2
   uri: ^1.0.0
   uuid: ^4.2.1
+
+executables:
+  dart_wot: