chore: Add basic example (#26)

* add basic example

* update readme's

Author: codekeyz

examples/basic_example/README.md

@@ -0,0 +1,13 @@
+# basic_example
+
+This example showcases how to use the runtime with basic js functions.
+
+## Install the runtime
+
+- `dart pub global activate globe_cli`
+
+- `globe runtime install`
+
+## Run the code
+
+- `dart run lib/basic_example.dart`

examples/basic_example/lib/basic_example.dart

@@ -0,0 +1,49 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:globe_runtime/globe_runtime.dart';
+import 'package:path/path.dart' as path;
+
+const moduleName = 'BasicExample';
+
+Future<List<int>> callJsFunction(
+  String functionName, {
+  List<FFIConvertible> args = const [],
+}) async {
+  final completer = Completer<List<int>>();
+  GlobeRuntime.instance.callFunction(
+    moduleName,
+    function: functionName,
+    args: args,
+    onData: (data) {
+      if (data.hasError()) {
+        completer.completeError(data.error);
+      } else {
+        completer.complete(data.data);
+      }
+      return true;
+    },
+  );
+  return completer.future;
+}
+
+void main() async {
+  final runtime = GlobeRuntime.instance;
+  final jsCodePath =
+      path.join(Directory.current.path, 'lib', 'basic_example.js');
+
+  await runtime.registerModule(
+    moduleName,
+    jsCodePath,
+    args: ['100'.toFFIType],
+  );
+
+  final result = await callJsFunction(
+    'fetch_url',
+    args: ['https://jsonplaceholder.typicode.com/todos/1'.toFFIType],
+  ).then((data) => JsonPayload(data: data).unpack());
+  stdout.writeln(JsonEncoder.withIndent('  ').convert(result));
+
+  exit(0);
+}

examples/basic_example/lib/basic_example.js

@@ -0,0 +1,26 @@
+const sdk = {
+  init: function (apiKey) {
+    return { apiKey };
+  },
+  functions: {
+    fetch_url: async function (_, url, DartCallbackId) {
+      try {
+        const response = await fetch(url);
+
+        const data = await response.json();
+
+        const encoded = JsonPayload.encode(data);
+        if (!encoded) {
+          Dart.send_error(DartCallbackId, "Failed to encode response");
+          return;
+        }
+
+        Dart.send_value(DartCallbackId, encoded);
+      } catch (err) {
+        Dart.send_error(DartCallbackId, `Fetch failed: ${err.message}`);
+      }
+    },
+  },
+};
+
+export default sdk;