JavaScript (v3): Add Scenario parser and move scenario files to their…

… own folder.

javascriptv3/example_code/libs/scenario/index.js

@@ -0,0 +1,2 @@
+export * from "./scenario.js";
+export * from "./scenario-parser.js";

javascriptv3/example_code/libs/scenario-example.js → javascriptv3/example_code/libs/scenario/scenario-example.js

@@ -8,7 +8,7 @@ import {
   ScenarioAction,
   ScenarioInput,
   ScenarioOutput,
-} from "@aws-sdk-examples/libs/scenario.js";
+} from "./index.js";
 
 const greet = new ScenarioOutput(
   "greet",

javascriptv3/example_code/libs/scenario/scenario-parser.js

@@ -0,0 +1,50 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { parseArgs } from "node:util";
+
+/**
+ * @param {Record<string, import('./scenario.js').Scenario>} scenarios
+ */
+export function parseScenarioArgs(scenarios) {
+  const help = `Usage:
+node . -s <${Object.keys(scenarios).join("|")}>
+node . -h
+
+Options:
+[-s|--scenario, <scenario>] [-h|--help]
+
+-s, --scenario    The name of a scenario to run.
+`;
+
+  const { values } = parseArgs({
+    options: {
+      help: {
+        type: "boolean",
+        short: "h",
+      },
+      scenario: {
+        short: "s",
+        type: "string",
+      },
+    },
+  });
+
+  if (values.help) {
+    console.log(help);
+    return;
+  }
+
+  if (!values.scenario) {
+    console.log(`Missing required argument: -s, --scenario\n\n${help}`);
+    return;
+  }
+
+  if (!(values.scenario in scenarios)) {
+    throw new Error(`Invalid scenario: ${values.scenario}\n${help}`);
+  }
+
+  scenarios[values.scenario].run();
+}

javascriptv3/example_code/libs/scenario.js → javascriptv3/example_code/libs/scenario/scenario.js

@@ -3,11 +3,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { Prompter } from "./prompter.js";
-import { Logger } from "./logger.js";
-import { SlowLogger } from "./slow-logger.js";
+import { Prompter } from "../prompter.js";
+import { Logger } from "../logger.js";
+import { SlowLogger } from "../slow-logger.js";
 
-class Step {
+export class Step {
   /**
    * @param {string} name
    */
@@ -21,6 +21,13 @@ class Step {
   get key() {
     return this.name;
   }
+
+  /**
+   * @param {Record<string, any>} context
+   */
+  handle(context) {
+    console.log(JSON.stringify(context));
+  }
 }
 
 export class ScenarioOutput extends Step {