cloudflare--workers-sdk/packages/vite-plugin-cloudflare/playground/external-workflows/worker-a/index.ts

interface Env {
	MY_WORKFLOW: Workflow;
}

export default {
	async fetch(request, env) {
		const url = new URL(request.url);
		const id = url.searchParams.get("id");

		if (url.pathname === "/create") {
			const instance = await env.MY_WORKFLOW.create(
				id === null ? undefined : { id }
			);

			return Response.json({
				id: instance.id,
				status: await instance.status(),
			});
		}

		if (url.pathname === "/get") {
			if (id === null) {
				return new Response(
					"Please provide an id (`/get?id=unique-instance-id`)"
				);
			}

			const instance = await env.MY_WORKFLOW.get(id);

			return Response.json(await instance.status());
		}

		return new Response(
			"Create a new Workflow instance (`/create` or `/create?id=unique-instance-id`) or inspect an existing instance (`/get?id=unique-instance-id`)."
		);
	},
} satisfies ExportedHandler<Env>;