1 files changed, 19 insertions, 0 deletions
diff --git a/cli/js/resources.ts b/cli/js/resources.ts
new file mode 100644
index 000000000..27598ce09
--- /dev/null
+++ b/cli/js/resources.ts
@@ -0,0 +1,19 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import * as dispatch from "./dispatch.ts";
+import { sendSync } from "./dispatch_json.ts";
+
+export interface ResourceMap {
+  [rid: number]: string;
+}
+
+/** Returns a map of open _file like_ resource ids along with their string
+ * representation.
+ */
+export function resources(): ResourceMap {
+  const res = sendSync(dispatch.OP_RESOURCES) as Array<[number, string]>;
+  const resources: ResourceMap = {};
+  for (const resourceTuple of res) {
+    resources[resourceTuple[0]] = resourceTuple[1];
+  }
+  return resources;
+}