Rename files

ts/util/toWebStream.node.ts

@@ -0,0 +1,46 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { type Readable, finished } from 'node:stream';
+import { once } from 'node:events';
+
+// Note: can be removed once https://github.com/nodejs/node/issues/54205 is
+// resolved and ported to Electron.
+export function toWebStream(readable: Readable): ReadableStream<Buffer> {
+  let controller: ReadableStreamDefaultController<Buffer>;
+
+  const cleanup = finished(readable, err => {
+    cleanup();
+
+    if (err != null) {
+      return controller.error(err);
+    }
+
+    controller.close();
+  });
+
+  return new ReadableStream({
+    start(newController) {
+      controller = newController;
+    },
+    async pull() {
+      try {
+        await once(readable, 'readable');
+        const chunk = readable.read();
+        if (chunk != null) {
+          controller.enqueue(chunk);
+        }
+      } catch (error) {
+        cleanup();
+        controller.error(error);
+      }
+    },
+    cancel(reason) {
+      // If we got canceled - don't call controller.close/.error since it will
+      // throw.
+      cleanup();
+
+      readable.destroy(reason ? new Error(reason) : undefined);
+    },
+  });
+}