test again

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

services/uploadProgress.service.js

@@ -0,0 +1,52 @@
+/***********************************************************************************************************************************************************************
+ * File Name: uploadProgress.service.js
+ * Type of Program: Service
+ * Description: In-memory SSE broadcaster for real upload progress on the
+ *              Express -> S3 (Garage) leg of an asset upload. Keyed by a
+ *              client-generated uploadId so the browser can open the stream
+ *              before the upload request itself is even sent.
+ *
+ *              No Redis — single-process only, same tradeoff already made by
+ *              mediaToken.service.js's in-memory token cache. Fine for one
+ *              instance; a second app instance would just never see progress
+ *              for uploads routed to the other process.
+ *
+ * Author: Kenneth Obsequio (@lash0000)
+ ***********************************************************************************************************************************************************************/
+"use strict";
+
+const clients = new Map(); // uploadId -> Response
+
+function subscribe(uploadId, res) {
+  res.writeHead(200, {
+    "Content-Type": "text/event-stream",
+    "Cache-Control": "no-cache, no-transform",
+    Connection: "keep-alive",
+    "X-Accel-Buffering": "no", // disable proxy-side buffering (nginx-style intermediaries)
+  });
+  res.write(": connected\n\n");
+  clients.set(uploadId, res);
+
+  res.on("close", () => {
+    if (clients.get(uploadId) === res) clients.delete(uploadId);
+  });
+}
+
+// No-ops if nobody's subscribed (client never opened the stream, or already
+// disconnected) — progress is a best-effort visual, never load-bearing for
+// the actual upload.
+function publish(uploadId, data) {
+  const res = clients.get(uploadId);
+  if (!res) return;
+  res.write(`data: ${JSON.stringify(data)}\n\n`);
+}
+
+function complete(uploadId, data = {}) {
+  const res = clients.get(uploadId);
+  if (!res) return;
+  res.write(`data: ${JSON.stringify({ ...data, done: true })}\n\n`);
+  res.end();
+  clients.delete(uploadId);
+}
+
+module.exports = { subscribe, publish, complete };