feature/IO-3701-Harness-Replacement - Implement

server/feature-flags/socket-events.js

@@ -0,0 +1,40 @@
+const FEATURE_FLAGS_CHANGED_EVENT = "feature-flags-changed";
+
+/**
+ * Creates the Socket.IO payload used to tell browsers that feature flags changed.
+ */
+const createFeatureFlagsChangedPayload = ({ bodyshopId = null, source = "unknown", table = null, name = null } = {}) => ({
+  bodyshopId,
+  changedAt: new Date().toISOString(),
+  name,
+  scope: bodyshopId ? "bodyshop" : "global",
+  source,
+  table
+});
+
+/**
+ * Emits a feature-flag change event globally or to one bodyshop room.
+ */
+const emitFeatureFlagsChanged = ({ req, bodyshopId = null, source = "unknown", table = null, name = null } = {}) => {
+  const io = req?.ioRedis;
+  if (!io) return null;
+
+  const payload = createFeatureFlagsChangedPayload({ bodyshopId, source, table, name });
+
+  if (bodyshopId) {
+    const room = req?.ioHelpers?.getBodyshopRoom
+      ? req.ioHelpers.getBodyshopRoom(bodyshopId)
+      : `bodyshop-broadcast-room:${bodyshopId}`;
+    io.to(room).emit(FEATURE_FLAGS_CHANGED_EVENT, payload);
+    return payload;
+  }
+
+  io.emit(FEATURE_FLAGS_CHANGED_EVENT, payload);
+  return payload;
+};
+
+module.exports = {
+  FEATURE_FLAGS_CHANGED_EVENT,
+  createFeatureFlagsChangedPayload,
+  emitFeatureFlagsChanged
+};