From 73746086d617e71bb878df65b5bc211149a7d404 Mon Sep 17 00:00:00 2001
From: rjawesome <rohanj2006@gmail.com>
Date: Wed, 7 Aug 2024 15:52:35 -0700
Subject: [PATCH] allow server integration tests to work with subquery relay

---
 src/controllers/threading/threadHandler.ts | 30 +++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/src/controllers/threading/threadHandler.ts b/src/controllers/threading/threadHandler.ts
index 80c399a..c725c98 100644
--- a/src/controllers/threading/threadHandler.ts
+++ b/src/controllers/threading/threadHandler.ts
@@ -239,8 +239,34 @@ export async function runTask(req: Request, res: Response, route: string, useBul
   }
 
   if (process.env.USE_THREADING === "false") {
+    // Set up "inter thread messaging"
+    const { port1: workerSide, port2: parentSide } = new MessageChannel();
+    parentSide.on("message", async (msg: ThreadMessage) => {
+      switch (msg.type) {
+        case "subqueryRequest":
+          const { queries, options } = msg.value as {
+            queries: FrozenSubquery[];
+            options: QueryHandlerOptions;
+          };
+          debug(`Main thread receives ${queries.length} subqueries from worker.`);
+          subqueryRelay.subscribe(
+            await Promise.all(queries.map(async query => await Subquery.unfreeze(query))),
+            options,
+            ({ hash, records, logs, apiUnavailable }) => {
+              parentSide.postMessage({
+                threadId: 0,
+                type: "subQueryResult",
+                value: { hash, records, logs, apiUnavailable },
+              } satisfies ThreadMessage);
+            },
+          );
+          break;
+      }
+    });
+    global.workerSide = workerSide;
     // Threading disabled, just use the provided function in main event loop
     const response = (await tasks[route](taskInfo)) as TrapiResponse;
+    parentSide.close();
     return response;
   } else if (!(queryQueue && useBullSync)) {
     // Redis unavailable or query not to sync queue such as asyncquery_status
@@ -335,10 +361,8 @@ export async function runBullJob(job: BullJob, route: string, useAsync = true) {
 export function taskResponse<T>(response: T, status: number = undefined): T {
   if (global.workerSide) {
     global.workerSide.postMessage({ threadId, type: 'result', value: response, status } satisfies ThreadMessage);
-    return undefined;
-  } else {
-    return response;
   }
+  return response;
 }
 
 export function taskError(error: Error): void {