refactor: move to node v20

.github/workflows/dev.workflow.yml

@@ -34,7 +34,7 @@ jobs:
         working-directory: orchestrator
     strategy:
       matrix:
-        node-version: ["21.0.0"]
+        node-version: ["20.11.0"]
     steps:
       - name: checkout
         uses: actions/checkout@v4

orchestrator/.nvmrc

@@ -1 +1 @@
-21.0.0
+v20.11.0

orchestrator/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:21.0.0-bullseye-slim
+FROM node:20.11.0-bullseye-slim
 
 WORKDIR /usr
 

orchestrator/packages/db/src/server-operations/get-jobs.ts

@@ -25,13 +25,28 @@ const getAllGradingJobs = (): Promise<Array<GradingJob>> => prismaInstance.$tran
       createdAt: 'desc'
     }
   });
-  const submitterIDToJobs: Map<number, Array<Job>> = Map.groupBy(submitterJobs, (j: Job) => j.submitterID!);
+  const submitterIDToJobs: Map<number, Array<Job>> = groupBySubmitterID(submitterJobs);
   return reservations.map((r) =>
     r.submitterID === null ?
       combineJobAndReservation(r, r.job!) :
       combineJobAndReservation(r, submitterIDToJobs.get(r.submitterID)!.shift()!));
 });
 
+const groupBySubmitterID = (submitterJobs: Array<Job>) => {
+  const submitterIDToJobs: Map<number, Array<Job>> = new Map();
+  submitterJobs.forEach((j) => {
+    if (j.submitterID === null) {
+      throw TypeError("Cannot group by a null submitter ID.");
+    }
+    if (!submitterIDToJobs.has(j.submitterID!)) {
+      submitterIDToJobs.set(j.submitterID, [j]);
+    } else {
+      submitterIDToJobs.set(j.submitterID, [...submitterIDToJobs.get(j.submitterID)!, j]);
+    }
+  });
+  return submitterIDToJobs;
+}
+
 const combineJobAndReservation = (r: Reservation, j: Job): GradingJob => ({
   ...j.config as object as GradingJobConfig,
   release_at: r.releaseAt,