Retry outbound reactions for up to a day

ts/jobs/helpers/InMemoryQueues.ts

@@ -0,0 +1,23 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import PQueue from 'p-queue';
+
+export class InMemoryQueues {
+  private readonly queues = new Map<string, PQueue>();
+
+  get(key: string): PQueue {
+    const existingQueue = this.queues.get(key);
+    if (existingQueue) {
+      return existingQueue;
+    }
+
+    const newQueue = new PQueue({ concurrency: 1 });
+    newQueue.once('idle', () => {
+      this.queues.delete(key);
+    });
+
+    this.queues.set(key, newQueue);
+    return newQueue;
+  }
+}