feat: download queue

utils/atoms/queue.ts

@@ -0,0 +1,55 @@
+import { BaseItemDto } from "@jellyfin/sdk/lib/generated-client/models";
+import { atom, useAtom } from "jotai";
+import { useEffect } from "react";
+
+export interface Job {
+  id: string;
+  item: BaseItemDto;
+  execute: () => void | Promise<void>;
+}
+
+export const queueAtom = atom<Job[]>([]);
+export const isProcessingAtom = atom(false);
+
+export const queueActions = {
+  enqueue: (queue: Job[], setQueue: (update: Job[]) => void, job: Job) => {
+    const updatedQueue = [...queue, job];
+    console.info("Enqueueing job", job, updatedQueue);
+    setQueue(updatedQueue);
+  },
+  processJob: async (
+    queue: Job[],
+    setQueue: (update: Job[]) => void,
+    setProcessing: (processing: boolean) => void,
+  ) => {
+    const [job, ...rest] = queue;
+    setQueue(rest);
+
+    console.info("Processing job", job);
+
+    setProcessing(true);
+    await job.execute();
+    console.info("Job done", job);
+    setProcessing(false);
+  },
+  clear: (
+    setQueue: (update: Job[]) => void,
+    setProcessing: (processing: boolean) => void,
+  ) => {
+    setQueue([]);
+    setProcessing(false);
+  },
+};
+
+export const useJobProcessor = () => {
+  const [queue, setQueue] = useAtom(queueAtom);
+  const [isProcessing, setProcessing] = useAtom(isProcessingAtom);
+
+  useEffect(() => {
+    console.info("Queue changed", queue, isProcessing);
+    if (queue.length > 0 && !isProcessing) {
+      console.info("Processing queue", queue);
+      queueActions.processJob(queue, setQueue, setProcessing);
+    }
+  }, [queue, isProcessing, setQueue, setProcessing]);
+};