Refetch missing media from catalog source

server/media-cache.test.js

@@ -2,7 +2,7 @@
 // Uses real ffmpeg fixtures and the real db.js against a throwaway DB file.
 import { describe, test, expect, beforeAll, afterAll } from 'bun:test';
 import { spawnSync } from 'node:child_process';
-import { mkdtempSync, rmSync, copyFileSync, writeFileSync, readFileSync, existsSync, readdirSync } from 'node:fs';
+import { mkdtempSync, rmSync, copyFileSync, writeFileSync, readFileSync, existsSync, readdirSync, unlinkSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 
@@ -93,6 +93,7 @@ let dirN = 0;
 function makeCache({ fixture = 'good.mp4', duration = 10, ...opts } = {}) {
   const dir = join(root, 'media' + dirN++);
   const calls = [];
+  const sources = [];
   const db = {
     getMedia: dbmod.getMedia, upsertMedia: dbmod.upsertMedia, deleteMedia: dbmod.deleteMedia,
     listMedia: dbmod.listMedia, listMediaLru: dbmod.listMediaLru, touchMedia: dbmod.touchMedia,
@@ -102,13 +103,13 @@ function makeCache({ fixture = 'good.mp4', duration = 10, ...opts } = {}) {
   const cache = createMediaCache({
     dir, db, log: silentLog,
     getInfo: async (id) => ({ id, title: 'T ' + id, channel: 'C', duration }),
-    download: async (id, out) => { calls.push(id); await sleep(30); copyFileSync(fx(state.fixture), out); return out; },
+    download: async (id, out, sourceUrl) => { calls.push(id); sources.push({ id, sourceUrl }); await sleep(30); copyFileSync(fx(state.fixture), out); return out; },
     transcode: { enabled: false },
     freeBytes: () => 100 * 1024 ** 3,
     backfillDelayMs: -1,
     ...opts,
   });
-  return { cache, dir, calls, state };
+  return { cache, dir, calls, sources, state };
 }
 async function clearDb() {
   for (const r of await dbmod.listMedia()) await dbmod.deleteMedia(r.video_id);
@@ -233,6 +234,19 @@ describe('media cache jobs', () => {
     expect(calls.length).toBe(2);
   });
 
+  test('missing cached files are re-fetched from the stored source URL', async () => {
+    await clearDb();
+    const id = 'srcAAAAAA01';
+    const sourceUrl = `https://www.youtube.com/watch?v=${id}`;
+    const { cache, dir, calls, sources } = makeCache({ getSourceUrl: async () => sourceUrl });
+    await cache.init();
+    const first = await cache.ensureCached(id, { priority: HIGH });
+    unlinkSync(join(dir, `${id}.${first.gen}.mp4`));
+    await cache.ensureCached(id, { priority: HIGH });
+    expect(calls).toHaveLength(2);
+    expect(sources.every(call => call.id === id && call.sourceUrl === sourceUrl)).toBe(true);
+  });
+
   test('auto jobs respect the auto length limit; explicit saves do not', async () => {
     await clearDb();
     const { cache } = makeCache({ duration: 7200, autoMaxSeconds: 3600 });