Phase 1: lock cron, reload chaud, argon2, providers, IMDb lookup, cache LRU, /health, /metrics, rate limit, UI dark, biome

lib/searchEngine.js

@@ -2,18 +2,23 @@
 // queries across them. Workers are kept alive between requests so the chunks
 // stay loaded in memory (replaces the per-request `php searchmultithreads.php`
 // fork from the PHP version).
+//
+// A filesystem watcher detects when the cron rewrites the chunks and recycles
+// the worker pool transparently — no server restart needed.
 
-import { Worker } from 'node:worker_threads';
-import { join } from 'node:path';
+import { existsSync, watch } from 'node:fs';
+import { dirname, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
-import { dirname } from 'node:path';
-import { existsSync } from 'node:fs';
-import { TMDBINTEGRAL_DIR, NB_WORKERS } from '../config.js';
+import { Worker } from 'node:worker_threads';
+import { NB_WORKERS, TMDBINTEGRAL_DIR } from '../config.js';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 const WORKER_PATH = join(__dirname, 'searchWorker.js');
 
 const pools = new Map();
+let watcher = null;
+let reloadTimer = null;
+const RELOAD_DEBOUNCE_MS = 5000;
 
 class WorkerPool {
   constructor(type) {
@@ -55,10 +60,45 @@ class WorkerPool {
       }
     });
   }
+
+  async terminate() {
+    await Promise.allSettled(this.workers.map((w) => w.terminate()));
+    this.workers = [];
+  }
+}
+
+async function reloadAllPools() {
+  const types = [...pools.keys()];
+  console.log(`Reloading search pools: ${types.join(', ')}`);
+  for (const type of types) {
+    const old = pools.get(type);
+    pools.set(type, new WorkerPool(type));
+    old.terminate().catch(() => {
+      /* ignore */
+    });
+  }
+}
+
+function ensureWatcher() {
+  if (watcher) return;
+  try {
+    watcher = watch(TMDBINTEGRAL_DIR, (_event, filename) => {
+      if (!filename) return;
+      if (!/^search(movie|tv)\d+\.json$/.test(filename)) return;
+      clearTimeout(reloadTimer);
+      reloadTimer = setTimeout(reloadAllPools, RELOAD_DEBOUNCE_MS);
+    });
+    watcher.unref();
+  } catch (err) {
+    console.warn(`Cannot watch ${TMDBINTEGRAL_DIR} for chunk reload:`, err.message);
+  }
 }
 
 export function getPool(type) {
-  if (!pools.has(type)) pools.set(type, new WorkerPool(type));
+  if (!pools.has(type)) {
+    pools.set(type, new WorkerPool(type));
+    ensureWatcher();
+  }
   return pools.get(type);
 }