Count views and evict server copies by retention criteria before LRU

server/server.js

@@ -601,10 +601,23 @@ app.get('/api/streams/warm', async (c) => {
   return c.body(null, 204);
 });
 
+// One view per client per video per 30 min (a play and its save count once).
+const viewSeen = new Map(); // `${who}|${id}` -> ms
+function countView(c, videoId) {
+  const who = (c.req.header('x-forwarded-for') || '').split(',')[0].trim() || c.req.query('fp') || 'local';
+  const key = who + '|' + videoId;
+  const now = Date.now();
+  if (now - (viewSeen.get(key) || 0) < 30 * 60_000) return;
+  viewSeen.set(key, now);
+  if (viewSeen.size > 20000) viewSeen.clear();
+  p2pDb.addView(videoId, now).catch(() => {});
+}
+
 // GET /api/streams?v=<videoId> — meta + proxied audio/quality URLs.
 app.get('/api/streams', async (c) => {
   const videoId = (c.req.query('v') || '').replace(/[/\\:?<>|*"]/g, '').trim();
   if (!videoId) return c.json({ ok: false, error: 'missing videoId' }, 400);
+  countView(c, videoId);
 
   // An upload from the server's own library — no yt-dlp, no media cache.
   if (isUpload(videoId)) {
@@ -1055,7 +1068,13 @@ mkdirSync(MEDIA_DIR, { recursive: true });
 
 const media = createMediaCache({
   dir: MEDIA_DIR,
-  db: { getMedia, upsertMedia, deleteMedia, listMedia, listMediaLru, touchMedia, mediaStats },
+  db: {
+    getMedia, upsertMedia, deleteMedia, listMedia, listMediaLru, touchMedia, mediaStats,
+    // Retention (docs/p2p-architecture.md flow 9): cold copies go before popular ones.
+    listMediaEvictionOrder: () => p2pDb.listMediaEvictionOrder({
+      now: Date.now(), keepMinViews: P2P.keepMinViews, keepDays: P2P.keepDays, keepRecentDays: P2P.keepRecentDays,
+    }),
+  },
   getInfo: async (videoId) => (await resolveStreams(videoId)).info,
   download: async (videoId, out) => {
     await withSaveSlot(() => runYtdlpResilient([
@@ -1393,6 +1412,7 @@ function cachedDownloadResponse(videoId, fp, row) {
 app.get('/api/download/:videoId', async (c) => {
   const videoId = (c.req.param('videoId') || '').replace(/[/\\:?<>|*"]/g, '').trim();
   if (!videoId) return c.json({ ok: false, error: 'missing videoId' }, 400);
+  countView(c, videoId);
 
   // Uploads are already a single file on disk — hand it over as-is.
   if (isUpload(videoId)) {