1 files changed, 27 insertions, 0 deletions
diff --git a/src/dm-inbox.js b/src/dm-inbox.js
index b9eec3a..58fc72d 100644
--- a/src/dm-inbox.js
+++ b/src/dm-inbox.js
@@ -15,6 +15,8 @@
 // notification instead of a filtered one.
 
 import { unwrapDM } from './dm.js';
+import { openCall, CALL, RING_S } from './calls.js';
+import * as nip44 from 'nostr-tools/nip44';
 
 const DB = 'coinos-dm-inbox';
 const STORE = 'inbox';
@@ -115,3 +117,28 @@ export function shouldNotifyDm(verdict) {
   if (verdict.followed || verdict.known) return true;
   return !verdict.hasList;
 }
+
+// A call ringing in (NIP-AC), the wrap a push pointed at: opened with the key
+// it's for, and worth ringing only as a fresh offer from someone this
+// account follows or talks to, and hasn't muted. Returns { offer, name,
+// type } to ring with, or null for anything else (a candidate, a stranger,
+// a stale one, a wrap we hold no key for); `quiet` for a caller who
+// may not ring us (not followed, not written to).
+export async function classifyCall(wrap, inboxes, nowS = Math.floor(Date.now() / 1000)) {
+  for (const rec of inboxes) {
+    if (!rec || !rec.sk) continue;
+    let sk;
+    try { sk = unhex(rec.sk); } catch { continue; }
+    const ev = await openCall(wrap, async (pk, ct) => nip44.decrypt(ct, nip44.getConversationKey(sk, pk)));
+    if (!ev) continue;
+    const from = ev.pubkey;
+    if (ev.kind !== CALL.OFFER || from === rec.pubkey || nowS - ev.created_at > RING_S) return null;
+    if ((rec.muted || []).includes(from)) return null;
+    const type = (ev.tags.find((x) => x[0] === 'call-type') || [])[1] === 'video' ? 'video' : 'voice';
+    // someone not followed nor written to doesn't ring — `quiet`: the app
+    // lists it as a call that didn't ring, next time it opens
+    const quiet = !(rec.follows || []).includes(from) && !(rec.rings || rec.known || []).includes(from);
+    return { offer: ev, name: (rec.names || {})[from] || null, type, quiet };
+  }
+  return null;
+}