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import config from "$config";
import { db, g } from "$lib/db";
import { l, warn } from "$lib/logging";
import { getUser } from "$lib/utils";
import { Relay } from "nostr-tools/relay";
import webpush from "web-push";
if (config.vapid) {
webpush.setVapidDetails(`mailto:${config.support}`, config.vapid.pk, config.vapid.sk);
}
// ---------------------------------------------------------------------------
// Push notification delivery
// ---------------------------------------------------------------------------
const sendPush = async (pubkey: string, url = "/messages", event?: any) => {
try {
const user = await getUser(pubkey);
if (!user?.id) return;
const subscriptions = await db.sMembers(`${user.id}:subscriptions`);
if (!subscriptions?.length) return;
l(`push to ${user.username} (${subscriptions.length} subs)`);
const payloadObj: any = {
title: "New message",
body: "You have a new encrypted message",
url,
};
// Include the raw event for push-as-data-transport (size guard for ~4KB push limit)
if (event) {
const eventStr = JSON.stringify(event);
if (eventStr.length < 3000) payloadObj.event = eventStr;
}
const payload = JSON.stringify(payloadObj);
for (const s of subscriptions as any) {
webpush
.sendNotification(JSON.parse(s as string), payload)
.catch((e) => {
warn("push failed", e.message);
db.sRem(`${user.id}:subscriptions`, s);
});
}
} catch {
// User not found — not a coinos user
}
};
// ---------------------------------------------------------------------------
// Kind 1059 (gift wrap / invite) — notifies recipient via p tag
// ---------------------------------------------------------------------------
const handleInviteEvent = async (event: any) => {
const pTag = event.tags.find((t: any) => t[0] === "p");
if (!pTag) return;
await sendPush(pTag[1]);
};
// ---------------------------------------------------------------------------
// Kind 445 (MLS group message) — notifies all group members except sender
// ---------------------------------------------------------------------------
// In-memory group registry: nostrGroupId → { members, relays }
interface GroupEntry {
members: string[];
relays: string[];
}
const groupRegistry = new Map<string, GroupEntry>();
// Track active relay subscriptions for kind 445
const activeGroupRelays = new Set<string>();
const groupRelaySubs: (() => void)[] = [];
const handleGroupMessage = async (event: any) => {
const hTag = event.tags.find((t: any) => t[0] === "h");
if (!hTag) return;
const nostrGroupId = hTag[1];
const group = groupRegistry.get(nostrGroupId);
if (!group) return;
const sender = event.pubkey;
for (const member of group.members) {
if (member !== sender) sendPush(member, "/messages", event);
}
};
const subscribeGroupRelay = (url: string) => {
if (activeGroupRelays.has(url)) return;
activeGroupRelays.add(url);
Relay.connect(url)
.then((relay) => {
const sub = relay.subscribe(
[{ kinds: [445], since: Math.floor(Date.now() / 1000) }],
{ onevent: handleGroupMessage },
);
groupRelaySubs.push(() => sub.close());
l(`listening for group messages on ${url}`);
})
.catch((e) => {
warn(`group listener failed ${url}`, e.message);
activeGroupRelays.delete(url);
setTimeout(() => subscribeGroupRelay(url), 5000);
});
};
/** Called when a client syncs its groups. Updates registry and subscribes to new relays. */
export const syncGroups = async (groups: { nostrGroupId: string; members: string[]; relays: string[] }[]) => {
for (const g of groups) {
groupRegistry.set(g.nostrGroupId, { members: g.members, relays: g.relays });
for (const url of g.relays) subscribeGroupRelay(url);
}
l(`group registry: ${groupRegistry.size} groups, ${activeGroupRelays.size} relays`);
};
// ---------------------------------------------------------------------------
// Kind 1059 relay subscriptions (invites / NIP-17 DMs)
// ---------------------------------------------------------------------------
const subscribeInviteRelay = (url: string) => {
Relay.connect(url)
.then((relay) => {
relay.subscribe([{ kinds: [1059], since: Math.floor(Date.now() / 1000) }], {
onevent: handleInviteEvent,
});
l(`listening for invites on ${url}`);
})
.catch((e) => {
warn(`invite listener failed ${url}`, e.message);
setTimeout(() => subscribeInviteRelay(url), 5000);
});
};
// ---------------------------------------------------------------------------
// Boot: restore group registry from Redis, start listeners
// ---------------------------------------------------------------------------
const REGISTRY_KEY = "mls:groupRegistry";
const saveRegistry = async () => {
const obj: Record<string, GroupEntry> = {};
for (const [id, entry] of groupRegistry) obj[id] = entry;
await db.set(REGISTRY_KEY, JSON.stringify(obj));
};
const loadRegistry = async () => {
try {
const raw = await db.get(REGISTRY_KEY);
if (!raw) return;
const obj = JSON.parse(raw as string);
for (const [id, entry] of Object.entries(obj) as [string, GroupEntry][]) {
groupRegistry.set(id, entry);
for (const url of entry.relays) subscribeGroupRelay(url);
}
l(`restored ${groupRegistry.size} groups from registry`);
} catch {}
};
/** Called from syncGroups to persist after updates */
export const syncGroupsAndSave = async (groups: { nostrGroupId: string; members: string[]; relays: string[] }[]) => {
await syncGroups(groups);
await saveRegistry();
};
export const listenForDMs = () => {
// Subscribe to kind 1059 on configured relays
const relays = new Set([config.nostr, ...config.relays.filter((r: string) => r.startsWith("wss://"))]);
for (const url of relays) subscribeInviteRelay(url);
// Restore persisted group registry and subscribe to kind 445
loadRegistry();
};
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