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import config from "$config";
import { Relay, RelayPool } from "nostr";
import { broadcast, emit } from "$lib/sockets";
import store from "$lib/store";
import { g, s, db } from "$lib/db";
import { nada, wait } from "$lib/utils";
export let coinos;
export let pool;
export let fillPool = () => {
pool = RelayPool(config.relays);
pool.on("open", relay => {
if (relay.url.includes(config.nostr)) coinos = relay;
relay.subscribe("live", { limit: 1 });
});
pool.on("event", async (relay, sub, ev) => {
if (!coinos) return;
if (timeouts[sub]) timeouts[sub].extend(ev);
try {
let content;
try {
content = JSON.parse(ev.content);
} catch (e) {
content = ev.content;
}
if (sub === "live") {
let { pubkey } = ev;
if (Math.abs(Math.floor(Date.now() / 1000) - ev.created_at) > 7200)
return;
if (seen.includes(ev.id)) return;
seen.push(ev.id);
seen.length > 1000 && seen.shift();
if (coinos && ev.kind < 5) {
// coinos.send(["EVENT", ev]);
ev.user = await getUser(pubkey);
// broadcast("event", ev);
if (ev.kind === 4) {
let uid = await g(`user:${ev.tags[0][1]}`);
if (uid) ev.recipient = await g(`user:${uid}`);
ev.author = ev.user;
emit(uid, "event", ev);
}
}
} else if (sub.includes("profile")) {
let { pubkey } = ev;
let user = await getUser(pubkey);
if (user.updated > ev.created_at) return;
if (content.name && user.username === pubkey.substr(0, 6))
user.username = content.name;
delete content.name;
user = {
...user,
...content,
updated: ev.created_at
};
await s(`user:${pubkey}`, JSON.stringify(user));
coinos.send(ev);
} else if (sub.includes("messages")) {
let pubkey = sub.split(":")[0];
await db.sAdd(`${pubkey}:messages`, ev.id);
await s(`ev:${ev.id}`, ev);
} else if (sub.includes("follows")) {
let pubkey = sub.split(":")[0];
await s(`${pubkey}:follows`, ev.tags);
for (let f of ev.tags) {
let [_, followPubkey] = f;
await db.sAdd(`${followPubkey}:followers`, pubkey);
}
coinos.send(ev);
} else if (sub.includes("followers")) {
let followed = sub.split(":")[0];
let { pubkey } = ev;
await db.sAdd(`${followed}:followers`, pubkey);
coinos.send(ev);
} else if (sub.includes("notes")) {
let pubkey = sub.split(":")[0];
await db.sAdd(pubkey, ev.id);
await s(`ev:${ev.id}`, ev);
}
} catch (e) {
console.log(e);
}
});
};
let now = () => Math.round(Date.now() / 1000);
let timeouts = {};
export let q = async (
sub,
query,
{ timeout = 20000, since = 3600, eager = 200 }
) =>
new Promise(async (r, j) => {
let start = Date.now();
let seen = [];
let rejected;
// query.since = await g(`since:${sub}`);
// if (now() - query.since < since) return r();
let done = { [sub]: [] };
let check = s => {
let elapsed = Date.now() - start;
if (rejected) return true;
if (
done[s] &&
(done[s].length === pool.relays.length ||
(done[s].length && elapsed > eager))
) {
r();
if (timeouts[s]) timeouts[s].clear();
return true;
}
};
timeouts[sub] = {
async clear() {
clearTimeout(this.timer);
delete timeouts[sub];
pool.unsubscribe(sub);
await s(`since:${sub}`, now());
},
extend(ev) {
if (ev) {
if (seen.includes(ev.id)) return;
seen.push(ev.id);
seen.length > 1000 && seen.shift();
}
clearTimeout(this.timer);
this.timer = setTimeout(() => {
j(new Error(`query timed out: ${sub} ${Date.now()}`));
pool.unsubscribe(sub);
rejected = true;
}, timeout);
},
timer: undefined
};
timeouts[sub].extend();
pool.subscribe(sub, query);
pool.on("eose", (relay, s) => {
if (done[s]) done[s].push(relay.url);
check(s);
});
try {
await wait(() => check(sub), 100, 200);
} catch (e) {
console.log(e);
}
});
let seen = [];
let getUser = async pubkey => {
let id = await g(`user:${pubkey}`);
let user = await g(`user:${id}`);
return (
user || {
username: pubkey.substr(0, 6),
pubkey,
anon: true
}
);
};
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