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// Public read-only view of the default coinos community — served at /chat.
//
// No wallet, no login, no server-side decoder: the community's join material
// (community.js) ships in this bundle — the root is deliberately public-ish,
// every coinos user is meant to be a member — so this page derives the
// stream keys and decrypts wraps right in the visitor's browser, exactly
// like the app's Chat tab does. Reading is open; POSTING still requires a
// signed seal from a real identity, which is what the sign-in button is for.
//
// Deliberately lean: plain DOM (append/rebuild, no morphing), messages +
// edits + deletes + reactions only (no presence, typing, or guestbook), and
// the moderation that matters publicly — the folded control state's ban list
// hides banned members' messages here just as it does in the app.
import { subscribeOn, queryOn, npubOf, openWrapsOffthread, PROFILE_RELAYS } from './nostr.js';
import { channelKey, controlKey, openWrap, foldControl, eventMs } from './concord.js';
import { COMMUNITY, EPOCH } from './community.js';
import { hexToBytes } from '@noble/hashes/utils';
import { timeAgo } from './format.js';
import { t } from './i18n.js';
// Same shape as the app's h() for the attributes this page uses.
function h(tag, attrs = {}, ...children) {
const e = document.createElement(tag);
for (const [k, v] of Object.entries(attrs || {})) {
if (v == null || v === false) continue;
if (k === 'class') e.className = v;
else if (k.startsWith('on') && typeof v === 'function') e[k.toLowerCase()] = v;
else e.setAttribute(k, v);
}
for (const c of children.flat()) {
if (c == null || c === false || c === true) continue;
e.append(c.nodeType ? c : document.createTextNode(String(c)));
}
return e;
}
// Message text, safely: content stays text nodes (relay content must never
// reach innerHTML); URLs become links, image URLs render inline. The app's
// richer noteBody also resolves nostr: mentions — here they stay dim stubs,
// since this page has no profile screens to open.
const LINK_SPLIT = /(https?:\/\/[^\s]+|nostr:(?:npub|nprofile|note|nevent|naddr)1[a-z0-9]+)/gi;
function linkedBody(text) {
const out = [];
for (const part of String(text || '').split(LINK_SPLIT)) {
if (!part) continue;
if (/^https?:\/\//i.test(part)) {
if (/\.(png|jpe?g|gif|webp|avif)(\?[^\s]*)?$/i.test(part)) {
out.push(h('img', { src: part, class: 'note-img', loading: 'lazy',
onError: (e) => { e.target.style.display = 'none'; } }));
} else {
out.push(h('a', { href: part, target: '_blank', rel: 'noopener noreferrer' },
part.length > 64 ? part.slice(0, 61) + '…' : part));
}
} else if (/^nostr:/i.test(part)) {
out.push(h('span', { class: 'faint' }, part.slice(6, 18) + '…'));
} else out.push(part);
}
return out;
}
export function mountPublicChat() {
const root = document.getElementById('app');
const rootBytes = hexToBytes(COMMUNITY.community_root);
const cid = COMMUNITY.community_id;
// ---- state ---------------------------------------------------------------
const byChannel = new Map(); // channelId -> Map(rumorId -> { rumor, author })
const edits = new Map(); // rumorId -> { rumor, author }
const deletes = new Map(); // rumorId -> Set(author)
const reactions = new Map(); // rumorId -> Map(author -> emoji)
const controlEntries = [];
let folded = null; // foldControl result: banned set + channel renames
let foldT = 0; // fold-once-per-burst debounce, same as the app's rooms
const profiles = new Map(); // pk -> { name, picture } | null while loading
const seen = new Set();
let activeChannel = (COMMUNITY.channels[0] || {}).id;
// ---- decrypt (worker first, sliced main-thread fallback) -----------------
function openBg(wrap, stream, cb) {
const job = openWrapsOffthread([wrap], stream.convKey);
if (!job) { cb(openWrap(wrap, stream)); return; }
job.then((r) => cb(r ? r[0] : openWrap(wrap, stream)));
}
// ---- repaint (debounced full rebuild of the log) --------------------------
let paintT = 0;
const schedule = () => { clearTimeout(paintT); paintT = setTimeout(paint, 120); };
// Profiles fetched in one batched kind-0 query per burst of new authors —
// a REQ per author tripped relay concurrency limits with a full backlog.
const pendingPks = new Set();
let profT = 0;
function profileOf(pk) {
if (profiles.has(pk)) return profiles.get(pk);
profiles.set(pk, null);
pendingPks.add(pk);
clearTimeout(profT);
profT = setTimeout(async () => {
const batch = [...pendingPks];
pendingPks.clear();
try {
const evs = await queryOn([...new Set([...PROFILE_RELAYS, ...COMMUNITY.relays])], { kinds: [0], authors: batch }, 3500);
for (const ev of evs.sort((a, b) => a.created_at - b.created_at)) { // newest overwrites
try {
const p = JSON.parse(ev.content);
profiles.set(ev.pubkey, { name: p.display_name || p.name, picture: p.picture });
} catch {}
}
for (const pk2 of batch) if (!profiles.get(pk2)) profiles.set(pk2, {});
} catch {}
schedule();
}, 300);
return null;
}
const nameOf = (pk) => {
const p = profileOf(pk);
return (p && p.name) || (npubOf(pk) || pk).slice(0, 12);
};
const avatar = (pk) => {
const p = profileOf(pk);
if (p && p.picture) return h('img', { class: 'chat-avatar', src: p.picture, alt: '' });
return h('div', { class: 'chat-avatar fallback' }, nameOf(pk).slice(0, 2));
};
function onRumor(channelId, { rumor, author }) {
const tag = (k) => rumor.tags?.find((x) => x[0] === k);
// CORD-03 §3: the rumor must commit to the channel/epoch that decrypted it
if (tag('channel')?.[1] !== channelId || tag('epoch')?.[1] !== String(EPOCH)) return;
if (rumor.kind === 9) {
const msgs = byChannel.get(channelId) || byChannel.set(channelId, new Map()).get(channelId);
msgs.set(rumor.id, { rumor, author });
} else if (rumor.kind === 5) {
for (const e of rumor.tags.filter((x) => x[0] === 'e')) {
(deletes.get(e[1]) || deletes.set(e[1], new Set()).get(e[1])).add(author);
}
} else if (rumor.kind === 3302) {
const target2 = tag('e')?.[1];
if (target2) {
const cur = edits.get(target2);
if (!cur || eventMs(rumor) > eventMs(cur.rumor)) edits.set(target2, { rumor, author });
}
} else if (rumor.kind === 7) {
const target2 = tag('e')?.[1];
if (target2) (reactions.get(target2) || reactions.set(target2, new Map()).get(target2)).set(author, rumor.content);
} else {
return;
}
schedule();
}
// ---- subscriptions ---------------------------------------------------------
const control = controlKey(rootBytes, cid, COMMUNITY.root_epoch || EPOCH);
subscribeOn(COMMUNITY.relays, { kinds: [1059], authors: [control.pk], limit: 500 }, (wrap) => {
if (seen.has(wrap.id)) return;
seen.add(wrap.id);
openBg(wrap, control, (opened) => {
if (!opened || opened.rumor.kind !== 3308) return;
controlEntries.push(opened);
clearTimeout(foldT);
foldT = setTimeout(() => {
folded = foldControl(controlEntries, { ownerHex: COMMUNITY.owner, cid });
schedule();
}, 250);
});
});
const streams = new Map(); // channelId -> derived stream key
for (const c of COMMUNITY.channels) {
const stream = channelKey(rootBytes, c.id, EPOCH);
streams.set(c.id, stream);
subscribeOn(COMMUNITY.relays, { kinds: [1059], authors: [stream.pk], limit: 200 }, (wrap) => {
if (seen.has(wrap.id)) return;
seen.add(wrap.id);
openBg(wrap, stream, (opened) => { if (opened) onRumor(c.id, opened); });
});
}
// ---- view ------------------------------------------------------------------
const channelList = () => {
// control-plane renames/additions win over the baked-in genesis list
if (folded && folded.channels && folded.channels.size) {
return [...folded.channels.entries()].map(([id, c]) => ({ id, name: c.name }));
}
return COMMUNITY.channels;
};
const hasAccount = (() => {
try {
return !!(sessionStorage.getItem('btc-wallet-accounts') || (JSON.parse(localStorage.getItem('btc-wallet-watch') || '[]')).length);
} catch { return false; }
})();
const log = h('div', { class: 'chat-log', style: 'flex:1 1 auto' });
const tabs = h('div', { class: 'row gap6', style: 'flex-wrap:wrap' });
function paint() {
// channel tabs (only when there's more than one)
tabs.replaceChildren();
const chans = channelList();
if (chans.length > 1) {
for (const c of chans) {
tabs.append(h('button', {
class: 'btn-sm' + (c.id === activeChannel ? ' btn-primary' : ''),
onClick: () => {
if (!streams.has(c.id)) {
const stream = channelKey(rootBytes, c.id, EPOCH);
streams.set(c.id, stream);
subscribeOn(COMMUNITY.relays, { kinds: [1059], authors: [stream.pk], limit: 200 }, (wrap) => {
if (seen.has(wrap.id)) return;
seen.add(wrap.id);
openBg(wrap, stream, (opened) => { if (opened) onRumor(c.id, opened); });
});
}
activeChannel = c.id;
paint();
},
}, '#' + c.name));
}
}
const stick = log.scrollHeight - log.scrollTop - log.clientHeight < 60 || !log.childElementCount;
const banned = (folded && folded.banned) || new Set();
const rows = [...(byChannel.get(activeChannel) || new Map()).values()]
.filter(({ rumor, author }) => !banned.has(author)
&& !(deletes.get(rumor.id) && deletes.get(rumor.id).has(author)))
.sort((a, b) => (eventMs(a.rumor) || 0) - (eventMs(b.rumor) || 0));
log.replaceChildren();
if (!rows.length) {
log.append(h('div', { class: 'small muted center', style: 'padding:30px 0' },
h('span', { class: 'spinner sm', style: 'margin-right:8px' }), t('publicChatLoading')));
}
let prev = null;
for (const m of rows) {
const ms = eventMs(m.rumor) || m.rumor.created_at * 1000;
const grouped = prev && prev.author === m.author
&& ms - (eventMs(prev.rumor) || 0) < 5 * 60_000;
prev = m;
const edit = edits.get(m.rumor.id);
const content = edit && edit.author === m.author ? edit.rumor.content : m.rumor.content;
const reacts = reactions.get(m.rumor.id);
// a reply e-tags its quoted message — render the context when we hold it
const replyId = (m.rumor.tags || []).find((x) => x[0] === 'e')?.[1];
const replySrc = replyId && !(deletes.get(replyId) || new Set()).size
? (byChannel.get(activeChannel) || new Map()).get(replyId) : null;
const quote = replySrc ? h('div', { class: 'chat-quote' },
h('span', { class: 'chat-quote-name' }, nameOf(replySrc.author)),
h('span', { class: 'chat-quote-text' },
String(replySrc.rumor.content || '').replace(/\s+/g, ' ').slice(0, 90))) : null;
log.append(h('div', { class: 'chat-row' + (grouped ? ' grouped' : '') },
grouped ? h('div', { class: 'chat-avatar spacer' }) : avatar(m.author),
h('div', { class: 'chat-body' },
grouped ? null : h('div', { class: 'chat-meta' },
h('span', { class: 'chat-name' + (m.author === COMMUNITY.owner ? ' owner' : '') }, nameOf(m.author)),
m.author === COMMUNITY.owner ? h('span', { class: 'chat-badge' }, t('msgAdmin')) : null,
h('span', { class: 'chat-time' }, timeAgo(ms / 1000))),
h('div', { class: 'chat-bubble' }, quote, ...linkedBody(content),
edit && edit.author === m.author ? h('span', { class: 'chat-edited' }, ' ' + t('msgEdited')) : null,
reacts && reacts.size ? h('div', { class: 'chat-reacts' },
...[...[...reacts.values()].reduce((m2, e) => m2.set(e, (m2.get(e) || 0) + 1), new Map()).entries()]
.map(([emoji, n]) => h('span', { class: 'chat-react' }, emoji + (n > 1 ? ' ' + n : '')))) : null))));
}
if (stick) log.scrollTop = log.scrollHeight;
}
// ---- shell -------------------------------------------------------------------
// #app is already the centered 560px column; .chat-card manages its own
// viewport height and .chat-log scrolls — the same shell the app's Chat
// tab uses, so this page inherits its look for free.
document.title = 'coinos chat';
root.replaceChildren(
h('div', { class: 'chat-card card' },
h('div', { class: 'chat-head' },
h('div', { class: 'row between', style: 'align-items:center;gap:10px' },
h('div', { class: 'col', style: 'gap:2px;min-width:0' },
h('div', { class: 'chat-title' }, t('publicChatTitle', { name: COMMUNITY.name })),
h('div', { class: 'small muted' }, t('publicChatDesc'))),
h('button', { class: 'btn-primary btn-sm', style: 'flex-shrink:0', onClick: () => { location.href = '/'; } },
hasAccount ? t('publicChatOpenApp') : t('publicChatSignIn'))),
tabs),
log));
paint();
}
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