67 lines
2.2 KiB
TypeScript
67 lines
2.2 KiB
TypeScript
import { $joinedUser, $says, $user, asJoin, asSays, asUserInfo, fromNickClaim, fromSays, NickClaim, Says, UserId } from "./gen/secure-chat-protocol.js";
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import { during, observe } from "./dataspace.js";
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import { Assertion, Ref, Turn } from "./actor.js";
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import readline from 'readline';
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export default function (t: Turn, ds: Ref) {
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observe(t, ds, $joinedUser, {
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assert(t, j0) {
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const j = asJoin(j0);
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runSession(t, j.uid, j.handle);
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}
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});
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}
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function runSession(t: Turn, uid: UserId, session: Ref) {
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let username: string | undefined;
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function updateUsername(t: Turn, name: string) {
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const q = t.assert(session, fromNickClaim(NickClaim({ uid, name, k: t.ref({
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message(t, reply0) {
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if (reply0 === true) {
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username = name;
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console.log(`Nick changed to ${username}`);
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} else {
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console.log(`Nick conflict: name is still ${username ?? '<not set>'}`);
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}
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t.retract(q);
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}
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})})));
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}
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updateUsername(t, 'user' + process.pid);
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const users = new Map<UserId, string>();
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observe(t, session, $user, during((_t, ui0) => {
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const ui = asUserInfo(ui0);
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const oldName = users.get(ui.uid);
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console.log(oldName === void 0
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? `${ui.name} arrived`
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: `${oldName} changed name to ${ui.name}`);
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users.set(ui.uid, ui.name);
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return (_t) => {
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if (users.get(ui.uid) === ui.name) {
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console.log(`${ui.name} departed`);
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}
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};
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}));
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observe(t, session, $says, {
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message(_t: Turn, u0: Assertion): void {
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const u = asSays(u0);
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console.log(`${users.get(u.who) ?? `<unknown ${u.who}>`}: ${u.what}`);
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},
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});
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const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
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rl.on('line', (line: string) => t.freshen(t => {
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if (line.toLowerCase().startsWith('/nick ')) {
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updateUsername(t, line.slice(5).trimLeft());
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} else {
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t.message(session, fromSays(Says({ who: uid, what: line })));
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}
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}));
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rl.on('close', () => t.freshen(t => t.stopActor()));
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}
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