61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
import { $Present, $Says, asPresent, asSays, fromPresent, fromSays, Present, Says } from "./gen/chat-protocol.js";
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import { fromObserve, Observe } from "./gen/dataspace.js";
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import { Assertion, Handle, 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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let username = '';
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let usernameHandle: Handle | undefined;
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function updateUsername(t: Turn, u: string) {
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username = u;
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usernameHandle = t.replace(ds, usernameHandle, fromPresent(Present(username)));
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}
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updateUsername(t, 'user' + process.pid);
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const usermap = new Map<Handle, Present>();
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t.assert(ds, fromObserve(Observe({
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label: $Present,
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observer: t.ref({
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assert(t: Turn, e0: Assertion, h: Handle): void {
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const e = asPresent(e0);
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console.log(`${e.username} arrived`);
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usermap.set(h, e);
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},
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retract(t: Turn, h: Handle): void {
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const e = usermap.get(h);
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if (e) {
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usermap.delete(h);
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console.log(`${e.username} departed`);
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}
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},
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}),
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})));
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t.assert(ds, fromObserve(Observe({
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label: $Says,
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observer: t.ref({
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message(t: Turn, u0: Assertion): void {
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const u = asSays(u0);
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console.log(`${u.who}: ${u.what}`);
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},
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}),
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})));
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function sendUtterance(what: string) {
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t.freshen(t => t.message(ds, fromSays(Says({ who: username, what }))));
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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) => {
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if (line.startsWith('/nick ')) {
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t.freshen(t => updateUsername(t, line.slice(5).trimLeft()));
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} else {
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sendUtterance(line);
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}
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});
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rl.on('close', () => t.freshen(t => t.quit()));
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}
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