43 lines
1.4 KiB
TypeScript
43 lines
1.4 KiB
TypeScript
import { $Present, $Says, asPresent, asSays, fromPresent, fromSays, Present, Says } from "../gen/simple-chat-protocol.js";
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import { during, observe } from "../runtime/dataspace.js";
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import { Assertion, Handle, Ref, Turn } from "../runtime/actor.js";
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import { attachReadline } from './readline.js';
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import { Embedded } from "@preserves/core";
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export default function (t: Turn, ds_ptr: Embedded<Ref>) {
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const ds = ds_ptr.embeddedValue;
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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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observe(t, ds, $Present, during(async (_t, e0) => {
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const e = asPresent(e0);
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console.log(`${e.username} arrived`);
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return (_t) => console.log(`${e.username} departed`);
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}));
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observe(t, ds, $Says, {
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message(_t: Turn, u0: Assertion): void {
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const u = asSays(u0);
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console.log(`${u.who}: ${u.what}`);
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},
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});
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attachReadline(t, {
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retract(t) { t.stopActor(); },
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message(t, line: string) {
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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(ds, fromSays(Says({ who: username, what: line })));
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}
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},
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});
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}
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