60 lines
1.5 KiB
TypeScript
60 lines
1.5 KiB
TypeScript
import { Application, Router } from "@oak/oak";
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import { Packet } from "./proto.ts";
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import { CausalTree } from "./sync/ordt/causal-tree.ts";
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import { PlainTextORDT } from "./sync/ordt/plain-text.ts";
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const app = new Application();
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const router = new Router();
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const pt = new PlainTextORDT();
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const sockets = new Set<WebSocket>();
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// simple websocket broadcast
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router.get("/api/connect", ctx => {
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const socket = ctx.upgrade();
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sockets.add(socket);
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socket.addEventListener("message", event => {
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if (typeof event.data !== "string") return;
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const op = JSON.parse(event.data);
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pt.apply(op); // mutates op to strong
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const weakOp = CausalTree.toWeakOp(op);
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for (const other of sockets) {
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if (other === socket) continue;
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other.send(JSON.stringify({ t: "op", op: weakOp }));
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}
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});
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socket.addEventListener("close", () => {
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sockets.delete(socket);
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});
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const onReady = () => {
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socket.send(
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JSON.stringify({
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t: "init",
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ops: pt.operations.map(it => CausalTree.toWeakOp(it)),
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you: crypto.randomUUID(),
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} satisfies Packet),
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);
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};
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if (socket.readyState === WebSocket.OPEN) {
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onReady();
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} else {
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socket.addEventListener("open", () => onReady());
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}
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});
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router.get("/:path*", async ctx => {
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try {
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await ctx.send({ root: "./client", index: "index.html" });
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} catch {
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// ignore
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}
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});
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app.use(router.routes());
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app.use(router.allowedMethods());
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console.log("Listening at: http://127.0.0.1:3000/ ...");
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app.listen({ port: 3000 });
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