Add Bun bundle docs and Telegram grammY support

src/telegram/webhook.ts

@@ -0,0 +1,69 @@
+import { createServer } from "node:http";
+
+import { webhookCallback } from "grammy";
+
+import type { RuntimeEnv } from "../runtime.js";
+import { defaultRuntime } from "../runtime.js";
+import { createTelegramBot } from "./bot.js";
+
+export async function startTelegramWebhook(opts: {
+  token: string;
+  path?: string;
+  port?: number;
+  host?: string;
+  secret?: string;
+  runtime?: RuntimeEnv;
+  fetch?: typeof fetch;
+  abortSignal?: AbortSignal;
+  healthPath?: string;
+  publicUrl?: string;
+}) {
+  const path = opts.path ?? "/telegram-webhook";
+  const healthPath = opts.healthPath ?? "/healthz";
+  const port = opts.port ?? 8787;
+  const host = opts.host ?? "0.0.0.0";
+  const runtime = opts.runtime ?? defaultRuntime;
+  const bot = createTelegramBot({
+    token: opts.token,
+    runtime,
+    proxyFetch: opts.fetch,
+  });
+  const handler = webhookCallback(bot, "http", {
+    secretToken: opts.secret,
+  });
+
+  const server = createServer((req, res) => {
+    if (req.url === healthPath) {
+      res.writeHead(200);
+      res.end("ok");
+      return;
+    }
+    if (req.url !== path || req.method !== "POST") {
+      res.writeHead(404);
+      res.end();
+      return;
+    }
+    handler(req, res);
+  });
+
+  const publicUrl =
+    opts.publicUrl ??
+    `http://${host === "0.0.0.0" ? "localhost" : host}:${port}${path}`;
+
+  await bot.api.setWebhook(publicUrl, {
+    secret_token: opts.secret,
+  });
+
+  await new Promise<void>((resolve) => server.listen(port, host, resolve));
+  runtime.log?.(`Telegram webhook listening on ${publicUrl}`);
+
+  const shutdown = () => {
+    server.close();
+    bot.stop();
+  };
+  if (opts.abortSignal) {
+    opts.abortSignal.addEventListener("abort", shutdown, { once: true });
+  }
+
+  return { server, bot, stop: shutdown };
+}