import { App, AppContext } from "https://deno.land/x/grammy_app/mod.ts";
import { Composer } from "https://deno.land/x/grammy/mod.ts";

interface Session {
  count: number;
}

type Context = AppContext<Session>;
const defaultSession: Session = { count: 0 };
const app = new App(defaultSession);
const handlers = new Composer<Context>();

handlers.on("msg", (ctx) => {
  const count = ++ctx.session.count;
  return ctx.r(`${count}`);
});

app.run(handlers);