bot.ts

import {
  Bot,
  Context,
  NextFunction,
} from "https://deno.land/x/grammy@v1.38.2/mod.ts";
import { pipeline } from "./helper.ts";

const BOT_TOKEN = Deno.env.get("BOT_TOKEN");

if (!BOT_TOKEN) throw new Error("Bot Token is not set!");

const bot = new Bot(BOT_TOKEN);

async function responseTime(ctx: Context, next: NextFunction): Promise<void> {
  console.log(ctx.inlineQuery?.query);
  const before = Date.now(); // milliseconds
  await next();
  const after = Date.now(); // milliseconds
  console.log(`Response time: ${after - before} ms`);
}

bot.use(responseTime);

bot.on("inline_query", async (ctx) => {
  const userQuery = ctx.update.inline_query.query;
  if (typeof userQuery !== "string" || userQuery.trim() === "") return;
  const limit = 50;
  const offset = ctx.update.inline_query.offset.trim()
    ? ctx.update.inline_query.offset.split(",")
    : [];
  const [start, end] = offset.length
    ? [Number(offset[0]), Number(offset[1])]
    : [0, limit];
  const results = await pipeline(userQuery);
  const { notFound, result } = results;
  return ctx.answerInlineQuery(result.slice(start, end), {
    cache_time: notFound ? 0 : 2592000, /*30_DAYS*/
    next_offset: `${end},${end + limit}`,
  });
});

export { bot };