stupid deno irc bot

elfamosocoucou.ts

import {Client} from "https://deno.land/x/irc@v0.5.0/mod.ts";
import { readAll } from "https://deno.land/std@0.106.0/io/mod.ts";
import { cheerio } from "https://deno.land/x/cheerio@1.0.4/mod.ts";

const nick = 'ElFamosoCoucouuu';
const client = new Client({
  nick,
  channels: ['##arch-fr-free'],
});

client.on('raw', msg => {
  const t = new Date();
  console.log(`got: ${msg.command} from ${msg.prefix} params ${msg.params} at: ${t}`);
});

client.on('connected', _msg => {
  console.log('connected!');
});

client.on('join', msg => {
  if (msg.origin.nick === nick) {
    return;
  }
  const responses = ['bienviendue NICK', "chut c'est NICK", '\\o/ NICK'];
  const resp = responses[Math.floor(Math.random() * responses.length)];
  client.privmsg(msg.channel, resp.replace('NICK', msg.origin.nick));
});

client.on('privmsg:channel', msg => {
  if (msg.origin.nick === 'barul' && Math.random() > 0.8) {
    client.privmsg(msg.channel, 'salut chef');
  } else if (msg.text.indexOf(nick + ':') === 0) {
    client.privmsg(msg.channel, "ouiiiii?");
  }
});

/// Find URIs in string
function findURIs(s: string): string[] {
  const urls = /https?:\/\/[^ $]*/.exec(s);
  if (urls) {
    return urls;
  } else {
    return [];
  }
}

/// Preview for a URL
interface UrlPreview {
  url: string,
  title?: string,
}

client.on('privmsg:channel', async (msg) => {
  const urls = findURIs(msg.text);
  // download results in parallel
  const res: Promise<UrlPreview>[] = urls.map(async (url) => {
    try {
      const req = await fetch(url);
      if (req.ok) {
        const text = await req.text();
        // extract title
        const dom = cheerio.load(text);
        const title = dom('h1').text().split('\n')[0]; // first line only
        return {url, title};
      } else {
        return {url};
      }
    } catch(e) {
      console.log(`error when fetching ${url}: ${Deno.inspect(e)}`);
      return {url}
    }
  });
  for await (const r of res) {
    if (r.title) {
      console.log(`for ${r.url}: title is ${r.title}`);
      client.privmsg(msg.channel, r.title);
    } else {
      console.log(`no title found for ${r.url}`);
    }
  }
});

client.on('privmsg:channel', async (msg) => {
  if (msg.text === '>uptime') {
    try {
      const p = Deno.run({cmd: ["uptime"], stdout: "piped"});
      const out = await readAll(p.stdout);
      const dec = new TextDecoder();
      const outStr = dec.decode(out);
      client.privmsg(msg.channel, outStr);
    } catch(e) {
      console.log(`error in uptime: ${Deno.inspect(e)}`);
    }
  }
});

await client.connect("irc.libera.chat", 7000, true);