index.js

const fs = require('fs');
const superagent = require('superagent');

const readFilePromise = file => {
  return new Promise((resolve, reject) => {
    fs.readFile(file, (err, data) => {
      if (err) reject('I could not find that file 😥');
      resolve(data);
    });
  });
};

const writeFilePromise = (file, data) => {
  return new Promise((resolve, reject) => {
    fs.writeFile(file, data, err => {
      if (err) reject('Could not write file 😥');
      resolve('Success! ✌');
    });
  });
};

const getDogPic = async () => {
  try {
    const data = await readFilePromise(`${__dirname}/dog.txt`);
    console.log(`Breed: ${data}`);

    const res1Pro = superagent.get(`https://dog.ceo/api/breed/${data}/images/random`);
    const res2Pro = superagent.get(`https://dog.ceo/api/breed/${data}/images/random`);
    const res3Pro = superagent.get(`https://dog.ceo/api/breed/${data}/images/random`);

    const all = await Promise.all([res1Pro, res2Pro, res3Pro]);
    const imgs = all.map(el => el.body.message);

    await writeFilePromise('dog-img.txt', imgs.join('\n'));
    console.log('Random dog image saved to file!');
  } catch (err) {
    console.log(err);
    throw err;
  }

  return '2: READY 🐶';
};

(async () => {
  try {
    console.log('1: Will get dog pics!');
    const x = await getDogPic();
    console.log(x);
    console.log('3: Done getting dog pics!');
  } catch (err) {
    console.log('ERROR 💥');
  }
})();
/* console.log('1: Will get dog pics!');
getDogPic()
  .then(x => {
    console.log(x);
    console.log('3: Done getting dog pics!');
  })
  .catch(err => {
    console.log('ERROR 💥');
  }); */

/* readFilePromise(`${__dirname}/dog.txt`)
    .then(data => {
        console.log(`Breed: ${data}`);
        return superagent.get(`https://dog.ceo/api/breed/${data}/images/random`);
    })
    .then(res => {
        console.log(res.body.message);
        return writeFilePromise('dog-img.txt', res.body.message);
    })
    .then(() => {
        console.log('Random dog image saved to file!');
    })
    .catch(err => console.log(err)); */

/* fs.readFile(`${__dirname}/dog.txt`, (err, data) => {

    if (err) return console.log(err.message);

    console.log(`Breed: ${data}`);

    superagent.get(`https://dog.ceo/api/breed/${data}/images/random`).then(res => {

        console.log(res.body.message);

        fs.writeFile('dog-img.txt', res.body.message, err => {
            if (err) return console.log(err.message);
            console.log('Random dog image saved to file!');
        });
    }).catch(err => console.log(err.message));
});
 */