async

import { FileHandler } from './services/file-handler.js';

const reader = new FileHandler();

reader
    .read('./data/tasks.all.json')
    .then(data => JSON.parse(data))
    .then(data => {
        const done = data.tasks.filter(x => x.status === 'done')
        const pending = data.tasks.filter(x => x.status === 'pending')

        const promise1 = reader.write('./data/tasks.done.json', JSON.stringify(done, null, 2));
        const promise2 = reader.write('./data/tasks.pending.json', JSON.stringify(pending, null, 2));

        Promise.allSettled([promise1, promise2]).then(errors => {
            const error = errors.filter(x => x.status === 'rejected').map(x => x.reason)

            if (error.length > 0) {
                console.log('There is an Error/s, check the log.')
            }

            reader.read('./logs/default.log')
                .then(data => {
                    reader
                        .write('./logs/default.log', data + '\n' + error.join('\n'))
                        .catch(err => console.log(err));
                })
                .catch(err => console.log(err))
        }).catch(err => console.log(err));

    }).catch(err => {
        reader
            .read('./logs/default.log')
            .then(data => {
                reader
                    .write('./logs/default.log', data + '\n' + err)
                    .catch(err => console.log(err));
            }).catch(err => console.log(err))

        console.log('There is an Error thrown, check the log.')
    });