Output trello json to a hierarchical text file (org mode but could easily be markdown instead)

trello-to-text.js

#!/usr/bin/env node
/*
 * I want to convert trello to a hierarchical text file (org mode)
 *
 * Trello can export to json. Save that json to a file. Then run this program.
 */

/*
 * Notes about format:
 *
 * cards have id: idList: name: idLabels: dateLastActivity:
 *   idChecklists: url: desc:(markdown format) closed:
 *
 * labels have id: name: color: closed:
 * 
 * lists have id: name: 
 * 
 * where are comments? 
 * look under actions, {id: type:"commentCard", data: {card: {id:}, text:}
 */

// TODO: use command line args for input & output filenames

const json = require('./redblobgames-2020.json');
const util = require('util');
const {execFileSync} = require('child_process');

const OUT = (...args) => process.stdout.write(args.join('\n') + '\n');

function formatDate(date) {
    return `<${date.slice(0, 10)}>`;
}

function markdownToOrg(input) {
    let output = execFileSync('pandoc', ['--from=markdown_strict-raw_html', '--to=org', '--columns=100000'], {input});
    output = output.toString() ?? "";
    output = output.trim();
    return output;
}

function output() {
    OUT(`* ${json.name}`,
        ``);

    for (let list of json.lists) {
        OUT(`** ${list.name}`,
            ``);

        for (let card of json.cards.filter(card => card.idList === list.id)) {
            let labels = card.idLabels.map(id => json.labels.find(label => label.id === id)?.name).join(':');
            if (labels.length > 0) { labels = ` :${labels}:`; }
            OUT(`*** ${card.name}${labels}`,
                `${formatDate(card.dateLastActivity)}`,
                ``,
                `${markdownToOrg(card.desc)}`);

            for (let checklist of json.checklists.filter(checklist => checklist.idCard === card.id)) {
                OUT();
                for (let item of checklist.checkItems) {
                    let marker = item.state === 'complete'? '[X]' : '[ ]';
                    OUT(`- ${marker} ${markdownToOrg(item.name)}`);
                }
            }
            
            for (let comment of json.actions.filter(action => action.type === "commentCard" && action.data.card.id === card.id)) {
                OUT(``,
                    `**** comment from ${comment.memberCreator.username} ${formatDate(comment.date)}`,
                    `${markdownToOrg(comment.data.text)}`);
            }

            OUT();
        }
    }
}

output();