htmlizeJson.js

Number.prototype.times = function (callback) {
  const collect = [];
  for (let i = 0; i < this; i++) {
    collect.push(callback(i, this));
  }
  return collect;
}

function htmlizeLeef(data, parent) {
  const indent = (data.level - 1).times(i => "&nbsp;&nbsp;").join('');
  return `<tr><th align=\"left\">${indent}${data.key}</th><td align=\"right\">${data.value}</td>`;
}

function buildHtmlObject(empty, header) {
  if (empty) return { top: '', bottom: '' };
  const top = "<table>\n" + (header ? "<tr><th align=\"left\">key</th><th align=\"right\">value</th></tr>\n" : "");
  const bottom = "</table>\n";
  return { top, bottom };
}

function htmlize(json, key = '', level = 0, parent = undefined) {
  if (typeof json === 'object') {
    const { top, bottom } = buildHtmlObject(level > 0, level === 0);
    const object_content = Object.keys(json).map(key => {
      const subbuild = htmlize(json[key], key, level + 1, json);
      return subbuild;
    });
    const object_head = htmlizeLeef({ level: level, key: key, value: object_content.join("\n") }, parent);
    return top + object_head + bottom;
  }
  else {
    const { top, bottom } = buildHtmlObject(level > 0, level === 0);
    return top + htmlizeLeef({ level: level, key: key, value: JSON.stringify(json) }, parent) + bottom;
  }
}

module.exports = {
  htmlize,
}