vast-builder/lib/vast-parser.js

An intuitive standard IAB Vast XML generation API. Complient with specifications Vast 2.0 / 3.0 / 4.0

const convert = require('xml-js');
const VastElement = require('./vast-element');

const buildVast = (current, currentTag) => {
  /* istanbul ignore next */
  if (current && current.elements) {
    if (
      current.elements.length == 1 &&
      (current.elements[0].text || current.elements[0].cdata)
    ) {
      const currentTmp = current.elements[0];
      const currentText = currentTmp.text || currentTmp.cdata;
      currentTag.content = currentText;
    } else {
      for (let i = 0; i < current.elements.length; i++) {
        const currentTmp = current.elements[i];
        currentChild = currentTag.dangerouslyAttachCustomTag(
          currentTmp.name,
          currentTmp.attributes
        );
        buildVast(currentTmp, currentChild);
      }
    }
  }
};

const yellow = '\x1b[33m';
const red = '\x1b[31m';
const reset = '\x1b[0m';
const intro = `${yellow}VAST-BUILDER ${red}ERROR${yellow}:${reset}`;

module.exports = (vastRawCode, options = {}) => {
  options = Object.assign(
    {},
    {
      logWarn: false
    },
    options
  );
  let parsedXml;
  try {
    parsedXml = convert.xml2js(vastRawCode);
  } catch (error) {
    if (options.logWarn) {
      console.error(
        `${intro} Error during the vast parsing, it seems not valid XML`
      );
    }
    return false;
  }
  let root = new VastElement();
  root.parseOptions(options);

  buildVast(parsedXml, root);

  return root.validate();
};